Merge branch 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm

* 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (142 commits)
  KVM: Initialize fpu state in preemptible context
  KVM: VMX: when entering real mode align segment base to 16 bytes
  KVM: MMU: handle 'map_writable' in set_spte() function
  KVM: MMU: audit: allow audit more guests at the same time
  KVM: Fetch guest cr3 from hardware on demand
  KVM: Replace reads of vcpu->arch.cr3 by an accessor
  KVM: MMU: only write protect mappings at pagetable level
  KVM: VMX: Correct asm constraint in vmcs_load()/vmcs_clear()
  KVM: MMU: Initialize base_role for tdp mmus
  KVM: VMX: Optimize atomic EFER load
  KVM: VMX: Add definitions for more vm entry/exit control bits
  KVM: SVM: copy instruction bytes from VMCB
  KVM: SVM: implement enhanced INVLPG intercept
  KVM: SVM: enhance mov DR intercept handler
  KVM: SVM: enhance MOV CR intercept handler
  KVM: SVM: add new SVM feature bit names
  KVM: cleanup emulate_instruction
  KVM: move complete_insn_gp() into x86.c
  KVM: x86: fix CR8 handling
  KVM guest: Fix kvm clock initialization when it's configured out
  ...

43 files changed, 3078 insertions, 1185 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 338c96ea0855..55fe7599bc8e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1705,6 +1705,9 @@ and is between 256 and 4096 characters. It is defined in the file
 
         no-kvmclock     [X86,KVM] Disable paravirtualized KVM clock driver
 
+        no-kvmapf       [X86,KVM] Disable paravirtualized asynchronous page
+                        fault handling.
+
         nolapic         [X86-32,APIC] Do not enable or use the local APIC.
 
         nolapic_timer   [X86-32,APIC] Do not use the local APIC timer.
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt
index 50713e37c695..ad85797c1cf0 100644
--- a/Documentation/kvm/api.txt
+++ b/Documentation/kvm/api.txt
@@ -1085,6 +1085,184 @@ of 4 instructions that make up a hypercall.
 If any additional field gets added to this structure later on, a bit for that
 additional piece of information will be set in the flags bitmap.
 
+4.47 KVM_ASSIGN_PCI_DEVICE
+
+Capability: KVM_CAP_DEVICE_ASSIGNMENT
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_assigned_pci_dev (in)
+Returns: 0 on success, -1 on error
+
+Assigns a host PCI device to the VM.
+
+struct kvm_assigned_pci_dev {
+        __u32 assigned_dev_id;
+        __u32 busnr;
+        __u32 devfn;
+        __u32 flags;
+        __u32 segnr;
+        union {
+                __u32 reserved[11];
+        };
+};
+
+The PCI device is specified by the triple segnr, busnr, and devfn.
+Identification in succeeding service requests is done via assigned_dev_id. The
+following flags are specified:
+
+/* Depends on KVM_CAP_IOMMU */
+#define KVM_DEV_ASSIGN_ENABLE_IOMMU     (1 << 0)
+
+4.48 KVM_DEASSIGN_PCI_DEVICE
+
+Capability: KVM_CAP_DEVICE_DEASSIGNMENT
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_assigned_pci_dev (in)
+Returns: 0 on success, -1 on error
+
+Ends PCI device assignment, releasing all associated resources.
+
+See KVM_CAP_DEVICE_ASSIGNMENT for the data structure. Only assigned_dev_id is
+used in kvm_assigned_pci_dev to identify the device.
+
+4.49 KVM_ASSIGN_DEV_IRQ
+
+Capability: KVM_CAP_ASSIGN_DEV_IRQ
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_assigned_irq (in)
+Returns: 0 on success, -1 on error
+
+Assigns an IRQ to a passed-through device.
+
+struct kvm_assigned_irq {
+        __u32 assigned_dev_id;
+        __u32 host_irq;
+        __u32 guest_irq;
+        __u32 flags;
+        union {
+                struct {
+                        __u32 addr_lo;
+                        __u32 addr_hi;
+                        __u32 data;
+                } guest_msi;
+                __u32 reserved[12];
+        };
+};
+
+The following flags are defined:
+
+#define KVM_DEV_IRQ_HOST_INTX    (1 << 0)
+#define KVM_DEV_IRQ_HOST_MSI     (1 << 1)
+#define KVM_DEV_IRQ_HOST_MSIX    (1 << 2)
+
+#define KVM_DEV_IRQ_GUEST_INTX   (1 << 8)
+#define KVM_DEV_IRQ_GUEST_MSI    (1 << 9)
+#define KVM_DEV_IRQ_GUEST_MSIX   (1 << 10)
+
+It is not valid to specify multiple types per host or guest IRQ. However, the
+IRQ type of host and guest can differ or can even be null.
+
+4.50 KVM_DEASSIGN_DEV_IRQ
+
+Capability: KVM_CAP_ASSIGN_DEV_IRQ
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_assigned_irq (in)
+Returns: 0 on success, -1 on error
+
+Ends an IRQ assignment to a passed-through device.
+
+See KVM_ASSIGN_DEV_IRQ for the data structure. The target device is specified
+by assigned_dev_id, flags must correspond to the IRQ type specified on
+KVM_ASSIGN_DEV_IRQ. Partial deassignment of host or guest IRQ is allowed.
+
+4.51 KVM_SET_GSI_ROUTING
+
+Capability: KVM_CAP_IRQ_ROUTING
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_irq_routing (in)
+Returns: 0 on success, -1 on error
+
+Sets the GSI routing table entries, overwriting any previously set entries.
+
+struct kvm_irq_routing {
+        __u32 nr;
+        __u32 flags;
+        struct kvm_irq_routing_entry entries[0];
+};
+
+No flags are specified so far, the corresponding field must be set to zero.
+
+struct kvm_irq_routing_entry {
+        __u32 gsi;
+        __u32 type;
+        __u32 flags;
+        __u32 pad;
+        union {
+                struct kvm_irq_routing_irqchip irqchip;
+                struct kvm_irq_routing_msi msi;
+                __u32 pad[8];
+        } u;
+};
+
+/* gsi routing entry types */
+#define KVM_IRQ_ROUTING_IRQCHIP 1
+#define KVM_IRQ_ROUTING_MSI 2
+
+No flags are specified so far, the corresponding field must be set to zero.
+
+struct kvm_irq_routing_irqchip {
+        __u32 irqchip;
+        __u32 pin;
+};
+
+struct kvm_irq_routing_msi {
+        __u32 address_lo;
+        __u32 address_hi;
+        __u32 data;
+        __u32 pad;
+};
+
+4.52 KVM_ASSIGN_SET_MSIX_NR
+
+Capability: KVM_CAP_DEVICE_MSIX
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_assigned_msix_nr (in)
+Returns: 0 on success, -1 on error
+
+Set the number of MSI-X interrupts for an assigned device. This service can
+only be called once in the lifetime of an assigned device.
+
+struct kvm_assigned_msix_nr {
+        __u32 assigned_dev_id;
+        __u16 entry_nr;
+        __u16 padding;
+};
+
+#define KVM_MAX_MSIX_PER_DEV            256
+
+4.53 KVM_ASSIGN_SET_MSIX_ENTRY
+
+Capability: KVM_CAP_DEVICE_MSIX
+Architectures: x86 ia64
+Type: vm ioctl
+Parameters: struct kvm_assigned_msix_entry (in)
+Returns: 0 on success, -1 on error
+
+Specifies the routing of an MSI-X assigned device interrupt to a GSI. Setting
+the GSI vector to zero means disabling the interrupt.
+
+struct kvm_assigned_msix_entry {
+        __u32 assigned_dev_id;
+        __u32 gsi;
+        __u16 entry; /* The index of entry in the MSI-X table */
+        __u16 padding[3];
+};
+
 5. The kvm_run structure
 
 Application code obtains a pointer to the kvm_run structure by
diff --git a/Documentation/kvm/cpuid.txt b/Documentation/kvm/cpuid.txt
index 14a12ea92b7f..882068538c9c 100644
--- a/Documentation/kvm/cpuid.txt
+++ b/Documentation/kvm/cpuid.txt
@@ -36,6 +36,9 @@ KVM_FEATURE_MMU_OP                 ||     2 || deprecated.
 KVM_FEATURE_CLOCKSOURCE2           ||     3 || kvmclock available at msrs
                                    ||       || 0x4b564d00 and 0x4b564d01
 ------------------------------------------------------------------------------
+KVM_FEATURE_ASYNC_PF               ||     4 || async pf can be enabled by
+                                   ||       || writing to msr 0x4b564d02
+------------------------------------------------------------------------------
 KVM_FEATURE_CLOCKSOURCE_STABLE_BIT ||    24 || host will warn if no guest-side
                                    ||       || per-cpu warps are expected in
                                    ||       || kvmclock.
diff --git a/Documentation/kvm/msr.txt b/Documentation/kvm/msr.txt
index 8ddcfe84c09a..d079aed27e03 100644
--- a/Documentation/kvm/msr.txt
+++ b/Documentation/kvm/msr.txt
@@ -3,7 +3,6 @@ Glauber Costa <glommer@redhat.com>, Red Hat Inc, 2010
 =====================================================
 
 KVM makes use of some custom MSRs to service some requests.
-At present, this facility is only used by kvmclock.
 
 Custom MSRs have a range reserved for them, that goes from
 0x4b564d00 to 0x4b564dff. There are MSRs outside this area,
@@ -151,3 +150,38 @@ MSR_KVM_SYSTEM_TIME: 0x12
                         return PRESENT;
                 } else
                         return NON_PRESENT;
+
+MSR_KVM_ASYNC_PF_EN: 0x4b564d02
+        data: Bits 63-6 hold 64-byte aligned physical address of a
+        64 byte memory area which must be in guest RAM and must be
+        zeroed. Bits 5-2 are reserved and should be zero. Bit 0 is 1
+        when asynchronous page faults are enabled on the vcpu 0 when
+        disabled. Bit 2 is 1 if asynchronous page faults can be injected
+        when vcpu is in cpl == 0.
+
+        First 4 byte of 64 byte memory location will be written to by
+        the hypervisor at the time of asynchronous page fault (APF)
+        injection to indicate type of asynchronous page fault. Value
+        of 1 means that the page referred to by the page fault is not
+        present. Value 2 means that the page is now available. Disabling
+        interrupt inhibits APFs. Guest must not enable interrupt
+        before the reason is read, or it may be overwritten by another
+        APF. Since APF uses the same exception vector as regular page
+        fault guest must reset the reason to 0 before it does
+        something that can generate normal page fault.  If during page
+        fault APF reason is 0 it means that this is regular page
+        fault.
+
+        During delivery of type 1 APF cr2 contains a token that will
+        be used to notify a guest when missing page becomes
+        available. When page becomes available type 2 APF is sent with
+        cr2 set to the token associated with the page. There is special
+        kind of token 0xffffffff which tells vcpu that it should wake
+        up all processes waiting for APFs and no individual type 2 APFs
+        will be sent.
+
+        If APF is disabled while there are outstanding APFs, they will
+        not be delivered.
+
+        Currently type 2 APF will be always delivered on the same vcpu as
+        type 1 was, but guest should not rely on that.
diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h
index 2f229e5de498..2689ee54a1c9 100644
--- a/arch/ia64/include/asm/kvm_host.h
+++ b/arch/ia64/include/asm/kvm_host.h
@@ -590,6 +590,10 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 void kvm_sal_emul(struct kvm_vcpu *vcpu);
 
+#define __KVM_HAVE_ARCH_VM_ALLOC 1
+struct kvm *kvm_arch_alloc_vm(void);
+void kvm_arch_free_vm(struct kvm *kvm);
+
 #endif /* __ASSEMBLY__*/
 
 #endif
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index f56a6316e134..70d224d4264c 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -749,7 +749,7 @@ out:
         return r;
 }
 
-static struct kvm *kvm_alloc_kvm(void)
+struct kvm *kvm_arch_alloc_vm(void)
 {
 
         struct kvm *kvm;
@@ -760,7 +760,7 @@ static struct kvm *kvm_alloc_kvm(void)
         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 
         if (!vm_base)
-                return ERR_PTR(-ENOMEM);
+                return NULL;
 
         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
         kvm = (struct kvm *)(vm_base +
@@ -806,10 +806,12 @@ static void kvm_build_io_pmt(struct kvm *kvm)
 #define GUEST_PHYSICAL_RR4      0x2739
 #define VMM_INIT_RR             0x1660
 
-static void kvm_init_vm(struct kvm *kvm)
+int kvm_arch_init_vm(struct kvm *kvm)
 {
         BUG_ON(!kvm);
 
+        kvm->arch.is_sn2 = ia64_platform_is("sn2");
+
         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
         kvm->arch.vmm_init_rr = VMM_INIT_RR;
@@ -823,21 +825,8 @@ static void kvm_init_vm(struct kvm *kvm)
 
         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
-}
-
-struct  kvm *kvm_arch_create_vm(void)
-{
-        struct kvm *kvm = kvm_alloc_kvm();
-
-        if (IS_ERR(kvm))
-                return ERR_PTR(-ENOMEM);
-
-        kvm->arch.is_sn2 = ia64_platform_is("sn2");
-
-        kvm_init_vm(kvm);
-
-        return kvm;
 
+        return 0;
 }
 
 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
@@ -962,7 +951,9 @@ long kvm_arch_vm_ioctl(struct file *filp,
                         goto out;
                 r = kvm_setup_default_irq_routing(kvm);
                 if (r) {
+                        mutex_lock(&kvm->slots_lock);
                         kvm_ioapic_destroy(kvm);
+                        mutex_unlock(&kvm->slots_lock);
                         goto out;
                 }
                 break;
@@ -1357,7 +1348,7 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
         return -EINVAL;
 }
 
-static void free_kvm(struct kvm *kvm)
+void kvm_arch_free_vm(struct kvm *kvm)
 {
         unsigned long vm_base = kvm->arch.vm_base;
 
@@ -1399,9 +1390,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 #endif
         kfree(kvm->arch.vioapic);
         kvm_release_vm_pages(kvm);
-        kvm_free_physmem(kvm);
-        cleanup_srcu_struct(&kvm->srcu);
-        free_kvm(kvm);
 }
 
 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index e316847c08c0..badc983031b3 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -1307,12 +1307,10 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
         int err = -ENOMEM;
         unsigned long p;
 
-        vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
+        vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
         if (!vcpu_book3s)
                 goto out;
 
-        memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s));
-
         vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
                 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
         if (!vcpu_book3s->shadow_vcpu)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 38f756f25053..99758460efde 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -145,18 +145,12 @@ void kvm_arch_check_processor_compat(void *rtn)
         *(int *)rtn = kvmppc_core_check_processor_compat();
 }
 
-struct kvm *kvm_arch_create_vm(void)
+int kvm_arch_init_vm(struct kvm *kvm)
 {
-        struct kvm *kvm;
-
-        kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
-        if (!kvm)
-                return ERR_PTR(-ENOMEM);
-
-        return kvm;
+        return 0;
 }
 
-static void kvmppc_free_vcpus(struct kvm *kvm)
+void kvm_arch_destroy_vm(struct kvm *kvm)
 {
         unsigned int i;
         struct kvm_vcpu *vcpu;
@@ -176,14 +170,6 @@ void kvm_arch_sync_events(struct kvm *kvm)
 {
 }
 
-void kvm_arch_destroy_vm(struct kvm *kvm)
-{
-        kvmppc_free_vcpus(kvm);
-        kvm_free_physmem(kvm);
-        cleanup_srcu_struct(&kvm->srcu);
-        kfree(kvm);
-}
-
 int kvm_dev_ioctl_check_extension(long ext)
 {
         int r;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 985d825494f1..bade533ba288 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -164,24 +164,18 @@ long kvm_arch_vm_ioctl(struct file *filp,
         return r;
 }
 
-struct kvm *kvm_arch_create_vm(void)
+int kvm_arch_init_vm(struct kvm *kvm)
 {
-        struct kvm *kvm;
         int rc;
         char debug_name[16];
 
         rc = s390_enable_sie();
         if (rc)
-                goto out_nokvm;
-
-        rc = -ENOMEM;
-        kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
-        if (!kvm)
-                goto out_nokvm;
+                goto out_err;
 
         kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL);
         if (!kvm->arch.sca)
-                goto out_nosca;
+                goto out_err;
 
         sprintf(debug_name, "kvm-%u", current->pid);
 
@@ -195,13 +189,11 @@ struct kvm *kvm_arch_create_vm(void)
         debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
         VM_EVENT(kvm, 3, "%s", "vm created");
 
-        return kvm;
+        return 0;
 out_nodbf:
         free_page((unsigned long)(kvm->arch.sca));
-out_nosca:
-        kfree(kvm);
-out_nokvm:
-        return ERR_PTR(rc);
+out_err:
+        return rc;
 }
 
 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
@@ -240,11 +232,8 @@ void kvm_arch_sync_events(struct kvm *kvm)
 void kvm_arch_destroy_vm(struct kvm *kvm)
 {
         kvm_free_vcpus(kvm);
-        kvm_free_physmem(kvm);
         free_page((unsigned long)(kvm->arch.sca));
         debug_unregister(kvm->arch.dbf);
-        cleanup_srcu_struct(&kvm->srcu);
-        kfree(kvm);
 }
 
 /* Section: vcpu related */
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index b36c6b3fe144..8e37deb1eb38 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -15,6 +15,14 @@
 
 struct x86_emulate_ctxt;
 
+struct x86_exception {
+        u8 vector;
+        bool error_code_valid;
+        u16 error_code;
+        bool nested_page_fault;
+        u64 address; /* cr2 or nested page fault gpa */
+};
+
 /*
  * x86_emulate_ops:
  *
@@ -64,7 +72,8 @@ struct x86_emulate_ops {
          *  @bytes: [IN ] Number of bytes to read from memory.
          */
         int (*read_std)(unsigned long addr, void *val,
-                        unsigned int bytes, struct kvm_vcpu *vcpu, u32 *error);
+                        unsigned int bytes, struct kvm_vcpu *vcpu,
+                        struct x86_exception *fault);
 
         /*
          * write_std: Write bytes of standard (non-emulated/special) memory.
@@ -74,7 +83,8 @@ struct x86_emulate_ops {
          *  @bytes: [IN ] Number of bytes to write to memory.
          */
         int (*write_std)(unsigned long addr, void *val,
-                         unsigned int bytes, struct kvm_vcpu *vcpu, u32 *error);
+                         unsigned int bytes, struct kvm_vcpu *vcpu,
+                         struct x86_exception *fault);
         /*
          * fetch: Read bytes of standard (non-emulated/special) memory.
          *        Used for instruction fetch.
@@ -83,7 +93,8 @@ struct x86_emulate_ops {
          *  @bytes: [IN ] Number of bytes to read from memory.
          */
         int (*fetch)(unsigned long addr, void *val,
-                        unsigned int bytes, struct kvm_vcpu *vcpu, u32 *error);
+                     unsigned int bytes, struct kvm_vcpu *vcpu,
+                     struct x86_exception *fault);
 
         /*
          * read_emulated: Read bytes from emulated/special memory area.
@@ -94,7 +105,7 @@ struct x86_emulate_ops {
         int (*read_emulated)(unsigned long addr,
                              void *val,
                              unsigned int bytes,
-                             unsigned int *error,
+                             struct x86_exception *fault,
                              struct kvm_vcpu *vcpu);
 
         /*
@@ -107,7 +118,7 @@ struct x86_emulate_ops {
         int (*write_emulated)(unsigned long addr,
                               const void *val,
                               unsigned int bytes,
-                              unsigned int *error,
+                              struct x86_exception *fault,
                               struct kvm_vcpu *vcpu);
 
         /*
@@ -122,7 +133,7 @@ struct x86_emulate_ops {
                                 const void *old,
                                 const void *new,
                                 unsigned int bytes,
-                                unsigned int *error,
+                                struct x86_exception *fault,
                                 struct kvm_vcpu *vcpu);
 
         int (*pio_in_emulated)(int size, unsigned short port, void *val,
@@ -159,7 +170,10 @@ struct operand {
         };
         union {
                 unsigned long *reg;
-                unsigned long mem;
+                struct segmented_address {
+                        ulong ea;
+                        unsigned seg;
+                } mem;
         } addr;
         union {
                 unsigned long val;
@@ -226,9 +240,8 @@ struct x86_emulate_ctxt {
 
         bool perm_ok; /* do not check permissions if true */
 
-        int exception; /* exception that happens during emulation or -1 */
-        u32 error_code; /* error code for exception */
-        bool error_code_valid;
+        bool have_exception;
+        struct x86_exception exception;
 
         /* decode cache */
         struct decode_cache decode;
@@ -252,7 +265,7 @@ struct x86_emulate_ctxt {
 #define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64
 #endif
 
-int x86_decode_insn(struct x86_emulate_ctxt *ctxt);
+int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len);
 #define EMULATION_FAILED -1
 #define EMULATION_OK 0
 #define EMULATION_RESTART 1
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f702f82aa1eb..aa75f21a9fba 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -83,11 +83,14 @@
 #define KVM_NR_FIXED_MTRR_REGION 88
 #define KVM_NR_VAR_MTRR 8
 
+#define ASYNC_PF_PER_VCPU 64
+
 extern spinlock_t kvm_lock;
 extern struct list_head vm_list;
 
 struct kvm_vcpu;
 struct kvm;
+struct kvm_async_pf;
 
 enum kvm_reg {
         VCPU_REGS_RAX = 0,
@@ -114,6 +117,7 @@ enum kvm_reg {
 
 enum kvm_reg_ex {
         VCPU_EXREG_PDPTR = NR_VCPU_REGS,
+        VCPU_EXREG_CR3,
 };
 
 enum {
@@ -238,16 +242,18 @@ struct kvm_mmu {
         void (*new_cr3)(struct kvm_vcpu *vcpu);
         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
         unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
-        int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
-        void (*inject_page_fault)(struct kvm_vcpu *vcpu);
+        int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
+                          bool prefault);
+        void (*inject_page_fault)(struct kvm_vcpu *vcpu,
+                                  struct x86_exception *fault);
         void (*free)(struct kvm_vcpu *vcpu);
         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
-                            u32 *error);
+                            struct x86_exception *exception);
         gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
         void (*prefetch_page)(struct kvm_vcpu *vcpu,
                               struct kvm_mmu_page *page);
         int (*sync_page)(struct kvm_vcpu *vcpu,
-                         struct kvm_mmu_page *sp, bool clear_unsync);
+                         struct kvm_mmu_page *sp);
         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
         hpa_t root_hpa;
         int root_level;
@@ -315,16 +321,6 @@ struct kvm_vcpu_arch {
          */
         struct kvm_mmu *walk_mmu;
 
-        /*
-         * This struct is filled with the necessary information to propagate a
-         * page fault into the guest
-         */
-        struct {
-                u64      address;
-                unsigned error_code;
-                bool     nested;
-        } fault;
-
         /* only needed in kvm_pv_mmu_op() path, but it's hot so
          * put it here to avoid allocation */
         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
@@ -412,6 +408,15 @@ struct kvm_vcpu_arch {
         u64 hv_vapic;
 
         cpumask_var_t wbinvd_dirty_mask;
+
+        struct {
+                bool halted;
+                gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
+                struct gfn_to_hva_cache data;
+                u64 msr_val;
+                u32 id;
+                bool send_user_only;
+        } apf;
 };
 
 struct kvm_arch {
@@ -456,6 +461,10 @@ struct kvm_arch {
         /* fields used by HYPER-V emulation */
         u64 hv_guest_os_id;
         u64 hv_hypercall;
+
+        #ifdef CONFIG_KVM_MMU_AUDIT
+        int audit_point;
+        #endif
 };
 
 struct kvm_vm_stat {
@@ -529,6 +538,7 @@ struct kvm_x86_ops {
                             struct kvm_segment *var, int seg);
         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
         void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
+        void (*decache_cr3)(struct kvm_vcpu *vcpu);
         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
@@ -582,9 +592,17 @@ struct kvm_x86_ops {
 
         void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
 
+        void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2);
         const struct trace_print_flags *exit_reasons_str;
 };
 
+struct kvm_arch_async_pf {
+        u32 token;
+        gfn_t gfn;
+        unsigned long cr3;
+        bool direct_map;
+};
+
 extern struct kvm_x86_ops *kvm_x86_ops;
 
 int kvm_mmu_module_init(void);
@@ -594,7 +612,6 @@ void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
-void kvm_mmu_set_base_ptes(u64 base_pte);
 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 
@@ -623,8 +640,15 @@ enum emulation_result {
 #define EMULTYPE_NO_DECODE          (1 << 0)
 #define EMULTYPE_TRAP_UD            (1 << 1)
 #define EMULTYPE_SKIP               (1 << 2)
-int emulate_instruction(struct kvm_vcpu *vcpu,
-                        unsigned long cr2, u16 error_code, int emulation_type);
+int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
+                            int emulation_type, void *insn, int insn_len);
+
+static inline int emulate_instruction(struct kvm_vcpu *vcpu,
+                        int emulation_type)
+{
+        return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0);
+}
+
 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 
@@ -650,7 +674,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
-void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
+int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
@@ -668,11 +692,11 @@ void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
-void kvm_inject_page_fault(struct kvm_vcpu *vcpu);
+void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
                             gfn_t gfn, void *data, int offset, int len,
                             u32 access);
-void kvm_propagate_fault(struct kvm_vcpu *vcpu);
+void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 
 int kvm_pic_set_irq(void *opaque, int irq, int level);
@@ -690,16 +714,21 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
-gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
-gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
-gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
-gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
+gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
+                              struct x86_exception *exception);
+gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
+                               struct x86_exception *exception);
+gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
+                               struct x86_exception *exception);
+gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
+                                struct x86_exception *exception);
 
 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 
 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 
-int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
+int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
+                       void *insn, int insn_len);
 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 
 void kvm_enable_tdp(void);
@@ -766,20 +795,25 @@ enum {
 #define HF_VINTR_MASK           (1 << 2)
 #define HF_NMI_MASK             (1 << 3)
 #define HF_IRET_MASK            (1 << 4)
+#define HF_GUEST_MASK           (1 << 5) /* VCPU is in guest-mode */
 
 /*
  * Hardware virtualization extension instructions may fault if a
  * reboot turns off virtualization while processes are running.
  * Trap the fault and ignore the instruction if that happens.
  */
-asmlinkage void kvm_handle_fault_on_reboot(void);
+asmlinkage void kvm_spurious_fault(void);
+extern bool kvm_rebooting;
 
 #define __kvm_handle_fault_on_reboot(insn) \
         "666: " insn "\n\t" \
+        "668: \n\t"                           \
         ".pushsection .fixup, \"ax\" \n" \
         "667: \n\t" \
+        "cmpb $0, kvm_rebooting \n\t"         \
+        "jne 668b \n\t"                       \
         __ASM_SIZE(push) " $666b \n\t"        \
-        "jmp kvm_handle_fault_on_reboot \n\t" \
+        "call kvm_spurious_fault \n\t"        \
         ".popsection \n\t" \
         ".pushsection __ex_table, \"a\" \n\t" \
         _ASM_PTR " 666b, 667b \n\t" \
@@ -799,4 +833,15 @@ void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
 
 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
 
+void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
+                                     struct kvm_async_pf *work);
+void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
+                                 struct kvm_async_pf *work);
+void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
+                               struct kvm_async_pf *work);
+bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
+extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
+
+void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
+
 #endif /* _ASM_X86_KVM_HOST_H */
diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 7b562b6184bc..a427bf77a93d 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -20,6 +20,7 @@
  * are available. The use of 0x11 and 0x12 is deprecated
  */
 #define KVM_FEATURE_CLOCKSOURCE2        3
+#define KVM_FEATURE_ASYNC_PF            4
 
 /* The last 8 bits are used to indicate how to interpret the flags field
  * in pvclock structure. If no bits are set, all flags are ignored.
@@ -32,9 +33,13 @@
 /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
 #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
+#define MSR_KVM_ASYNC_PF_EN 0x4b564d02
 
 #define KVM_MAX_MMU_OP_BATCH           32
 
+#define KVM_ASYNC_PF_ENABLED                    (1 << 0)
+#define KVM_ASYNC_PF_SEND_ALWAYS                (1 << 1)
+
 /* Operations for KVM_HC_MMU_OP */
 #define KVM_MMU_OP_WRITE_PTE            1
 #define KVM_MMU_OP_FLUSH_TLB            2
@@ -61,10 +66,20 @@ struct kvm_mmu_op_release_pt {
         __u64 pt_phys;
 };
 
+#define KVM_PV_REASON_PAGE_NOT_PRESENT 1
+#define KVM_PV_REASON_PAGE_READY 2
+
+struct kvm_vcpu_pv_apf_data {
+        __u32 reason;
+        __u8 pad[60];
+        __u32 enabled;
+};
+
 #ifdef __KERNEL__
 #include <asm/processor.h>
 
 extern void kvmclock_init(void);
+extern int kvm_register_clock(char *txt);
 
 
 /* This instruction is vmcall.  On non-VT architectures, it will generate a
@@ -160,8 +175,17 @@ static inline unsigned int kvm_arch_para_features(void)
 
 #ifdef CONFIG_KVM_GUEST
 void __init kvm_guest_init(void);
+void kvm_async_pf_task_wait(u32 token);
+void kvm_async_pf_task_wake(u32 token);
+u32 kvm_read_and_reset_pf_reason(void);
 #else
 #define kvm_guest_init() do { } while (0)
+#define kvm_async_pf_task_wait(T) do {} while(0)
+#define kvm_async_pf_task_wake(T) do {} while(0)
+static inline u32 kvm_read_and_reset_pf_reason(void)
+{
+        return 0;
+}
 #endif
 
 #endif /* __KERNEL__ */
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index 0e831059ac5a..f2b83bc7d784 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -47,14 +47,13 @@ enum {
         INTERCEPT_MONITOR,
         INTERCEPT_MWAIT,
         INTERCEPT_MWAIT_COND,
+        INTERCEPT_XSETBV,
 };
 
 
 struct __attribute__ ((__packed__)) vmcb_control_area {
-        u16 intercept_cr_read;
-        u16 intercept_cr_write;
-        u16 intercept_dr_read;
-        u16 intercept_dr_write;
+        u32 intercept_cr;
+        u32 intercept_dr;
         u32 intercept_exceptions;
         u64 intercept;
         u8 reserved_1[42];
@@ -81,14 +80,19 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
         u32 event_inj_err;
         u64 nested_cr3;
         u64 lbr_ctl;
-        u64 reserved_5;
+        u32 clean;
+        u32 reserved_5;
         u64 next_rip;
-        u8 reserved_6[816];
+        u8 insn_len;
+        u8 insn_bytes[15];
+        u8 reserved_6[800];
 };
 
 
 #define TLB_CONTROL_DO_NOTHING 0
 #define TLB_CONTROL_FLUSH_ALL_ASID 1
+#define TLB_CONTROL_FLUSH_ASID 3
+#define TLB_CONTROL_FLUSH_ASID_LOCAL 7
 
 #define V_TPR_MASK 0x0f
 
@@ -204,19 +208,31 @@ struct __attribute__ ((__packed__)) vmcb {
 #define SVM_SELECTOR_READ_MASK SVM_SELECTOR_WRITE_MASK
 #define SVM_SELECTOR_CODE_MASK (1 << 3)
 
-#define INTERCEPT_CR0_MASK 1
-#define INTERCEPT_CR3_MASK (1 << 3)
-#define INTERCEPT_CR4_MASK (1 << 4)
-#define INTERCEPT_CR8_MASK (1 << 8)
-
-#define INTERCEPT_DR0_MASK 1
-#define INTERCEPT_DR1_MASK (1 << 1)
-#define INTERCEPT_DR2_MASK (1 << 2)
-#define INTERCEPT_DR3_MASK (1 << 3)
-#define INTERCEPT_DR4_MASK (1 << 4)
-#define INTERCEPT_DR5_MASK (1 << 5)
-#define INTERCEPT_DR6_MASK (1 << 6)
-#define INTERCEPT_DR7_MASK (1 << 7)
+#define INTERCEPT_CR0_READ      0
+#define INTERCEPT_CR3_READ      3
+#define INTERCEPT_CR4_READ      4
+#define INTERCEPT_CR8_READ      8
+#define INTERCEPT_CR0_WRITE     (16 + 0)
+#define INTERCEPT_CR3_WRITE     (16 + 3)
+#define INTERCEPT_CR4_WRITE     (16 + 4)
+#define INTERCEPT_CR8_WRITE     (16 + 8)
+
+#define INTERCEPT_DR0_READ      0
+#define INTERCEPT_DR1_READ      1
+#define INTERCEPT_DR2_READ      2
+#define INTERCEPT_DR3_READ      3
+#define INTERCEPT_DR4_READ      4
+#define INTERCEPT_DR5_READ      5
+#define INTERCEPT_DR6_READ      6
+#define INTERCEPT_DR7_READ      7
+#define INTERCEPT_DR0_WRITE     (16 + 0)
+#define INTERCEPT_DR1_WRITE     (16 + 1)
+#define INTERCEPT_DR2_WRITE     (16 + 2)
+#define INTERCEPT_DR3_WRITE     (16 + 3)
+#define INTERCEPT_DR4_WRITE     (16 + 4)
+#define INTERCEPT_DR5_WRITE     (16 + 5)
+#define INTERCEPT_DR6_WRITE     (16 + 6)
+#define INTERCEPT_DR7_WRITE     (16 + 7)
 
 #define SVM_EVTINJ_VEC_MASK 0xff
 
@@ -246,6 +262,8 @@ struct __attribute__ ((__packed__)) vmcb {
 #define SVM_EXITINFOSHIFT_TS_REASON_JMP 38
 #define SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE 44
 
+#define SVM_EXITINFO_REG_MASK 0x0F
+
 #define SVM_EXIT_READ_CR0       0x000
 #define SVM_EXIT_READ_CR3       0x003
 #define SVM_EXIT_READ_CR4       0x004
@@ -316,6 +334,7 @@ struct __attribute__ ((__packed__)) vmcb {
 #define SVM_EXIT_MONITOR        0x08a
 #define SVM_EXIT_MWAIT          0x08b
 #define SVM_EXIT_MWAIT_COND     0x08c
+#define SVM_EXIT_XSETBV         0x08d
 #define SVM_EXIT_NPF            0x400
 
 #define SVM_EXIT_ERR            -1
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index f66cda56781d..0310da67307f 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -30,6 +30,7 @@ asmlinkage void segment_not_present(void);
 asmlinkage void stack_segment(void);
 asmlinkage void general_protection(void);
 asmlinkage void page_fault(void);
+asmlinkage void async_page_fault(void);
 asmlinkage void spurious_interrupt_bug(void);
 asmlinkage void coprocessor_error(void);
 asmlinkage void alignment_check(void);
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 9f0cbd987d50..84471b810460 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -66,15 +66,23 @@
 #define PIN_BASED_NMI_EXITING                   0x00000008
 #define PIN_BASED_VIRTUAL_NMIS                  0x00000020
 
+#define VM_EXIT_SAVE_DEBUG_CONTROLS             0x00000002
 #define VM_EXIT_HOST_ADDR_SPACE_SIZE            0x00000200
+#define VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL      0x00001000
 #define VM_EXIT_ACK_INTR_ON_EXIT                0x00008000
 #define VM_EXIT_SAVE_IA32_PAT                   0x00040000
 #define VM_EXIT_LOAD_IA32_PAT                   0x00080000
+#define VM_EXIT_SAVE_IA32_EFER                  0x00100000
+#define VM_EXIT_LOAD_IA32_EFER                  0x00200000
+#define VM_EXIT_SAVE_VMX_PREEMPTION_TIMER       0x00400000
 
+#define VM_ENTRY_LOAD_DEBUG_CONTROLS            0x00000002
 #define VM_ENTRY_IA32E_MODE                     0x00000200
 #define VM_ENTRY_SMM                            0x00000400
 #define VM_ENTRY_DEACT_DUAL_MONITOR             0x00000800
+#define VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL     0x00002000
 #define VM_ENTRY_LOAD_IA32_PAT                  0x00004000
+#define VM_ENTRY_LOAD_IA32_EFER                 0x00008000
 
 /* VMCS Encodings */
 enum vmcs_field {
@@ -239,6 +247,7 @@ enum vmcs_field {
 #define EXIT_REASON_TASK_SWITCH         9
 #define EXIT_REASON_CPUID               10
 #define EXIT_REASON_HLT                 12
+#define EXIT_REASON_INVD                13
 #define EXIT_REASON_INVLPG              14
 #define EXIT_REASON_RDPMC               15
 #define EXIT_REASON_RDTSC               16
@@ -296,6 +305,12 @@ enum vmcs_field {
 #define GUEST_INTR_STATE_SMI            0x00000004
 #define GUEST_INTR_STATE_NMI            0x00000008
 
+/* GUEST_ACTIVITY_STATE flags */
+#define GUEST_ACTIVITY_ACTIVE           0
+#define GUEST_ACTIVITY_HLT              1
+#define GUEST_ACTIVITY_SHUTDOWN         2
+#define GUEST_ACTIVITY_WAIT_SIPI        3
+
 /*
  * Exit Qualifications for MOV for Control Register Access
  */
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 591e60104278..c8b4efad7ebb 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1406,6 +1406,16 @@ ENTRY(general_protection)
         CFI_ENDPROC
 END(general_protection)
 
+#ifdef CONFIG_KVM_GUEST
+ENTRY(async_page_fault)
+        RING0_EC_FRAME
+        pushl $do_async_page_fault
+        CFI_ADJUST_CFA_OFFSET 4
+        jmp error_code
+        CFI_ENDPROC
+END(apf_page_fault)
+#endif
+
 /*
  * End of kprobes section
  */
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index d3b895f375d3..aed1ffbeb0c9 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1329,6 +1329,9 @@ errorentry xen_stack_segment do_stack_segment
 #endif
 errorentry general_protection do_general_protection
 errorentry page_fault do_page_fault
+#ifdef CONFIG_KVM_GUEST
+errorentry async_page_fault do_async_page_fault
+#endif
 #ifdef CONFIG_X86_MCE
 paranoidzeroentry machine_check *machine_check_vector(%rip)
 #endif
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index 58bb239a2fd7..e60c38cc0eed 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -169,6 +169,7 @@ int init_fpu(struct task_struct *tsk)
         set_stopped_child_used_math(tsk);
         return 0;
 }
+EXPORT_SYMBOL_GPL(init_fpu);
 
 /*
  * The xstateregs_active() routine is the same as the fpregs_active() routine,
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 63b0ec8d3d4a..8dc44662394b 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -27,16 +27,37 @@
 #include <linux/mm.h>
 #include <linux/highmem.h>
 #include <linux/hardirq.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/hash.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/kprobes.h>
 #include <asm/timer.h>
+#include <asm/cpu.h>
+#include <asm/traps.h>
+#include <asm/desc.h>
+#include <asm/tlbflush.h>
 
 #define MMU_QUEUE_SIZE 1024
 
+static int kvmapf = 1;
+
+static int parse_no_kvmapf(char *arg)
+{
+        kvmapf = 0;
+        return 0;
+}
+
+early_param("no-kvmapf", parse_no_kvmapf);
+
 struct kvm_para_state {
         u8 mmu_queue[MMU_QUEUE_SIZE];
         int mmu_queue_len;
 };
 
 static DEFINE_PER_CPU(struct kvm_para_state, para_state);
+static DEFINE_PER_CPU(struct kvm_vcpu_pv_apf_data, apf_reason) __aligned(64);
 
 static struct kvm_para_state *kvm_para_state(void)
 {
@@ -50,6 +71,195 @@ static void kvm_io_delay(void)
 {
 }
 
+#define KVM_TASK_SLEEP_HASHBITS 8
+#define KVM_TASK_SLEEP_HASHSIZE (1<<KVM_TASK_SLEEP_HASHBITS)
+
+struct kvm_task_sleep_node {
+        struct hlist_node link;
+        wait_queue_head_t wq;
+        u32 token;
+        int cpu;
+        bool halted;
+        struct mm_struct *mm;
+};
+
+static struct kvm_task_sleep_head {
+        spinlock_t lock;
+        struct hlist_head list;
+} async_pf_sleepers[KVM_TASK_SLEEP_HASHSIZE];
+
+static struct kvm_task_sleep_node *_find_apf_task(struct kvm_task_sleep_head *b,
+                                                  u32 token)
+{
+        struct hlist_node *p;
+
+        hlist_for_each(p, &b->list) {
+                struct kvm_task_sleep_node *n =
+                        hlist_entry(p, typeof(*n), link);
+                if (n->token == token)
+                        return n;
+        }
+
+        return NULL;
+}
+
+void kvm_async_pf_task_wait(u32 token)
+{
+        u32 key = hash_32(token, KVM_TASK_SLEEP_HASHBITS);
+        struct kvm_task_sleep_head *b = &async_pf_sleepers[key];
+        struct kvm_task_sleep_node n, *e;
+        DEFINE_WAIT(wait);
+        int cpu, idle;
+
+        cpu = get_cpu();
+        idle = idle_cpu(cpu);
+        put_cpu();
+
+        spin_lock(&b->lock);
+        e = _find_apf_task(b, token);
+        if (e) {
+                /* dummy entry exist -> wake up was delivered ahead of PF */
+                hlist_del(&e->link);
+                kfree(e);
+                spin_unlock(&b->lock);
+                return;
+        }
+
+        n.token = token;
+        n.cpu = smp_processor_id();
+        n.mm = current->active_mm;
+        n.halted = idle || preempt_count() > 1;
+        atomic_inc(&n.mm->mm_count);
+        init_waitqueue_head(&n.wq);
+        hlist_add_head(&n.link, &b->list);
+        spin_unlock(&b->lock);
+
+        for (;;) {
+                if (!n.halted)
+                        prepare_to_wait(&n.wq, &wait, TASK_UNINTERRUPTIBLE);
+                if (hlist_unhashed(&n.link))
+                        break;
+
+                if (!n.halted) {
+                        local_irq_enable();
+                        schedule();
+                        local_irq_disable();
+                } else {
+                        /*
+                         * We cannot reschedule. So halt.
+                         */
+                        native_safe_halt();
+                        local_irq_disable();
+                }
+        }
+        if (!n.halted)
+                finish_wait(&n.wq, &wait);
+
+        return;
+}
+EXPORT_SYMBOL_GPL(kvm_async_pf_task_wait);
+
+static void apf_task_wake_one(struct kvm_task_sleep_node *n)
+{
+        hlist_del_init(&n->link);
+        if (!n->mm)
+                return;
+        mmdrop(n->mm);
+        if (n->halted)
+                smp_send_reschedule(n->cpu);
+        else if (waitqueue_active(&n->wq))
+                wake_up(&n->wq);
+}
+
+static void apf_task_wake_all(void)
+{
+        int i;
+
+        for (i = 0; i < KVM_TASK_SLEEP_HASHSIZE; i++) {
+                struct hlist_node *p, *next;
+                struct kvm_task_sleep_head *b = &async_pf_sleepers[i];
+                spin_lock(&b->lock);
+                hlist_for_each_safe(p, next, &b->list) {
+                        struct kvm_task_sleep_node *n =
+                                hlist_entry(p, typeof(*n), link);
+                        if (n->cpu == smp_processor_id())
+                                apf_task_wake_one(n);
+                }
+                spin_unlock(&b->lock);
+        }
+}
+
+void kvm_async_pf_task_wake(u32 token)
+{
+        u32 key = hash_32(token, KVM_TASK_SLEEP_HASHBITS);
+        struct kvm_task_sleep_head *b = &async_pf_sleepers[key];
+        struct kvm_task_sleep_node *n;
+
+        if (token == ~0) {
+                apf_task_wake_all();
+                return;
+        }
+
+again:
+        spin_lock(&b->lock);
+        n = _find_apf_task(b, token);
+        if (!n) {
+                /*
+                 * async PF was not yet handled.
+                 * Add dummy entry for the token.
+                 */
+                n = kmalloc(sizeof(*n), GFP_ATOMIC);
+                if (!n) {
+                        /*
+                         * Allocation failed! Busy wait while other cpu
+                         * handles async PF.
+                         */
+                        spin_unlock(&b->lock);
+                        cpu_relax();
+                        goto again;
+                }
+                n->token = token;
+                n->cpu = smp_processor_id();
+                n->mm = NULL;
+                init_waitqueue_head(&n->wq);
+                hlist_add_head(&n->link, &b->list);
+        } else
+                apf_task_wake_one(n);
+        spin_unlock(&b->lock);
+        return;
+}
+EXPORT_SYMBOL_GPL(kvm_async_pf_task_wake);
+
+u32 kvm_read_and_reset_pf_reason(void)
+{
+        u32 reason = 0;
+
+        if (__get_cpu_var(apf_reason).enabled) {
+                reason = __get_cpu_var(apf_reason).reason;
+                __get_cpu_var(apf_reason).reason = 0;
+        }
+
+        return reason;
+}
+EXPORT_SYMBOL_GPL(kvm_read_and_reset_pf_reason);
+
+dotraplinkage void __kprobes
+do_async_page_fault(struct pt_regs *regs, unsigned long error_code)
+{
+        switch (kvm_read_and_reset_pf_reason()) {
+        default:
+                do_page_fault(regs, error_code);
+                break;
+        case KVM_PV_REASON_PAGE_NOT_PRESENT:
+                /* page is swapped out by the host. */
+                kvm_async_pf_task_wait((u32)read_cr2());
+                break;
+        case KVM_PV_REASON_PAGE_READY:
+                kvm_async_pf_task_wake((u32)read_cr2());
+                break;
+        }
+}
+
 static void kvm_mmu_op(void *buffer, unsigned len)
 {
         int r;
@@ -231,10 +441,117 @@ static void __init paravirt_ops_setup(void)
 #endif
 }
 
+void __cpuinit kvm_guest_cpu_init(void)
+{
+        if (!kvm_para_available())
+                return;
+
+        if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF) && kvmapf) {
+                u64 pa = __pa(&__get_cpu_var(apf_reason));
+
+#ifdef CONFIG_PREEMPT
+                pa |= KVM_ASYNC_PF_SEND_ALWAYS;
+#endif
+                wrmsrl(MSR_KVM_ASYNC_PF_EN, pa | KVM_ASYNC_PF_ENABLED);
+                __get_cpu_var(apf_reason).enabled = 1;
+                printk(KERN_INFO"KVM setup async PF for cpu %d\n",
+                       smp_processor_id());
+        }
+}
+
+static void kvm_pv_disable_apf(void *unused)
+{
+        if (!__get_cpu_var(apf_reason).enabled)
+                return;
+
+        wrmsrl(MSR_KVM_ASYNC_PF_EN, 0);
+        __get_cpu_var(apf_reason).enabled = 0;
+
+        printk(KERN_INFO"Unregister pv shared memory for cpu %d\n",
+               smp_processor_id());
+}
+
+static int kvm_pv_reboot_notify(struct notifier_block *nb,
+                                unsigned long code, void *unused)
+{
+        if (code == SYS_RESTART)
+                on_each_cpu(kvm_pv_disable_apf, NULL, 1);
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block kvm_pv_reboot_nb = {
+        .notifier_call = kvm_pv_reboot_notify,
+};
+
+#ifdef CONFIG_SMP
+static void __init kvm_smp_prepare_boot_cpu(void)
+{
+#ifdef CONFIG_KVM_CLOCK
+        WARN_ON(kvm_register_clock("primary cpu clock"));
+#endif
+        kvm_guest_cpu_init();
+        native_smp_prepare_boot_cpu();
+}
+
+static void kvm_guest_cpu_online(void *dummy)
+{
+        kvm_guest_cpu_init();
+}
+
+static void kvm_guest_cpu_offline(void *dummy)
+{
+        kvm_pv_disable_apf(NULL);
+        apf_task_wake_all();
+}
+
+static int __cpuinit kvm_cpu_notify(struct notifier_block *self,
+                                    unsigned long action, void *hcpu)
+{
+        int cpu = (unsigned long)hcpu;
+        switch (action) {
+        case CPU_ONLINE:
+        case CPU_DOWN_FAILED:
+        case CPU_ONLINE_FROZEN:
+                smp_call_function_single(cpu, kvm_guest_cpu_online, NULL, 0);
+                break;
+        case CPU_DOWN_PREPARE:
+        case CPU_DOWN_PREPARE_FROZEN:
+                smp_call_function_single(cpu, kvm_guest_cpu_offline, NULL, 1);
+                break;
+        default:
+                break;
+        }
+        return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata kvm_cpu_notifier = {
+        .notifier_call  = kvm_cpu_notify,
+};
+#endif
+
+static void __init kvm_apf_trap_init(void)
+{
+        set_intr_gate(14, &async_page_fault);
+}
+
 void __init kvm_guest_init(void)
 {
+        int i;
+
         if (!kvm_para_available())
                 return;
 
         paravirt_ops_setup();
+        register_reboot_notifier(&kvm_pv_reboot_nb);
+        for (i = 0; i < KVM_TASK_SLEEP_HASHSIZE; i++)
+                spin_lock_init(&async_pf_sleepers[i].lock);
+        if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF))
+                x86_init.irqs.trap_init = kvm_apf_trap_init;
+
+#ifdef CONFIG_SMP
+        smp_ops.smp_prepare_boot_cpu = kvm_smp_prepare_boot_cpu;
+        register_cpu_notifier(&kvm_cpu_notifier);
+#else
+        kvm_guest_cpu_init();
+#endif
 }
diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index ca43ce31a19c..f98d3eafe07a 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -125,7 +125,7 @@ static struct clocksource kvm_clock = {
         .flags = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
-static int kvm_register_clock(char *txt)
+int kvm_register_clock(char *txt)
 {
         int cpu = smp_processor_id();
         int low, high, ret;
@@ -152,14 +152,6 @@ static void __cpuinit kvm_setup_secondary_clock(void)
 }
 #endif
 
-#ifdef CONFIG_SMP
-static void __init kvm_smp_prepare_boot_cpu(void)
-{
-        WARN_ON(kvm_register_clock("primary cpu clock"));
-        native_smp_prepare_boot_cpu();
-}
-#endif
-
 /*
  * After the clock is registered, the host will keep writing to the
  * registered memory location. If the guest happens to shutdown, this memory
@@ -206,9 +198,6 @@ void __init kvmclock_init(void)
         x86_cpuinit.setup_percpu_clockev =
                 kvm_setup_secondary_clock;
 #endif
-#ifdef CONFIG_SMP
-        smp_ops.smp_prepare_boot_cpu = kvm_smp_prepare_boot_cpu;
-#endif
         machine_ops.shutdown  = kvm_shutdown;
 #ifdef CONFIG_KEXEC
         machine_ops.crash_shutdown  = kvm_crash_shutdown;
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index ddc131ff438f..50f63648ce1b 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -28,6 +28,7 @@ config KVM
         select HAVE_KVM_IRQCHIP
         select HAVE_KVM_EVENTFD
         select KVM_APIC_ARCHITECTURE
+        select KVM_ASYNC_PF
         select USER_RETURN_NOTIFIER
         select KVM_MMIO
         ---help---
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 31a7035c4bd9..f15501f431c8 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -1,5 +1,5 @@
 
-EXTRA_CFLAGS += -Ivirt/kvm -Iarch/x86/kvm
+ccflags-y += -Ivirt/kvm -Iarch/x86/kvm
 
 CFLAGS_x86.o := -I.
 CFLAGS_svm.o := -I.
@@ -9,6 +9,7 @@ kvm-y			+= $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
                                 coalesced_mmio.o irq_comm.o eventfd.o \
                                 assigned-dev.o)
 kvm-$(CONFIG_IOMMU_API) += $(addprefix ../../../virt/kvm/, iommu.o)
+kvm-$(CONFIG_KVM_ASYNC_PF)      += $(addprefix ../../../virt/kvm/, async_pf.o)
 
 kvm-y                   += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
                            i8254.o timer.o
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 38b6e8dafaff..caf966781d25 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -20,16 +20,8 @@
  * From: xen-unstable 10676:af9809f51f81a3c43f276f00c81a52ef558afda4
  */
 
-#ifndef __KERNEL__
-#include <stdio.h>
-#include <stdint.h>
-#include <public/xen.h>
-#define DPRINTF(_f, _a ...) printf(_f , ## _a)
-#else
 #include <linux/kvm_host.h>
 #include "kvm_cache_regs.h"
-#define DPRINTF(x...) do {} while (0)
-#endif
 #include <linux/module.h>
 #include <asm/kvm_emulate.h>
 
@@ -418,9 +410,9 @@ address_mask(struct decode_cache *c, unsigned long reg)
 }
 
 static inline unsigned long
-register_address(struct decode_cache *c, unsigned long base, unsigned long reg)
+register_address(struct decode_cache *c, unsigned long reg)
 {
-        return base + address_mask(c, reg);
+        return address_mask(c, reg);
 }
 
 static inline void
@@ -452,60 +444,55 @@ static unsigned long seg_base(struct x86_emulate_ctxt *ctxt,
         return ops->get_cached_segment_base(seg, ctxt->vcpu);
 }
 
-static unsigned long seg_override_base(struct x86_emulate_ctxt *ctxt,
-                                       struct x86_emulate_ops *ops,
-                                       struct decode_cache *c)
+static unsigned seg_override(struct x86_emulate_ctxt *ctxt,
+                             struct x86_emulate_ops *ops,
+                             struct decode_cache *c)
 {
         if (!c->has_seg_override)
                 return 0;
 
-        return seg_base(ctxt, ops, c->seg_override);
+        return c->seg_override;
 }
 
-static unsigned long es_base(struct x86_emulate_ctxt *ctxt,
-                             struct x86_emulate_ops *ops)
+static ulong linear(struct x86_emulate_ctxt *ctxt,
+                    struct segmented_address addr)
 {
-        return seg_base(ctxt, ops, VCPU_SREG_ES);
-}
-
-static unsigned long ss_base(struct x86_emulate_ctxt *ctxt,
-                             struct x86_emulate_ops *ops)
-{
-        return seg_base(ctxt, ops, VCPU_SREG_SS);
-}
+        struct decode_cache *c = &ctxt->decode;
+        ulong la;
 
-static void emulate_exception(struct x86_emulate_ctxt *ctxt, int vec,
-                                      u32 error, bool valid)
-{
-        ctxt->exception = vec;
-        ctxt->error_code = error;
-        ctxt->error_code_valid = valid;
+        la = seg_base(ctxt, ctxt->ops, addr.seg) + addr.ea;
+        if (c->ad_bytes != 8)
+                la &= (u32)-1;
+        return la;
 }
 
-static void emulate_gp(struct x86_emulate_ctxt *ctxt, int err)
+static int emulate_exception(struct x86_emulate_ctxt *ctxt, int vec,
+                             u32 error, bool valid)
 {
-        emulate_exception(ctxt, GP_VECTOR, err, true);
+        ctxt->exception.vector = vec;
+        ctxt->exception.error_code = error;
+        ctxt->exception.error_code_valid = valid;
+        return X86EMUL_PROPAGATE_FAULT;
 }
 
-static void emulate_pf(struct x86_emulate_ctxt *ctxt)
+static int emulate_gp(struct x86_emulate_ctxt *ctxt, int err)
 {
-        emulate_exception(ctxt, PF_VECTOR, 0, true);
+        return emulate_exception(ctxt, GP_VECTOR, err, true);
 }
 
-static void emulate_ud(struct x86_emulate_ctxt *ctxt)
+static int emulate_ud(struct x86_emulate_ctxt *ctxt)
 {
-        emulate_exception(ctxt, UD_VECTOR, 0, false);
+        return emulate_exception(ctxt, UD_VECTOR, 0, false);
 }
 
-static void emulate_ts(struct x86_emulate_ctxt *ctxt, int err)
+static int emulate_ts(struct x86_emulate_ctxt *ctxt, int err)
 {
-        emulate_exception(ctxt, TS_VECTOR, err, true);
+        return emulate_exception(ctxt, TS_VECTOR, err, true);
 }
 
 static int emulate_de(struct x86_emulate_ctxt *ctxt)
 {
-        emulate_exception(ctxt, DE_VECTOR, 0, false);
-        return X86EMUL_PROPAGATE_FAULT;
+        return emulate_exception(ctxt, DE_VECTOR, 0, false);
 }
 
 static int do_fetch_insn_byte(struct x86_emulate_ctxt *ctxt,
@@ -520,7 +507,7 @@ static int do_fetch_insn_byte(struct x86_emulate_ctxt *ctxt,
                 cur_size = fc->end - fc->start;
                 size = min(15UL - cur_size, PAGE_SIZE - offset_in_page(eip));
                 rc = ops->fetch(ctxt->cs_base + eip, fc->data + cur_size,
-                                size, ctxt->vcpu, NULL);
+                                size, ctxt->vcpu, &ctxt->exception);
                 if (rc != X86EMUL_CONTINUE)
                         return rc;
                 fc->end += size;
@@ -564,7 +551,7 @@ static void *decode_register(u8 modrm_reg, unsigned long *regs,
 
 static int read_descriptor(struct x86_emulate_ctxt *ctxt,
                            struct x86_emulate_ops *ops,
-                           ulong addr,
+                           struct segmented_address addr,
                            u16 *size, unsigned long *address, int op_bytes)
 {
         int rc;
@@ -572,10 +559,13 @@ static int read_descriptor(struct x86_emulate_ctxt *ctxt,
         if (op_bytes == 2)
                 op_bytes = 3;
         *address = 0;
-        rc = ops->read_std(addr, (unsigned long *)size, 2, ctxt->vcpu, NULL);
+        rc = ops->read_std(linear(ctxt, addr), (unsigned long *)size, 2,
+                           ctxt->vcpu, &ctxt->exception);
         if (rc != X86EMUL_CONTINUE)
                 return rc;
-        rc = ops->read_std(addr + 2, address, op_bytes, ctxt->vcpu, NULL);
+        addr.ea += 2;
+        rc = ops->read_std(linear(ctxt, addr), address, op_bytes,
+                           ctxt->vcpu, &ctxt->exception);
         return rc;
 }
 
@@ -768,7 +758,7 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
                         break;
                 }
         }
-        op->addr.mem = modrm_ea;
+        op->addr.mem.ea = modrm_ea;
 done:
         return rc;
 }
@@ -783,13 +773,13 @@ static int decode_abs(struct x86_emulate_ctxt *ctxt,
         op->type = OP_MEM;
         switch (c->ad_bytes) {
         case 2:
-                op->addr.mem = insn_fetch(u16, 2, c->eip);
+                op->addr.mem.ea = insn_fetch(u16, 2, c->eip);
                 break;
         case 4:
-                op->addr.mem = insn_fetch(u32, 4, c->eip);
+                op->addr.mem.ea = insn_fetch(u32, 4, c->eip);
                 break;
         case 8:
-                op->addr.mem = insn_fetch(u64, 8, c->eip);
+                op->addr.mem.ea = insn_fetch(u64, 8, c->eip);
                 break;
         }
 done:
@@ -808,7 +798,7 @@ static void fetch_bit_operand(struct decode_cache *c)
                 else if (c->src.bytes == 4)
                         sv = (s32)c->src.val & (s32)mask;
 
-                c->dst.addr.mem += (sv >> 3);
+                c->dst.addr.mem.ea += (sv >> 3);
         }
 
         /* only subword offset */
@@ -821,7 +811,6 @@ static int read_emulated(struct x86_emulate_ctxt *ctxt,
 {
         int rc;
         struct read_cache *mc = &ctxt->decode.mem_read;
-        u32 err;
 
         while (size) {
                 int n = min(size, 8u);
@@ -829,10 +818,8 @@ static int read_emulated(struct x86_emulate_ctxt *ctxt,
                 if (mc->pos < mc->end)
                         goto read_cached;
 
-                rc = ops->read_emulated(addr, mc->data + mc->end, n, &err,
-                                        ctxt->vcpu);
-                if (rc == X86EMUL_PROPAGATE_FAULT)
-                        emulate_pf(ctxt);
+                rc = ops->read_emulated(addr, mc->data + mc->end, n,
+                                        &ctxt->exception, ctxt->vcpu);
                 if (rc != X86EMUL_CONTINUE)
                         return rc;
                 mc->end += n;
@@ -907,19 +894,15 @@ static int read_segment_descriptor(struct x86_emulate_ctxt *ctxt,
         struct desc_ptr dt;
         u16 index = selector >> 3;
         int ret;
-        u32 err;
         ulong addr;
 
         get_descriptor_table_ptr(ctxt, ops, selector, &dt);
 
-        if (dt.size < index * 8 + 7) {
-                emulate_gp(ctxt, selector & 0xfffc);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (dt.size < index * 8 + 7)
+                return emulate_gp(ctxt, selector & 0xfffc);
         addr = dt.address + index * 8;
-        ret = ops->read_std(addr, desc, sizeof *desc, ctxt->vcpu,  &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT)
-                emulate_pf(ctxt);
+        ret = ops->read_std(addr, desc, sizeof *desc, ctxt->vcpu,
+                            &ctxt->exception);
 
        return ret;
 }
@@ -931,21 +914,17 @@ static int write_segment_descriptor(struct x86_emulate_ctxt *ctxt,
 {
         struct desc_ptr dt;
         u16 index = selector >> 3;
-        u32 err;
         ulong addr;
         int ret;
 
         get_descriptor_table_ptr(ctxt, ops, selector, &dt);
 
-        if (dt.size < index * 8 + 7) {
-                emulate_gp(ctxt, selector & 0xfffc);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (dt.size < index * 8 + 7)
+                return emulate_gp(ctxt, selector & 0xfffc);
 
         addr = dt.address + index * 8;
-        ret = ops->write_std(addr, desc, sizeof *desc, ctxt->vcpu, &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT)
-                emulate_pf(ctxt);
+        ret = ops->write_std(addr, desc, sizeof *desc, ctxt->vcpu,
+                             &ctxt->exception);
 
         return ret;
 }
@@ -1092,7 +1071,6 @@ static inline int writeback(struct x86_emulate_ctxt *ctxt,
 {
         int rc;
         struct decode_cache *c = &ctxt->decode;
-        u32 err;
 
         switch (c->dst.type) {
         case OP_REG:
@@ -1101,21 +1079,19 @@ static inline int writeback(struct x86_emulate_ctxt *ctxt,
         case OP_MEM:
                 if (c->lock_prefix)
                         rc = ops->cmpxchg_emulated(
-                                        c->dst.addr.mem,
+                                        linear(ctxt, c->dst.addr.mem),
                                         &c->dst.orig_val,
                                         &c->dst.val,
                                         c->dst.bytes,
-                                        &err,
+                                        &ctxt->exception,
                                         ctxt->vcpu);
                 else
                         rc = ops->write_emulated(
-                                        c->dst.addr.mem,
+                                        linear(ctxt, c->dst.addr.mem),
                                         &c->dst.val,
                                         c->dst.bytes,
-                                        &err,
+                                        &ctxt->exception,
                                         ctxt->vcpu);
-                if (rc == X86EMUL_PROPAGATE_FAULT)
-                        emulate_pf(ctxt);
                 if (rc != X86EMUL_CONTINUE)
                         return rc;
                 break;
@@ -1137,8 +1113,8 @@ static inline void emulate_push(struct x86_emulate_ctxt *ctxt,
         c->dst.bytes = c->op_bytes;
         c->dst.val = c->src.val;
         register_address_increment(c, &c->regs[VCPU_REGS_RSP], -c->op_bytes);
-        c->dst.addr.mem = register_address(c, ss_base(ctxt, ops),
-                                           c->regs[VCPU_REGS_RSP]);
+        c->dst.addr.mem.ea = register_address(c, c->regs[VCPU_REGS_RSP]);
+        c->dst.addr.mem.seg = VCPU_SREG_SS;
 }
 
 static int emulate_pop(struct x86_emulate_ctxt *ctxt,
@@ -1147,10 +1123,11 @@ static int emulate_pop(struct x86_emulate_ctxt *ctxt,
 {
         struct decode_cache *c = &ctxt->decode;
         int rc;
+        struct segmented_address addr;
 
-        rc = read_emulated(ctxt, ops, register_address(c, ss_base(ctxt, ops),
-                                                       c->regs[VCPU_REGS_RSP]),
-                           dest, len);
+        addr.ea = register_address(c, c->regs[VCPU_REGS_RSP]);
+        addr.seg = VCPU_SREG_SS;
+        rc = read_emulated(ctxt, ops, linear(ctxt, addr), dest, len);
         if (rc != X86EMUL_CONTINUE)
                 return rc;
 
@@ -1184,10 +1161,8 @@ static int emulate_popf(struct x86_emulate_ctxt *ctxt,
                         change_mask |= EFLG_IF;
                 break;
         case X86EMUL_MODE_VM86:
-                if (iopl < 3) {
-                        emulate_gp(ctxt, 0);
-                        return X86EMUL_PROPAGATE_FAULT;
-                }
+                if (iopl < 3)
+                        return emulate_gp(ctxt, 0);
                 change_mask |= EFLG_IF;
                 break;
         default: /* real mode */
@@ -1198,9 +1173,6 @@ static int emulate_popf(struct x86_emulate_ctxt *ctxt,
         *(unsigned long *)dest =
                 (ctxt->eflags & ~change_mask) | (val & change_mask);
 
-        if (rc == X86EMUL_PROPAGATE_FAULT)
-                emulate_pf(ctxt);
-
         return rc;
 }
 
@@ -1287,7 +1259,6 @@ int emulate_int_real(struct x86_emulate_ctxt *ctxt,
         gva_t cs_addr;
         gva_t eip_addr;
         u16 cs, eip;
-        u32 err;
 
         /* TODO: Add limit checks */
         c->src.val = ctxt->eflags;
@@ -1317,11 +1288,11 @@ int emulate_int_real(struct x86_emulate_ctxt *ctxt,
         eip_addr = dt.address + (irq << 2);
         cs_addr = dt.address + (irq << 2) + 2;
 
-        rc = ops->read_std(cs_addr, &cs, 2, ctxt->vcpu, &err);
+        rc = ops->read_std(cs_addr, &cs, 2, ctxt->vcpu, &ctxt->exception);
         if (rc != X86EMUL_CONTINUE)
                 return rc;
 
-        rc = ops->read_std(eip_addr, &eip, 2, ctxt->vcpu, &err);
+        rc = ops->read_std(eip_addr, &eip, 2, ctxt->vcpu, &ctxt->exception);
         if (rc != X86EMUL_CONTINUE)
                 return rc;
 
@@ -1370,10 +1341,8 @@ static int emulate_iret_real(struct x86_emulate_ctxt *ctxt,
         if (rc != X86EMUL_CONTINUE)
                 return rc;
 
-        if (temp_eip & ~0xffff) {
-                emulate_gp(ctxt, 0);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (temp_eip & ~0xffff)
+                return emulate_gp(ctxt, 0);
 
         rc = emulate_pop(ctxt, ops, &cs, c->op_bytes);
 
@@ -1624,10 +1593,8 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
 
         /* syscall is not available in real mode */
         if (ctxt->mode == X86EMUL_MODE_REAL ||
-            ctxt->mode == X86EMUL_MODE_VM86) {
-                emulate_ud(ctxt);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+            ctxt->mode == X86EMUL_MODE_VM86)
+                return emulate_ud(ctxt);
 
         setup_syscalls_segments(ctxt, ops, &cs, &ss);
 
@@ -1678,34 +1645,26 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         u16 cs_sel, ss_sel;
 
         /* inject #GP if in real mode */
-        if (ctxt->mode == X86EMUL_MODE_REAL) {
-                emulate_gp(ctxt, 0);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (ctxt->mode == X86EMUL_MODE_REAL)
+                return emulate_gp(ctxt, 0);
 
         /* XXX sysenter/sysexit have not been tested in 64bit mode.
         * Therefore, we inject an #UD.
         */
-        if (ctxt->mode == X86EMUL_MODE_PROT64) {
-                emulate_ud(ctxt);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (ctxt->mode == X86EMUL_MODE_PROT64)
+                return emulate_ud(ctxt);
 
         setup_syscalls_segments(ctxt, ops, &cs, &ss);
 
         ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data);
         switch (ctxt->mode) {
         case X86EMUL_MODE_PROT32:
-                if ((msr_data & 0xfffc) == 0x0) {
-                        emulate_gp(ctxt, 0);
-                        return X86EMUL_PROPAGATE_FAULT;
-                }
+                if ((msr_data & 0xfffc) == 0x0)
+                        return emulate_gp(ctxt, 0);
                 break;
         case X86EMUL_MODE_PROT64:
-                if (msr_data == 0x0) {
-                        emulate_gp(ctxt, 0);
-                        return X86EMUL_PROPAGATE_FAULT;
-                }
+                if (msr_data == 0x0)
+                        return emulate_gp(ctxt, 0);
                 break;
         }
 
@@ -1745,10 +1704,8 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
 
         /* inject #GP if in real mode or Virtual 8086 mode */
         if (ctxt->mode == X86EMUL_MODE_REAL ||
-            ctxt->mode == X86EMUL_MODE_VM86) {
-                emulate_gp(ctxt, 0);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+            ctxt->mode == X86EMUL_MODE_VM86)
+                return emulate_gp(ctxt, 0);
 
         setup_syscalls_segments(ctxt, ops, &cs, &ss);
 
@@ -1763,18 +1720,14 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         switch (usermode) {
         case X86EMUL_MODE_PROT32:
                 cs_sel = (u16)(msr_data + 16);
-                if ((msr_data & 0xfffc) == 0x0) {
-                        emulate_gp(ctxt, 0);
-                        return X86EMUL_PROPAGATE_FAULT;
-                }
+                if ((msr_data & 0xfffc) == 0x0)
+                        return emulate_gp(ctxt, 0);
                 ss_sel = (u16)(msr_data + 24);
                 break;
         case X86EMUL_MODE_PROT64:
                 cs_sel = (u16)(msr_data + 32);
-                if (msr_data == 0x0) {
-                        emulate_gp(ctxt, 0);
-                        return X86EMUL_PROPAGATE_FAULT;
-                }
+                if (msr_data == 0x0)
+                        return emulate_gp(ctxt, 0);
                 ss_sel = cs_sel + 8;
                 cs.d = 0;
                 cs.l = 1;
@@ -1934,33 +1887,27 @@ static int task_switch_16(struct x86_emulate_ctxt *ctxt,
 {
         struct tss_segment_16 tss_seg;
         int ret;
-        u32 err, new_tss_base = get_desc_base(new_desc);
+        u32 new_tss_base = get_desc_base(new_desc);
 
         ret = ops->read_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
-                            &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT) {
+                            &ctxt->exception);
+        if (ret != X86EMUL_CONTINUE)
                 /* FIXME: need to provide precise fault address */
-                emulate_pf(ctxt);
                 return ret;
-        }
 
         save_state_to_tss16(ctxt, ops, &tss_seg);
 
         ret = ops->write_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
-                             &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT) {
+                             &ctxt->exception);
+        if (ret != X86EMUL_CONTINUE)
                 /* FIXME: need to provide precise fault address */
-                emulate_pf(ctxt);
                 return ret;
-        }
 
         ret = ops->read_std(new_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
-                            &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT) {
+                            &ctxt->exception);
+        if (ret != X86EMUL_CONTINUE)
                 /* FIXME: need to provide precise fault address */
-                emulate_pf(ctxt);
                 return ret;
-        }
 
         if (old_tss_sel != 0xffff) {
                 tss_seg.prev_task_link = old_tss_sel;
@@ -1968,12 +1915,10 @@ static int task_switch_16(struct x86_emulate_ctxt *ctxt,
                 ret = ops->write_std(new_tss_base,
                                      &tss_seg.prev_task_link,
                                      sizeof tss_seg.prev_task_link,
-                                     ctxt->vcpu, &err);
-                if (ret == X86EMUL_PROPAGATE_FAULT) {
+                                     ctxt->vcpu, &ctxt->exception);
+                if (ret != X86EMUL_CONTINUE)
                         /* FIXME: need to provide precise fault address */
-                        emulate_pf(ctxt);
                         return ret;
-                }
         }
 
         return load_state_from_tss16(ctxt, ops, &tss_seg);
@@ -2013,10 +1958,8 @@ static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt,
         struct decode_cache *c = &ctxt->decode;
         int ret;
 
-        if (ops->set_cr(3, tss->cr3, ctxt->vcpu)) {
-                emulate_gp(ctxt, 0);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (ops->set_cr(3, tss->cr3, ctxt->vcpu))
+                return emulate_gp(ctxt, 0);
         c->eip = tss->eip;
         ctxt->eflags = tss->eflags | 2;
         c->regs[VCPU_REGS_RAX] = tss->eax;
@@ -2076,33 +2019,27 @@ static int task_switch_32(struct x86_emulate_ctxt *ctxt,
 {
         struct tss_segment_32 tss_seg;
         int ret;
-        u32 err, new_tss_base = get_desc_base(new_desc);
+        u32 new_tss_base = get_desc_base(new_desc);
 
         ret = ops->read_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
-                            &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT) {
+                            &ctxt->exception);
+        if (ret != X86EMUL_CONTINUE)
                 /* FIXME: need to provide precise fault address */
-                emulate_pf(ctxt);
                 return ret;
-        }
 
         save_state_to_tss32(ctxt, ops, &tss_seg);
 
         ret = ops->write_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
-                             &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT) {
+                             &ctxt->exception);
+        if (ret != X86EMUL_CONTINUE)
                 /* FIXME: need to provide precise fault address */
-                emulate_pf(ctxt);
                 return ret;
-        }
 
         ret = ops->read_std(new_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
-                            &err);
-        if (ret == X86EMUL_PROPAGATE_FAULT) {
+                            &ctxt->exception);
+        if (ret != X86EMUL_CONTINUE)
                 /* FIXME: need to provide precise fault address */
-                emulate_pf(ctxt);
                 return ret;
-        }
 
         if (old_tss_sel != 0xffff) {
                 tss_seg.prev_task_link = old_tss_sel;
@@ -2110,12 +2047,10 @@ static int task_switch_32(struct x86_emulate_ctxt *ctxt,
                 ret = ops->write_std(new_tss_base,
                                      &tss_seg.prev_task_link,
                                      sizeof tss_seg.prev_task_link,
-                                     ctxt->vcpu, &err);
-                if (ret == X86EMUL_PROPAGATE_FAULT) {
+                                     ctxt->vcpu, &ctxt->exception);
+                if (ret != X86EMUL_CONTINUE)
                         /* FIXME: need to provide precise fault address */
-                        emulate_pf(ctxt);
                         return ret;
-                }
         }
 
         return load_state_from_tss32(ctxt, ops, &tss_seg);
@@ -2146,10 +2081,8 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt,
 
         if (reason != TASK_SWITCH_IRET) {
                 if ((tss_selector & 3) > next_tss_desc.dpl ||
-                    ops->cpl(ctxt->vcpu) > next_tss_desc.dpl) {
-                        emulate_gp(ctxt, 0);
-                        return X86EMUL_PROPAGATE_FAULT;
-                }
+                    ops->cpl(ctxt->vcpu) > next_tss_desc.dpl)
+                        return emulate_gp(ctxt, 0);
         }
 
         desc_limit = desc_limit_scaled(&next_tss_desc);
@@ -2231,14 +2164,15 @@ int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
         return (rc == X86EMUL_UNHANDLEABLE) ? -1 : 0;
 }
 
-static void string_addr_inc(struct x86_emulate_ctxt *ctxt, unsigned long base,
+static void string_addr_inc(struct x86_emulate_ctxt *ctxt, unsigned seg,
                             int reg, struct operand *op)
 {
         struct decode_cache *c = &ctxt->decode;
         int df = (ctxt->eflags & EFLG_DF) ? -1 : 1;
 
         register_address_increment(c, &c->regs[reg], df * op->bytes);
-        op->addr.mem = register_address(c,  base, c->regs[reg]);
+        op->addr.mem.ea = register_address(c, c->regs[reg]);
+        op->addr.mem.seg = seg;
 }
 
 static int em_push(struct x86_emulate_ctxt *ctxt)
@@ -2369,10 +2303,8 @@ static int em_rdtsc(struct x86_emulate_ctxt *ctxt)
         struct decode_cache *c = &ctxt->decode;
         u64 tsc = 0;
 
-        if (cpl > 0 && (ctxt->ops->get_cr(4, ctxt->vcpu) & X86_CR4_TSD)) {
-                emulate_gp(ctxt, 0);
-                return X86EMUL_PROPAGATE_FAULT;
-        }
+        if (cpl > 0 && (ctxt->ops->get_cr(4, ctxt->vcpu) & X86_CR4_TSD))
+                return emulate_gp(ctxt, 0);
         ctxt->ops->get_msr(ctxt->vcpu, MSR_IA32_TSC, &tsc);
         c->regs[VCPU_REGS_RAX] = (u32)tsc;
         c->regs[VCPU_REGS_RDX] = tsc >> 32;
@@ -2647,7 +2579,7 @@ static int decode_imm(struct x86_emulate_ctxt *ctxt, struct operand *op,
 
         op->type = OP_IMM;
         op->bytes = size;
-        op->addr.mem = c->eip;
+        op->addr.mem.ea = c->eip;
         /* NB. Immediates are sign-extended as necessary. */
         switch (op->bytes) {
         case 1:
@@ -2678,7 +2610,7 @@ done:
 }
 
 int
-x86_decode_insn(struct x86_emulate_ctxt *ctxt)
+x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
 {
         struct x86_emulate_ops *ops = ctxt->ops;
         struct decode_cache *c = &ctxt->decode;
@@ -2689,7 +2621,10 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt)
         struct operand memop = { .type = OP_NONE };
 
         c->eip = ctxt->eip;
-        c->fetch.start = c->fetch.end = c->eip;
+        c->fetch.start = c->eip;
+        c->fetch.end = c->fetch.start + insn_len;
+        if (insn_len > 0)
+                memcpy(c->fetch.data, insn, insn_len);
         ctxt->cs_base = seg_base(ctxt, ops, VCPU_SREG_CS);
 
         switch (mode) {
@@ -2803,10 +2738,8 @@ done_prefixes:
         c->execute = opcode.u.execute;
 
         /* Unrecognised? */
-        if (c->d == 0 || (c->d & Undefined)) {
-                DPRINTF("Cannot emulate %02x\n", c->b);
+        if (c->d == 0 || (c->d & Undefined))
                 return -1;
-        }
 
         if (mode == X86EMUL_MODE_PROT64 && (c->d & Stack))
                 c->op_bytes = 8;
@@ -2831,14 +2764,13 @@ done_prefixes:
         if (!c->has_seg_override)
                 set_seg_override(c, VCPU_SREG_DS);
 
-        if (memop.type == OP_MEM && !(!c->twobyte && c->b == 0x8d))
-                memop.addr.mem += seg_override_base(ctxt, ops, c);
+        memop.addr.mem.seg = seg_override(ctxt, ops, c);
 
         if (memop.type == OP_MEM && c->ad_bytes != 8)
-                memop.addr.mem = (u32)memop.addr.mem;
+                memop.addr.mem.ea = (u32)memop.addr.mem.ea;
 
         if (memop.type == OP_MEM && c->rip_relative)
-                memop.addr.mem += c->eip;
+                memop.addr.mem.ea += c->eip;
 
         /*
          * Decode and fetch the source operand: register, memory
@@ -2890,14 +2822,14 @@ done_prefixes:
         case SrcSI:
                 c->src.type = OP_MEM;
                 c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
-                c->src.addr.mem =
-                        register_address(c,  seg_override_base(ctxt, ops, c),
-                                         c->regs[VCPU_REGS_RSI]);
+                c->src.addr.mem.ea =
+                        register_address(c, c->regs[VCPU_REGS_RSI]);
+                c->src.addr.mem.seg = seg_override(ctxt, ops, c),
                 c->src.val = 0;
                 break;
         case SrcImmFAddr:
                 c->src.type = OP_IMM;
-                c->src.addr.mem = c->eip;
+                c->src.addr.mem.ea = c->eip;
                 c->src.bytes = c->op_bytes + 2;
                 insn_fetch_arr(c->src.valptr, c->src.bytes, c->eip);
                 break;
@@ -2944,7 +2876,7 @@ done_prefixes:
                 break;
         case DstImmUByte:
                 c->dst.type = OP_IMM;
-                c->dst.addr.mem = c->eip;
+                c->dst.addr.mem.ea = c->eip;
                 c->dst.bytes = 1;
                 c->dst.val = insn_fetch(u8, 1, c->eip);
                 break;
@@ -2969,9 +2901,9 @@ done_prefixes:
         case DstDI:
                 c->dst.type = OP_MEM;
                 c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
-                c->dst.addr.mem =
-                        register_address(c, es_base(ctxt, ops),
-                                         c->regs[VCPU_REGS_RDI]);
+                c->dst.addr.mem.ea =
+                        register_address(c, c->regs[VCPU_REGS_RDI]);
+                c->dst.addr.mem.seg = VCPU_SREG_ES;
                 c->dst.val = 0;
                 break;
         case ImplicitOps:
@@ -3020,24 +2952,24 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
         ctxt->decode.mem_read.pos = 0;
 
         if (ctxt->mode == X86EMUL_MODE_PROT64 && (c->d & No64)) {
-                emulate_ud(ctxt);
+                rc = emulate_ud(ctxt);
                 goto done;
         }
 
         /* LOCK prefix is allowed only with some instructions */
         if (c->lock_prefix && (!(c->d & Lock) || c->dst.type != OP_MEM)) {
-                emulate_ud(ctxt);
+                rc = emulate_ud(ctxt);
                 goto done;
         }
 
         if ((c->d & SrcMask) == SrcMemFAddr && c->src.type != OP_MEM) {
-                emulate_ud(ctxt);
+                rc = emulate_ud(ctxt);
                 goto done;
         }
 
         /* Privileged instruction can be executed only in CPL=0 */
         if ((c->d & Priv) && ops->cpl(ctxt->vcpu)) {
-                emulate_gp(ctxt, 0);
+                rc = emulate_gp(ctxt, 0);
                 goto done;
         }
 
@@ -3050,7 +2982,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
         }
 
         if ((c->src.type == OP_MEM) && !(c->d & NoAccess)) {
-                rc = read_emulated(ctxt, ops, c->src.addr.mem,
+                rc = read_emulated(ctxt, ops, linear(ctxt, c->src.addr.mem),
                                         c->src.valptr, c->src.bytes);
                 if (rc != X86EMUL_CONTINUE)
                         goto done;
@@ -3058,7 +2990,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
         }
 
         if (c->src2.type == OP_MEM) {
-                rc = read_emulated(ctxt, ops, c->src2.addr.mem,
+                rc = read_emulated(ctxt, ops, linear(ctxt, c->src2.addr.mem),
                                         &c->src2.val, c->src2.bytes);
                 if (rc != X86EMUL_CONTINUE)
                         goto done;
@@ -3070,7 +3002,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
         if ((c->dst.type == OP_MEM) && !(c->d & Mov)) {
                 /* optimisation - avoid slow emulated read if Mov */
-                rc = read_emulated(ctxt, ops, c->dst.addr.mem,
+                rc = read_emulated(ctxt, ops, linear(ctxt, c->dst.addr.mem),
                                    &c->dst.val, c->dst.bytes);
                 if (rc != X86EMUL_CONTINUE)
                         goto done;
@@ -3215,13 +3147,13 @@ special_insn:
                 break;
         case 0x8c:  /* mov r/m, sreg */
                 if (c->modrm_reg > VCPU_SREG_GS) {
-                        emulate_ud(ctxt);
+                        rc = emulate_ud(ctxt);
                         goto done;
                 }
                 c->dst.val = ops->get_segment_selector(c->modrm_reg, ctxt->vcpu);
                 break;
         case 0x8d: /* lea r16/r32, m */
-                c->dst.val = c->src.addr.mem;
+                c->dst.val = c->src.addr.mem.ea;
                 break;
         case 0x8e: { /* mov seg, r/m16 */
                 uint16_t sel;
@@ -3230,7 +3162,7 @@ special_insn:
 
                 if (c->modrm_reg == VCPU_SREG_CS ||
                     c->modrm_reg > VCPU_SREG_GS) {
-                        emulate_ud(ctxt);
+                        rc = emulate_ud(ctxt);
                         goto done;
                 }
 
@@ -3268,7 +3200,6 @@ special_insn:
                 break;
         case 0xa6 ... 0xa7:     /* cmps */
                 c->dst.type = OP_NONE; /* Disable writeback. */
-                DPRINTF("cmps: mem1=0x%p mem2=0x%p\n", c->src.addr.mem, c->dst.addr.mem);
                 goto cmp;
         case 0xa8 ... 0xa9:     /* test ax, imm */
                 goto test;
@@ -3363,7 +3294,7 @@ special_insn:
         do_io_in:
                 c->dst.bytes = min(c->dst.bytes, 4u);
                 if (!emulator_io_permited(ctxt, ops, c->src.val, c->dst.bytes)) {
-                        emulate_gp(ctxt, 0);
+                        rc = emulate_gp(ctxt, 0);
                         goto done;
                 }
                 if (!pio_in_emulated(ctxt, ops, c->dst.bytes, c->src.val,
@@ -3377,7 +3308,7 @@ special_insn:
                 c->src.bytes = min(c->src.bytes, 4u);
                 if (!emulator_io_permited(ctxt, ops, c->dst.val,
                                           c->src.bytes)) {
-                        emulate_gp(ctxt, 0);
+                        rc = emulate_gp(ctxt, 0);
                         goto done;
                 }
                 ops->pio_out_emulated(c->src.bytes, c->dst.val,
@@ -3402,14 +3333,14 @@ special_insn:
                 break;
         case 0xfa: /* cli */
                 if (emulator_bad_iopl(ctxt, ops)) {
-                        emulate_gp(ctxt, 0);
+                        rc = emulate_gp(ctxt, 0);
                         goto done;
                 } else
                         ctxt->eflags &= ~X86_EFLAGS_IF;
                 break;
         case 0xfb: /* sti */
                 if (emulator_bad_iopl(ctxt, ops)) {
-                        emulate_gp(ctxt, 0);
+                        rc = emulate_gp(ctxt, 0);
                         goto done;
                 } else {
                         ctxt->interruptibility = KVM_X86_SHADOW_INT_STI;
@@ -3449,11 +3380,11 @@ writeback:
         c->dst.type = saved_dst_type;
 
         if ((c->d & SrcMask) == SrcSI)
-                string_addr_inc(ctxt, seg_override_base(ctxt, ops, c),
+                string_addr_inc(ctxt, seg_override(ctxt, ops, c),
                                 VCPU_REGS_RSI, &c->src);
 
         if ((c->d & DstMask) == DstDI)
-                string_addr_inc(ctxt, es_base(ctxt, ops), VCPU_REGS_RDI,
+                string_addr_inc(ctxt, VCPU_SREG_ES, VCPU_REGS_RDI,
                                 &c->dst);
 
         if (c->rep_prefix && (c->d & String)) {
@@ -3482,6 +3413,8 @@ writeback:
         ctxt->eip = c->eip;
 
 done:
+        if (rc == X86EMUL_PROPAGATE_FAULT)
+                ctxt->have_exception = true;
         return (rc == X86EMUL_UNHANDLEABLE) ? EMULATION_FAILED : EMULATION_OK;
 
 twobyte_insn:
@@ -3544,9 +3477,11 @@ twobyte_insn:
                         break;
                 case 5: /* not defined */
                         emulate_ud(ctxt);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 case 7: /* invlpg*/
-                        emulate_invlpg(ctxt->vcpu, c->src.addr.mem);
+                        emulate_invlpg(ctxt->vcpu,
+                                       linear(ctxt, c->src.addr.mem));
                         /* Disable writeback. */
                         c->dst.type = OP_NONE;
                         break;
@@ -3573,6 +3508,7 @@ twobyte_insn:
                 case 5 ... 7:
                 case 9 ... 15:
                         emulate_ud(ctxt);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 }
                 c->dst.val = ops->get_cr(c->modrm_reg, ctxt->vcpu);
@@ -3581,6 +3517,7 @@ twobyte_insn:
                 if ((ops->get_cr(4, ctxt->vcpu) & X86_CR4_DE) &&
                     (c->modrm_reg == 4 || c->modrm_reg == 5)) {
                         emulate_ud(ctxt);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 }
                 ops->get_dr(c->modrm_reg, &c->dst.val, ctxt->vcpu);
@@ -3588,6 +3525,7 @@ twobyte_insn:
         case 0x22: /* mov reg, cr */
                 if (ops->set_cr(c->modrm_reg, c->src.val, ctxt->vcpu)) {
                         emulate_gp(ctxt, 0);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 }
                 c->dst.type = OP_NONE;
@@ -3596,6 +3534,7 @@ twobyte_insn:
                 if ((ops->get_cr(4, ctxt->vcpu) & X86_CR4_DE) &&
                     (c->modrm_reg == 4 || c->modrm_reg == 5)) {
                         emulate_ud(ctxt);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 }
 
@@ -3604,6 +3543,7 @@ twobyte_insn:
                                  ~0ULL : ~0U), ctxt->vcpu) < 0) {
                         /* #UD condition is already handled by the code above */
                         emulate_gp(ctxt, 0);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 }
 
@@ -3615,6 +3555,7 @@ twobyte_insn:
                         | ((u64)c->regs[VCPU_REGS_RDX] << 32);
                 if (ops->set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data)) {
                         emulate_gp(ctxt, 0);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 }
                 rc = X86EMUL_CONTINUE;
@@ -3623,6 +3564,7 @@ twobyte_insn:
                 /* rdmsr */
                 if (ops->get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data)) {
                         emulate_gp(ctxt, 0);
+                        rc = X86EMUL_PROPAGATE_FAULT;
                         goto done;
                 } else {
                         c->regs[VCPU_REGS_RAX] = (u32)msr_data;
@@ -3785,6 +3727,5 @@ twobyte_insn:
         goto writeback;
 
 cannot_emulate:
-        DPRINTF("Cannot emulate %02x\n", c->b);
         return -1;
 }
diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h
index 975bb45329a1..3377d53fcd36 100644
--- a/arch/x86/kvm/kvm_cache_regs.h
+++ b/arch/x86/kvm/kvm_cache_regs.h
@@ -73,6 +73,13 @@ static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
         return vcpu->arch.cr4 & mask;
 }
 
+static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
+{
+        if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
+                kvm_x86_ops->decache_cr3(vcpu);
+        return vcpu->arch.cr3;
+}
+
 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
 {
         return kvm_read_cr4_bits(vcpu, ~0UL);
@@ -84,4 +91,19 @@ static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
                 | ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32);
 }
 
+static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
+{
+        vcpu->arch.hflags |= HF_GUEST_MASK;
+}
+
+static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
+{
+        vcpu->arch.hflags &= ~HF_GUEST_MASK;
+}
+
+static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
+{
+        return vcpu->arch.hflags & HF_GUEST_MASK;
+}
+
 #endif
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 413f8973a855..93cf9d0d3653 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -277,7 +277,8 @@ static void apic_update_ppr(struct kvm_lapic *apic)
 
         if (old_ppr != ppr) {
                 apic_set_reg(apic, APIC_PROCPRI, ppr);
-                kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
+                if (ppr < old_ppr)
+                        kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
         }
 }
 
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index fbb04aee8301..9cafbb499813 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -18,9 +18,11 @@
  *
  */
 
+#include "irq.h"
 #include "mmu.h"
 #include "x86.h"
 #include "kvm_cache_regs.h"
+#include "x86.h"
 
 #include <linux/kvm_host.h>
 #include <linux/types.h>
@@ -194,7 +196,6 @@ static struct percpu_counter kvm_total_used_mmu_pages;
 
 static u64 __read_mostly shadow_trap_nonpresent_pte;
 static u64 __read_mostly shadow_notrap_nonpresent_pte;
-static u64 __read_mostly shadow_base_present_pte;
 static u64 __read_mostly shadow_nx_mask;
 static u64 __read_mostly shadow_x_mask; /* mutual exclusive with nx_mask */
 static u64 __read_mostly shadow_user_mask;
@@ -213,12 +214,6 @@ void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte)
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_set_nonpresent_ptes);
 
-void kvm_mmu_set_base_ptes(u64 base_pte)
-{
-        shadow_base_present_pte = base_pte;
-}
-EXPORT_SYMBOL_GPL(kvm_mmu_set_base_ptes);
-
 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
                 u64 dirty_mask, u64 nx_mask, u64 x_mask)
 {
@@ -482,46 +477,46 @@ static void kvm_mmu_page_set_gfn(struct kvm_mmu_page *sp, int index, gfn_t gfn)
 }
 
 /*
- * Return the pointer to the largepage write count for a given
- * gfn, handling slots that are not large page aligned.
+ * Return the pointer to the large page information for a given gfn,
+ * handling slots that are not large page aligned.
  */
-static int *slot_largepage_idx(gfn_t gfn,
-                               struct kvm_memory_slot *slot,
-                               int level)
+static struct kvm_lpage_info *lpage_info_slot(gfn_t gfn,
+                                              struct kvm_memory_slot *slot,
+                                              int level)
 {
         unsigned long idx;
 
         idx = (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
               (slot->base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
-        return &slot->lpage_info[level - 2][idx].write_count;
+        return &slot->lpage_info[level - 2][idx];
 }
 
 static void account_shadowed(struct kvm *kvm, gfn_t gfn)
 {
         struct kvm_memory_slot *slot;
-        int *write_count;
+        struct kvm_lpage_info *linfo;
         int i;
 
         slot = gfn_to_memslot(kvm, gfn);
         for (i = PT_DIRECTORY_LEVEL;
              i < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++i) {
-                write_count   = slot_largepage_idx(gfn, slot, i);
-                *write_count += 1;
+                linfo = lpage_info_slot(gfn, slot, i);
+                linfo->write_count += 1;
         }
 }
 
 static void unaccount_shadowed(struct kvm *kvm, gfn_t gfn)
 {
         struct kvm_memory_slot *slot;
-        int *write_count;
+        struct kvm_lpage_info *linfo;
         int i;
 
         slot = gfn_to_memslot(kvm, gfn);
         for (i = PT_DIRECTORY_LEVEL;
              i < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++i) {
-                write_count   = slot_largepage_idx(gfn, slot, i);
-                *write_count -= 1;
-                WARN_ON(*write_count < 0);
+                linfo = lpage_info_slot(gfn, slot, i);
+                linfo->write_count -= 1;
+                WARN_ON(linfo->write_count < 0);
         }
 }
 
@@ -530,12 +525,12 @@ static int has_wrprotected_page(struct kvm *kvm,
                                 int level)
 {
         struct kvm_memory_slot *slot;
-        int *largepage_idx;
+        struct kvm_lpage_info *linfo;
 
         slot = gfn_to_memslot(kvm, gfn);
         if (slot) {
-                largepage_idx = slot_largepage_idx(gfn, slot, level);
-                return *largepage_idx;
+                linfo = lpage_info_slot(gfn, slot, level);
+                return linfo->write_count;
         }
 
         return 1;
@@ -590,16 +585,15 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn)
 static unsigned long *gfn_to_rmap(struct kvm *kvm, gfn_t gfn, int level)
 {
         struct kvm_memory_slot *slot;
-        unsigned long idx;
+        struct kvm_lpage_info *linfo;
 
         slot = gfn_to_memslot(kvm, gfn);
         if (likely(level == PT_PAGE_TABLE_LEVEL))
                 return &slot->rmap[gfn - slot->base_gfn];
 
-        idx = (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
-                (slot->base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
+        linfo = lpage_info_slot(gfn, slot, level);
 
-        return &slot->lpage_info[level - 2][idx].rmap_pde;
+        return &linfo->rmap_pde;
 }
 
 /*
@@ -887,19 +881,16 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
                 end = start + (memslot->npages << PAGE_SHIFT);
                 if (hva >= start && hva < end) {
                         gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT;
+                        gfn_t gfn = memslot->base_gfn + gfn_offset;
 
                         ret = handler(kvm, &memslot->rmap[gfn_offset], data);
 
                         for (j = 0; j < KVM_NR_PAGE_SIZES - 1; ++j) {
-                                unsigned long idx;
-                                int sh;
-
-                                sh = KVM_HPAGE_GFN_SHIFT(PT_DIRECTORY_LEVEL+j);
-                                idx = ((memslot->base_gfn+gfn_offset) >> sh) -
-                                        (memslot->base_gfn >> sh);
-                                ret |= handler(kvm,
-                                        &memslot->lpage_info[j][idx].rmap_pde,
-                                        data);
+                                struct kvm_lpage_info *linfo;
+
+                                linfo = lpage_info_slot(gfn, memslot,
+                                                        PT_DIRECTORY_LEVEL + j);
+                                ret |= handler(kvm, &linfo->rmap_pde, data);
                         }
                         trace_kvm_age_page(hva, memslot, ret);
                         retval |= ret;
@@ -1161,7 +1152,7 @@ static void nonpaging_prefetch_page(struct kvm_vcpu *vcpu,
 }
 
 static int nonpaging_sync_page(struct kvm_vcpu *vcpu,
-                               struct kvm_mmu_page *sp, bool clear_unsync)
+                               struct kvm_mmu_page *sp)
 {
         return 1;
 }
@@ -1291,7 +1282,7 @@ static int __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
         if (clear_unsync)
                 kvm_unlink_unsync_page(vcpu->kvm, sp);
 
-        if (vcpu->arch.mmu.sync_page(vcpu, sp, clear_unsync)) {
+        if (vcpu->arch.mmu.sync_page(vcpu, sp)) {
                 kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list);
                 return 1;
         }
@@ -1332,12 +1323,12 @@ static void kvm_sync_pages(struct kvm_vcpu *vcpu,  gfn_t gfn)
                         continue;
 
                 WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL);
+                kvm_unlink_unsync_page(vcpu->kvm, s);
                 if ((s->role.cr4_pae != !!is_pae(vcpu)) ||
-                        (vcpu->arch.mmu.sync_page(vcpu, s, true))) {
+                        (vcpu->arch.mmu.sync_page(vcpu, s))) {
                         kvm_mmu_prepare_zap_page(vcpu->kvm, s, &invalid_list);
                         continue;
                 }
-                kvm_unlink_unsync_page(vcpu->kvm, s);
                 flush = true;
         }
 
@@ -1963,9 +1954,9 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
                     unsigned pte_access, int user_fault,
                     int write_fault, int dirty, int level,
                     gfn_t gfn, pfn_t pfn, bool speculative,
-                    bool can_unsync, bool reset_host_protection)
+                    bool can_unsync, bool host_writable)
 {
-        u64 spte;
+        u64 spte, entry = *sptep;
         int ret = 0;
 
         /*
@@ -1973,7 +1964,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
          * whether the guest actually used the pte (in order to detect
          * demand paging).
          */
-        spte = shadow_base_present_pte;
+        spte = PT_PRESENT_MASK;
         if (!speculative)
                 spte |= shadow_accessed_mask;
         if (!dirty)
@@ -1990,8 +1981,10 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
                 spte |= kvm_x86_ops->get_mt_mask(vcpu, gfn,
                         kvm_is_mmio_pfn(pfn));
 
-        if (reset_host_protection)
+        if (host_writable)
                 spte |= SPTE_HOST_WRITEABLE;
+        else
+                pte_access &= ~ACC_WRITE_MASK;
 
         spte |= (u64)pfn << PAGE_SHIFT;
 
@@ -2036,6 +2029,14 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
 
 set_pte:
         update_spte(sptep, spte);
+        /*
+         * If we overwrite a writable spte with a read-only one we
+         * should flush remote TLBs. Otherwise rmap_write_protect
+         * will find a read-only spte, even though the writable spte
+         * might be cached on a CPU's TLB.
+         */
+        if (is_writable_pte(entry) && !is_writable_pte(*sptep))
+                kvm_flush_remote_tlbs(vcpu->kvm);
 done:
         return ret;
 }
@@ -2045,7 +2046,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
                          int user_fault, int write_fault, int dirty,
                          int *ptwrite, int level, gfn_t gfn,
                          pfn_t pfn, bool speculative,
-                         bool reset_host_protection)
+                         bool host_writable)
 {
         int was_rmapped = 0;
         int rmap_count;
@@ -2080,7 +2081,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
 
         if (set_spte(vcpu, sptep, pte_access, user_fault, write_fault,
                       dirty, level, gfn, pfn, speculative, true,
-                      reset_host_protection)) {
+                      host_writable)) {
                 if (write_fault)
                         *ptwrite = 1;
                 kvm_mmu_flush_tlb(vcpu);
@@ -2211,7 +2212,8 @@ static void direct_pte_prefetch(struct kvm_vcpu *vcpu, u64 *sptep)
 }
 
 static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
-                        int level, gfn_t gfn, pfn_t pfn)
+                        int map_writable, int level, gfn_t gfn, pfn_t pfn,
+                        bool prefault)
 {
         struct kvm_shadow_walk_iterator iterator;
         struct kvm_mmu_page *sp;
@@ -2220,9 +2222,11 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
 
         for_each_shadow_entry(vcpu, (u64)gfn << PAGE_SHIFT, iterator) {
                 if (iterator.level == level) {
-                        mmu_set_spte(vcpu, iterator.sptep, ACC_ALL, ACC_ALL,
+                        unsigned pte_access = ACC_ALL;
+
+                        mmu_set_spte(vcpu, iterator.sptep, ACC_ALL, pte_access,
                                      0, write, 1, &pt_write,
-                                     level, gfn, pfn, false, true);
+                                     level, gfn, pfn, prefault, map_writable);
                         direct_pte_prefetch(vcpu, iterator.sptep);
                         ++vcpu->stat.pf_fixed;
                         break;
@@ -2277,12 +2281,17 @@ static int kvm_handle_bad_page(struct kvm *kvm, gfn_t gfn, pfn_t pfn)
         return 1;
 }
 
-static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
+static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
+                         gva_t gva, pfn_t *pfn, bool write, bool *writable);
+
+static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn,
+                         bool prefault)
 {
         int r;
         int level;
         pfn_t pfn;
         unsigned long mmu_seq;
+        bool map_writable;
 
         level = mapping_level(vcpu, gfn);
 
@@ -2297,7 +2306,9 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
 
         mmu_seq = vcpu->kvm->mmu_notifier_seq;
         smp_rmb();
-        pfn = gfn_to_pfn(vcpu->kvm, gfn);
+
+        if (try_async_pf(vcpu, prefault, gfn, v, &pfn, write, &map_writable))
+                return 0;
 
         /* mmio */
         if (is_error_pfn(pfn))
@@ -2307,7 +2318,8 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
         if (mmu_notifier_retry(vcpu, mmu_seq))
                 goto out_unlock;
         kvm_mmu_free_some_pages(vcpu);
-        r = __direct_map(vcpu, v, write, level, gfn, pfn);
+        r = __direct_map(vcpu, v, write, map_writable, level, gfn, pfn,
+                         prefault);
         spin_unlock(&vcpu->kvm->mmu_lock);
 
 
@@ -2530,6 +2542,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)
                 hpa_t root = vcpu->arch.mmu.root_hpa;
                 sp = page_header(root);
                 mmu_sync_children(vcpu, sp);
+                trace_kvm_mmu_audit(vcpu, AUDIT_POST_SYNC);
                 return;
         }
         for (i = 0; i < 4; ++i) {
@@ -2552,23 +2565,24 @@ void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)
 }
 
 static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr,
-                                  u32 access, u32 *error)
+                                  u32 access, struct x86_exception *exception)
 {
-        if (error)
-                *error = 0;
+        if (exception)
+                exception->error_code = 0;
         return vaddr;
 }
 
 static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr,
-                                         u32 access, u32 *error)
+                                         u32 access,
+                                         struct x86_exception *exception)
 {
-        if (error)
-                *error = 0;
+        if (exception)
+                exception->error_code = 0;
         return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, access);
 }
 
 static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
-                                u32 error_code)
+                                u32 error_code, bool prefault)
 {
         gfn_t gfn;
         int r;
@@ -2584,17 +2598,67 @@ static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
         gfn = gva >> PAGE_SHIFT;
 
         return nonpaging_map(vcpu, gva & PAGE_MASK,
-                             error_code & PFERR_WRITE_MASK, gfn);
+                             error_code & PFERR_WRITE_MASK, gfn, prefault);
+}
+
+static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn)
+{
+        struct kvm_arch_async_pf arch;
+
+        arch.token = (vcpu->arch.apf.id++ << 12) | vcpu->vcpu_id;
+        arch.gfn = gfn;
+        arch.direct_map = vcpu->arch.mmu.direct_map;
+        arch.cr3 = vcpu->arch.mmu.get_cr3(vcpu);
+
+        return kvm_setup_async_pf(vcpu, gva, gfn, &arch);
 }
 
-static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa,
-                                u32 error_code)
+static bool can_do_async_pf(struct kvm_vcpu *vcpu)
+{
+        if (unlikely(!irqchip_in_kernel(vcpu->kvm) ||
+                     kvm_event_needs_reinjection(vcpu)))
+                return false;
+
+        return kvm_x86_ops->interrupt_allowed(vcpu);
+}
+
+static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
+                         gva_t gva, pfn_t *pfn, bool write, bool *writable)
+{
+        bool async;
+
+        *pfn = gfn_to_pfn_async(vcpu->kvm, gfn, &async, write, writable);
+
+        if (!async)
+                return false; /* *pfn has correct page already */
+
+        put_page(pfn_to_page(*pfn));
+
+        if (!prefault && can_do_async_pf(vcpu)) {
+                trace_kvm_try_async_get_page(gva, gfn);
+                if (kvm_find_async_pf_gfn(vcpu, gfn)) {
+                        trace_kvm_async_pf_doublefault(gva, gfn);
+                        kvm_make_request(KVM_REQ_APF_HALT, vcpu);
+                        return true;
+                } else if (kvm_arch_setup_async_pf(vcpu, gva, gfn))
+                        return true;
+        }
+
+        *pfn = gfn_to_pfn_prot(vcpu->kvm, gfn, write, writable);
+
+        return false;
+}
+
+static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code,
+                          bool prefault)
 {
         pfn_t pfn;
         int r;
         int level;
         gfn_t gfn = gpa >> PAGE_SHIFT;
         unsigned long mmu_seq;
+        int write = error_code & PFERR_WRITE_MASK;
+        bool map_writable;
 
         ASSERT(vcpu);
         ASSERT(VALID_PAGE(vcpu->arch.mmu.root_hpa));
@@ -2609,15 +2673,19 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa,
 
         mmu_seq = vcpu->kvm->mmu_notifier_seq;
         smp_rmb();
-        pfn = gfn_to_pfn(vcpu->kvm, gfn);
+
+        if (try_async_pf(vcpu, prefault, gfn, gpa, &pfn, write, &map_writable))
+                return 0;
+
+        /* mmio */
         if (is_error_pfn(pfn))
                 return kvm_handle_bad_page(vcpu->kvm, gfn, pfn);
         spin_lock(&vcpu->kvm->mmu_lock);
         if (mmu_notifier_retry(vcpu, mmu_seq))
                 goto out_unlock;
         kvm_mmu_free_some_pages(vcpu);
-        r = __direct_map(vcpu, gpa, error_code & PFERR_WRITE_MASK,
-                         level, gfn, pfn);
+        r = __direct_map(vcpu, gpa, write, map_writable,
+                         level, gfn, pfn, prefault);
         spin_unlock(&vcpu->kvm->mmu_lock);
 
         return r;
@@ -2659,18 +2727,19 @@ void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu)
 
 static void paging_new_cr3(struct kvm_vcpu *vcpu)
 {
-        pgprintk("%s: cr3 %lx\n", __func__, vcpu->arch.cr3);
+        pgprintk("%s: cr3 %lx\n", __func__, kvm_read_cr3(vcpu));
         mmu_free_roots(vcpu);
 }
 
 static unsigned long get_cr3(struct kvm_vcpu *vcpu)
 {
-        return vcpu->arch.cr3;
+        return kvm_read_cr3(vcpu);
 }
 
-static void inject_page_fault(struct kvm_vcpu *vcpu)
+static void inject_page_fault(struct kvm_vcpu *vcpu,
+                              struct x86_exception *fault)
 {
-        vcpu->arch.mmu.inject_page_fault(vcpu);
+        vcpu->arch.mmu.inject_page_fault(vcpu, fault);
 }
 
 static void paging_free(struct kvm_vcpu *vcpu)
@@ -2816,6 +2885,7 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
 {
         struct kvm_mmu *context = vcpu->arch.walk_mmu;
 
+        context->base_role.word = 0;
         context->new_cr3 = nonpaging_new_cr3;
         context->page_fault = tdp_page_fault;
         context->free = nonpaging_free;
@@ -3008,9 +3078,6 @@ static void mmu_pte_write_new_pte(struct kvm_vcpu *vcpu,
                 return;
         }
 
-        if (is_rsvd_bits_set(&vcpu->arch.mmu, *(u64 *)new, PT_PAGE_TABLE_LEVEL))
-                return;
-
         ++vcpu->kvm->stat.mmu_pte_updated;
         if (!sp->role.cr4_pae)
                 paging32_update_pte(vcpu, sp, spte, new);
@@ -3264,12 +3331,13 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
         }
 }
 
-int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
+int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code,
+                       void *insn, int insn_len)
 {
         int r;
         enum emulation_result er;
 
-        r = vcpu->arch.mmu.page_fault(vcpu, cr2, error_code);
+        r = vcpu->arch.mmu.page_fault(vcpu, cr2, error_code, false);
         if (r < 0)
                 goto out;
 
@@ -3282,7 +3350,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
         if (r)
                 goto out;
 
-        er = emulate_instruction(vcpu, cr2, error_code, 0);
+        er = x86_emulate_instruction(vcpu, cr2, 0, insn, insn_len);
 
         switch (er) {
         case EMULATE_DONE:
@@ -3377,11 +3445,14 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot)
                 if (!test_bit(slot, sp->slot_bitmap))
                         continue;
 
+                if (sp->role.level != PT_PAGE_TABLE_LEVEL)
+                        continue;
+
                 pt = sp->spt;
                 for (i = 0; i < PT64_ENT_PER_PAGE; ++i)
                         /* avoid RMW */
                         if (is_writable_pte(pt[i]))
-                                pt[i] &= ~PT_WRITABLE_MASK;
+                                update_spte(&pt[i], pt[i] & ~PT_WRITABLE_MASK);
         }
         kvm_flush_remote_tlbs(kvm);
 }
@@ -3463,13 +3534,6 @@ static void mmu_destroy_caches(void)
                 kmem_cache_destroy(mmu_page_header_cache);
 }
 
-void kvm_mmu_module_exit(void)
-{
-        mmu_destroy_caches();
-        percpu_counter_destroy(&kvm_total_used_mmu_pages);
-        unregister_shrinker(&mmu_shrinker);
-}
-
 int kvm_mmu_module_init(void)
 {
         pte_chain_cache = kmem_cache_create("kvm_pte_chain",
@@ -3566,7 +3630,7 @@ static int kvm_pv_mmu_write(struct kvm_vcpu *vcpu,
 
 static int kvm_pv_mmu_flush_tlb(struct kvm_vcpu *vcpu)
 {
-        (void)kvm_set_cr3(vcpu, vcpu->arch.cr3);
+        (void)kvm_set_cr3(vcpu, kvm_read_cr3(vcpu));
         return 1;
 }
 
@@ -3662,12 +3726,6 @@ int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4])
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_get_spte_hierarchy);
 
-#ifdef CONFIG_KVM_MMU_AUDIT
-#include "mmu_audit.c"
-#else
-static void mmu_audit_disable(void) { }
-#endif
-
 void kvm_mmu_destroy(struct kvm_vcpu *vcpu)
 {
         ASSERT(vcpu);
@@ -3675,5 +3733,18 @@ void kvm_mmu_destroy(struct kvm_vcpu *vcpu)
         destroy_kvm_mmu(vcpu);
         free_mmu_pages(vcpu);
         mmu_free_memory_caches(vcpu);
+}
+
+#ifdef CONFIG_KVM_MMU_AUDIT
+#include "mmu_audit.c"
+#else
+static void mmu_audit_disable(void) { }
+#endif
+
+void kvm_mmu_module_exit(void)
+{
+        mmu_destroy_caches();
+        percpu_counter_destroy(&kvm_total_used_mmu_pages);
+        unregister_shrinker(&mmu_shrinker);
         mmu_audit_disable();
 }
diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c
index ba2bcdde6221..5f6223b8bcf7 100644
--- a/arch/x86/kvm/mmu_audit.c
+++ b/arch/x86/kvm/mmu_audit.c
@@ -19,11 +19,9 @@
 
 #include <linux/ratelimit.h>
 
-static int audit_point;
-
-#define audit_printk(fmt, args...)              \
+#define audit_printk(kvm, fmt, args...)         \
         printk(KERN_ERR "audit: (%s) error: "   \
-                fmt, audit_point_name[audit_point], ##args)
+                fmt, audit_point_name[kvm->arch.audit_point], ##args)
 
 typedef void (*inspect_spte_fn) (struct kvm_vcpu *vcpu, u64 *sptep, int level);
 
@@ -97,18 +95,21 @@ static void audit_mappings(struct kvm_vcpu *vcpu, u64 *sptep, int level)
 
         if (sp->unsync) {
                 if (level != PT_PAGE_TABLE_LEVEL) {
-                        audit_printk("unsync sp: %p level = %d\n", sp, level);
+                        audit_printk(vcpu->kvm, "unsync sp: %p "
+                                     "level = %d\n", sp, level);
                         return;
                 }
 
                 if (*sptep == shadow_notrap_nonpresent_pte) {
-                        audit_printk("notrap spte in unsync sp: %p\n", sp);
+                        audit_printk(vcpu->kvm, "notrap spte in unsync "
+                                     "sp: %p\n", sp);
                         return;
                 }
         }
 
         if (sp->role.direct && *sptep == shadow_notrap_nonpresent_pte) {
-                audit_printk("notrap spte in direct sp: %p\n", sp);
+                audit_printk(vcpu->kvm, "notrap spte in direct sp: %p\n",
+                             sp);
                 return;
         }
 
@@ -125,8 +126,9 @@ static void audit_mappings(struct kvm_vcpu *vcpu, u64 *sptep, int level)
 
         hpa =  pfn << PAGE_SHIFT;
         if ((*sptep & PT64_BASE_ADDR_MASK) != hpa)
-                audit_printk("levels %d pfn %llx hpa %llx ent %llxn",
-                                   vcpu->arch.mmu.root_level, pfn, hpa, *sptep);
+                audit_printk(vcpu->kvm, "levels %d pfn %llx hpa %llx "
+                             "ent %llxn", vcpu->arch.mmu.root_level, pfn,
+                             hpa, *sptep);
 }
 
 static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
@@ -142,8 +144,8 @@ static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
         if (!gfn_to_memslot(kvm, gfn)) {
                 if (!printk_ratelimit())
                         return;
-                audit_printk("no memslot for gfn %llx\n", gfn);
-                audit_printk("index %ld of sp (gfn=%llx)\n",
+                audit_printk(kvm, "no memslot for gfn %llx\n", gfn);
+                audit_printk(kvm, "index %ld of sp (gfn=%llx)\n",
                        (long int)(sptep - rev_sp->spt), rev_sp->gfn);
                 dump_stack();
                 return;
@@ -153,7 +155,8 @@ static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
         if (!*rmapp) {
                 if (!printk_ratelimit())
                         return;
-                audit_printk("no rmap for writable spte %llx\n", *sptep);
+                audit_printk(kvm, "no rmap for writable spte %llx\n",
+                             *sptep);
                 dump_stack();
         }
 }
@@ -168,8 +171,9 @@ static void audit_spte_after_sync(struct kvm_vcpu *vcpu, u64 *sptep, int level)
 {
         struct kvm_mmu_page *sp = page_header(__pa(sptep));
 
-        if (audit_point == AUDIT_POST_SYNC && sp->unsync)
-                audit_printk("meet unsync sp(%p) after sync root.\n", sp);
+        if (vcpu->kvm->arch.audit_point == AUDIT_POST_SYNC && sp->unsync)
+                audit_printk(vcpu->kvm, "meet unsync sp(%p) after sync "
+                             "root.\n", sp);
 }
 
 static void check_mappings_rmap(struct kvm *kvm, struct kvm_mmu_page *sp)
@@ -202,8 +206,9 @@ static void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
         spte = rmap_next(kvm, rmapp, NULL);
         while (spte) {
                 if (is_writable_pte(*spte))
-                        audit_printk("shadow page has writable mappings: gfn "
-                                     "%llx role %x\n", sp->gfn, sp->role.word);
+                        audit_printk(kvm, "shadow page has writable "
+                                     "mappings: gfn %llx role %x\n",
+                                     sp->gfn, sp->role.word);
                 spte = rmap_next(kvm, rmapp, spte);
         }
 }
@@ -238,7 +243,7 @@ static void kvm_mmu_audit(void *ignore, struct kvm_vcpu *vcpu, int point)
         if (!__ratelimit(&ratelimit_state))
                 return;
 
-        audit_point = point;
+        vcpu->kvm->arch.audit_point = point;
         audit_all_active_sps(vcpu->kvm);
         audit_vcpu_spte(vcpu);
 }
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index cd7a833a3b52..53210f1e94c2 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -72,7 +72,7 @@ struct guest_walker {
         unsigned pt_access;
         unsigned pte_access;
         gfn_t gfn;
-        u32 error_code;
+        struct x86_exception fault;
 };
 
 static gfn_t gpte_to_gfn_lvl(pt_element_t gpte, int lvl)
@@ -266,21 +266,23 @@ walk:
         return 1;
 
 error:
-        walker->error_code = 0;
+        walker->fault.vector = PF_VECTOR;
+        walker->fault.error_code_valid = true;
+        walker->fault.error_code = 0;
         if (present)
-                walker->error_code |= PFERR_PRESENT_MASK;
+                walker->fault.error_code |= PFERR_PRESENT_MASK;
 
-        walker->error_code |= write_fault | user_fault;
+        walker->fault.error_code |= write_fault | user_fault;
 
         if (fetch_fault && mmu->nx)
-                walker->error_code |= PFERR_FETCH_MASK;
+                walker->fault.error_code |= PFERR_FETCH_MASK;
         if (rsvd_fault)
-                walker->error_code |= PFERR_RSVD_MASK;
+                walker->fault.error_code |= PFERR_RSVD_MASK;
 
-        vcpu->arch.fault.address    = addr;
-        vcpu->arch.fault.error_code = walker->error_code;
+        walker->fault.address = addr;
+        walker->fault.nested_page_fault = mmu != vcpu->arch.walk_mmu;
 
-        trace_kvm_mmu_walker_error(walker->error_code);
+        trace_kvm_mmu_walker_error(walker->fault.error_code);
         return 0;
 }
 
@@ -299,25 +301,42 @@ static int FNAME(walk_addr_nested)(struct guest_walker *walker,
                                         addr, access);
 }
 
+static bool FNAME(prefetch_invalid_gpte)(struct kvm_vcpu *vcpu,
+                                    struct kvm_mmu_page *sp, u64 *spte,
+                                    pt_element_t gpte)
+{
+        u64 nonpresent = shadow_trap_nonpresent_pte;
+
+        if (is_rsvd_bits_set(&vcpu->arch.mmu, gpte, PT_PAGE_TABLE_LEVEL))
+                goto no_present;
+
+        if (!is_present_gpte(gpte)) {
+                if (!sp->unsync)
+                        nonpresent = shadow_notrap_nonpresent_pte;
+                goto no_present;
+        }
+
+        if (!(gpte & PT_ACCESSED_MASK))
+                goto no_present;
+
+        return false;
+
+no_present:
+        drop_spte(vcpu->kvm, spte, nonpresent);
+        return true;
+}
+
 static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
                               u64 *spte, const void *pte)
 {
         pt_element_t gpte;
         unsigned pte_access;
         pfn_t pfn;
-        u64 new_spte;
 
         gpte = *(const pt_element_t *)pte;
-        if (~gpte & (PT_PRESENT_MASK | PT_ACCESSED_MASK)) {
-                if (!is_present_gpte(gpte)) {
-                        if (sp->unsync)
-                                new_spte = shadow_trap_nonpresent_pte;
-                        else
-                                new_spte = shadow_notrap_nonpresent_pte;
-                        __set_spte(spte, new_spte);
-                }
+        if (FNAME(prefetch_invalid_gpte)(vcpu, sp, spte, gpte))
                 return;
-        }
+
         pgprintk("%s: gpte %llx spte %p\n", __func__, (u64)gpte, spte);
         pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte);
         if (gpte_to_gfn(gpte) != vcpu->arch.update_pte.gfn)
@@ -329,7 +348,7 @@ static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
                 return;
         kvm_get_pfn(pfn);
         /*
-         * we call mmu_set_spte() with reset_host_protection = true beacuse that
+         * we call mmu_set_spte() with host_writable = true beacuse that
          * vcpu->arch.update_pte.pfn was fetched from get_user_pages(write = 1).
          */
         mmu_set_spte(vcpu, spte, sp->role.access, pte_access, 0, 0,
@@ -364,7 +383,6 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw,
                                 u64 *sptep)
 {
         struct kvm_mmu_page *sp;
-        struct kvm_mmu *mmu = &vcpu->arch.mmu;
         pt_element_t *gptep = gw->prefetch_ptes;
         u64 *spte;
         int i;
@@ -395,14 +413,7 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw,
 
                 gpte = gptep[i];
 
-                if (!is_present_gpte(gpte) ||
-                      is_rsvd_bits_set(mmu, gpte, PT_PAGE_TABLE_LEVEL)) {
-                        if (!sp->unsync)
-                                __set_spte(spte, shadow_notrap_nonpresent_pte);
-                        continue;
-                }
-
-                if (!(gpte & PT_ACCESSED_MASK))
+                if (FNAME(prefetch_invalid_gpte)(vcpu, sp, spte, gpte))
                         continue;
 
                 pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte);
@@ -427,7 +438,8 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw,
 static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
                          struct guest_walker *gw,
                          int user_fault, int write_fault, int hlevel,
-                         int *ptwrite, pfn_t pfn)
+                         int *ptwrite, pfn_t pfn, bool map_writable,
+                         bool prefault)
 {
         unsigned access = gw->pt_access;
         struct kvm_mmu_page *sp = NULL;
@@ -501,7 +513,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
 
         mmu_set_spte(vcpu, it.sptep, access, gw->pte_access & access,
                      user_fault, write_fault, dirty, ptwrite, it.level,
-                     gw->gfn, pfn, false, true);
+                     gw->gfn, pfn, prefault, map_writable);
         FNAME(pte_prefetch)(vcpu, gw, it.sptep);
 
         return it.sptep;
@@ -527,8 +539,8 @@ out_gpte_changed:
  *  Returns: 1 if we need to emulate the instruction, 0 otherwise, or
  *           a negative value on error.
  */
-static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
-                               u32 error_code)
+static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
+                             bool prefault)
 {
         int write_fault = error_code & PFERR_WRITE_MASK;
         int user_fault = error_code & PFERR_USER_MASK;
@@ -539,6 +551,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
         pfn_t pfn;
         int level = PT_PAGE_TABLE_LEVEL;
         unsigned long mmu_seq;
+        bool map_writable;
 
         pgprintk("%s: addr %lx err %x\n", __func__, addr, error_code);
 
@@ -556,8 +569,11 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
          */
         if (!r) {
                 pgprintk("%s: guest page fault\n", __func__);
-                inject_page_fault(vcpu);
-                vcpu->arch.last_pt_write_count = 0; /* reset fork detector */
+                if (!prefault) {
+                        inject_page_fault(vcpu, &walker.fault);
+                        /* reset fork detector */
+                        vcpu->arch.last_pt_write_count = 0;
+                }
                 return 0;
         }
 
@@ -568,7 +584,10 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
 
         mmu_seq = vcpu->kvm->mmu_notifier_seq;
         smp_rmb();
-        pfn = gfn_to_pfn(vcpu->kvm, walker.gfn);
+
+        if (try_async_pf(vcpu, prefault, walker.gfn, addr, &pfn, write_fault,
+                         &map_writable))
+                return 0;
 
         /* mmio */
         if (is_error_pfn(pfn))
@@ -581,7 +600,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
         trace_kvm_mmu_audit(vcpu, AUDIT_PRE_PAGE_FAULT);
         kvm_mmu_free_some_pages(vcpu);
         sptep = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault,
-                             level, &write_pt, pfn);
+                             level, &write_pt, pfn, map_writable, prefault);
         (void)sptep;
         pgprintk("%s: shadow pte %p %llx ptwrite %d\n", __func__,
                  sptep, *sptep, write_pt);
@@ -661,7 +680,7 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
 }
 
 static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
-                               u32 *error)
+                               struct x86_exception *exception)
 {
         struct guest_walker walker;
         gpa_t gpa = UNMAPPED_GVA;
@@ -672,14 +691,15 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
         if (r) {
                 gpa = gfn_to_gpa(walker.gfn);
                 gpa |= vaddr & ~PAGE_MASK;
-        } else if (error)
-                *error = walker.error_code;
+        } else if (exception)
+                *exception = walker.fault;
 
         return gpa;
 }
 
 static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
-                                      u32 access, u32 *error)
+                                      u32 access,
+                                      struct x86_exception *exception)
 {
         struct guest_walker walker;
         gpa_t gpa = UNMAPPED_GVA;
@@ -690,8 +710,8 @@ static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
         if (r) {
                 gpa = gfn_to_gpa(walker.gfn);
                 gpa |= vaddr & ~PAGE_MASK;
-        } else if (error)
-                *error = walker.error_code;
+        } else if (exception)
+                *exception = walker.fault;
 
         return gpa;
 }
@@ -730,12 +750,19 @@ static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
  * Using the cached information from sp->gfns is safe because:
  * - The spte has a reference to the struct page, so the pfn for a given gfn
  *   can't change unless all sptes pointing to it are nuked first.
+ *
+ * Note:
+ *   We should flush all tlbs if spte is dropped even though guest is
+ *   responsible for it. Since if we don't, kvm_mmu_notifier_invalidate_page
+ *   and kvm_mmu_notifier_invalidate_range_start detect the mapping page isn't
+ *   used by guest then tlbs are not flushed, so guest is allowed to access the
+ *   freed pages.
+ *   And we increase kvm->tlbs_dirty to delay tlbs flush in this case.
  */
-static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
-                            bool clear_unsync)
+static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
 {
         int i, offset, nr_present;
-        bool reset_host_protection;
+        bool host_writable;
         gpa_t first_pte_gpa;
 
         offset = nr_present = 0;
@@ -764,31 +791,27 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
                         return -EINVAL;
 
                 gfn = gpte_to_gfn(gpte);
-                if (is_rsvd_bits_set(&vcpu->arch.mmu, gpte, PT_PAGE_TABLE_LEVEL)
-                      || gfn != sp->gfns[i] || !is_present_gpte(gpte)
-                      || !(gpte & PT_ACCESSED_MASK)) {
-                        u64 nonpresent;
 
-                        if (is_present_gpte(gpte) || !clear_unsync)
-                                nonpresent = shadow_trap_nonpresent_pte;
-                        else
-                                nonpresent = shadow_notrap_nonpresent_pte;
-                        drop_spte(vcpu->kvm, &sp->spt[i], nonpresent);
+                if (FNAME(prefetch_invalid_gpte)(vcpu, sp, &sp->spt[i], gpte)) {
+                        vcpu->kvm->tlbs_dirty++;
+                        continue;
+                }
+
+                if (gfn != sp->gfns[i]) {
+                        drop_spte(vcpu->kvm, &sp->spt[i],
+                                      shadow_trap_nonpresent_pte);
+                        vcpu->kvm->tlbs_dirty++;
                         continue;
                 }
 
                 nr_present++;
                 pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte);
-                if (!(sp->spt[i] & SPTE_HOST_WRITEABLE)) {
-                        pte_access &= ~ACC_WRITE_MASK;
-                        reset_host_protection = 0;
-                } else {
-                        reset_host_protection = 1;
-                }
+                host_writable = sp->spt[i] & SPTE_HOST_WRITEABLE;
+
                 set_spte(vcpu, &sp->spt[i], pte_access, 0, 0,
                          is_dirty_gpte(gpte), PT_PAGE_TABLE_LEVEL, gfn,
                          spte_to_pfn(sp->spt[i]), true, false,
-                         reset_host_protection);
+                         host_writable);
         }
 
         return !nr_present;
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b81a9b7c2ca4..25bd1bc5aad2 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -31,6 +31,7 @@
 
 #include <asm/tlbflush.h>
 #include <asm/desc.h>
+#include <asm/kvm_para.h>
 
 #include <asm/virtext.h>
 #include "trace.h"
@@ -50,6 +51,10 @@ MODULE_LICENSE("GPL");
 #define SVM_FEATURE_LBRV           (1 <<  1)
 #define SVM_FEATURE_SVML           (1 <<  2)
 #define SVM_FEATURE_NRIP           (1 <<  3)
+#define SVM_FEATURE_TSC_RATE       (1 <<  4)
+#define SVM_FEATURE_VMCB_CLEAN     (1 <<  5)
+#define SVM_FEATURE_FLUSH_ASID     (1 <<  6)
+#define SVM_FEATURE_DECODE_ASSIST  (1 <<  7)
 #define SVM_FEATURE_PAUSE_FILTER   (1 << 10)
 
 #define NESTED_EXIT_HOST        0       /* Exit handled on host level */
@@ -97,10 +102,8 @@ struct nested_state {
         unsigned long vmexit_rax;
 
         /* cache for intercepts of the guest */
-        u16 intercept_cr_read;
-        u16 intercept_cr_write;
-        u16 intercept_dr_read;
-        u16 intercept_dr_write;
+        u32 intercept_cr;
+        u32 intercept_dr;
         u32 intercept_exceptions;
         u64 intercept;
 
@@ -123,7 +126,12 @@ struct vcpu_svm {
         u64 next_rip;
 
         u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
-        u64 host_gs_base;
+        struct {
+                u16 fs;
+                u16 gs;
+                u16 ldt;
+                u64 gs_base;
+        } host;
 
         u32 *msrpm;
 
@@ -133,6 +141,7 @@ struct vcpu_svm {
 
         unsigned int3_injected;
         unsigned long int3_rip;
+        u32 apf_reason;
 };
 
 #define MSR_INVALID                     0xffffffffU
@@ -180,14 +189,151 @@ static int nested_svm_vmexit(struct vcpu_svm *svm);
 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
                                       bool has_error_code, u32 error_code);
 
+enum {
+        VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
+                            pause filter count */
+        VMCB_PERM_MAP,   /* IOPM Base and MSRPM Base */
+        VMCB_ASID,       /* ASID */
+        VMCB_INTR,       /* int_ctl, int_vector */
+        VMCB_NPT,        /* npt_en, nCR3, gPAT */
+        VMCB_CR,         /* CR0, CR3, CR4, EFER */
+        VMCB_DR,         /* DR6, DR7 */
+        VMCB_DT,         /* GDT, IDT */
+        VMCB_SEG,        /* CS, DS, SS, ES, CPL */
+        VMCB_CR2,        /* CR2 only */
+        VMCB_LBR,        /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
+        VMCB_DIRTY_MAX,
+};
+
+/* TPR and CR2 are always written before VMRUN */
+#define VMCB_ALWAYS_DIRTY_MASK  ((1U << VMCB_INTR) | (1U << VMCB_CR2))
+
+static inline void mark_all_dirty(struct vmcb *vmcb)
+{
+        vmcb->control.clean = 0;
+}
+
+static inline void mark_all_clean(struct vmcb *vmcb)
+{
+        vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
+                               & ~VMCB_ALWAYS_DIRTY_MASK;
+}
+
+static inline void mark_dirty(struct vmcb *vmcb, int bit)
+{
+        vmcb->control.clean &= ~(1 << bit);
+}
+
 static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
 {
         return container_of(vcpu, struct vcpu_svm, vcpu);
 }
 
-static inline bool is_nested(struct vcpu_svm *svm)
+static void recalc_intercepts(struct vcpu_svm *svm)
+{
+        struct vmcb_control_area *c, *h;
+        struct nested_state *g;
+
+        mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+
+        if (!is_guest_mode(&svm->vcpu))
+                return;
+
+        c = &svm->vmcb->control;
+        h = &svm->nested.hsave->control;
+        g = &svm->nested;
+
+        c->intercept_cr = h->intercept_cr | g->intercept_cr;
+        c->intercept_dr = h->intercept_dr | g->intercept_dr;
+        c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
+        c->intercept = h->intercept | g->intercept;
+}
+
+static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
+{
+        if (is_guest_mode(&svm->vcpu))
+                return svm->nested.hsave;
+        else
+                return svm->vmcb;
+}
+
+static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept_cr |= (1U << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept_cr &= ~(1U << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        return vmcb->control.intercept_cr & (1U << bit);
+}
+
+static inline void set_dr_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept_dr |= (1U << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept_dr &= ~(1U << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept_exceptions |= (1U << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
 {
-        return svm->nested.vmcb;
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept_exceptions &= ~(1U << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline void set_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept |= (1ULL << bit);
+
+        recalc_intercepts(svm);
+}
+
+static inline void clr_intercept(struct vcpu_svm *svm, int bit)
+{
+        struct vmcb *vmcb = get_host_vmcb(svm);
+
+        vmcb->control.intercept &= ~(1ULL << bit);
+
+        recalc_intercepts(svm);
 }
 
 static inline void enable_gif(struct vcpu_svm *svm)
@@ -264,11 +410,6 @@ static u32 svm_msrpm_offset(u32 msr)
 
 #define MAX_INST_SIZE 15
 
-static inline u32 svm_has(u32 feat)
-{
-        return svm_features & feat;
-}
-
 static inline void clgi(void)
 {
         asm volatile (__ex(SVM_CLGI));
@@ -284,16 +425,6 @@ static inline void invlpga(unsigned long addr, u32 asid)
         asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
 }
 
-static inline void force_new_asid(struct kvm_vcpu *vcpu)
-{
-        to_svm(vcpu)->asid_generation--;
-}
-
-static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
-{
-        force_new_asid(vcpu);
-}
-
 static int get_npt_level(void)
 {
 #ifdef CONFIG_X86_64
@@ -310,6 +441,7 @@ static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
                 efer &= ~EFER_LME;
 
         to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
+        mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
 }
 
 static int is_external_interrupt(u32 info)
@@ -347,7 +479,7 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
                 svm->next_rip = svm->vmcb->control.next_rip;
 
         if (!svm->next_rip) {
-                if (emulate_instruction(vcpu, 0, 0, EMULTYPE_SKIP) !=
+                if (emulate_instruction(vcpu, EMULTYPE_SKIP) !=
                                 EMULATE_DONE)
                         printk(KERN_DEBUG "%s: NOP\n", __func__);
                 return;
@@ -374,7 +506,7 @@ static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
             nested_svm_check_exception(svm, nr, has_error_code, error_code))
                 return;
 
-        if (nr == BP_VECTOR && !svm_has(SVM_FEATURE_NRIP)) {
+        if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
                 unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
 
                 /*
@@ -670,7 +802,7 @@ static __init int svm_hardware_setup(void)
 
         svm_features = cpuid_edx(SVM_CPUID_FUNC);
 
-        if (!svm_has(SVM_FEATURE_NPT))
+        if (!boot_cpu_has(X86_FEATURE_NPT))
                 npt_enabled = false;
 
         if (npt_enabled && !npt) {
@@ -725,13 +857,15 @@ static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
         struct vcpu_svm *svm = to_svm(vcpu);
         u64 g_tsc_offset = 0;
 
-        if (is_nested(svm)) {
+        if (is_guest_mode(vcpu)) {
                 g_tsc_offset = svm->vmcb->control.tsc_offset -
                                svm->nested.hsave->control.tsc_offset;
                 svm->nested.hsave->control.tsc_offset = offset;
         }
 
         svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
+
+        mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
 }
 
 static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
@@ -739,8 +873,9 @@ static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->control.tsc_offset += adjustment;
-        if (is_nested(svm))
+        if (is_guest_mode(vcpu))
                 svm->nested.hsave->control.tsc_offset += adjustment;
+        mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
 }
 
 static void init_vmcb(struct vcpu_svm *svm)
@@ -749,62 +884,62 @@ static void init_vmcb(struct vcpu_svm *svm)
         struct vmcb_save_area *save = &svm->vmcb->save;
 
         svm->vcpu.fpu_active = 1;
+        svm->vcpu.arch.hflags = 0;
 
-        control->intercept_cr_read =    INTERCEPT_CR0_MASK |
-                                        INTERCEPT_CR3_MASK |
-                                        INTERCEPT_CR4_MASK;
-
-        control->intercept_cr_write =   INTERCEPT_CR0_MASK |
-                                        INTERCEPT_CR3_MASK |
-                                        INTERCEPT_CR4_MASK |
-                                        INTERCEPT_CR8_MASK;
-
-        control->intercept_dr_read =    INTERCEPT_DR0_MASK |
-                                        INTERCEPT_DR1_MASK |
-                                        INTERCEPT_DR2_MASK |
-                                        INTERCEPT_DR3_MASK |
-                                        INTERCEPT_DR4_MASK |
-                                        INTERCEPT_DR5_MASK |
-                                        INTERCEPT_DR6_MASK |
-                                        INTERCEPT_DR7_MASK;
-
-        control->intercept_dr_write =   INTERCEPT_DR0_MASK |
-                                        INTERCEPT_DR1_MASK |
-                                        INTERCEPT_DR2_MASK |
-                                        INTERCEPT_DR3_MASK |
-                                        INTERCEPT_DR4_MASK |
-                                        INTERCEPT_DR5_MASK |
-                                        INTERCEPT_DR6_MASK |
-                                        INTERCEPT_DR7_MASK;
-
-        control->intercept_exceptions = (1 << PF_VECTOR) |
-                                        (1 << UD_VECTOR) |
-                                        (1 << MC_VECTOR);
-
-
-        control->intercept =    (1ULL << INTERCEPT_INTR) |
-                                (1ULL << INTERCEPT_NMI) |
-                                (1ULL << INTERCEPT_SMI) |
-                                (1ULL << INTERCEPT_SELECTIVE_CR0) |
-                                (1ULL << INTERCEPT_CPUID) |
-                                (1ULL << INTERCEPT_INVD) |
-                                (1ULL << INTERCEPT_HLT) |
-                                (1ULL << INTERCEPT_INVLPG) |
-                                (1ULL << INTERCEPT_INVLPGA) |
-                                (1ULL << INTERCEPT_IOIO_PROT) |
-                                (1ULL << INTERCEPT_MSR_PROT) |
-                                (1ULL << INTERCEPT_TASK_SWITCH) |
-                                (1ULL << INTERCEPT_SHUTDOWN) |
-                                (1ULL << INTERCEPT_VMRUN) |
-                                (1ULL << INTERCEPT_VMMCALL) |
-                                (1ULL << INTERCEPT_VMLOAD) |
-                                (1ULL << INTERCEPT_VMSAVE) |
-                                (1ULL << INTERCEPT_STGI) |
-                                (1ULL << INTERCEPT_CLGI) |
-                                (1ULL << INTERCEPT_SKINIT) |
-                                (1ULL << INTERCEPT_WBINVD) |
-                                (1ULL << INTERCEPT_MONITOR) |
-                                (1ULL << INTERCEPT_MWAIT);
+        set_cr_intercept(svm, INTERCEPT_CR0_READ);
+        set_cr_intercept(svm, INTERCEPT_CR3_READ);
+        set_cr_intercept(svm, INTERCEPT_CR4_READ);
+        set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
+        set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
+        set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
+        set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+
+        set_dr_intercept(svm, INTERCEPT_DR0_READ);
+        set_dr_intercept(svm, INTERCEPT_DR1_READ);
+        set_dr_intercept(svm, INTERCEPT_DR2_READ);
+        set_dr_intercept(svm, INTERCEPT_DR3_READ);
+        set_dr_intercept(svm, INTERCEPT_DR4_READ);
+        set_dr_intercept(svm, INTERCEPT_DR5_READ);
+        set_dr_intercept(svm, INTERCEPT_DR6_READ);
+        set_dr_intercept(svm, INTERCEPT_DR7_READ);
+
+        set_dr_intercept(svm, INTERCEPT_DR0_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR1_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR2_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR3_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR4_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR5_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR6_WRITE);
+        set_dr_intercept(svm, INTERCEPT_DR7_WRITE);
+
+        set_exception_intercept(svm, PF_VECTOR);
+        set_exception_intercept(svm, UD_VECTOR);
+        set_exception_intercept(svm, MC_VECTOR);
+
+        set_intercept(svm, INTERCEPT_INTR);
+        set_intercept(svm, INTERCEPT_NMI);
+        set_intercept(svm, INTERCEPT_SMI);
+        set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
+        set_intercept(svm, INTERCEPT_CPUID);
+        set_intercept(svm, INTERCEPT_INVD);
+        set_intercept(svm, INTERCEPT_HLT);
+        set_intercept(svm, INTERCEPT_INVLPG);
+        set_intercept(svm, INTERCEPT_INVLPGA);
+        set_intercept(svm, INTERCEPT_IOIO_PROT);
+        set_intercept(svm, INTERCEPT_MSR_PROT);
+        set_intercept(svm, INTERCEPT_TASK_SWITCH);
+        set_intercept(svm, INTERCEPT_SHUTDOWN);
+        set_intercept(svm, INTERCEPT_VMRUN);
+        set_intercept(svm, INTERCEPT_VMMCALL);
+        set_intercept(svm, INTERCEPT_VMLOAD);
+        set_intercept(svm, INTERCEPT_VMSAVE);
+        set_intercept(svm, INTERCEPT_STGI);
+        set_intercept(svm, INTERCEPT_CLGI);
+        set_intercept(svm, INTERCEPT_SKINIT);
+        set_intercept(svm, INTERCEPT_WBINVD);
+        set_intercept(svm, INTERCEPT_MONITOR);
+        set_intercept(svm, INTERCEPT_MWAIT);
+        set_intercept(svm, INTERCEPT_XSETBV);
 
         control->iopm_base_pa = iopm_base;
         control->msrpm_base_pa = __pa(svm->msrpm);
@@ -855,25 +990,27 @@ static void init_vmcb(struct vcpu_svm *svm)
         if (npt_enabled) {
                 /* Setup VMCB for Nested Paging */
                 control->nested_ctl = 1;
-                control->intercept &= ~((1ULL << INTERCEPT_TASK_SWITCH) |
-                                        (1ULL << INTERCEPT_INVLPG));
-                control->intercept_exceptions &= ~(1 << PF_VECTOR);
-                control->intercept_cr_read &= ~INTERCEPT_CR3_MASK;
-                control->intercept_cr_write &= ~INTERCEPT_CR3_MASK;
+                clr_intercept(svm, INTERCEPT_TASK_SWITCH);
+                clr_intercept(svm, INTERCEPT_INVLPG);
+                clr_exception_intercept(svm, PF_VECTOR);
+                clr_cr_intercept(svm, INTERCEPT_CR3_READ);
+                clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
                 save->g_pat = 0x0007040600070406ULL;
                 save->cr3 = 0;
                 save->cr4 = 0;
         }
-        force_new_asid(&svm->vcpu);
+        svm->asid_generation = 0;
 
         svm->nested.vmcb = 0;
         svm->vcpu.arch.hflags = 0;
 
-        if (svm_has(SVM_FEATURE_PAUSE_FILTER)) {
+        if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
                 control->pause_filter_count = 3000;
-                control->intercept |= (1ULL << INTERCEPT_PAUSE);
+                set_intercept(svm, INTERCEPT_PAUSE);
         }
 
+        mark_all_dirty(svm->vmcb);
+
         enable_gif(svm);
 }
 
@@ -990,8 +1127,16 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 
         if (unlikely(cpu != vcpu->cpu)) {
                 svm->asid_generation = 0;
+                mark_all_dirty(svm->vmcb);
         }
 
+#ifdef CONFIG_X86_64
+        rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
+#endif
+        savesegment(fs, svm->host.fs);
+        savesegment(gs, svm->host.gs);
+        svm->host.ldt = kvm_read_ldt();
+
         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
                 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
 }
@@ -1002,6 +1147,14 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu)
         int i;
 
         ++vcpu->stat.host_state_reload;
+        kvm_load_ldt(svm->host.ldt);
+#ifdef CONFIG_X86_64
+        loadsegment(fs, svm->host.fs);
+        load_gs_index(svm->host.gs);
+        wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
+#else
+        loadsegment(gs, svm->host.gs);
+#endif
         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
                 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
 }
@@ -1021,7 +1174,7 @@ static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
         switch (reg) {
         case VCPU_EXREG_PDPTR:
                 BUG_ON(!npt_enabled);
-                load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3);
+                load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
                 break;
         default:
                 BUG();
@@ -1030,12 +1183,12 @@ static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
 
 static void svm_set_vintr(struct vcpu_svm *svm)
 {
-        svm->vmcb->control.intercept |= 1ULL << INTERCEPT_VINTR;
+        set_intercept(svm, INTERCEPT_VINTR);
 }
 
 static void svm_clear_vintr(struct vcpu_svm *svm)
 {
-        svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
+        clr_intercept(svm, INTERCEPT_VINTR);
 }
 
 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
@@ -1150,6 +1303,7 @@ static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
 
         svm->vmcb->save.idtr.limit = dt->size;
         svm->vmcb->save.idtr.base = dt->address ;
+        mark_dirty(svm->vmcb, VMCB_DT);
 }
 
 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
@@ -1166,19 +1320,23 @@ static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
 
         svm->vmcb->save.gdtr.limit = dt->size;
         svm->vmcb->save.gdtr.base = dt->address ;
+        mark_dirty(svm->vmcb, VMCB_DT);
 }
 
 static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
 {
 }
 
+static void svm_decache_cr3(struct kvm_vcpu *vcpu)
+{
+}
+
 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
 {
 }
 
 static void update_cr0_intercept(struct vcpu_svm *svm)
 {
-        struct vmcb *vmcb = svm->vmcb;
         ulong gcr0 = svm->vcpu.arch.cr0;
         u64 *hcr0 = &svm->vmcb->save.cr0;
 
@@ -1188,27 +1346,14 @@ static void update_cr0_intercept(struct vcpu_svm *svm)
                 *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
                         | (gcr0 & SVM_CR0_SELECTIVE_MASK);
 
+        mark_dirty(svm->vmcb, VMCB_CR);
 
         if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
-                vmcb->control.intercept_cr_read &= ~INTERCEPT_CR0_MASK;
-                vmcb->control.intercept_cr_write &= ~INTERCEPT_CR0_MASK;
-                if (is_nested(svm)) {
-                        struct vmcb *hsave = svm->nested.hsave;
-
-                        hsave->control.intercept_cr_read  &= ~INTERCEPT_CR0_MASK;
-                        hsave->control.intercept_cr_write &= ~INTERCEPT_CR0_MASK;
-                        vmcb->control.intercept_cr_read  |= svm->nested.intercept_cr_read;
-                        vmcb->control.intercept_cr_write |= svm->nested.intercept_cr_write;
-                }
+                clr_cr_intercept(svm, INTERCEPT_CR0_READ);
+                clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
         } else {
-                svm->vmcb->control.intercept_cr_read |= INTERCEPT_CR0_MASK;
-                svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR0_MASK;
-                if (is_nested(svm)) {
-                        struct vmcb *hsave = svm->nested.hsave;
-
-                        hsave->control.intercept_cr_read |= INTERCEPT_CR0_MASK;
-                        hsave->control.intercept_cr_write |= INTERCEPT_CR0_MASK;
-                }
+                set_cr_intercept(svm, INTERCEPT_CR0_READ);
+                set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
         }
 }
 
@@ -1216,7 +1361,7 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
 
-        if (is_nested(svm)) {
+        if (is_guest_mode(vcpu)) {
                 /*
                  * We are here because we run in nested mode, the host kvm
                  * intercepts cr0 writes but the l1 hypervisor does not.
@@ -1268,6 +1413,7 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
          */
         cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
         svm->vmcb->save.cr0 = cr0;
+        mark_dirty(svm->vmcb, VMCB_CR);
         update_cr0_intercept(svm);
 }
 
@@ -1277,13 +1423,14 @@ static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
         unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
 
         if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
-                force_new_asid(vcpu);
+                svm_flush_tlb(vcpu);
 
         vcpu->arch.cr4 = cr4;
         if (!npt_enabled)
                 cr4 |= X86_CR4_PAE;
         cr4 |= host_cr4_mce;
         to_svm(vcpu)->vmcb->save.cr4 = cr4;
+        mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
 }
 
 static void svm_set_segment(struct kvm_vcpu *vcpu,
@@ -1312,26 +1459,25 @@ static void svm_set_segment(struct kvm_vcpu *vcpu,
                         = (svm->vmcb->save.cs.attrib
                            >> SVM_SELECTOR_DPL_SHIFT) & 3;
 
+        mark_dirty(svm->vmcb, VMCB_SEG);
 }
 
 static void update_db_intercept(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
 
-        svm->vmcb->control.intercept_exceptions &=
-                ~((1 << DB_VECTOR) | (1 << BP_VECTOR));
+        clr_exception_intercept(svm, DB_VECTOR);
+        clr_exception_intercept(svm, BP_VECTOR);
 
         if (svm->nmi_singlestep)
-                svm->vmcb->control.intercept_exceptions |= (1 << DB_VECTOR);
+                set_exception_intercept(svm, DB_VECTOR);
 
         if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
                 if (vcpu->guest_debug &
                     (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
-                        svm->vmcb->control.intercept_exceptions |=
-                                1 << DB_VECTOR;
+                        set_exception_intercept(svm, DB_VECTOR);
                 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
-                        svm->vmcb->control.intercept_exceptions |=
-                                1 << BP_VECTOR;
+                        set_exception_intercept(svm, BP_VECTOR);
         } else
                 vcpu->guest_debug = 0;
 }
@@ -1345,21 +1491,9 @@ static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
         else
                 svm->vmcb->save.dr7 = vcpu->arch.dr7;
 
-        update_db_intercept(vcpu);
-}
-
-static void load_host_msrs(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_X86_64
-        wrmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
-#endif
-}
+        mark_dirty(svm->vmcb, VMCB_DR);
 
-static void save_host_msrs(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_X86_64
-        rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
-#endif
+        update_db_intercept(vcpu);
 }
 
 static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
@@ -1372,6 +1506,8 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
 
         svm->asid_generation = sd->asid_generation;
         svm->vmcb->control.asid = sd->next_asid++;
+
+        mark_dirty(svm->vmcb, VMCB_ASID);
 }
 
 static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
@@ -1379,20 +1515,40 @@ static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->save.dr7 = value;
+        mark_dirty(svm->vmcb, VMCB_DR);
 }
 
 static int pf_interception(struct vcpu_svm *svm)
 {
-        u64 fault_address;
+        u64 fault_address = svm->vmcb->control.exit_info_2;
         u32 error_code;
+        int r = 1;
 
-        fault_address  = svm->vmcb->control.exit_info_2;
-        error_code = svm->vmcb->control.exit_info_1;
-
-        trace_kvm_page_fault(fault_address, error_code);
-        if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
-                kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
-        return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
+        switch (svm->apf_reason) {
+        default:
+                error_code = svm->vmcb->control.exit_info_1;
+
+                trace_kvm_page_fault(fault_address, error_code);
+                if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
+                        kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
+                r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
+                        svm->vmcb->control.insn_bytes,
+                        svm->vmcb->control.insn_len);
+                break;
+        case KVM_PV_REASON_PAGE_NOT_PRESENT:
+                svm->apf_reason = 0;
+                local_irq_disable();
+                kvm_async_pf_task_wait(fault_address);
+                local_irq_enable();
+                break;
+        case KVM_PV_REASON_PAGE_READY:
+                svm->apf_reason = 0;
+                local_irq_disable();
+                kvm_async_pf_task_wake(fault_address);
+                local_irq_enable();
+                break;
+        }
+        return r;
 }
 
 static int db_interception(struct vcpu_svm *svm)
@@ -1440,7 +1596,7 @@ static int ud_interception(struct vcpu_svm *svm)
 {
         int er;
 
-        er = emulate_instruction(&svm->vcpu, 0, 0, EMULTYPE_TRAP_UD);
+        er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
         if (er != EMULATE_DONE)
                 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
         return 1;
@@ -1449,21 +1605,8 @@ static int ud_interception(struct vcpu_svm *svm)
 static void svm_fpu_activate(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
-        u32 excp;
-
-        if (is_nested(svm)) {
-                u32 h_excp, n_excp;
-
-                h_excp  = svm->nested.hsave->control.intercept_exceptions;
-                n_excp  = svm->nested.intercept_exceptions;
-                h_excp &= ~(1 << NM_VECTOR);
-                excp    = h_excp | n_excp;
-        } else {
-                excp  = svm->vmcb->control.intercept_exceptions;
-                excp &= ~(1 << NM_VECTOR);
-        }
 
-        svm->vmcb->control.intercept_exceptions = excp;
+        clr_exception_intercept(svm, NM_VECTOR);
 
         svm->vcpu.fpu_active = 1;
         update_cr0_intercept(svm);
@@ -1570,7 +1713,7 @@ static int io_interception(struct vcpu_svm *svm)
         string = (io_info & SVM_IOIO_STR_MASK) != 0;
         in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
         if (string || in)
-                return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE;
+                return emulate_instruction(vcpu, 0) == EMULATE_DONE;
 
         port = io_info >> 16;
         size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
@@ -1624,17 +1767,19 @@ static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->control.nested_cr3 = root;
-        force_new_asid(vcpu);
+        mark_dirty(svm->vmcb, VMCB_NPT);
+        svm_flush_tlb(vcpu);
 }
 
-static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu)
+static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
+                                       struct x86_exception *fault)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->control.exit_code = SVM_EXIT_NPF;
         svm->vmcb->control.exit_code_hi = 0;
-        svm->vmcb->control.exit_info_1 = vcpu->arch.fault.error_code;
-        svm->vmcb->control.exit_info_2 = vcpu->arch.fault.address;
+        svm->vmcb->control.exit_info_1 = fault->error_code;
+        svm->vmcb->control.exit_info_2 = fault->address;
 
         nested_svm_vmexit(svm);
 }
@@ -1680,7 +1825,7 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
 {
         int vmexit;
 
-        if (!is_nested(svm))
+        if (!is_guest_mode(&svm->vcpu))
                 return 0;
 
         svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
@@ -1698,7 +1843,7 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
 /* This function returns true if it is save to enable the irq window */
 static inline bool nested_svm_intr(struct vcpu_svm *svm)
 {
-        if (!is_nested(svm))
+        if (!is_guest_mode(&svm->vcpu))
                 return true;
 
         if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
@@ -1737,7 +1882,7 @@ static inline bool nested_svm_intr(struct vcpu_svm *svm)
 /* This function returns true if it is save to enable the nmi window */
 static inline bool nested_svm_nmi(struct vcpu_svm *svm)
 {
-        if (!is_nested(svm))
+        if (!is_guest_mode(&svm->vcpu))
                 return true;
 
         if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
@@ -1836,8 +1981,8 @@ static int nested_svm_exit_special(struct vcpu_svm *svm)
                         return NESTED_EXIT_HOST;
                 break;
         case SVM_EXIT_EXCP_BASE + PF_VECTOR:
-                /* When we're shadowing, trap PFs */
-                if (!npt_enabled)
+                /* When we're shadowing, trap PFs, but not async PF */
+                if (!npt_enabled && svm->apf_reason == 0)
                         return NESTED_EXIT_HOST;
                 break;
         case SVM_EXIT_EXCP_BASE + NM_VECTOR:
@@ -1865,27 +2010,15 @@ static int nested_svm_intercept(struct vcpu_svm *svm)
         case SVM_EXIT_IOIO:
                 vmexit = nested_svm_intercept_ioio(svm);
                 break;
-        case SVM_EXIT_READ_CR0 ... SVM_EXIT_READ_CR8: {
-                u32 cr_bits = 1 << (exit_code - SVM_EXIT_READ_CR0);
-                if (svm->nested.intercept_cr_read & cr_bits)
+        case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
+                u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
+                if (svm->nested.intercept_cr & bit)
                         vmexit = NESTED_EXIT_DONE;
                 break;
         }
-        case SVM_EXIT_WRITE_CR0 ... SVM_EXIT_WRITE_CR8: {
-                u32 cr_bits = 1 << (exit_code - SVM_EXIT_WRITE_CR0);
-                if (svm->nested.intercept_cr_write & cr_bits)
-                        vmexit = NESTED_EXIT_DONE;
-                break;
-        }
-        case SVM_EXIT_READ_DR0 ... SVM_EXIT_READ_DR7: {
-                u32 dr_bits = 1 << (exit_code - SVM_EXIT_READ_DR0);
-                if (svm->nested.intercept_dr_read & dr_bits)
-                        vmexit = NESTED_EXIT_DONE;
-                break;
-        }
-        case SVM_EXIT_WRITE_DR0 ... SVM_EXIT_WRITE_DR7: {
-                u32 dr_bits = 1 << (exit_code - SVM_EXIT_WRITE_DR0);
-                if (svm->nested.intercept_dr_write & dr_bits)
+        case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
+                u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
+                if (svm->nested.intercept_dr & bit)
                         vmexit = NESTED_EXIT_DONE;
                 break;
         }
@@ -1893,6 +2026,10 @@ static int nested_svm_intercept(struct vcpu_svm *svm)
                 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
                 if (svm->nested.intercept_exceptions & excp_bits)
                         vmexit = NESTED_EXIT_DONE;
+                /* async page fault always cause vmexit */
+                else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
+                         svm->apf_reason != 0)
+                        vmexit = NESTED_EXIT_DONE;
                 break;
         }
         case SVM_EXIT_ERR: {
@@ -1926,10 +2063,8 @@ static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *fr
         struct vmcb_control_area *dst  = &dst_vmcb->control;
         struct vmcb_control_area *from = &from_vmcb->control;
 
-        dst->intercept_cr_read    = from->intercept_cr_read;
-        dst->intercept_cr_write   = from->intercept_cr_write;
-        dst->intercept_dr_read    = from->intercept_dr_read;
-        dst->intercept_dr_write   = from->intercept_dr_write;
+        dst->intercept_cr         = from->intercept_cr;
+        dst->intercept_dr         = from->intercept_dr;
         dst->intercept_exceptions = from->intercept_exceptions;
         dst->intercept            = from->intercept;
         dst->iopm_base_pa         = from->iopm_base_pa;
@@ -1970,7 +2105,8 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
         if (!nested_vmcb)
                 return 1;
 
-        /* Exit nested SVM mode */
+        /* Exit Guest-Mode */
+        leave_guest_mode(&svm->vcpu);
         svm->nested.vmcb = 0;
 
         /* Give the current vmcb to the guest */
@@ -1984,7 +2120,7 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
         nested_vmcb->save.idtr   = vmcb->save.idtr;
         nested_vmcb->save.efer   = svm->vcpu.arch.efer;
         nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
-        nested_vmcb->save.cr3    = svm->vcpu.arch.cr3;
+        nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
         nested_vmcb->save.cr2    = vmcb->save.cr2;
         nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
         nested_vmcb->save.rflags = vmcb->save.rflags;
@@ -2061,6 +2197,8 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
         svm->vmcb->save.cpl = 0;
         svm->vmcb->control.exit_int_info = 0;
 
+        mark_all_dirty(svm->vmcb);
+
         nested_svm_unmap(page);
 
         nested_svm_uninit_mmu_context(&svm->vcpu);
@@ -2148,8 +2286,8 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
                                nested_vmcb->control.event_inj,
                                nested_vmcb->control.nested_ctl);
 
-        trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr_read,
-                                    nested_vmcb->control.intercept_cr_write,
+        trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
+                                    nested_vmcb->control.intercept_cr >> 16,
                                     nested_vmcb->control.intercept_exceptions,
                                     nested_vmcb->control.intercept);
 
@@ -2177,7 +2315,7 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
         if (npt_enabled)
                 hsave->save.cr3    = vmcb->save.cr3;
         else
-                hsave->save.cr3    = svm->vcpu.arch.cr3;
+                hsave->save.cr3    = kvm_read_cr3(&svm->vcpu);
 
         copy_vmcb_control_area(hsave, vmcb);
 
@@ -2229,14 +2367,12 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
         svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
 
         /* cache intercepts */
-        svm->nested.intercept_cr_read    = nested_vmcb->control.intercept_cr_read;
-        svm->nested.intercept_cr_write   = nested_vmcb->control.intercept_cr_write;
-        svm->nested.intercept_dr_read    = nested_vmcb->control.intercept_dr_read;
-        svm->nested.intercept_dr_write   = nested_vmcb->control.intercept_dr_write;
+        svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
+        svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
         svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
         svm->nested.intercept            = nested_vmcb->control.intercept;
 
-        force_new_asid(&svm->vcpu);
+        svm_flush_tlb(&svm->vcpu);
         svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
         if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
                 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
@@ -2245,29 +2381,12 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
 
         if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
                 /* We only want the cr8 intercept bits of the guest */
-                svm->vmcb->control.intercept_cr_read &= ~INTERCEPT_CR8_MASK;
-                svm->vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK;
+                clr_cr_intercept(svm, INTERCEPT_CR8_READ);
+                clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
         }
 
         /* We don't want to see VMMCALLs from a nested guest */
-        svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMMCALL);
-
-        /*
-         * We don't want a nested guest to be more powerful than the guest, so
-         * all intercepts are ORed
-         */
-        svm->vmcb->control.intercept_cr_read |=
-                nested_vmcb->control.intercept_cr_read;
-        svm->vmcb->control.intercept_cr_write |=
-                nested_vmcb->control.intercept_cr_write;
-        svm->vmcb->control.intercept_dr_read |=
-                nested_vmcb->control.intercept_dr_read;
-        svm->vmcb->control.intercept_dr_write |=
-                nested_vmcb->control.intercept_dr_write;
-        svm->vmcb->control.intercept_exceptions |=
-                nested_vmcb->control.intercept_exceptions;
-
-        svm->vmcb->control.intercept |= nested_vmcb->control.intercept;
+        clr_intercept(svm, INTERCEPT_VMMCALL);
 
         svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
         svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
@@ -2278,11 +2397,21 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
 
         nested_svm_unmap(page);
 
-        /* nested_vmcb is our indicator if nested SVM is activated */
+        /* Enter Guest-Mode */
+        enter_guest_mode(&svm->vcpu);
+
+        /*
+         * Merge guest and host intercepts - must be called  with vcpu in
+         * guest-mode to take affect here
+         */
+        recalc_intercepts(svm);
+
         svm->nested.vmcb = vmcb_gpa;
 
         enable_gif(svm);
 
+        mark_all_dirty(svm->vmcb);
+
         return true;
 }
 
@@ -2400,6 +2529,8 @@ static int clgi_interception(struct vcpu_svm *svm)
         svm_clear_vintr(svm);
         svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
 
+        mark_dirty(svm->vmcb, VMCB_INTR);
+
         return 1;
 }
 
@@ -2426,6 +2557,19 @@ static int skinit_interception(struct vcpu_svm *svm)
         return 1;
 }
 
+static int xsetbv_interception(struct vcpu_svm *svm)
+{
+        u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
+        u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
+
+        if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
+                svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+                skip_emulated_instruction(&svm->vcpu);
+        }
+
+        return 1;
+}
+
 static int invalid_op_interception(struct vcpu_svm *svm)
 {
         kvm_queue_exception(&svm->vcpu, UD_VECTOR);
@@ -2507,19 +2651,92 @@ static int cpuid_interception(struct vcpu_svm *svm)
 static int iret_interception(struct vcpu_svm *svm)
 {
         ++svm->vcpu.stat.nmi_window_exits;
-        svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_IRET);
+        clr_intercept(svm, INTERCEPT_IRET);
         svm->vcpu.arch.hflags |= HF_IRET_MASK;
         return 1;
 }
 
 static int invlpg_interception(struct vcpu_svm *svm)
 {
-        return emulate_instruction(&svm->vcpu, 0, 0, 0) == EMULATE_DONE;
+        if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
+                return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
+
+        kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
+        skip_emulated_instruction(&svm->vcpu);
+        return 1;
 }
 
 static int emulate_on_interception(struct vcpu_svm *svm)
 {
-        return emulate_instruction(&svm->vcpu, 0, 0, 0) == EMULATE_DONE;
+        return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
+}
+
+#define CR_VALID (1ULL << 63)
+
+static int cr_interception(struct vcpu_svm *svm)
+{
+        int reg, cr;
+        unsigned long val;
+        int err;
+
+        if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
+                return emulate_on_interception(svm);
+
+        if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
+                return emulate_on_interception(svm);
+
+        reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
+        cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
+
+        err = 0;
+        if (cr >= 16) { /* mov to cr */
+                cr -= 16;
+                val = kvm_register_read(&svm->vcpu, reg);
+                switch (cr) {
+                case 0:
+                        err = kvm_set_cr0(&svm->vcpu, val);
+                        break;
+                case 3:
+                        err = kvm_set_cr3(&svm->vcpu, val);
+                        break;
+                case 4:
+                        err = kvm_set_cr4(&svm->vcpu, val);
+                        break;
+                case 8:
+                        err = kvm_set_cr8(&svm->vcpu, val);
+                        break;
+                default:
+                        WARN(1, "unhandled write to CR%d", cr);
+                        kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+                        return 1;
+                }
+        } else { /* mov from cr */
+                switch (cr) {
+                case 0:
+                        val = kvm_read_cr0(&svm->vcpu);
+                        break;
+                case 2:
+                        val = svm->vcpu.arch.cr2;
+                        break;
+                case 3:
+                        val = kvm_read_cr3(&svm->vcpu);
+                        break;
+                case 4:
+                        val = kvm_read_cr4(&svm->vcpu);
+                        break;
+                case 8:
+                        val = kvm_get_cr8(&svm->vcpu);
+                        break;
+                default:
+                        WARN(1, "unhandled read from CR%d", cr);
+                        kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+                        return 1;
+                }
+                kvm_register_write(&svm->vcpu, reg, val);
+        }
+        kvm_complete_insn_gp(&svm->vcpu, err);
+
+        return 1;
 }
 
 static int cr0_write_interception(struct vcpu_svm *svm)
@@ -2527,7 +2744,7 @@ static int cr0_write_interception(struct vcpu_svm *svm)
         struct kvm_vcpu *vcpu = &svm->vcpu;
         int r;
 
-        r = emulate_instruction(&svm->vcpu, 0, 0, 0);
+        r = cr_interception(svm);
 
         if (svm->nested.vmexit_rip) {
                 kvm_register_write(vcpu, VCPU_REGS_RIP, svm->nested.vmexit_rip);
@@ -2536,22 +2753,47 @@ static int cr0_write_interception(struct vcpu_svm *svm)
                 svm->nested.vmexit_rip = 0;
         }
 
-        return r == EMULATE_DONE;
+        return r;
+}
+
+static int dr_interception(struct vcpu_svm *svm)
+{
+        int reg, dr;
+        unsigned long val;
+        int err;
+
+        if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
+                return emulate_on_interception(svm);
+
+        reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
+        dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
+
+        if (dr >= 16) { /* mov to DRn */
+                val = kvm_register_read(&svm->vcpu, reg);
+                kvm_set_dr(&svm->vcpu, dr - 16, val);
+        } else {
+                err = kvm_get_dr(&svm->vcpu, dr, &val);
+                if (!err)
+                        kvm_register_write(&svm->vcpu, reg, val);
+        }
+
+        return 1;
 }
 
 static int cr8_write_interception(struct vcpu_svm *svm)
 {
         struct kvm_run *kvm_run = svm->vcpu.run;
+        int r;
 
         u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
         /* instruction emulation calls kvm_set_cr8() */
-        emulate_instruction(&svm->vcpu, 0, 0, 0);
+        r = cr_interception(svm);
         if (irqchip_in_kernel(svm->vcpu.kvm)) {
-                svm->vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK;
-                return 1;
+                clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+                return r;
         }
         if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
-                return 1;
+                return r;
         kvm_run->exit_reason = KVM_EXIT_SET_TPR;
         return 0;
 }
@@ -2562,14 +2804,9 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
 
         switch (ecx) {
         case MSR_IA32_TSC: {
-                u64 tsc_offset;
+                struct vmcb *vmcb = get_host_vmcb(svm);
 
-                if (is_nested(svm))
-                        tsc_offset = svm->nested.hsave->control.tsc_offset;
-                else
-                        tsc_offset = svm->vmcb->control.tsc_offset;
-
-                *data = tsc_offset + native_read_tsc();
+                *data = vmcb->control.tsc_offset + native_read_tsc();
                 break;
         }
         case MSR_STAR:
@@ -2714,7 +2951,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
                 svm->vmcb->save.sysenter_esp = data;
                 break;
         case MSR_IA32_DEBUGCTLMSR:
-                if (!svm_has(SVM_FEATURE_LBRV)) {
+                if (!boot_cpu_has(X86_FEATURE_LBRV)) {
                         pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
                                         __func__, data);
                         break;
@@ -2723,6 +2960,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
                         return 1;
 
                 svm->vmcb->save.dbgctl = data;
+                mark_dirty(svm->vmcb, VMCB_LBR);
                 if (data & (1ULL<<0))
                         svm_enable_lbrv(svm);
                 else
@@ -2775,6 +3013,7 @@ static int interrupt_window_interception(struct vcpu_svm *svm)
         kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
         svm_clear_vintr(svm);
         svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
+        mark_dirty(svm->vmcb, VMCB_INTR);
         /*
          * If the user space waits to inject interrupts, exit as soon as
          * possible
@@ -2797,31 +3036,31 @@ static int pause_interception(struct vcpu_svm *svm)
 }
 
 static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
-        [SVM_EXIT_READ_CR0]                     = emulate_on_interception,
-        [SVM_EXIT_READ_CR3]                     = emulate_on_interception,
-        [SVM_EXIT_READ_CR4]                     = emulate_on_interception,
-        [SVM_EXIT_READ_CR8]                     = emulate_on_interception,
+        [SVM_EXIT_READ_CR0]                     = cr_interception,
+        [SVM_EXIT_READ_CR3]                     = cr_interception,
+        [SVM_EXIT_READ_CR4]                     = cr_interception,
+        [SVM_EXIT_READ_CR8]                     = cr_interception,
         [SVM_EXIT_CR0_SEL_WRITE]                = emulate_on_interception,
         [SVM_EXIT_WRITE_CR0]                    = cr0_write_interception,
-        [SVM_EXIT_WRITE_CR3]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_CR4]                    = emulate_on_interception,
+        [SVM_EXIT_WRITE_CR3]                    = cr_interception,
+        [SVM_EXIT_WRITE_CR4]                    = cr_interception,
         [SVM_EXIT_WRITE_CR8]                    = cr8_write_interception,
-        [SVM_EXIT_READ_DR0]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR1]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR2]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR3]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR4]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR5]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR6]                     = emulate_on_interception,
-        [SVM_EXIT_READ_DR7]                     = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR0]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR1]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR2]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR3]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR4]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR5]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR6]                    = emulate_on_interception,
-        [SVM_EXIT_WRITE_DR7]                    = emulate_on_interception,
+        [SVM_EXIT_READ_DR0]                     = dr_interception,
+        [SVM_EXIT_READ_DR1]                     = dr_interception,
+        [SVM_EXIT_READ_DR2]                     = dr_interception,
+        [SVM_EXIT_READ_DR3]                     = dr_interception,
+        [SVM_EXIT_READ_DR4]                     = dr_interception,
+        [SVM_EXIT_READ_DR5]                     = dr_interception,
+        [SVM_EXIT_READ_DR6]                     = dr_interception,
+        [SVM_EXIT_READ_DR7]                     = dr_interception,
+        [SVM_EXIT_WRITE_DR0]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR1]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR2]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR3]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR4]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR5]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR6]                    = dr_interception,
+        [SVM_EXIT_WRITE_DR7]                    = dr_interception,
         [SVM_EXIT_EXCP_BASE + DB_VECTOR]        = db_interception,
         [SVM_EXIT_EXCP_BASE + BP_VECTOR]        = bp_interception,
         [SVM_EXIT_EXCP_BASE + UD_VECTOR]        = ud_interception,
@@ -2854,6 +3093,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
         [SVM_EXIT_WBINVD]                       = emulate_on_interception,
         [SVM_EXIT_MONITOR]                      = invalid_op_interception,
         [SVM_EXIT_MWAIT]                        = invalid_op_interception,
+        [SVM_EXIT_XSETBV]                       = xsetbv_interception,
         [SVM_EXIT_NPF]                          = pf_interception,
 };
 
@@ -2864,10 +3104,10 @@ void dump_vmcb(struct kvm_vcpu *vcpu)
         struct vmcb_save_area *save = &svm->vmcb->save;
 
         pr_err("VMCB Control Area:\n");
-        pr_err("cr_read:            %04x\n", control->intercept_cr_read);
-        pr_err("cr_write:           %04x\n", control->intercept_cr_write);
-        pr_err("dr_read:            %04x\n", control->intercept_dr_read);
-        pr_err("dr_write:           %04x\n", control->intercept_dr_write);
+        pr_err("cr_read:            %04x\n", control->intercept_cr & 0xffff);
+        pr_err("cr_write:           %04x\n", control->intercept_cr >> 16);
+        pr_err("dr_read:            %04x\n", control->intercept_dr & 0xffff);
+        pr_err("dr_write:           %04x\n", control->intercept_dr >> 16);
         pr_err("exceptions:         %08x\n", control->intercept_exceptions);
         pr_err("intercepts:         %016llx\n", control->intercept);
         pr_err("pause filter count: %d\n", control->pause_filter_count);
@@ -2950,15 +3190,23 @@ void dump_vmcb(struct kvm_vcpu *vcpu)
 
 }
 
+static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
+{
+        struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
+
+        *info1 = control->exit_info_1;
+        *info2 = control->exit_info_2;
+}
+
 static int handle_exit(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
         struct kvm_run *kvm_run = vcpu->run;
         u32 exit_code = svm->vmcb->control.exit_code;
 
-        trace_kvm_exit(exit_code, vcpu);
+        trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);
 
-        if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR0_MASK))
+        if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
                 vcpu->arch.cr0 = svm->vmcb->save.cr0;
         if (npt_enabled)
                 vcpu->arch.cr3 = svm->vmcb->save.cr3;
@@ -2970,7 +3218,7 @@ static int handle_exit(struct kvm_vcpu *vcpu)
                 return 1;
         }
 
-        if (is_nested(svm)) {
+        if (is_guest_mode(vcpu)) {
                 int vmexit;
 
                 trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
@@ -3033,7 +3281,6 @@ static void pre_svm_run(struct vcpu_svm *svm)
 
         struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
 
-        svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
         /* FIXME: handle wraparound of asid_generation */
         if (svm->asid_generation != sd->asid_generation)
                 new_asid(svm, sd);
@@ -3045,7 +3292,7 @@ static void svm_inject_nmi(struct kvm_vcpu *vcpu)
 
         svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
         vcpu->arch.hflags |= HF_NMI_MASK;
-        svm->vmcb->control.intercept |= (1ULL << INTERCEPT_IRET);
+        set_intercept(svm, INTERCEPT_IRET);
         ++vcpu->stat.nmi_injections;
 }
 
@@ -3058,6 +3305,7 @@ static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
         control->int_ctl &= ~V_INTR_PRIO_MASK;
         control->int_ctl |= V_IRQ_MASK |
                 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
+        mark_dirty(svm->vmcb, VMCB_INTR);
 }
 
 static void svm_set_irq(struct kvm_vcpu *vcpu)
@@ -3077,14 +3325,14 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
 
-        if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))
+        if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
                 return;
 
         if (irr == -1)
                 return;
 
         if (tpr >= irr)
-                svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR8_MASK;
+                set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
 }
 
 static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
@@ -3112,10 +3360,10 @@ static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
 
         if (masked) {
                 svm->vcpu.arch.hflags |= HF_NMI_MASK;
-                svm->vmcb->control.intercept |= (1ULL << INTERCEPT_IRET);
+                set_intercept(svm, INTERCEPT_IRET);
         } else {
                 svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
-                svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_IRET);
+                clr_intercept(svm, INTERCEPT_IRET);
         }
 }
 
@@ -3131,7 +3379,7 @@ static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
 
         ret = !!(vmcb->save.rflags & X86_EFLAGS_IF);
 
-        if (is_nested(svm))
+        if (is_guest_mode(vcpu))
                 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
 
         return ret;
@@ -3177,7 +3425,12 @@ static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
 
 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
 {
-        force_new_asid(vcpu);
+        struct vcpu_svm *svm = to_svm(vcpu);
+
+        if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
+                svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
+        else
+                svm->asid_generation--;
 }
 
 static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
@@ -3188,10 +3441,10 @@ static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
 
-        if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))
+        if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
                 return;
 
-        if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR8_MASK)) {
+        if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
                 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
                 kvm_set_cr8(vcpu, cr8);
         }
@@ -3202,7 +3455,7 @@ static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
         struct vcpu_svm *svm = to_svm(vcpu);
         u64 cr8;
 
-        if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))
+        if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
                 return;
 
         cr8 = kvm_get_cr8(vcpu);
@@ -3289,9 +3542,6 @@ static void svm_cancel_injection(struct kvm_vcpu *vcpu)
 static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
-        u16 fs_selector;
-        u16 gs_selector;
-        u16 ldt_selector;
 
         svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
         svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
@@ -3308,10 +3558,6 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 
         sync_lapic_to_cr8(vcpu);
 
-        save_host_msrs(vcpu);
-        savesegment(fs, fs_selector);
-        savesegment(gs, gs_selector);
-        ldt_selector = kvm_read_ldt();
         svm->vmcb->save.cr2 = vcpu->arch.cr2;
 
         clgi();
@@ -3389,19 +3635,10 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 #endif
                 );
 
-        vcpu->arch.cr2 = svm->vmcb->save.cr2;
-        vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
-        vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
-        vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
-
-        load_host_msrs(vcpu);
-        kvm_load_ldt(ldt_selector);
-        loadsegment(fs, fs_selector);
 #ifdef CONFIG_X86_64
-        load_gs_index(gs_selector);
-        wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
+        wrmsrl(MSR_GS_BASE, svm->host.gs_base);
 #else
-        loadsegment(gs, gs_selector);
+        loadsegment(fs, svm->host.fs);
 #endif
 
         reload_tss(vcpu);
@@ -3410,10 +3647,21 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 
         stgi();
 
+        vcpu->arch.cr2 = svm->vmcb->save.cr2;
+        vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
+        vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
+        vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
+
         sync_cr8_to_lapic(vcpu);
 
         svm->next_rip = 0;
 
+        svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
+
+        /* if exit due to PF check for async PF */
+        if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
+                svm->apf_reason = kvm_read_and_reset_pf_reason();
+
         if (npt_enabled) {
                 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
                 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
@@ -3426,6 +3674,8 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
         if (unlikely(svm->vmcb->control.exit_code ==
                      SVM_EXIT_EXCP_BASE + MC_VECTOR))
                 svm_handle_mce(svm);
+
+        mark_all_clean(svm->vmcb);
 }
 
 #undef R
@@ -3435,7 +3685,8 @@ static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->save.cr3 = root;
-        force_new_asid(vcpu);
+        mark_dirty(svm->vmcb, VMCB_CR);
+        svm_flush_tlb(vcpu);
 }
 
 static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
@@ -3443,11 +3694,13 @@ static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->control.nested_cr3 = root;
+        mark_dirty(svm->vmcb, VMCB_NPT);
 
         /* Also sync guest cr3 here in case we live migrate */
-        svm->vmcb->save.cr3 = vcpu->arch.cr3;
+        svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
+        mark_dirty(svm->vmcb, VMCB_CR);
 
-        force_new_asid(vcpu);
+        svm_flush_tlb(vcpu);
 }
 
 static int is_disabled(void)
@@ -3494,10 +3747,6 @@ static void svm_cpuid_update(struct kvm_vcpu *vcpu)
 static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
 {
         switch (func) {
-        case 0x00000001:
-                /* Mask out xsave bit as long as it is not supported by SVM */
-                entry->ecx &= ~(bit(X86_FEATURE_XSAVE));
-                break;
         case 0x80000001:
                 if (nested)
                         entry->ecx |= (1 << 2); /* Set SVM bit */
@@ -3511,7 +3760,7 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
                                    additional features */
 
                 /* Support next_rip if host supports it */
-                if (svm_has(SVM_FEATURE_NRIP))
+                if (boot_cpu_has(X86_FEATURE_NRIPS))
                         entry->edx |= SVM_FEATURE_NRIP;
 
                 /* Support NPT for the guest if enabled */
@@ -3571,6 +3820,7 @@ static const struct trace_print_flags svm_exit_reasons_str[] = {
         { SVM_EXIT_WBINVD,                      "wbinvd" },
         { SVM_EXIT_MONITOR,                     "monitor" },
         { SVM_EXIT_MWAIT,                       "mwait" },
+        { SVM_EXIT_XSETBV,                      "xsetbv" },
         { SVM_EXIT_NPF,                         "npf" },
         { -1, NULL }
 };
@@ -3594,9 +3844,7 @@ static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
 
-        svm->vmcb->control.intercept_exceptions |= 1 << NM_VECTOR;
-        if (is_nested(svm))
-                svm->nested.hsave->control.intercept_exceptions |= 1 << NM_VECTOR;
+        set_exception_intercept(svm, NM_VECTOR);
         update_cr0_intercept(svm);
 }
 
@@ -3627,6 +3875,7 @@ static struct kvm_x86_ops svm_x86_ops = {
         .get_cpl = svm_get_cpl,
         .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
         .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
+        .decache_cr3 = svm_decache_cr3,
         .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
         .set_cr0 = svm_set_cr0,
         .set_cr3 = svm_set_cr3,
@@ -3667,7 +3916,9 @@ static struct kvm_x86_ops svm_x86_ops = {
         .get_tdp_level = get_npt_level,
         .get_mt_mask = svm_get_mt_mask,
 
+        .get_exit_info = svm_get_exit_info,
         .exit_reasons_str = svm_exit_reasons_str,
+
         .get_lpage_level = svm_get_lpage_level,
 
         .cpuid_update = svm_cpuid_update,
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index a6544b8e7c0f..1357d7cf4ec8 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -178,27 +178,36 @@ TRACE_EVENT(kvm_apic,
 #define trace_kvm_apic_read(reg, val)           trace_kvm_apic(0, reg, val)
 #define trace_kvm_apic_write(reg, val)          trace_kvm_apic(1, reg, val)
 
+#define KVM_ISA_VMX   1
+#define KVM_ISA_SVM   2
+
 /*
  * Tracepoint for kvm guest exit:
  */
 TRACE_EVENT(kvm_exit,
-        TP_PROTO(unsigned int exit_reason, struct kvm_vcpu *vcpu),
-        TP_ARGS(exit_reason, vcpu),
+        TP_PROTO(unsigned int exit_reason, struct kvm_vcpu *vcpu, u32 isa),
+        TP_ARGS(exit_reason, vcpu, isa),
 
         TP_STRUCT__entry(
                 __field(        unsigned int,   exit_reason     )
                 __field(        unsigned long,  guest_rip       )
+                __field(        u32,            isa             )
+                __field(        u64,            info1           )
+                __field(        u64,            info2           )
         ),
 
         TP_fast_assign(
                 __entry->exit_reason    = exit_reason;
                 __entry->guest_rip      = kvm_rip_read(vcpu);
+                __entry->isa            = isa;
+                kvm_x86_ops->get_exit_info(vcpu, &__entry->info1,
+                                           &__entry->info2);
         ),
 
-        TP_printk("reason %s rip 0x%lx",
+        TP_printk("reason %s rip 0x%lx info %llx %llx",
                  ftrace_print_symbols_seq(p, __entry->exit_reason,
                                           kvm_x86_ops->exit_reasons_str),
-                 __entry->guest_rip)
+                 __entry->guest_rip, __entry->info1, __entry->info2)
 );
 
 /*
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 81fcbe9515c5..bf89ec2cfb82 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -69,6 +69,9 @@ module_param(emulate_invalid_guest_state, bool, S_IRUGO);
 static int __read_mostly vmm_exclusive = 1;
 module_param(vmm_exclusive, bool, S_IRUGO);
 
+static int __read_mostly yield_on_hlt = 1;
+module_param(yield_on_hlt, bool, S_IRUGO);
+
 #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST                           \
         (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
 #define KVM_GUEST_CR0_MASK                                              \
@@ -177,6 +180,7 @@ static int init_rmode(struct kvm *kvm);
 static u64 construct_eptp(unsigned long root_hpa);
 static void kvm_cpu_vmxon(u64 addr);
 static void kvm_cpu_vmxoff(void);
+static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 
 static DEFINE_PER_CPU(struct vmcs *, vmxarea);
 static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
@@ -188,6 +192,8 @@ static unsigned long *vmx_io_bitmap_b;
 static unsigned long *vmx_msr_bitmap_legacy;
 static unsigned long *vmx_msr_bitmap_longmode;
 
+static bool cpu_has_load_ia32_efer;
+
 static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
 static DEFINE_SPINLOCK(vmx_vpid_lock);
 
@@ -472,7 +478,7 @@ static void vmcs_clear(struct vmcs *vmcs)
         u8 error;
 
         asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
-                      : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
+                      : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
                       : "cc", "memory");
         if (error)
                 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
@@ -485,7 +491,7 @@ static void vmcs_load(struct vmcs *vmcs)
         u8 error;
 
         asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
-                        : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
+                        : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
                         : "cc", "memory");
         if (error)
                 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
@@ -565,10 +571,10 @@ static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
 
 static unsigned long vmcs_readl(unsigned long field)
 {
-        unsigned long value;
+        unsigned long value = 0;
 
         asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
-                      : "=a"(value) : "d"(field) : "cc");
+                      : "+a"(value) : "d"(field) : "cc");
         return value;
 }
 
@@ -661,6 +667,12 @@ static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
         unsigned i;
         struct msr_autoload *m = &vmx->msr_autoload;
 
+        if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
+                vmcs_clear_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
+                vmcs_clear_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
+                return;
+        }
+
         for (i = 0; i < m->nr; ++i)
                 if (m->guest[i].index == msr)
                         break;
@@ -680,6 +692,14 @@ static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
         unsigned i;
         struct msr_autoload *m = &vmx->msr_autoload;
 
+        if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
+                vmcs_write64(GUEST_IA32_EFER, guest_val);
+                vmcs_write64(HOST_IA32_EFER, host_val);
+                vmcs_set_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
+                vmcs_set_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
+                return;
+        }
+
         for (i = 0; i < m->nr; ++i)
                 if (m->guest[i].index == msr)
                         break;
@@ -1009,6 +1029,17 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
         vmx_set_interrupt_shadow(vcpu, 0);
 }
 
+static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
+{
+        /* Ensure that we clear the HLT state in the VMCS.  We don't need to
+         * explicitly skip the instruction because if the HLT state is set, then
+         * the instruction is already executing and RIP has already been
+         * advanced. */
+        if (!yield_on_hlt &&
+            vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT)
+                vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
+}
+
 static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
                                 bool has_error_code, u32 error_code,
                                 bool reinject)
@@ -1035,6 +1066,7 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
                 intr_info |= INTR_TYPE_HARD_EXCEPTION;
 
         vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
+        vmx_clear_hlt(vcpu);
 }
 
 static bool vmx_rdtscp_supported(void)
@@ -1305,8 +1337,11 @@ static __init int vmx_disabled_by_bios(void)
                         && tboot_enabled())
                         return 1;
                 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
-                        && !tboot_enabled())
+                        && !tboot_enabled()) {
+                        printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
+                                " activate TXT before enabling KVM\n");
                         return 1;
+                }
         }
 
         return 0;
@@ -1400,6 +1435,14 @@ static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
         return 0;
 }
 
+static __init bool allow_1_setting(u32 msr, u32 ctl)
+{
+        u32 vmx_msr_low, vmx_msr_high;
+
+        rdmsr(msr, vmx_msr_low, vmx_msr_high);
+        return vmx_msr_high & ctl;
+}
+
 static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
 {
         u32 vmx_msr_low, vmx_msr_high;
@@ -1416,7 +1459,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
                                 &_pin_based_exec_control) < 0)
                 return -EIO;
 
-        min = CPU_BASED_HLT_EXITING |
+        min =
 #ifdef CONFIG_X86_64
               CPU_BASED_CR8_LOAD_EXITING |
               CPU_BASED_CR8_STORE_EXITING |
@@ -1429,6 +1472,10 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
               CPU_BASED_MWAIT_EXITING |
               CPU_BASED_MONITOR_EXITING |
               CPU_BASED_INVLPG_EXITING;
+
+        if (yield_on_hlt)
+                min |= CPU_BASED_HLT_EXITING;
+
         opt = CPU_BASED_TPR_SHADOW |
               CPU_BASED_USE_MSR_BITMAPS |
               CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
@@ -1510,6 +1557,12 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
         vmcs_conf->vmexit_ctrl         = _vmexit_control;
         vmcs_conf->vmentry_ctrl        = _vmentry_control;
 
+        cpu_has_load_ia32_efer =
+                allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
+                                VM_ENTRY_LOAD_IA32_EFER)
+                && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS,
+                                   VM_EXIT_LOAD_IA32_EFER);
+
         return 0;
 }
 
@@ -1683,9 +1736,13 @@ static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
         save->limit = vmcs_read32(sf->limit);
         save->ar = vmcs_read32(sf->ar_bytes);
         vmcs_write16(sf->selector, save->base >> 4);
-        vmcs_write32(sf->base, save->base & 0xfffff);
+        vmcs_write32(sf->base, save->base & 0xffff0);
         vmcs_write32(sf->limit, 0xffff);
         vmcs_write32(sf->ar_bytes, 0xf3);
+        if (save->base & 0xf)
+                printk_once(KERN_WARNING "kvm: segment base is not paragraph"
+                            " aligned when entering protected mode (seg=%d)",
+                            seg);
 }
 
 static void enter_rmode(struct kvm_vcpu *vcpu)
@@ -1814,6 +1871,13 @@ static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
         vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
 }
 
+static void vmx_decache_cr3(struct kvm_vcpu *vcpu)
+{
+        if (enable_ept && is_paging(vcpu))
+                vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
+        __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
+}
+
 static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
 {
         ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
@@ -1857,6 +1921,7 @@ static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
                                         unsigned long cr0,
                                         struct kvm_vcpu *vcpu)
 {
+        vmx_decache_cr3(vcpu);
         if (!(cr0 & X86_CR0_PG)) {
                 /* From paging/starting to nonpaging */
                 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
@@ -1937,7 +2002,7 @@ static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
         if (enable_ept) {
                 eptp = construct_eptp(cr3);
                 vmcs_write64(EPT_POINTER, eptp);
-                guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
+                guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) :
                         vcpu->kvm->arch.ept_identity_map_addr;
                 ept_load_pdptrs(vcpu);
         }
@@ -2725,7 +2790,7 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
         vmcs_writel(GUEST_IDTR_BASE, 0);
         vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
 
-        vmcs_write32(GUEST_ACTIVITY_STATE, 0);
+        vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
         vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
         vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
 
@@ -2787,6 +2852,10 @@ static void enable_nmi_window(struct kvm_vcpu *vcpu)
                 return;
         }
 
+        if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) {
+                enable_irq_window(vcpu);
+                return;
+        }
         cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
         cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
         vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
@@ -2814,6 +2883,7 @@ static void vmx_inject_irq(struct kvm_vcpu *vcpu)
         } else
                 intr |= INTR_TYPE_EXT_INTR;
         vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
+        vmx_clear_hlt(vcpu);
 }
 
 static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
@@ -2841,6 +2911,7 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
         }
         vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
                         INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
+        vmx_clear_hlt(vcpu);
 }
 
 static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
@@ -2849,7 +2920,8 @@ static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
                 return 0;
 
         return  !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
-                        (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_NMI));
+                  (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI
+                   | GUEST_INTR_STATE_NMI));
 }
 
 static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
@@ -2910,7 +2982,7 @@ static int handle_rmode_exception(struct kvm_vcpu *vcpu,
          * Cause the #SS fault with 0 error code in VM86 mode.
          */
         if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
-                if (emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE)
+                if (emulate_instruction(vcpu, 0) == EMULATE_DONE)
                         return 1;
         /*
          * Forward all other exceptions that are valid in real mode.
@@ -3007,7 +3079,7 @@ static int handle_exception(struct kvm_vcpu *vcpu)
         }
 
         if (is_invalid_opcode(intr_info)) {
-                er = emulate_instruction(vcpu, 0, 0, EMULTYPE_TRAP_UD);
+                er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
                 if (er != EMULATE_DONE)
                         kvm_queue_exception(vcpu, UD_VECTOR);
                 return 1;
@@ -3026,7 +3098,7 @@ static int handle_exception(struct kvm_vcpu *vcpu)
 
                 if (kvm_event_needs_reinjection(vcpu))
                         kvm_mmu_unprotect_page_virt(vcpu, cr2);
-                return kvm_mmu_page_fault(vcpu, cr2, error_code);
+                return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0);
         }
 
         if (vmx->rmode.vm86_active &&
@@ -3098,7 +3170,7 @@ static int handle_io(struct kvm_vcpu *vcpu)
         ++vcpu->stat.io_exits;
 
         if (string || in)
-                return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE;
+                return emulate_instruction(vcpu, 0) == EMULATE_DONE;
 
         port = exit_qualification >> 16;
         size = (exit_qualification & 7) + 1;
@@ -3118,14 +3190,6 @@ vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
         hypercall[2] = 0xc1;
 }
 
-static void complete_insn_gp(struct kvm_vcpu *vcpu, int err)
-{
-        if (err)
-                kvm_inject_gp(vcpu, 0);
-        else
-                skip_emulated_instruction(vcpu);
-}
-
 static int handle_cr(struct kvm_vcpu *vcpu)
 {
         unsigned long exit_qualification, val;
@@ -3143,21 +3207,21 @@ static int handle_cr(struct kvm_vcpu *vcpu)
                 switch (cr) {
                 case 0:
                         err = kvm_set_cr0(vcpu, val);
-                        complete_insn_gp(vcpu, err);
+                        kvm_complete_insn_gp(vcpu, err);
                         return 1;
                 case 3:
                         err = kvm_set_cr3(vcpu, val);
-                        complete_insn_gp(vcpu, err);
+                        kvm_complete_insn_gp(vcpu, err);
                         return 1;
                 case 4:
                         err = kvm_set_cr4(vcpu, val);
-                        complete_insn_gp(vcpu, err);
+                        kvm_complete_insn_gp(vcpu, err);
                         return 1;
                 case 8: {
                                 u8 cr8_prev = kvm_get_cr8(vcpu);
                                 u8 cr8 = kvm_register_read(vcpu, reg);
-                                kvm_set_cr8(vcpu, cr8);
-                                skip_emulated_instruction(vcpu);
+                                err = kvm_set_cr8(vcpu, cr8);
+                                kvm_complete_insn_gp(vcpu, err);
                                 if (irqchip_in_kernel(vcpu->kvm))
                                         return 1;
                                 if (cr8_prev <= cr8)
@@ -3176,8 +3240,9 @@ static int handle_cr(struct kvm_vcpu *vcpu)
         case 1: /*mov from cr*/
                 switch (cr) {
                 case 3:
-                        kvm_register_write(vcpu, reg, vcpu->arch.cr3);
-                        trace_kvm_cr_read(cr, vcpu->arch.cr3);
+                        val = kvm_read_cr3(vcpu);
+                        kvm_register_write(vcpu, reg, val);
+                        trace_kvm_cr_read(cr, val);
                         skip_emulated_instruction(vcpu);
                         return 1;
                 case 8:
@@ -3349,6 +3414,11 @@ static int handle_vmx_insn(struct kvm_vcpu *vcpu)
         return 1;
 }
 
+static int handle_invd(struct kvm_vcpu *vcpu)
+{
+        return emulate_instruction(vcpu, 0) == EMULATE_DONE;
+}
+
 static int handle_invlpg(struct kvm_vcpu *vcpu)
 {
         unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
@@ -3377,7 +3447,7 @@ static int handle_xsetbv(struct kvm_vcpu *vcpu)
 
 static int handle_apic_access(struct kvm_vcpu *vcpu)
 {
-        return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE;
+        return emulate_instruction(vcpu, 0) == EMULATE_DONE;
 }
 
 static int handle_task_switch(struct kvm_vcpu *vcpu)
@@ -3476,7 +3546,7 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
 
         gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
         trace_kvm_page_fault(gpa, exit_qualification);
-        return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
+        return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0);
 }
 
 static u64 ept_rsvd_mask(u64 spte, int level)
@@ -3592,7 +3662,7 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
                     && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF))
                         return handle_interrupt_window(&vmx->vcpu);
 
-                err = emulate_instruction(vcpu, 0, 0, 0);
+                err = emulate_instruction(vcpu, 0);
 
                 if (err == EMULATE_DO_MMIO) {
                         ret = 0;
@@ -3649,6 +3719,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
         [EXIT_REASON_MSR_WRITE]               = handle_wrmsr,
         [EXIT_REASON_PENDING_INTERRUPT]       = handle_interrupt_window,
         [EXIT_REASON_HLT]                     = handle_halt,
+        [EXIT_REASON_INVD]                    = handle_invd,
         [EXIT_REASON_INVLPG]                  = handle_invlpg,
         [EXIT_REASON_VMCALL]                  = handle_vmcall,
         [EXIT_REASON_VMCLEAR]                 = handle_vmx_insn,
@@ -3676,6 +3747,12 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
 static const int kvm_vmx_max_exit_handlers =
         ARRAY_SIZE(kvm_vmx_exit_handlers);
 
+static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
+{
+        *info1 = vmcs_readl(EXIT_QUALIFICATION);
+        *info2 = vmcs_read32(VM_EXIT_INTR_INFO);
+}
+
 /*
  * The guest has exited.  See if we can fix it or if we need userspace
  * assistance.
@@ -3686,17 +3763,12 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu)
         u32 exit_reason = vmx->exit_reason;
         u32 vectoring_info = vmx->idt_vectoring_info;
 
-        trace_kvm_exit(exit_reason, vcpu);
+        trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX);
 
         /* If guest state is invalid, start emulating */
         if (vmx->emulation_required && emulate_invalid_guest_state)
                 return handle_invalid_guest_state(vcpu);
 
-        /* Access CR3 don't cause VMExit in paging mode, so we need
-         * to sync with guest real CR3. */
-        if (enable_ept && is_paging(vcpu))
-                vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
-
         if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) {
                 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
                 vcpu->run->fail_entry.hardware_entry_failure_reason
@@ -4013,7 +4085,8 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
               );
 
         vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
-                                  | (1 << VCPU_EXREG_PDPTR));
+                                  | (1 << VCPU_EXREG_PDPTR)
+                                  | (1 << VCPU_EXREG_CR3));
         vcpu->arch.regs_dirty = 0;
 
         vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
@@ -4280,6 +4353,7 @@ static struct kvm_x86_ops vmx_x86_ops = {
         .get_cpl = vmx_get_cpl,
         .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
         .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
+        .decache_cr3 = vmx_decache_cr3,
         .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
         .set_cr0 = vmx_set_cr0,
         .set_cr3 = vmx_set_cr3,
@@ -4320,7 +4394,9 @@ static struct kvm_x86_ops vmx_x86_ops = {
         .get_tdp_level = get_ept_level,
         .get_mt_mask = vmx_get_mt_mask,
 
+        .get_exit_info = vmx_get_exit_info,
         .exit_reasons_str = vmx_exit_reasons_str,
+
         .get_lpage_level = vmx_get_lpage_level,
 
         .cpuid_update = vmx_cpuid_update,
@@ -4396,8 +4472,6 @@ static int __init vmx_init(void)
 
         if (enable_ept) {
                 bypass_guest_pf = 0;
-                kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
-                        VMX_EPT_WRITABLE_MASK);
                 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
                                 VMX_EPT_EXECUTABLE_MASK);
                 kvm_enable_tdp();
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 46a368cb651e..bcc0efce85bf 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -43,6 +43,7 @@
 #include <linux/slab.h>
 #include <linux/perf_event.h>
 #include <linux/uaccess.h>
+#include <linux/hash.h>
 #include <trace/events/kvm.h>
 
 #define CREATE_TRACE_POINTS
@@ -155,6 +156,13 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 
 u64 __read_mostly host_xcr0;
 
+static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu)
+{
+        int i;
+        for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++)
+                vcpu->arch.apf.gfns[i] = ~0;
+}
+
 static void kvm_on_user_return(struct user_return_notifier *urn)
 {
         unsigned slot;
@@ -326,23 +334,28 @@ void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr)
 }
 EXPORT_SYMBOL_GPL(kvm_requeue_exception);
 
-void kvm_inject_page_fault(struct kvm_vcpu *vcpu)
+void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err)
 {
-        unsigned error_code = vcpu->arch.fault.error_code;
+        if (err)
+                kvm_inject_gp(vcpu, 0);
+        else
+                kvm_x86_ops->skip_emulated_instruction(vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_complete_insn_gp);
 
+void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
+{
         ++vcpu->stat.pf_guest;
-        vcpu->arch.cr2 = vcpu->arch.fault.address;
-        kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
+        vcpu->arch.cr2 = fault->address;
+        kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code);
 }
 
-void kvm_propagate_fault(struct kvm_vcpu *vcpu)
+void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
 {
-        if (mmu_is_nested(vcpu) && !vcpu->arch.fault.nested)
-                vcpu->arch.nested_mmu.inject_page_fault(vcpu);
+        if (mmu_is_nested(vcpu) && !fault->nested_page_fault)
+                vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault);
         else
-                vcpu->arch.mmu.inject_page_fault(vcpu);
-
-        vcpu->arch.fault.nested = false;
+                vcpu->arch.mmu.inject_page_fault(vcpu, fault);
 }
 
 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
@@ -460,8 +473,8 @@ static bool pdptrs_changed(struct kvm_vcpu *vcpu)
                       (unsigned long *)&vcpu->arch.regs_avail))
                 return true;
 
-        gfn = (vcpu->arch.cr3 & ~31u) >> PAGE_SHIFT;
-        offset = (vcpu->arch.cr3 & ~31u) & (PAGE_SIZE - 1);
+        gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT;
+        offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1);
         r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte),
                                        PFERR_USER_MASK | PFERR_WRITE_MASK);
         if (r < 0)
@@ -506,12 +519,15 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
                 } else
 #endif
                 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
-                                                 vcpu->arch.cr3))
+                                                 kvm_read_cr3(vcpu)))
                         return 1;
         }
 
         kvm_x86_ops->set_cr0(vcpu, cr0);
 
+        if ((cr0 ^ old_cr0) & X86_CR0_PG)
+                kvm_clear_async_pf_completion_queue(vcpu);
+
         if ((cr0 ^ old_cr0) & update_bits)
                 kvm_mmu_reset_context(vcpu);
         return 0;
@@ -595,7 +611,8 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
                         return 1;
         } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
                    && ((cr4 ^ old_cr4) & pdptr_bits)
-                   && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3))
+                   && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
+                                   kvm_read_cr3(vcpu)))
                 return 1;
 
         if (cr4 & X86_CR4_VMXE)
@@ -615,7 +632,7 @@ EXPORT_SYMBOL_GPL(kvm_set_cr4);
 
 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
 {
-        if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
+        if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) {
                 kvm_mmu_sync_roots(vcpu);
                 kvm_mmu_flush_tlb(vcpu);
                 return 0;
@@ -650,12 +667,13 @@ int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
         if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
                 return 1;
         vcpu->arch.cr3 = cr3;
+        __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
         vcpu->arch.mmu.new_cr3(vcpu);
         return 0;
 }
 EXPORT_SYMBOL_GPL(kvm_set_cr3);
 
-int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
+int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
 {
         if (cr8 & CR8_RESERVED_BITS)
                 return 1;
@@ -665,12 +683,6 @@ int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
                 vcpu->arch.cr8 = cr8;
         return 0;
 }
-
-void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
-{
-        if (__kvm_set_cr8(vcpu, cr8))
-                kvm_inject_gp(vcpu, 0);
-}
 EXPORT_SYMBOL_GPL(kvm_set_cr8);
 
 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
@@ -775,12 +787,12 @@ EXPORT_SYMBOL_GPL(kvm_get_dr);
  * kvm-specific. Those are put in the beginning of the list.
  */
 
-#define KVM_SAVE_MSRS_BEGIN     7
+#define KVM_SAVE_MSRS_BEGIN     8
 static u32 msrs_to_save[] = {
         MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
         MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
         HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
-        HV_X64_MSR_APIC_ASSIST_PAGE,
+        HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN,
         MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
         MSR_STAR,
 #ifdef CONFIG_X86_64
@@ -830,7 +842,6 @@ static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
         kvm_x86_ops->set_efer(vcpu, efer);
 
         vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
-        kvm_mmu_reset_context(vcpu);
 
         /* Update reserved bits */
         if ((efer ^ old_efer) & EFER_NX)
@@ -1418,6 +1429,30 @@ static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
         return 0;
 }
 
+static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
+{
+        gpa_t gpa = data & ~0x3f;
+
+        /* Bits 2:5 are resrved, Should be zero */
+        if (data & 0x3c)
+                return 1;
+
+        vcpu->arch.apf.msr_val = data;
+
+        if (!(data & KVM_ASYNC_PF_ENABLED)) {
+                kvm_clear_async_pf_completion_queue(vcpu);
+                kvm_async_pf_hash_reset(vcpu);
+                return 0;
+        }
+
+        if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa))
+                return 1;
+
+        vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS);
+        kvm_async_pf_wakeup_all(vcpu);
+        return 0;
+}
+
 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
 {
         switch (msr) {
@@ -1499,6 +1534,10 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
                 }
                 break;
         }
+        case MSR_KVM_ASYNC_PF_EN:
+                if (kvm_pv_enable_async_pf(vcpu, data))
+                        return 1;
+                break;
         case MSR_IA32_MCG_CTL:
         case MSR_IA32_MCG_STATUS:
         case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
@@ -1775,6 +1814,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
         case MSR_KVM_SYSTEM_TIME_NEW:
                 data = vcpu->arch.time;
                 break;
+        case MSR_KVM_ASYNC_PF_EN:
+                data = vcpu->arch.apf.msr_val;
+                break;
         case MSR_IA32_P5_MC_ADDR:
         case MSR_IA32_P5_MC_TYPE:
         case MSR_IA32_MCG_CAP:
@@ -1904,6 +1946,7 @@ int kvm_dev_ioctl_check_extension(long ext)
         case KVM_CAP_NOP_IO_DELAY:
         case KVM_CAP_MP_STATE:
         case KVM_CAP_SYNC_MMU:
+        case KVM_CAP_USER_NMI:
         case KVM_CAP_REINJECT_CONTROL:
         case KVM_CAP_IRQ_INJECT_STATUS:
         case KVM_CAP_ASSIGN_DEV_IRQ:
@@ -1922,6 +1965,7 @@ int kvm_dev_ioctl_check_extension(long ext)
         case KVM_CAP_DEBUGREGS:
         case KVM_CAP_X86_ROBUST_SINGLESTEP:
         case KVM_CAP_XSAVE:
+        case KVM_CAP_ASYNC_PF:
                 r = 1;
                 break;
         case KVM_CAP_COALESCED_MMIO:
@@ -2185,6 +2229,11 @@ out:
         return r;
 }
 
+static void cpuid_mask(u32 *word, int wordnum)
+{
+        *word &= boot_cpu_data.x86_capability[wordnum];
+}
+
 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                            u32 index)
 {
@@ -2259,7 +2308,9 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                 break;
         case 1:
                 entry->edx &= kvm_supported_word0_x86_features;
+                cpuid_mask(&entry->edx, 0);
                 entry->ecx &= kvm_supported_word4_x86_features;
+                cpuid_mask(&entry->ecx, 4);
                 /* we support x2apic emulation even if host does not support
                  * it since we emulate x2apic in software */
                 entry->ecx |= F(X2APIC);
@@ -2350,7 +2401,9 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                 break;
         case 0x80000001:
                 entry->edx &= kvm_supported_word1_x86_features;
+                cpuid_mask(&entry->edx, 1);
                 entry->ecx &= kvm_supported_word6_x86_features;
+                cpuid_mask(&entry->ecx, 6);
                 break;
         }
 
@@ -3169,20 +3222,18 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
                 struct kvm_memslots *slots, *old_slots;
                 unsigned long *dirty_bitmap;
 
-                r = -ENOMEM;
-                dirty_bitmap = vmalloc(n);
-                if (!dirty_bitmap)
-                        goto out;
+                dirty_bitmap = memslot->dirty_bitmap_head;
+                if (memslot->dirty_bitmap == dirty_bitmap)
+                        dirty_bitmap += n / sizeof(long);
                 memset(dirty_bitmap, 0, n);
 
                 r = -ENOMEM;
                 slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
-                if (!slots) {
-                        vfree(dirty_bitmap);
+                if (!slots)
                         goto out;
-                }
                 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
                 slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
+                slots->generation++;
 
                 old_slots = kvm->memslots;
                 rcu_assign_pointer(kvm->memslots, slots);
@@ -3195,11 +3246,8 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
                 spin_unlock(&kvm->mmu_lock);
 
                 r = -EFAULT;
-                if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) {
-                        vfree(dirty_bitmap);
+                if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
                         goto out;
-                }
-                vfree(dirty_bitmap);
         } else {
                 r = -EFAULT;
                 if (clear_user(log->dirty_bitmap, n))
@@ -3266,8 +3314,10 @@ long kvm_arch_vm_ioctl(struct file *filp,
                 if (vpic) {
                         r = kvm_ioapic_init(kvm);
                         if (r) {
+                                mutex_lock(&kvm->slots_lock);
                                 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
                                                           &vpic->dev);
+                                mutex_unlock(&kvm->slots_lock);
                                 kfree(vpic);
                                 goto create_irqchip_unlock;
                         }
@@ -3278,10 +3328,12 @@ long kvm_arch_vm_ioctl(struct file *filp,
                 smp_wmb();
                 r = kvm_setup_default_irq_routing(kvm);
                 if (r) {
+                        mutex_lock(&kvm->slots_lock);
                         mutex_lock(&kvm->irq_lock);
                         kvm_ioapic_destroy(kvm);
                         kvm_destroy_pic(kvm);
                         mutex_unlock(&kvm->irq_lock);
+                        mutex_unlock(&kvm->slots_lock);
                 }
         create_irqchip_unlock:
                 mutex_unlock(&kvm->lock);
@@ -3557,63 +3609,63 @@ static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
 static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
 {
         gpa_t t_gpa;
-        u32 error;
+        struct x86_exception exception;
 
         BUG_ON(!mmu_is_nested(vcpu));
 
         /* NPT walks are always user-walks */
         access |= PFERR_USER_MASK;
-        t_gpa  = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &error);
-        if (t_gpa == UNMAPPED_GVA)
-                vcpu->arch.fault.nested = true;
+        t_gpa  = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception);
 
         return t_gpa;
 }
 
-gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
+                              struct x86_exception *exception)
 {
         u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
-        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error);
+        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
 }
 
- gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+ gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
+                                struct x86_exception *exception)
 {
         u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
         access |= PFERR_FETCH_MASK;
-        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error);
+        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
 }
 
-gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
+                               struct x86_exception *exception)
 {
         u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
         access |= PFERR_WRITE_MASK;
-        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error);
+        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
 }
 
 /* uses this to access any guest's mapped memory without checking CPL */
-gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
+                                struct x86_exception *exception)
 {
-        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, error);
+        return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception);
 }
 
 static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
                                       struct kvm_vcpu *vcpu, u32 access,
-                                      u32 *error)
+                                      struct x86_exception *exception)
 {
         void *data = val;
         int r = X86EMUL_CONTINUE;
 
         while (bytes) {
                 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access,
-                                                            error);
+                                                            exception);
                 unsigned offset = addr & (PAGE_SIZE-1);
                 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
                 int ret;
 
-                if (gpa == UNMAPPED_GVA) {
-                        r = X86EMUL_PROPAGATE_FAULT;
-                        goto out;
-                }
+                if (gpa == UNMAPPED_GVA)
+                        return X86EMUL_PROPAGATE_FAULT;
                 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
                 if (ret < 0) {
                         r = X86EMUL_IO_NEEDED;
@@ -3630,31 +3682,35 @@ out:
 
 /* used for instruction fetching */
 static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes,
-                                struct kvm_vcpu *vcpu, u32 *error)
+                                struct kvm_vcpu *vcpu,
+                                struct x86_exception *exception)
 {
         u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
         return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
-                                          access | PFERR_FETCH_MASK, error);
+                                          access | PFERR_FETCH_MASK,
+                                          exception);
 }
 
 static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
-                               struct kvm_vcpu *vcpu, u32 *error)
+                               struct kvm_vcpu *vcpu,
+                               struct x86_exception *exception)
 {
         u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
         return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
-                                          error);
+                                          exception);
 }
 
 static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes,
-                               struct kvm_vcpu *vcpu, u32 *error)
+                                      struct kvm_vcpu *vcpu,
+                                      struct x86_exception *exception)
 {
-        return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error);
+        return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception);
 }
 
 static int kvm_write_guest_virt_system(gva_t addr, void *val,
                                        unsigned int bytes,
                                        struct kvm_vcpu *vcpu,
-                                       u32 *error)
+                                       struct x86_exception *exception)
 {
         void *data = val;
         int r = X86EMUL_CONTINUE;
@@ -3662,15 +3718,13 @@ static int kvm_write_guest_virt_system(gva_t addr, void *val,
         while (bytes) {
                 gpa_t gpa =  vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr,
                                                              PFERR_WRITE_MASK,
-                                                             error);
+                                                             exception);
                 unsigned offset = addr & (PAGE_SIZE-1);
                 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
                 int ret;
 
-                if (gpa == UNMAPPED_GVA) {
-                        r = X86EMUL_PROPAGATE_FAULT;
-                        goto out;
-                }
+                if (gpa == UNMAPPED_GVA)
+                        return X86EMUL_PROPAGATE_FAULT;
                 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
                 if (ret < 0) {
                         r = X86EMUL_IO_NEEDED;
@@ -3688,7 +3742,7 @@ out:
 static int emulator_read_emulated(unsigned long addr,
                                   void *val,
                                   unsigned int bytes,
-                                  unsigned int *error_code,
+                                  struct x86_exception *exception,
                                   struct kvm_vcpu *vcpu)
 {
         gpa_t                 gpa;
@@ -3701,7 +3755,7 @@ static int emulator_read_emulated(unsigned long addr,
                 return X86EMUL_CONTINUE;
         }
 
-        gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, error_code);
+        gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, exception);
 
         if (gpa == UNMAPPED_GVA)
                 return X86EMUL_PROPAGATE_FAULT;
@@ -3710,8 +3764,8 @@ static int emulator_read_emulated(unsigned long addr,
         if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
                 goto mmio;
 
-        if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL)
-                                == X86EMUL_CONTINUE)
+        if (kvm_read_guest_virt(addr, val, bytes, vcpu, exception)
+            == X86EMUL_CONTINUE)
                 return X86EMUL_CONTINUE;
 
 mmio:
@@ -3735,7 +3789,7 @@ mmio:
 }
 
 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
-                          const void *val, int bytes)
+                        const void *val, int bytes)
 {
         int ret;
 
@@ -3749,12 +3803,12 @@ int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 static int emulator_write_emulated_onepage(unsigned long addr,
                                            const void *val,
                                            unsigned int bytes,
-                                           unsigned int *error_code,
+                                           struct x86_exception *exception,
                                            struct kvm_vcpu *vcpu)
 {
         gpa_t                 gpa;
 
-        gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error_code);
+        gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, exception);
 
         if (gpa == UNMAPPED_GVA)
                 return X86EMUL_PROPAGATE_FAULT;
@@ -3787,7 +3841,7 @@ mmio:
 int emulator_write_emulated(unsigned long addr,
                             const void *val,
                             unsigned int bytes,
-                            unsigned int *error_code,
+                            struct x86_exception *exception,
                             struct kvm_vcpu *vcpu)
 {
         /* Crossing a page boundary? */
@@ -3795,7 +3849,7 @@ int emulator_write_emulated(unsigned long addr,
                 int rc, now;
 
                 now = -addr & ~PAGE_MASK;
-                rc = emulator_write_emulated_onepage(addr, val, now, error_code,
+                rc = emulator_write_emulated_onepage(addr, val, now, exception,
                                                      vcpu);
                 if (rc != X86EMUL_CONTINUE)
                         return rc;
@@ -3803,7 +3857,7 @@ int emulator_write_emulated(unsigned long addr,
                 val += now;
                 bytes -= now;
         }
-        return emulator_write_emulated_onepage(addr, val, bytes, error_code,
+        return emulator_write_emulated_onepage(addr, val, bytes, exception,
                                                vcpu);
 }
 
@@ -3821,7 +3875,7 @@ static int emulator_cmpxchg_emulated(unsigned long addr,
                                      const void *old,
                                      const void *new,
                                      unsigned int bytes,
-                                     unsigned int *error_code,
+                                     struct x86_exception *exception,
                                      struct kvm_vcpu *vcpu)
 {
         gpa_t gpa;
@@ -3879,7 +3933,7 @@ static int emulator_cmpxchg_emulated(unsigned long addr,
 emul_write:
         printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
 
-        return emulator_write_emulated(addr, new, bytes, error_code, vcpu);
+        return emulator_write_emulated(addr, new, bytes, exception, vcpu);
 }
 
 static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
@@ -3904,7 +3958,7 @@ static int emulator_pio_in_emulated(int size, unsigned short port, void *val,
         if (vcpu->arch.pio.count)
                 goto data_avail;
 
-        trace_kvm_pio(0, port, size, 1);
+        trace_kvm_pio(0, port, size, count);
 
         vcpu->arch.pio.port = port;
         vcpu->arch.pio.in = 1;
@@ -3932,7 +3986,7 @@ static int emulator_pio_out_emulated(int size, unsigned short port,
                               const void *val, unsigned int count,
                               struct kvm_vcpu *vcpu)
 {
-        trace_kvm_pio(1, port, size, 1);
+        trace_kvm_pio(1, port, size, count);
 
         vcpu->arch.pio.port = port;
         vcpu->arch.pio.in = 0;
@@ -3973,13 +4027,15 @@ int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu)
                 return X86EMUL_CONTINUE;
 
         if (kvm_x86_ops->has_wbinvd_exit()) {
-                preempt_disable();
+                int cpu = get_cpu();
+
+                cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
                 smp_call_function_many(vcpu->arch.wbinvd_dirty_mask,
                                 wbinvd_ipi, NULL, 1);
-                preempt_enable();
+                put_cpu();
                 cpumask_clear(vcpu->arch.wbinvd_dirty_mask);
-        }
-        wbinvd();
+        } else
+                wbinvd();
         return X86EMUL_CONTINUE;
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd);
@@ -4019,7 +4075,7 @@ static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu)
                 value = vcpu->arch.cr2;
                 break;
         case 3:
-                value = vcpu->arch.cr3;
+                value = kvm_read_cr3(vcpu);
                 break;
         case 4:
                 value = kvm_read_cr4(vcpu);
@@ -4053,7 +4109,7 @@ static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu)
                 res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
                 break;
         case 8:
-                res = __kvm_set_cr8(vcpu, val & 0xfUL);
+                res = kvm_set_cr8(vcpu, val);
                 break;
         default:
                 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
@@ -4206,12 +4262,13 @@ static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask)
 static void inject_emulated_exception(struct kvm_vcpu *vcpu)
 {
         struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
-        if (ctxt->exception == PF_VECTOR)
-                kvm_propagate_fault(vcpu);
-        else if (ctxt->error_code_valid)
-                kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code);
+        if (ctxt->exception.vector == PF_VECTOR)
+                kvm_propagate_fault(vcpu, &ctxt->exception);
+        else if (ctxt->exception.error_code_valid)
+                kvm_queue_exception_e(vcpu, ctxt->exception.vector,
+                                      ctxt->exception.error_code);
         else
-                kvm_queue_exception(vcpu, ctxt->exception);
+                kvm_queue_exception(vcpu, ctxt->exception.vector);
 }
 
 static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
@@ -4267,13 +4324,19 @@ EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);
 
 static int handle_emulation_failure(struct kvm_vcpu *vcpu)
 {
+        int r = EMULATE_DONE;
+
         ++vcpu->stat.insn_emulation_fail;
         trace_kvm_emulate_insn_failed(vcpu);
-        vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
-        vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
-        vcpu->run->internal.ndata = 0;
+        if (!is_guest_mode(vcpu)) {
+                vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+                vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
+                vcpu->run->internal.ndata = 0;
+                r = EMULATE_FAIL;
+        }
         kvm_queue_exception(vcpu, UD_VECTOR);
-        return EMULATE_FAIL;
+
+        return r;
 }
 
 static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
@@ -4302,10 +4365,11 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
         return false;
 }
 
-int emulate_instruction(struct kvm_vcpu *vcpu,
-                        unsigned long cr2,
-                        u16 error_code,
-                        int emulation_type)
+int x86_emulate_instruction(struct kvm_vcpu *vcpu,
+                            unsigned long cr2,
+                            int emulation_type,
+                            void *insn,
+                            int insn_len)
 {
         int r;
         struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode;
@@ -4323,10 +4387,10 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
         if (!(emulation_type & EMULTYPE_NO_DECODE)) {
                 init_emulate_ctxt(vcpu);
                 vcpu->arch.emulate_ctxt.interruptibility = 0;
-                vcpu->arch.emulate_ctxt.exception = -1;
+                vcpu->arch.emulate_ctxt.have_exception = false;
                 vcpu->arch.emulate_ctxt.perm_ok = false;
 
-                r = x86_decode_insn(&vcpu->arch.emulate_ctxt);
+                r = x86_decode_insn(&vcpu->arch.emulate_ctxt, insn, insn_len);
                 if (r == X86EMUL_PROPAGATE_FAULT)
                         goto done;
 
@@ -4389,7 +4453,7 @@ restart:
         }
 
 done:
-        if (vcpu->arch.emulate_ctxt.exception >= 0) {
+        if (vcpu->arch.emulate_ctxt.have_exception) {
                 inject_emulated_exception(vcpu);
                 r = EMULATE_DONE;
         } else if (vcpu->arch.pio.count) {
@@ -4413,7 +4477,7 @@ done:
 
         return r;
 }
-EXPORT_SYMBOL_GPL(emulate_instruction);
+EXPORT_SYMBOL_GPL(x86_emulate_instruction);
 
 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
 {
@@ -4653,7 +4717,6 @@ int kvm_arch_init(void *opaque)
 
         kvm_x86_ops = ops;
         kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
-        kvm_mmu_set_base_ptes(PT_PRESENT_MASK);
         kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
                         PT_DIRTY_MASK, PT64_NX_MASK, 0);
 
@@ -5116,6 +5179,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
                         vcpu->fpu_active = 0;
                         kvm_x86_ops->fpu_deactivate(vcpu);
                 }
+                if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) {
+                        /* Page is swapped out. Do synthetic halt */
+                        vcpu->arch.apf.halted = true;
+                        r = 1;
+                        goto out;
+                }
         }
 
         r = kvm_mmu_reload(vcpu);
@@ -5244,7 +5313,8 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
 
         r = 1;
         while (r > 0) {
-                if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
+                if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
+                    !vcpu->arch.apf.halted)
                         r = vcpu_enter_guest(vcpu);
                 else {
                         srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
@@ -5257,6 +5327,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
                                         vcpu->arch.mp_state =
                                                 KVM_MP_STATE_RUNNABLE;
                                 case KVM_MP_STATE_RUNNABLE:
+                                        vcpu->arch.apf.halted = false;
                                         break;
                                 case KVM_MP_STATE_SIPI_RECEIVED:
                                 default:
@@ -5278,6 +5349,9 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
                         vcpu->run->exit_reason = KVM_EXIT_INTR;
                         ++vcpu->stat.request_irq_exits;
                 }
+
+                kvm_check_async_pf_completion(vcpu);
+
                 if (signal_pending(current)) {
                         r = -EINTR;
                         vcpu->run->exit_reason = KVM_EXIT_INTR;
@@ -5302,6 +5376,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         int r;
         sigset_t sigsaved;
 
+        if (!tsk_used_math(current) && init_fpu(current))
+                return -ENOMEM;
+
         if (vcpu->sigset_active)
                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 
@@ -5313,8 +5390,12 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         }
 
         /* re-sync apic's tpr */
-        if (!irqchip_in_kernel(vcpu->kvm))
-                kvm_set_cr8(vcpu, kvm_run->cr8);
+        if (!irqchip_in_kernel(vcpu->kvm)) {
+                if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) {
+                        r = -EINVAL;
+                        goto out;
+                }
+        }
 
         if (vcpu->arch.pio.count || vcpu->mmio_needed) {
                 if (vcpu->mmio_needed) {
@@ -5323,7 +5404,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                         vcpu->mmio_needed = 0;
                 }
                 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
-                r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE);
+                r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE);
                 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
                 if (r != EMULATE_DONE) {
                         r = 0;
@@ -5436,7 +5517,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 
         sregs->cr0 = kvm_read_cr0(vcpu);
         sregs->cr2 = vcpu->arch.cr2;
-        sregs->cr3 = vcpu->arch.cr3;
+        sregs->cr3 = kvm_read_cr3(vcpu);
         sregs->cr4 = kvm_read_cr4(vcpu);
         sregs->cr8 = kvm_get_cr8(vcpu);
         sregs->efer = vcpu->arch.efer;
@@ -5504,8 +5585,9 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
         kvm_x86_ops->set_gdt(vcpu, &dt);
 
         vcpu->arch.cr2 = sregs->cr2;
-        mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
+        mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3;
         vcpu->arch.cr3 = sregs->cr3;
+        __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
 
         kvm_set_cr8(vcpu, sregs->cr8);
 
@@ -5522,7 +5604,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
         if (sregs->cr4 & X86_CR4_OSXSAVE)
                 update_cpuid(vcpu);
         if (!is_long_mode(vcpu) && is_pae(vcpu)) {
-                load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3);
+                load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
                 mmu_reset_needed = 1;
         }
 
@@ -5773,6 +5855,8 @@ free_vcpu:
 
 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 {
+        vcpu->arch.apf.msr_val = 0;
+
         vcpu_load(vcpu);
         kvm_mmu_unload(vcpu);
         vcpu_put(vcpu);
@@ -5792,6 +5876,11 @@ int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
         vcpu->arch.dr7 = DR7_FIXED_1;
 
         kvm_make_request(KVM_REQ_EVENT, vcpu);
+        vcpu->arch.apf.msr_val = 0;
+
+        kvm_clear_async_pf_completion_queue(vcpu);
+        kvm_async_pf_hash_reset(vcpu);
+        vcpu->arch.apf.halted = false;
 
         return kvm_x86_ops->vcpu_reset(vcpu);
 }
@@ -5881,6 +5970,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
         if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL))
                 goto fail_free_mce_banks;
 
+        kvm_async_pf_hash_reset(vcpu);
+
         return 0;
 fail_free_mce_banks:
         kfree(vcpu->arch.mce_banks);
@@ -5906,13 +5997,8 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
         free_page((unsigned long)vcpu->arch.pio_data);
 }
 
-struct  kvm *kvm_arch_create_vm(void)
+int kvm_arch_init_vm(struct kvm *kvm)
 {
-        struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
-
-        if (!kvm)
-                return ERR_PTR(-ENOMEM);
-
         INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 
@@ -5921,7 +6007,7 @@ struct  kvm *kvm_arch_create_vm(void)
 
         spin_lock_init(&kvm->arch.tsc_write_lock);
 
-        return kvm;
+        return 0;
 }
 
 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
@@ -5939,8 +6025,10 @@ static void kvm_free_vcpus(struct kvm *kvm)
         /*
          * Unpin any mmu pages first.
          */
-        kvm_for_each_vcpu(i, vcpu, kvm)
+        kvm_for_each_vcpu(i, vcpu, kvm) {
+                kvm_clear_async_pf_completion_queue(vcpu);
                 kvm_unload_vcpu_mmu(vcpu);
+        }
         kvm_for_each_vcpu(i, vcpu, kvm)
                 kvm_arch_vcpu_free(vcpu);
 
@@ -5964,13 +6052,10 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
         kfree(kvm->arch.vpic);
         kfree(kvm->arch.vioapic);
         kvm_free_vcpus(kvm);
-        kvm_free_physmem(kvm);
         if (kvm->arch.apic_access_page)
                 put_page(kvm->arch.apic_access_page);
         if (kvm->arch.ept_identity_pagetable)
                 put_page(kvm->arch.ept_identity_pagetable);
-        cleanup_srcu_struct(&kvm->srcu);
-        kfree(kvm);
 }
 
 int kvm_arch_prepare_memory_region(struct kvm *kvm,
@@ -6051,7 +6136,9 @@ void kvm_arch_flush_shadow(struct kvm *kvm)
 
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
 {
-        return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE
+        return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
+                !vcpu->arch.apf.halted)
+                || !list_empty_careful(&vcpu->async_pf.done)
                 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
                 || vcpu->arch.nmi_pending ||
                 (kvm_arch_interrupt_allowed(vcpu) &&
@@ -6110,6 +6197,147 @@ void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
 }
 EXPORT_SYMBOL_GPL(kvm_set_rflags);
 
+void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
+{
+        int r;
+
+        if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) ||
+              is_error_page(work->page))
+                return;
+
+        r = kvm_mmu_reload(vcpu);
+        if (unlikely(r))
+                return;
+
+        if (!vcpu->arch.mmu.direct_map &&
+              work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu))
+                return;
+
+        vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true);
+}
+
+static inline u32 kvm_async_pf_hash_fn(gfn_t gfn)
+{
+        return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU));
+}
+
+static inline u32 kvm_async_pf_next_probe(u32 key)
+{
+        return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1);
+}
+
+static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
+{
+        u32 key = kvm_async_pf_hash_fn(gfn);
+
+        while (vcpu->arch.apf.gfns[key] != ~0)
+                key = kvm_async_pf_next_probe(key);
+
+        vcpu->arch.apf.gfns[key] = gfn;
+}
+
+static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn)
+{
+        int i;
+        u32 key = kvm_async_pf_hash_fn(gfn);
+
+        for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) &&
+                     (vcpu->arch.apf.gfns[key] != gfn &&
+                      vcpu->arch.apf.gfns[key] != ~0); i++)
+                key = kvm_async_pf_next_probe(key);
+
+        return key;
+}
+
+bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
+{
+        return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn;
+}
+
+static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
+{
+        u32 i, j, k;
+
+        i = j = kvm_async_pf_gfn_slot(vcpu, gfn);
+        while (true) {
+                vcpu->arch.apf.gfns[i] = ~0;
+                do {
+                        j = kvm_async_pf_next_probe(j);
+                        if (vcpu->arch.apf.gfns[j] == ~0)
+                                return;
+                        k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]);
+                        /*
+                         * k lies cyclically in ]i,j]
+                         * |    i.k.j |
+                         * |....j i.k.| or  |.k..j i...|
+                         */
+                } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j));
+                vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j];
+                i = j;
+        }
+}
+
+static int apf_put_user(struct kvm_vcpu *vcpu, u32 val)
+{
+
+        return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val,
+                                      sizeof(val));
+}
+
+void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
+                                     struct kvm_async_pf *work)
+{
+        struct x86_exception fault;
+
+        trace_kvm_async_pf_not_present(work->arch.token, work->gva);
+        kvm_add_async_pf_gfn(vcpu, work->arch.gfn);
+
+        if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) ||
+            (vcpu->arch.apf.send_user_only &&
+             kvm_x86_ops->get_cpl(vcpu) == 0))
+                kvm_make_request(KVM_REQ_APF_HALT, vcpu);
+        else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) {
+                fault.vector = PF_VECTOR;
+                fault.error_code_valid = true;
+                fault.error_code = 0;
+                fault.nested_page_fault = false;
+                fault.address = work->arch.token;
+                kvm_inject_page_fault(vcpu, &fault);
+        }
+}
+
+void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
+                                 struct kvm_async_pf *work)
+{
+        struct x86_exception fault;
+
+        trace_kvm_async_pf_ready(work->arch.token, work->gva);
+        if (is_error_page(work->page))
+                work->arch.token = ~0; /* broadcast wakeup */
+        else
+                kvm_del_async_pf_gfn(vcpu, work->arch.gfn);
+
+        if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) &&
+            !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) {
+                fault.vector = PF_VECTOR;
+                fault.error_code_valid = true;
+                fault.error_code = 0;
+                fault.nested_page_fault = false;
+                fault.address = work->arch.token;
+                kvm_inject_page_fault(vcpu, &fault);
+        }
+        vcpu->arch.apf.halted = false;
+}
+
+bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
+{
+        if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED))
+                return true;
+        else
+                return !kvm_event_needs_reinjection(vcpu) &&
+                        kvm_x86_ops->interrupt_allowed(vcpu);
+}
+
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 919ae53adc5c..ea2dc1a2e13d 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -540,6 +540,7 @@ struct kvm_ppc_pvinfo {
 #endif
 #define KVM_CAP_PPC_GET_PVINFO 57
 #define KVM_CAP_PPC_IRQ_LEVEL 58
+#define KVM_CAP_ASYNC_PF 59
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index a0557422715e..b5021db21858 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -16,6 +16,8 @@
 #include <linux/mm.h>
 #include <linux/preempt.h>
 #include <linux/msi.h>
+#include <linux/slab.h>
+#include <linux/rcupdate.h>
 #include <asm/signal.h>
 
 #include <linux/kvm.h>
@@ -40,6 +42,7 @@
 #define KVM_REQ_KICK               9
 #define KVM_REQ_DEACTIVATE_FPU    10
 #define KVM_REQ_EVENT             11
+#define KVM_REQ_APF_HALT          12
 
 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
 
@@ -74,6 +77,27 @@ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
                               struct kvm_io_device *dev);
 
+#ifdef CONFIG_KVM_ASYNC_PF
+struct kvm_async_pf {
+        struct work_struct work;
+        struct list_head link;
+        struct list_head queue;
+        struct kvm_vcpu *vcpu;
+        struct mm_struct *mm;
+        gva_t gva;
+        unsigned long addr;
+        struct kvm_arch_async_pf arch;
+        struct page *page;
+        bool done;
+};
+
+void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
+void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
+int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
+                       struct kvm_arch_async_pf *arch);
+int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
+#endif
+
 struct kvm_vcpu {
         struct kvm *kvm;
 #ifdef CONFIG_PREEMPT_NOTIFIERS
@@ -104,6 +128,15 @@ struct kvm_vcpu {
         gpa_t mmio_phys_addr;
 #endif
 
+#ifdef CONFIG_KVM_ASYNC_PF
+        struct {
+                u32 queued;
+                struct list_head queue;
+                struct list_head done;
+                spinlock_t lock;
+        } async_pf;
+#endif
+
         struct kvm_vcpu_arch arch;
 };
 
@@ -113,16 +146,19 @@ struct kvm_vcpu {
  */
 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 
+struct kvm_lpage_info {
+        unsigned long rmap_pde;
+        int write_count;
+};
+
 struct kvm_memory_slot {
         gfn_t base_gfn;
         unsigned long npages;
         unsigned long flags;
         unsigned long *rmap;
         unsigned long *dirty_bitmap;
-        struct {
-                unsigned long rmap_pde;
-                int write_count;
-        } *lpage_info[KVM_NR_PAGE_SIZES - 1];
+        unsigned long *dirty_bitmap_head;
+        struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
         unsigned long userspace_addr;
         int user_alloc;
         int id;
@@ -169,6 +205,7 @@ struct kvm_irq_routing_table {};
 
 struct kvm_memslots {
         int nmemslots;
+        u64 generation;
         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
                                         KVM_PRIVATE_MEM_SLOTS];
 };
@@ -206,6 +243,10 @@ struct kvm {
 
         struct mutex irq_lock;
 #ifdef CONFIG_HAVE_KVM_IRQCHIP
+        /*
+         * Update side is protected by irq_lock and,
+         * if configured, irqfds.lock.
+         */
         struct kvm_irq_routing_table __rcu *irq_routing;
         struct hlist_head mask_notifier_list;
         struct hlist_head irq_ack_notifier_list;
@@ -216,6 +257,7 @@ struct kvm {
         unsigned long mmu_notifier_seq;
         long mmu_notifier_count;
 #endif
+        long tlbs_dirty;
 };
 
 /* The guest did something we don't support. */
@@ -302,7 +344,11 @@ void kvm_set_page_accessed(struct page *page);
 
 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
+pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
+                       bool write_fault, bool *writable);
 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
+pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
+                      bool *writable);
 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
                          struct kvm_memory_slot *slot, gfn_t gfn);
 int memslot_id(struct kvm *kvm, gfn_t gfn);
@@ -321,18 +367,25 @@ int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
                          int offset, int len);
 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
                     unsigned long len);
+int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+                           void *data, unsigned long len);
+int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+                              gpa_t gpa);
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
+void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
+                             gfn_t gfn);
 
 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 void kvm_resched(struct kvm_vcpu *vcpu);
 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
+
 void kvm_flush_remote_tlbs(struct kvm *kvm);
 void kvm_reload_remote_mmus(struct kvm *kvm);
 
@@ -398,7 +451,19 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 
 void kvm_free_physmem(struct kvm *kvm);
 
-struct  kvm *kvm_arch_create_vm(void);
+#ifndef __KVM_HAVE_ARCH_VM_ALLOC
+static inline struct kvm *kvm_arch_alloc_vm(void)
+{
+        return kzalloc(sizeof(struct kvm), GFP_KERNEL);
+}
+
+static inline void kvm_arch_free_vm(struct kvm *kvm)
+{
+        kfree(kvm);
+}
+#endif
+
+int kvm_arch_init_vm(struct kvm *kvm);
 void kvm_arch_destroy_vm(struct kvm *kvm);
 void kvm_free_all_assigned_devices(struct kvm *kvm);
 void kvm_arch_sync_events(struct kvm *kvm);
@@ -414,16 +479,8 @@ struct kvm_irq_ack_notifier {
         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 };
 
-#define KVM_ASSIGNED_MSIX_PENDING               0x1
-struct kvm_guest_msix_entry {
-        u32 vector;
-        u16 entry;
-        u16 flags;
-};
-
 struct kvm_assigned_dev_kernel {
         struct kvm_irq_ack_notifier ack_notifier;
-        struct work_struct interrupt_work;
         struct list_head list;
         int assigned_dev_id;
         int host_segnr;
@@ -434,13 +491,14 @@ struct kvm_assigned_dev_kernel {
         bool host_irq_disabled;
         struct msix_entry *host_msix_entries;
         int guest_irq;
-        struct kvm_guest_msix_entry *guest_msix_entries;
+        struct msix_entry *guest_msix_entries;
         unsigned long irq_requested_type;
         int irq_source_id;
         int flags;
         struct pci_dev *dev;
         struct kvm *kvm;
-        spinlock_t assigned_dev_lock;
+        spinlock_t intx_lock;
+        char irq_name[32];
 };
 
 struct kvm_irq_mask_notifier {
@@ -462,6 +520,8 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
                                    unsigned long *deliver_bitmask);
 #endif
 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
+int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
+                int irq_source_id, int level);
 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 void kvm_register_irq_ack_notifier(struct kvm *kvm,
                                    struct kvm_irq_ack_notifier *kian);
@@ -603,17 +663,28 @@ static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 void kvm_eventfd_init(struct kvm *kvm);
 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 void kvm_irqfd_release(struct kvm *kvm);
+void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 
 #else
 
 static inline void kvm_eventfd_init(struct kvm *kvm) {}
+
 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 {
         return -EINVAL;
 }
 
 static inline void kvm_irqfd_release(struct kvm *kvm) {}
+
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
+static inline void kvm_irq_routing_update(struct kvm *kvm,
+                                          struct kvm_irq_routing_table *irq_rt)
+{
+        rcu_assign_pointer(kvm->irq_routing, irq_rt);
+}
+#endif
+
 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 {
         return -ENOSYS;
diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h
index 7ac0d4eee430..fa7cc7244cbd 100644
--- a/include/linux/kvm_types.h
+++ b/include/linux/kvm_types.h
@@ -67,4 +67,11 @@ struct kvm_lapic_irq {
         u32 dest_id;
 };
 
+struct gfn_to_hva_cache {
+        u64 generation;
+        gpa_t gpa;
+        unsigned long hva;
+        struct kvm_memory_slot *memslot;
+};
+
 #endif /* __KVM_TYPES_H__ */
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index 6dd3a51ab1cb..46e3cd8e197a 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -6,6 +6,36 @@
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM kvm
 
+#define ERSN(x) { KVM_EXIT_##x, "KVM_EXIT_" #x }
+
+#define kvm_trace_exit_reason                                           \
+        ERSN(UNKNOWN), ERSN(EXCEPTION), ERSN(IO), ERSN(HYPERCALL),      \
+        ERSN(DEBUG), ERSN(HLT), ERSN(MMIO), ERSN(IRQ_WINDOW_OPEN),      \
+        ERSN(SHUTDOWN), ERSN(FAIL_ENTRY), ERSN(INTR), ERSN(SET_TPR),    \
+        ERSN(TPR_ACCESS), ERSN(S390_SIEIC), ERSN(S390_RESET), ERSN(DCR),\
+        ERSN(NMI), ERSN(INTERNAL_ERROR), ERSN(OSI)
+
+TRACE_EVENT(kvm_userspace_exit,
+            TP_PROTO(__u32 reason, int errno),
+            TP_ARGS(reason, errno),
+
+        TP_STRUCT__entry(
+                __field(        __u32,          reason          )
+                __field(        int,            errno           )
+        ),
+
+        TP_fast_assign(
+                __entry->reason         = reason;
+                __entry->errno          = errno;
+        ),
+
+        TP_printk("reason %s (%d)",
+                  __entry->errno < 0 ?
+                  (__entry->errno == -EINTR ? "restart" : "error") :
+                  __print_symbolic(__entry->reason, kvm_trace_exit_reason),
+                  __entry->errno < 0 ? -__entry->errno : __entry->reason)
+);
+
 #if defined(__KVM_HAVE_IOAPIC)
 TRACE_EVENT(kvm_set_irq,
         TP_PROTO(unsigned int gsi, int level, int irq_source_id),
@@ -185,6 +215,97 @@ TRACE_EVENT(kvm_age_page,
                   __entry->referenced ? "YOUNG" : "OLD")
 );
 
+#ifdef CONFIG_KVM_ASYNC_PF
+DECLARE_EVENT_CLASS(kvm_async_get_page_class,
+
+        TP_PROTO(u64 gva, u64 gfn),
+
+        TP_ARGS(gva, gfn),
+
+        TP_STRUCT__entry(
+                __field(__u64, gva)
+                __field(u64, gfn)
+        ),
+
+        TP_fast_assign(
+                __entry->gva = gva;
+                __entry->gfn = gfn;
+        ),
+
+        TP_printk("gva = %#llx, gfn = %#llx", __entry->gva, __entry->gfn)
+);
+
+DEFINE_EVENT(kvm_async_get_page_class, kvm_try_async_get_page,
+
+        TP_PROTO(u64 gva, u64 gfn),
+
+        TP_ARGS(gva, gfn)
+);
+
+DEFINE_EVENT(kvm_async_get_page_class, kvm_async_pf_doublefault,
+
+        TP_PROTO(u64 gva, u64 gfn),
+
+        TP_ARGS(gva, gfn)
+);
+
+DECLARE_EVENT_CLASS(kvm_async_pf_nopresent_ready,
+
+        TP_PROTO(u64 token, u64 gva),
+
+        TP_ARGS(token, gva),
+
+        TP_STRUCT__entry(
+                __field(__u64, token)
+                __field(__u64, gva)
+        ),
+
+        TP_fast_assign(
+                __entry->token = token;
+                __entry->gva = gva;
+        ),
+
+        TP_printk("token %#llx gva %#llx", __entry->token, __entry->gva)
+
+);
+
+DEFINE_EVENT(kvm_async_pf_nopresent_ready, kvm_async_pf_not_present,
+
+        TP_PROTO(u64 token, u64 gva),
+
+        TP_ARGS(token, gva)
+);
+
+DEFINE_EVENT(kvm_async_pf_nopresent_ready, kvm_async_pf_ready,
+
+        TP_PROTO(u64 token, u64 gva),
+
+        TP_ARGS(token, gva)
+);
+
+TRACE_EVENT(
+        kvm_async_pf_completed,
+        TP_PROTO(unsigned long address, struct page *page, u64 gva),
+        TP_ARGS(address, page, gva),
+
+        TP_STRUCT__entry(
+                __field(unsigned long, address)
+                __field(pfn_t, pfn)
+                __field(u64, gva)
+                ),
+
+        TP_fast_assign(
+                __entry->address = address;
+                __entry->pfn = page ? page_to_pfn(page) : 0;
+                __entry->gva = gva;
+                ),
+
+        TP_printk("gva %#llx address %#lx pfn %#llx",  __entry->gva,
+                  __entry->address, __entry->pfn)
+);
+
+#endif
+
 #endif /* _TRACE_KVM_MAIN_H */
 
 /* This part must be outside protection */
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 7f1178f6b839..f63ccb0a5982 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -15,3 +15,6 @@ config KVM_APIC_ARCHITECTURE
 
 config KVM_MMIO
        bool
+
+config KVM_ASYNC_PF
+       bool
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index 7c98928b09d9..ae72ae604c89 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -55,58 +55,31 @@ static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
         return index;
 }
 
-static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
+static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id)
 {
-        struct kvm_assigned_dev_kernel *assigned_dev;
-        int i;
+        struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
+        u32 vector;
+        int index;
 
-        assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
-                                    interrupt_work);
+        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_INTX) {
+                spin_lock(&assigned_dev->intx_lock);
+                disable_irq_nosync(irq);
+                assigned_dev->host_irq_disabled = true;
+                spin_unlock(&assigned_dev->intx_lock);
+        }
 
-        spin_lock_irq(&assigned_dev->assigned_dev_lock);
         if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
-                struct kvm_guest_msix_entry *guest_entries =
-                        assigned_dev->guest_msix_entries;
-                for (i = 0; i < assigned_dev->entries_nr; i++) {
-                        if (!(guest_entries[i].flags &
-                                        KVM_ASSIGNED_MSIX_PENDING))
-                                continue;
-                        guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING;
+                index = find_index_from_host_irq(assigned_dev, irq);
+                if (index >= 0) {
+                        vector = assigned_dev->
+                                        guest_msix_entries[index].vector;
                         kvm_set_irq(assigned_dev->kvm,
-                                    assigned_dev->irq_source_id,
-                                    guest_entries[i].vector, 1);
+                                    assigned_dev->irq_source_id, vector, 1);
                 }
         } else
                 kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
                             assigned_dev->guest_irq, 1);
 
-        spin_unlock_irq(&assigned_dev->assigned_dev_lock);
-}
-
-static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
-{
-        unsigned long flags;
-        struct kvm_assigned_dev_kernel *assigned_dev =
-                (struct kvm_assigned_dev_kernel *) dev_id;
-
-        spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags);
-        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
-                int index = find_index_from_host_irq(assigned_dev, irq);
-                if (index < 0)
-                        goto out;
-                assigned_dev->guest_msix_entries[index].flags |=
-                        KVM_ASSIGNED_MSIX_PENDING;
-        }
-
-        schedule_work(&assigned_dev->interrupt_work);
-
-        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
-                disable_irq_nosync(irq);
-                assigned_dev->host_irq_disabled = true;
-        }
-
-out:
-        spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags);
         return IRQ_HANDLED;
 }
 
@@ -114,7 +87,6 @@ out:
 static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
 {
         struct kvm_assigned_dev_kernel *dev;
-        unsigned long flags;
 
         if (kian->gsi == -1)
                 return;
@@ -127,12 +99,12 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
         /* The guest irq may be shared so this ack may be
          * from another device.
          */
-        spin_lock_irqsave(&dev->assigned_dev_lock, flags);
+        spin_lock(&dev->intx_lock);
         if (dev->host_irq_disabled) {
                 enable_irq(dev->host_irq);
                 dev->host_irq_disabled = false;
         }
-        spin_unlock_irqrestore(&dev->assigned_dev_lock, flags);
+        spin_unlock(&dev->intx_lock);
 }
 
 static void deassign_guest_irq(struct kvm *kvm,
@@ -141,6 +113,9 @@ static void deassign_guest_irq(struct kvm *kvm,
         kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
         assigned_dev->ack_notifier.gsi = -1;
 
+        kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
+                    assigned_dev->guest_irq, 0);
+
         if (assigned_dev->irq_source_id != -1)
                 kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
         assigned_dev->irq_source_id = -1;
@@ -152,28 +127,19 @@ static void deassign_host_irq(struct kvm *kvm,
                               struct kvm_assigned_dev_kernel *assigned_dev)
 {
         /*
-         * In kvm_free_device_irq, cancel_work_sync return true if:
-         * 1. work is scheduled, and then cancelled.
-         * 2. work callback is executed.
-         *
-         * The first one ensured that the irq is disabled and no more events
-         * would happen. But for the second one, the irq may be enabled (e.g.
-         * for MSI). So we disable irq here to prevent further events.
+         * We disable irq here to prevent further events.
          *
          * Notice this maybe result in nested disable if the interrupt type is
          * INTx, but it's OK for we are going to free it.
          *
          * If this function is a part of VM destroy, please ensure that till
          * now, the kvm state is still legal for probably we also have to wait
-         * interrupt_work done.
+         * on a currently running IRQ handler.
          */
         if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
                 int i;
                 for (i = 0; i < assigned_dev->entries_nr; i++)
-                        disable_irq_nosync(assigned_dev->
-                                           host_msix_entries[i].vector);
-
-                cancel_work_sync(&assigned_dev->interrupt_work);
+                        disable_irq(assigned_dev->host_msix_entries[i].vector);
 
                 for (i = 0; i < assigned_dev->entries_nr; i++)
                         free_irq(assigned_dev->host_msix_entries[i].vector,
@@ -185,8 +151,7 @@ static void deassign_host_irq(struct kvm *kvm,
                 pci_disable_msix(assigned_dev->dev);
         } else {
                 /* Deal with MSI and INTx */
-                disable_irq_nosync(assigned_dev->host_irq);
-                cancel_work_sync(&assigned_dev->interrupt_work);
+                disable_irq(assigned_dev->host_irq);
 
                 free_irq(assigned_dev->host_irq, (void *)assigned_dev);
 
@@ -232,7 +197,8 @@ static void kvm_free_assigned_device(struct kvm *kvm,
 {
         kvm_free_assigned_irq(kvm, assigned_dev);
 
-        pci_reset_function(assigned_dev->dev);
+        __pci_reset_function(assigned_dev->dev);
+        pci_restore_state(assigned_dev->dev);
 
         pci_release_regions(assigned_dev->dev);
         pci_disable_device(assigned_dev->dev);
@@ -265,8 +231,8 @@ static int assigned_device_enable_host_intx(struct kvm *kvm,
          * on the same interrupt line is not a happy situation: there
          * are going to be long delays in accepting, acking, etc.
          */
-        if (request_irq(dev->host_irq, kvm_assigned_dev_intr,
-                        0, "kvm_assigned_intx_device", (void *)dev))
+        if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
+                                 IRQF_ONESHOT, dev->irq_name, (void *)dev))
                 return -EIO;
         return 0;
 }
@@ -284,8 +250,8 @@ static int assigned_device_enable_host_msi(struct kvm *kvm,
         }
 
         dev->host_irq = dev->dev->irq;
-        if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0,
-                        "kvm_assigned_msi_device", (void *)dev)) {
+        if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
+                                 0, dev->irq_name, (void *)dev)) {
                 pci_disable_msi(dev->dev);
                 return -EIO;
         }
@@ -310,10 +276,9 @@ static int assigned_device_enable_host_msix(struct kvm *kvm,
                 return r;
 
         for (i = 0; i < dev->entries_nr; i++) {
-                r = request_irq(dev->host_msix_entries[i].vector,
-                                kvm_assigned_dev_intr, 0,
-                                "kvm_assigned_msix_device",
-                                (void *)dev);
+                r = request_threaded_irq(dev->host_msix_entries[i].vector,
+                                         NULL, kvm_assigned_dev_thread,
+                                         0, dev->irq_name, (void *)dev);
                 if (r)
                         goto err;
         }
@@ -370,6 +335,9 @@ static int assign_host_irq(struct kvm *kvm,
         if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
                 return r;
 
+        snprintf(dev->irq_name, sizeof(dev->irq_name), "kvm:%s",
+                 pci_name(dev->dev));
+
         switch (host_irq_type) {
         case KVM_DEV_IRQ_HOST_INTX:
                 r = assigned_device_enable_host_intx(kvm, dev);
@@ -547,6 +515,7 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
         }
 
         pci_reset_function(dev);
+        pci_save_state(dev);
 
         match->assigned_dev_id = assigned_dev->assigned_dev_id;
         match->host_segnr = assigned_dev->segnr;
@@ -554,12 +523,10 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
         match->host_devfn = assigned_dev->devfn;
         match->flags = assigned_dev->flags;
         match->dev = dev;
-        spin_lock_init(&match->assigned_dev_lock);
+        spin_lock_init(&match->intx_lock);
         match->irq_source_id = -1;
         match->kvm = kvm;
         match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
-        INIT_WORK(&match->interrupt_work,
-                  kvm_assigned_dev_interrupt_work_handler);
 
         list_add(&match->list, &kvm->arch.assigned_dev_head);
 
@@ -579,6 +546,7 @@ out:
         mutex_unlock(&kvm->lock);
         return r;
 out_list_del:
+        pci_restore_state(dev);
         list_del(&match->list);
         pci_release_regions(dev);
 out_disable:
@@ -651,9 +619,9 @@ static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
                         r = -ENOMEM;
                         goto msix_nr_out;
                 }
-                adev->guest_msix_entries = kzalloc(
-                                sizeof(struct kvm_guest_msix_entry) *
-                                entry_nr->entry_nr, GFP_KERNEL);
+                adev->guest_msix_entries =
+                        kzalloc(sizeof(struct msix_entry) * entry_nr->entry_nr,
+                                GFP_KERNEL);
                 if (!adev->guest_msix_entries) {
                         kfree(adev->host_msix_entries);
                         r = -ENOMEM;
@@ -706,7 +674,7 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
                                   unsigned long arg)
 {
         void __user *argp = (void __user *)arg;
-        int r = -ENOTTY;
+        int r;
 
         switch (ioctl) {
         case KVM_ASSIGN_PCI_DEVICE: {
@@ -724,7 +692,6 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
                 r = -EOPNOTSUPP;
                 break;
         }
-#ifdef KVM_CAP_ASSIGN_DEV_IRQ
         case KVM_ASSIGN_DEV_IRQ: {
                 struct kvm_assigned_irq assigned_irq;
 
@@ -747,8 +714,6 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
                         goto out;
                 break;
         }
-#endif
-#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
         case KVM_DEASSIGN_PCI_DEVICE: {
                 struct kvm_assigned_pci_dev assigned_dev;
 
@@ -760,7 +725,6 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
                         goto out;
                 break;
         }
-#endif
 #ifdef KVM_CAP_IRQ_ROUTING
         case KVM_SET_GSI_ROUTING: {
                 struct kvm_irq_routing routing;
@@ -813,6 +777,9 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
                 break;
         }
 #endif
+        default:
+                r = -ENOTTY;
+                break;
         }
 out:
         return r;
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
new file mode 100644
index 000000000000..74268b4c2ee1
--- /dev/null
+++ b/virt/kvm/async_pf.c
@@ -0,0 +1,216 @@
+/*
+ * kvm asynchronous fault support
+ *
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * Author:
+ *      Gleb Natapov <gleb@redhat.com>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/mmu_context.h>
+
+#include "async_pf.h"
+#include <trace/events/kvm.h>
+
+static struct kmem_cache *async_pf_cache;
+
+int kvm_async_pf_init(void)
+{
+        async_pf_cache = KMEM_CACHE(kvm_async_pf, 0);
+
+        if (!async_pf_cache)
+                return -ENOMEM;
+
+        return 0;
+}
+
+void kvm_async_pf_deinit(void)
+{
+        if (async_pf_cache)
+                kmem_cache_destroy(async_pf_cache);
+        async_pf_cache = NULL;
+}
+
+void kvm_async_pf_vcpu_init(struct kvm_vcpu *vcpu)
+{
+        INIT_LIST_HEAD(&vcpu->async_pf.done);
+        INIT_LIST_HEAD(&vcpu->async_pf.queue);
+        spin_lock_init(&vcpu->async_pf.lock);
+}
+
+static void async_pf_execute(struct work_struct *work)
+{
+        struct page *page = NULL;
+        struct kvm_async_pf *apf =
+                container_of(work, struct kvm_async_pf, work);
+        struct mm_struct *mm = apf->mm;
+        struct kvm_vcpu *vcpu = apf->vcpu;
+        unsigned long addr = apf->addr;
+        gva_t gva = apf->gva;
+
+        might_sleep();
+
+        use_mm(mm);
+        down_read(&mm->mmap_sem);
+        get_user_pages(current, mm, addr, 1, 1, 0, &page, NULL);
+        up_read(&mm->mmap_sem);
+        unuse_mm(mm);
+
+        spin_lock(&vcpu->async_pf.lock);
+        list_add_tail(&apf->link, &vcpu->async_pf.done);
+        apf->page = page;
+        apf->done = true;
+        spin_unlock(&vcpu->async_pf.lock);
+
+        /*
+         * apf may be freed by kvm_check_async_pf_completion() after
+         * this point
+         */
+
+        trace_kvm_async_pf_completed(addr, page, gva);
+
+        if (waitqueue_active(&vcpu->wq))
+                wake_up_interruptible(&vcpu->wq);
+
+        mmdrop(mm);
+        kvm_put_kvm(vcpu->kvm);
+}
+
+void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu)
+{
+        /* cancel outstanding work queue item */
+        while (!list_empty(&vcpu->async_pf.queue)) {
+                struct kvm_async_pf *work =
+                        list_entry(vcpu->async_pf.queue.next,
+                                   typeof(*work), queue);
+                cancel_work_sync(&work->work);
+                list_del(&work->queue);
+                if (!work->done) /* work was canceled */
+                        kmem_cache_free(async_pf_cache, work);
+        }
+
+        spin_lock(&vcpu->async_pf.lock);
+        while (!list_empty(&vcpu->async_pf.done)) {
+                struct kvm_async_pf *work =
+                        list_entry(vcpu->async_pf.done.next,
+                                   typeof(*work), link);
+                list_del(&work->link);
+                if (work->page)
+                        put_page(work->page);
+                kmem_cache_free(async_pf_cache, work);
+        }
+        spin_unlock(&vcpu->async_pf.lock);
+
+        vcpu->async_pf.queued = 0;
+}
+
+void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu)
+{
+        struct kvm_async_pf *work;
+
+        while (!list_empty_careful(&vcpu->async_pf.done) &&
+              kvm_arch_can_inject_async_page_present(vcpu)) {
+                spin_lock(&vcpu->async_pf.lock);
+                work = list_first_entry(&vcpu->async_pf.done, typeof(*work),
+                                              link);
+                list_del(&work->link);
+                spin_unlock(&vcpu->async_pf.lock);
+
+                if (work->page)
+                        kvm_arch_async_page_ready(vcpu, work);
+                kvm_arch_async_page_present(vcpu, work);
+
+                list_del(&work->queue);
+                vcpu->async_pf.queued--;
+                if (work->page)
+                        put_page(work->page);
+                kmem_cache_free(async_pf_cache, work);
+        }
+}
+
+int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
+                       struct kvm_arch_async_pf *arch)
+{
+        struct kvm_async_pf *work;
+
+        if (vcpu->async_pf.queued >= ASYNC_PF_PER_VCPU)
+                return 0;
+
+        /* setup delayed work */
+
+        /*
+         * do alloc nowait since if we are going to sleep anyway we
+         * may as well sleep faulting in page
+         */
+        work = kmem_cache_zalloc(async_pf_cache, GFP_NOWAIT);
+        if (!work)
+                return 0;
+
+        work->page = NULL;
+        work->done = false;
+        work->vcpu = vcpu;
+        work->gva = gva;
+        work->addr = gfn_to_hva(vcpu->kvm, gfn);
+        work->arch = *arch;
+        work->mm = current->mm;
+        atomic_inc(&work->mm->mm_count);
+        kvm_get_kvm(work->vcpu->kvm);
+
+        /* this can't really happen otherwise gfn_to_pfn_async
+           would succeed */
+        if (unlikely(kvm_is_error_hva(work->addr)))
+                goto retry_sync;
+
+        INIT_WORK(&work->work, async_pf_execute);
+        if (!schedule_work(&work->work))
+                goto retry_sync;
+
+        list_add_tail(&work->queue, &vcpu->async_pf.queue);
+        vcpu->async_pf.queued++;
+        kvm_arch_async_page_not_present(vcpu, work);
+        return 1;
+retry_sync:
+        kvm_put_kvm(work->vcpu->kvm);
+        mmdrop(work->mm);
+        kmem_cache_free(async_pf_cache, work);
+        return 0;
+}
+
+int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
+{
+        struct kvm_async_pf *work;
+
+        if (!list_empty_careful(&vcpu->async_pf.done))
+                return 0;
+
+        work = kmem_cache_zalloc(async_pf_cache, GFP_ATOMIC);
+        if (!work)
+                return -ENOMEM;
+
+        work->page = bad_page;
+        get_page(bad_page);
+        INIT_LIST_HEAD(&work->queue); /* for list_del to work */
+
+        spin_lock(&vcpu->async_pf.lock);
+        list_add_tail(&work->link, &vcpu->async_pf.done);
+        spin_unlock(&vcpu->async_pf.lock);
+
+        vcpu->async_pf.queued++;
+        return 0;
+}
diff --git a/virt/kvm/async_pf.h b/virt/kvm/async_pf.h
new file mode 100644
index 000000000000..e7ef6447cb82
--- /dev/null
+++ b/virt/kvm/async_pf.h
@@ -0,0 +1,36 @@
+/*
+ * kvm asynchronous fault support
+ *
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * Author:
+ *      Gleb Natapov <gleb@redhat.com>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __KVM_ASYNC_PF_H__
+#define __KVM_ASYNC_PF_H__
+
+#ifdef CONFIG_KVM_ASYNC_PF
+int kvm_async_pf_init(void);
+void kvm_async_pf_deinit(void);
+void kvm_async_pf_vcpu_init(struct kvm_vcpu *vcpu);
+#else
+#define kvm_async_pf_init() (0)
+#define kvm_async_pf_deinit() do{}while(0)
+#define kvm_async_pf_vcpu_init(C) do{}while(0)
+#endif
+
+#endif
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index c1f1e3c62984..2ca4535f4fb7 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -44,14 +44,19 @@
  */
 
 struct _irqfd {
-        struct kvm               *kvm;
-        struct eventfd_ctx       *eventfd;
-        int                       gsi;
-        struct list_head          list;
-        poll_table                pt;
-        wait_queue_t              wait;
-        struct work_struct        inject;
-        struct work_struct        shutdown;
+        /* Used for MSI fast-path */
+        struct kvm *kvm;
+        wait_queue_t wait;
+        /* Update side is protected by irqfds.lock */
+        struct kvm_kernel_irq_routing_entry __rcu *irq_entry;
+        /* Used for level IRQ fast-path */
+        int gsi;
+        struct work_struct inject;
+        /* Used for setup/shutdown */
+        struct eventfd_ctx *eventfd;
+        struct list_head list;
+        poll_table pt;
+        struct work_struct shutdown;
 };
 
 static struct workqueue_struct *irqfd_cleanup_wq;
@@ -125,14 +130,22 @@ irqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key)
 {
         struct _irqfd *irqfd = container_of(wait, struct _irqfd, wait);
         unsigned long flags = (unsigned long)key;
+        struct kvm_kernel_irq_routing_entry *irq;
+        struct kvm *kvm = irqfd->kvm;
 
-        if (flags & POLLIN)
+        if (flags & POLLIN) {
+                rcu_read_lock();
+                irq = rcu_dereference(irqfd->irq_entry);
                 /* An event has been signaled, inject an interrupt */
-                schedule_work(&irqfd->inject);
+                if (irq)
+                        kvm_set_msi(irq, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1);
+                else
+                        schedule_work(&irqfd->inject);
+                rcu_read_unlock();
+        }
 
         if (flags & POLLHUP) {
                 /* The eventfd is closing, detach from KVM */
-                struct kvm *kvm = irqfd->kvm;
                 unsigned long flags;
 
                 spin_lock_irqsave(&kvm->irqfds.lock, flags);
@@ -163,9 +176,31 @@ irqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh,
         add_wait_queue(wqh, &irqfd->wait);
 }
 
+/* Must be called under irqfds.lock */
+static void irqfd_update(struct kvm *kvm, struct _irqfd *irqfd,
+                         struct kvm_irq_routing_table *irq_rt)
+{
+        struct kvm_kernel_irq_routing_entry *e;
+        struct hlist_node *n;
+
+        if (irqfd->gsi >= irq_rt->nr_rt_entries) {
+                rcu_assign_pointer(irqfd->irq_entry, NULL);
+                return;
+        }
+
+        hlist_for_each_entry(e, n, &irq_rt->map[irqfd->gsi], link) {
+                /* Only fast-path MSI. */
+                if (e->type == KVM_IRQ_ROUTING_MSI)
+                        rcu_assign_pointer(irqfd->irq_entry, e);
+                else
+                        rcu_assign_pointer(irqfd->irq_entry, NULL);
+        }
+}
+
 static int
 kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
 {
+        struct kvm_irq_routing_table *irq_rt;
         struct _irqfd *irqfd, *tmp;
         struct file *file = NULL;
         struct eventfd_ctx *eventfd = NULL;
@@ -215,6 +250,10 @@ kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
                 goto fail;
         }
 
+        irq_rt = rcu_dereference_protected(kvm->irq_routing,
+                                           lockdep_is_held(&kvm->irqfds.lock));
+        irqfd_update(kvm, irqfd, irq_rt);
+
         events = file->f_op->poll(file, &irqfd->pt);
 
         list_add_tail(&irqfd->list, &kvm->irqfds.items);
@@ -271,8 +310,17 @@ kvm_irqfd_deassign(struct kvm *kvm, int fd, int gsi)
         spin_lock_irq(&kvm->irqfds.lock);
 
         list_for_each_entry_safe(irqfd, tmp, &kvm->irqfds.items, list) {
-                if (irqfd->eventfd == eventfd && irqfd->gsi == gsi)
+                if (irqfd->eventfd == eventfd && irqfd->gsi == gsi) {
+                        /*
+                         * This rcu_assign_pointer is needed for when
+                         * another thread calls kvm_irqfd_update before
+                         * we flush workqueue below.
+                         * It is paired with synchronize_rcu done by caller
+                         * of that function.
+                         */
+                        rcu_assign_pointer(irqfd->irq_entry, NULL);
                         irqfd_deactivate(irqfd);
+                }
         }
 
         spin_unlock_irq(&kvm->irqfds.lock);
@@ -322,6 +370,25 @@ kvm_irqfd_release(struct kvm *kvm)
 }
 
 /*
+ * Change irq_routing and irqfd.
+ * Caller must invoke synchronize_rcu afterwards.
+ */
+void kvm_irq_routing_update(struct kvm *kvm,
+                            struct kvm_irq_routing_table *irq_rt)
+{
+        struct _irqfd *irqfd;
+
+        spin_lock_irq(&kvm->irqfds.lock);
+
+        rcu_assign_pointer(kvm->irq_routing, irq_rt);
+
+        list_for_each_entry(irqfd, &kvm->irqfds.items, list)
+                irqfd_update(kvm, irqfd, irq_rt);
+
+        spin_unlock_irq(&kvm->irqfds.lock);
+}
+
+/*
  * create a host-wide workqueue for issuing deferred shutdown requests
  * aggregated from all vm* instances. We need our own isolated single-thread
  * queue to prevent deadlock against flushing the normal work-queue.
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 8edca9141b78..9f614b4e365f 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -114,8 +114,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
         return r;
 }
 
-static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
-                       struct kvm *kvm, int irq_source_id, int level)
+int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
+                struct kvm *kvm, int irq_source_id, int level)
 {
         struct kvm_lapic_irq irq;
 
@@ -409,8 +409,9 @@ int kvm_set_irq_routing(struct kvm *kvm,
 
         mutex_lock(&kvm->irq_lock);
         old = kvm->irq_routing;
-        rcu_assign_pointer(kvm->irq_routing, new);
+        kvm_irq_routing_update(kvm, new);
         mutex_unlock(&kvm->irq_lock);
+
         synchronize_rcu();
 
         new = old;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 5225052aebc1..7f686251f711 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -55,6 +55,7 @@
 #include <asm-generic/bitops/le.h>
 
 #include "coalesced_mmio.h"
+#include "async_pf.h"
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/kvm.h>
@@ -89,7 +90,8 @@ static void hardware_disable_all(void);
 
 static void kvm_io_bus_destroy(struct kvm_io_bus *bus);
 
-static bool kvm_rebooting;
+bool kvm_rebooting;
+EXPORT_SYMBOL_GPL(kvm_rebooting);
 
 static bool largepages_enabled = true;
 
@@ -167,8 +169,12 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
 
 void kvm_flush_remote_tlbs(struct kvm *kvm)
 {
+        int dirty_count = kvm->tlbs_dirty;
+
+        smp_mb();
         if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
                 ++kvm->stat.remote_tlb_flush;
+        cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
 }
 
 void kvm_reload_remote_mmus(struct kvm *kvm)
@@ -186,6 +192,7 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
         vcpu->kvm = kvm;
         vcpu->vcpu_id = id;
         init_waitqueue_head(&vcpu->wq);
+        kvm_async_pf_vcpu_init(vcpu);
 
         page = alloc_page(GFP_KERNEL | __GFP_ZERO);
         if (!page) {
@@ -247,7 +254,7 @@ static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn,
         idx = srcu_read_lock(&kvm->srcu);
         spin_lock(&kvm->mmu_lock);
         kvm->mmu_notifier_seq++;
-        need_tlb_flush = kvm_unmap_hva(kvm, address);
+        need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty;
         spin_unlock(&kvm->mmu_lock);
         srcu_read_unlock(&kvm->srcu, idx);
 
@@ -291,6 +298,7 @@ static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
         kvm->mmu_notifier_count++;
         for (; start < end; start += PAGE_SIZE)
                 need_tlb_flush |= kvm_unmap_hva(kvm, start);
+        need_tlb_flush |= kvm->tlbs_dirty;
         spin_unlock(&kvm->mmu_lock);
         srcu_read_unlock(&kvm->srcu, idx);
 
@@ -381,11 +389,15 @@ static int kvm_init_mmu_notifier(struct kvm *kvm)
 
 static struct kvm *kvm_create_vm(void)
 {
-        int r = 0, i;
-        struct kvm *kvm = kvm_arch_create_vm();
+        int r, i;
+        struct kvm *kvm = kvm_arch_alloc_vm();
 
-        if (IS_ERR(kvm))
-                goto out;
+        if (!kvm)
+                return ERR_PTR(-ENOMEM);
+
+        r = kvm_arch_init_vm(kvm);
+        if (r)
+                goto out_err_nodisable;
 
         r = hardware_enable_all();
         if (r)
@@ -399,23 +411,19 @@ static struct kvm *kvm_create_vm(void)
         r = -ENOMEM;
         kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
         if (!kvm->memslots)
-                goto out_err;
+                goto out_err_nosrcu;
         if (init_srcu_struct(&kvm->srcu))
-                goto out_err;
+                goto out_err_nosrcu;
         for (i = 0; i < KVM_NR_BUSES; i++) {
                 kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus),
                                         GFP_KERNEL);
-                if (!kvm->buses[i]) {
-                        cleanup_srcu_struct(&kvm->srcu);
+                if (!kvm->buses[i])
                         goto out_err;
-                }
         }
 
         r = kvm_init_mmu_notifier(kvm);
-        if (r) {
-                cleanup_srcu_struct(&kvm->srcu);
+        if (r)
                 goto out_err;
-        }
 
         kvm->mm = current->mm;
         atomic_inc(&kvm->mm->mm_count);
@@ -429,19 +437,35 @@ static struct kvm *kvm_create_vm(void)
         spin_lock(&kvm_lock);
         list_add(&kvm->vm_list, &vm_list);
         spin_unlock(&kvm_lock);
-out:
+
         return kvm;
 
 out_err:
+        cleanup_srcu_struct(&kvm->srcu);
+out_err_nosrcu:
         hardware_disable_all();
 out_err_nodisable:
         for (i = 0; i < KVM_NR_BUSES; i++)
                 kfree(kvm->buses[i]);
         kfree(kvm->memslots);
-        kfree(kvm);
+        kvm_arch_free_vm(kvm);
         return ERR_PTR(r);
 }
 
+static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
+{
+        if (!memslot->dirty_bitmap)
+                return;
+
+        if (2 * kvm_dirty_bitmap_bytes(memslot) > PAGE_SIZE)
+                vfree(memslot->dirty_bitmap_head);
+        else
+                kfree(memslot->dirty_bitmap_head);
+
+        memslot->dirty_bitmap = NULL;
+        memslot->dirty_bitmap_head = NULL;
+}
+
 /*
  * Free any memory in @free but not in @dont.
  */
@@ -454,7 +478,7 @@ static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
                 vfree(free->rmap);
 
         if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
-                vfree(free->dirty_bitmap);
+                kvm_destroy_dirty_bitmap(free);
 
 
         for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) {
@@ -465,7 +489,6 @@ static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
         }
 
         free->npages = 0;
-        free->dirty_bitmap = NULL;
         free->rmap = NULL;
 }
 
@@ -499,6 +522,9 @@ static void kvm_destroy_vm(struct kvm *kvm)
         kvm_arch_flush_shadow(kvm);
 #endif
         kvm_arch_destroy_vm(kvm);
+        kvm_free_physmem(kvm);
+        cleanup_srcu_struct(&kvm->srcu);
+        kvm_arch_free_vm(kvm);
         hardware_disable_all();
         mmdrop(mm);
 }
@@ -528,6 +554,27 @@ static int kvm_vm_release(struct inode *inode, struct file *filp)
 }
 
 /*
+ * Allocation size is twice as large as the actual dirty bitmap size.
+ * This makes it possible to do double buffering: see x86's
+ * kvm_vm_ioctl_get_dirty_log().
+ */
+static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
+{
+        unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
+
+        if (dirty_bytes > PAGE_SIZE)
+                memslot->dirty_bitmap = vzalloc(dirty_bytes);
+        else
+                memslot->dirty_bitmap = kzalloc(dirty_bytes, GFP_KERNEL);
+
+        if (!memslot->dirty_bitmap)
+                return -ENOMEM;
+
+        memslot->dirty_bitmap_head = memslot->dirty_bitmap;
+        return 0;
+}
+
+/*
  * Allocate some memory and give it an address in the guest physical address
  * space.
  *
@@ -604,13 +651,11 @@ int __kvm_set_memory_region(struct kvm *kvm,
         /* Allocate if a slot is being created */
 #ifndef CONFIG_S390
         if (npages && !new.rmap) {
-                new.rmap = vmalloc(npages * sizeof(*new.rmap));
+                new.rmap = vzalloc(npages * sizeof(*new.rmap));
 
                 if (!new.rmap)
                         goto out_free;
 
-                memset(new.rmap, 0, npages * sizeof(*new.rmap));
-
                 new.user_alloc = user_alloc;
                 new.userspace_addr = mem->userspace_addr;
         }
@@ -633,14 +678,11 @@ int __kvm_set_memory_region(struct kvm *kvm,
                              >> KVM_HPAGE_GFN_SHIFT(level));
                 lpages -= base_gfn >> KVM_HPAGE_GFN_SHIFT(level);
 
-                new.lpage_info[i] = vmalloc(lpages * sizeof(*new.lpage_info[i]));
+                new.lpage_info[i] = vzalloc(lpages * sizeof(*new.lpage_info[i]));
 
                 if (!new.lpage_info[i])
                         goto out_free;
 
-                memset(new.lpage_info[i], 0,
-                       lpages * sizeof(*new.lpage_info[i]));
-
                 if (base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
                         new.lpage_info[i][0].write_count = 1;
                 if ((base_gfn+npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
@@ -661,12 +703,8 @@ skip_lpage:
 
         /* Allocate page dirty bitmap if needed */
         if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
-                unsigned long dirty_bytes = kvm_dirty_bitmap_bytes(&new);
-
-                new.dirty_bitmap = vmalloc(dirty_bytes);
-                if (!new.dirty_bitmap)
+                if (kvm_create_dirty_bitmap(&new) < 0)
                         goto out_free;
-                memset(new.dirty_bitmap, 0, dirty_bytes);
                 /* destroy any largepage mappings for dirty tracking */
                 if (old.npages)
                         flush_shadow = 1;
@@ -685,6 +723,7 @@ skip_lpage:
                 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
                 if (mem->slot >= slots->nmemslots)
                         slots->nmemslots = mem->slot + 1;
+                slots->generation++;
                 slots->memslots[mem->slot].flags |= KVM_MEMSLOT_INVALID;
 
                 old_memslots = kvm->memslots;
@@ -719,6 +758,7 @@ skip_lpage:
         memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
         if (mem->slot >= slots->nmemslots)
                 slots->nmemslots = mem->slot + 1;
+        slots->generation++;
 
         /* actual memory is freed via old in kvm_free_physmem_slot below */
         if (!npages) {
@@ -849,10 +889,10 @@ int kvm_is_error_hva(unsigned long addr)
 }
 EXPORT_SYMBOL_GPL(kvm_is_error_hva);
 
-struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+static struct kvm_memory_slot *__gfn_to_memslot(struct kvm_memslots *slots,
+                                                gfn_t gfn)
 {
         int i;
-        struct kvm_memslots *slots = kvm_memslots(kvm);
 
         for (i = 0; i < slots->nmemslots; ++i) {
                 struct kvm_memory_slot *memslot = &slots->memslots[i];
@@ -863,6 +903,11 @@ struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
         }
         return NULL;
 }
+
+struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+{
+        return __gfn_to_memslot(kvm_memslots(kvm), gfn);
+}
 EXPORT_SYMBOL_GPL(gfn_to_memslot);
 
 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
@@ -925,12 +970,9 @@ int memslot_id(struct kvm *kvm, gfn_t gfn)
         return memslot - slots->memslots;
 }
 
-static unsigned long gfn_to_hva_many(struct kvm *kvm, gfn_t gfn,
+static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn,
                                      gfn_t *nr_pages)
 {
-        struct kvm_memory_slot *slot;
-
-        slot = gfn_to_memslot(kvm, gfn);
         if (!slot || slot->flags & KVM_MEMSLOT_INVALID)
                 return bad_hva();
 
@@ -942,28 +984,61 @@ static unsigned long gfn_to_hva_many(struct kvm *kvm, gfn_t gfn,
 
 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
 {
-        return gfn_to_hva_many(kvm, gfn, NULL);
+        return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL);
 }
 EXPORT_SYMBOL_GPL(gfn_to_hva);
 
-static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic)
+static pfn_t get_fault_pfn(void)
+{
+        get_page(fault_page);
+        return fault_pfn;
+}
+
+static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic,
+                        bool *async, bool write_fault, bool *writable)
 {
         struct page *page[1];
-        int npages;
+        int npages = 0;
         pfn_t pfn;
 
-        if (atomic)
+        /* we can do it either atomically or asynchronously, not both */
+        BUG_ON(atomic && async);
+
+        BUG_ON(!write_fault && !writable);
+
+        if (writable)
+                *writable = true;
+
+        if (atomic || async)
                 npages = __get_user_pages_fast(addr, 1, 1, page);
-        else {
+
+        if (unlikely(npages != 1) && !atomic) {
                 might_sleep();
-                npages = get_user_pages_fast(addr, 1, 1, page);
+
+                if (writable)
+                        *writable = write_fault;
+
+                npages = get_user_pages_fast(addr, 1, write_fault, page);
+
+                /* map read fault as writable if possible */
+                if (unlikely(!write_fault) && npages == 1) {
+                        struct page *wpage[1];
+
+                        npages = __get_user_pages_fast(addr, 1, 1, wpage);
+                        if (npages == 1) {
+                                *writable = true;
+                                put_page(page[0]);
+                                page[0] = wpage[0];
+                        }
+                        npages = 1;
+                }
         }
 
         if (unlikely(npages != 1)) {
                 struct vm_area_struct *vma;
 
                 if (atomic)
-                        goto return_fault_page;
+                        return get_fault_pfn();
 
                 down_read(&current->mm->mmap_sem);
                 if (is_hwpoison_address(addr)) {
@@ -972,19 +1047,20 @@ static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic)
                         return page_to_pfn(hwpoison_page);
                 }
 
-                vma = find_vma(current->mm, addr);
-
-                if (vma == NULL || addr < vma->vm_start ||
-                    !(vma->vm_flags & VM_PFNMAP)) {
-                        up_read(&current->mm->mmap_sem);
-return_fault_page:
-                        get_page(fault_page);
-                        return page_to_pfn(fault_page);
+                vma = find_vma_intersection(current->mm, addr, addr+1);
+
+                if (vma == NULL)
+                        pfn = get_fault_pfn();
+                else if ((vma->vm_flags & VM_PFNMAP)) {
+                        pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) +
+                                vma->vm_pgoff;
+                        BUG_ON(!kvm_is_mmio_pfn(pfn));
+                } else {
+                        if (async && (vma->vm_flags & VM_WRITE))
+                                *async = true;
+                        pfn = get_fault_pfn();
                 }
-
-                pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
                 up_read(&current->mm->mmap_sem);
-                BUG_ON(!kvm_is_mmio_pfn(pfn));
         } else
                 pfn = page_to_pfn(page[0]);
 
@@ -993,40 +1069,58 @@ return_fault_page:
 
 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr)
 {
-        return hva_to_pfn(kvm, addr, true);
+        return hva_to_pfn(kvm, addr, true, NULL, true, NULL);
 }
 EXPORT_SYMBOL_GPL(hva_to_pfn_atomic);
 
-static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic)
+static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async,
+                          bool write_fault, bool *writable)
 {
         unsigned long addr;
 
+        if (async)
+                *async = false;
+
         addr = gfn_to_hva(kvm, gfn);
         if (kvm_is_error_hva(addr)) {
                 get_page(bad_page);
                 return page_to_pfn(bad_page);
         }
 
-        return hva_to_pfn(kvm, addr, atomic);
+        return hva_to_pfn(kvm, addr, atomic, async, write_fault, writable);
 }
 
 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn)
 {
-        return __gfn_to_pfn(kvm, gfn, true);
+        return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL);
 }
 EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic);
 
+pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
+                       bool write_fault, bool *writable)
+{
+        return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable);
+}
+EXPORT_SYMBOL_GPL(gfn_to_pfn_async);
+
 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
 {
-        return __gfn_to_pfn(kvm, gfn, false);
+        return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL);
 }
 EXPORT_SYMBOL_GPL(gfn_to_pfn);
 
+pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
+                      bool *writable)
+{
+        return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable);
+}
+EXPORT_SYMBOL_GPL(gfn_to_pfn_prot);
+
 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
                          struct kvm_memory_slot *slot, gfn_t gfn)
 {
         unsigned long addr = gfn_to_hva_memslot(slot, gfn);
-        return hva_to_pfn(kvm, addr, false);
+        return hva_to_pfn(kvm, addr, false, NULL, true, NULL);
 }
 
 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
@@ -1035,7 +1129,7 @@ int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
         unsigned long addr;
         gfn_t entry;
 
-        addr = gfn_to_hva_many(kvm, gfn, &entry);
+        addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry);
         if (kvm_is_error_hva(addr))
                 return -1;
 
@@ -1219,9 +1313,51 @@ int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
         return 0;
 }
 
+int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+                              gpa_t gpa)
+{
+        struct kvm_memslots *slots = kvm_memslots(kvm);
+        int offset = offset_in_page(gpa);
+        gfn_t gfn = gpa >> PAGE_SHIFT;
+
+        ghc->gpa = gpa;
+        ghc->generation = slots->generation;
+        ghc->memslot = __gfn_to_memslot(slots, gfn);
+        ghc->hva = gfn_to_hva_many(ghc->memslot, gfn, NULL);
+        if (!kvm_is_error_hva(ghc->hva))
+                ghc->hva += offset;
+        else
+                return -EFAULT;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init);
+
+int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+                           void *data, unsigned long len)
+{
+        struct kvm_memslots *slots = kvm_memslots(kvm);
+        int r;
+
+        if (slots->generation != ghc->generation)
+                kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa);
+
+        if (kvm_is_error_hva(ghc->hva))
+                return -EFAULT;
+
+        r = copy_to_user((void __user *)ghc->hva, data, len);
+        if (r)
+                return -EFAULT;
+        mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_write_guest_cached);
+
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
 {
-        return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
+        return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page,
+                                    offset, len);
 }
 EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
 
@@ -1244,11 +1380,9 @@ int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
 }
 EXPORT_SYMBOL_GPL(kvm_clear_guest);
 
-void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
+void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
+                             gfn_t gfn)
 {
-        struct kvm_memory_slot *memslot;
-
-        memslot = gfn_to_memslot(kvm, gfn);
         if (memslot && memslot->dirty_bitmap) {
                 unsigned long rel_gfn = gfn - memslot->base_gfn;
 
@@ -1256,6 +1390,14 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
         }
 }
 
+void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
+{
+        struct kvm_memory_slot *memslot;
+
+        memslot = gfn_to_memslot(kvm, gfn);
+        mark_page_dirty_in_slot(kvm, memslot, gfn);
+}
+
 /*
  * The vCPU has executed a HLT instruction with in-kernel mode enabled.
  */
@@ -1457,6 +1599,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
                 if (arg)
                         goto out;
                 r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
+                trace_kvm_userspace_exit(vcpu->run->exit_reason, r);
                 break;
         case KVM_GET_REGS: {
                 struct kvm_regs *kvm_regs;
@@ -1824,7 +1967,7 @@ static struct file_operations kvm_vm_fops = {
 
 static int kvm_dev_ioctl_create_vm(void)
 {
-        int fd, r;
+        int r;
         struct kvm *kvm;
 
         kvm = kvm_create_vm();
@@ -1837,11 +1980,11 @@ static int kvm_dev_ioctl_create_vm(void)
                 return r;
         }
 #endif
-        fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR);
-        if (fd < 0)
+        r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR);
+        if (r < 0)
                 kvm_put_kvm(kvm);
 
-        return fd;
+        return r;
 }
 
 static long kvm_dev_ioctl_check_extension_generic(long arg)
@@ -1922,7 +2065,7 @@ static struct miscdevice kvm_dev = {
         &kvm_chardev_ops,
 };
 
-static void hardware_enable(void *junk)
+static void hardware_enable_nolock(void *junk)
 {
         int cpu = raw_smp_processor_id();
         int r;
@@ -1942,7 +2085,14 @@ static void hardware_enable(void *junk)
         }
 }
 
-static void hardware_disable(void *junk)
+static void hardware_enable(void *junk)
+{
+        spin_lock(&kvm_lock);
+        hardware_enable_nolock(junk);
+        spin_unlock(&kvm_lock);
+}
+
+static void hardware_disable_nolock(void *junk)
 {
         int cpu = raw_smp_processor_id();
 
@@ -1952,13 +2102,20 @@ static void hardware_disable(void *junk)
         kvm_arch_hardware_disable(NULL);
 }
 
+static void hardware_disable(void *junk)
+{
+        spin_lock(&kvm_lock);
+        hardware_disable_nolock(junk);
+        spin_unlock(&kvm_lock);
+}
+
 static void hardware_disable_all_nolock(void)
 {
         BUG_ON(!kvm_usage_count);
 
         kvm_usage_count--;
         if (!kvm_usage_count)
-                on_each_cpu(hardware_disable, NULL, 1);
+                on_each_cpu(hardware_disable_nolock, NULL, 1);
 }
 
 static void hardware_disable_all(void)
@@ -1977,7 +2134,7 @@ static int hardware_enable_all(void)
         kvm_usage_count++;
         if (kvm_usage_count == 1) {
                 atomic_set(&hardware_enable_failed, 0);
-                on_each_cpu(hardware_enable, NULL, 1);
+                on_each_cpu(hardware_enable_nolock, NULL, 1);
 
                 if (atomic_read(&hardware_enable_failed)) {
                         hardware_disable_all_nolock();
@@ -2008,27 +2165,19 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
         case CPU_STARTING:
                 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
                        cpu);
-                spin_lock(&kvm_lock);
                 hardware_enable(NULL);
-                spin_unlock(&kvm_lock);
                 break;
         }
         return NOTIFY_OK;
 }
 
 
-asmlinkage void kvm_handle_fault_on_reboot(void)
+asmlinkage void kvm_spurious_fault(void)
 {
-        if (kvm_rebooting) {
-                /* spin while reset goes on */
-                local_irq_enable();
-                while (true)
-                        cpu_relax();
-        }
         /* Fault while not rebooting.  We want the trace. */
         BUG();
 }
-EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot);
+EXPORT_SYMBOL_GPL(kvm_spurious_fault);
 
 static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
                       void *v)
@@ -2041,7 +2190,7 @@ static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
          */
         printk(KERN_INFO "kvm: exiting hardware virtualization\n");
         kvm_rebooting = true;
-        on_each_cpu(hardware_disable, NULL, 1);
+        on_each_cpu(hardware_disable_nolock, NULL, 1);
         return NOTIFY_OK;
 }
 
@@ -2211,7 +2360,7 @@ static void kvm_exit_debug(void)
 static int kvm_suspend(struct sys_device *dev, pm_message_t state)
 {
         if (kvm_usage_count)
-                hardware_disable(NULL);
+                hardware_disable_nolock(NULL);
         return 0;
 }
 
@@ -2219,7 +2368,7 @@ static int kvm_resume(struct sys_device *dev)
 {
         if (kvm_usage_count) {
                 WARN_ON(spin_is_locked(&kvm_lock));
-                hardware_enable(NULL);
+                hardware_enable_nolock(NULL);
         }
         return 0;
 }
@@ -2336,6 +2485,10 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
                 goto out_free_5;
         }
 
+        r = kvm_async_pf_init();
+        if (r)
+                goto out_free;
+
         kvm_chardev_ops.owner = module;
         kvm_vm_fops.owner = module;
         kvm_vcpu_fops.owner = module;
@@ -2343,7 +2496,7 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
         r = misc_register(&kvm_dev);
         if (r) {
                 printk(KERN_ERR "kvm: misc device register failed\n");
-                goto out_free;
+                goto out_unreg;
         }
 
         kvm_preempt_ops.sched_in = kvm_sched_in;
@@ -2353,6 +2506,8 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 
         return 0;
 
+out_unreg:
+        kvm_async_pf_deinit();
 out_free:
         kmem_cache_destroy(kvm_vcpu_cache);
 out_free_5:
@@ -2385,11 +2540,12 @@ void kvm_exit(void)
         kvm_exit_debug();
         misc_deregister(&kvm_dev);
         kmem_cache_destroy(kvm_vcpu_cache);
+        kvm_async_pf_deinit();
         sysdev_unregister(&kvm_sysdev);
         sysdev_class_unregister(&kvm_sysdev_class);
         unregister_reboot_notifier(&kvm_reboot_notifier);
         unregister_cpu_notifier(&kvm_cpu_notifier);
-        on_each_cpu(hardware_disable, NULL, 1);
+        on_each_cpu(hardware_disable_nolock, NULL, 1);
         kvm_arch_hardware_unsetup();
         kvm_arch_exit();
         free_cpumask_var(cpus_hardware_enabled);