Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (80 commits)
  KVM: Use CPU_DYING for disabling virtualization
  KVM: Tune hotplug/suspend IPIs
  KVM: Keep track of which cpus have virtualization enabled
  SMP: Allow smp_call_function_single() to current cpu
  i386: Allow smp_call_function_single() to current cpu
  x86_64: Allow smp_call_function_single() to current cpu
  HOTPLUG: Adapt thermal throttle to CPU_DYING
  HOTPLUG: Adapt cpuset hotplug callback to CPU_DYING
  HOTPLUG: Add CPU_DYING notifier
  KVM: Clean up #includes
  KVM: Remove kvmfs in favor of the anonymous inodes source
  KVM: SVM: Reliably detect if SVM was disabled by BIOS
  KVM: VMX: Remove unnecessary code in vmx_tlb_flush()
  KVM: MMU: Fix Wrong tlb flush order
  KVM: VMX: Reinitialize the real-mode tss when entering real mode
  KVM: Avoid useless memory write when possible
  KVM: Fix x86 emulator writeback
  KVM: Add support for in-kernel pio handlers
  KVM: VMX: Fix interrupt checking on lightweight exit
  KVM: Adds support for in-kernel mmio handlers
  ...

1 files changed, 37 insertions, 22 deletions

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index fa17d6d4f0cb..bc818cc126e3 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -14,16 +14,17 @@
  *
  */
 
+#include "kvm_svm.h"
+#include "x86_emulate.h"
+
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/vmalloc.h>
 #include <linux/highmem.h>
 #include <linux/profile.h>
 #include <linux/sched.h>
-#include <asm/desc.h>
 
-#include "kvm_svm.h"
-#include "x86_emulate.h"
+#include <asm/desc.h>
 
 MODULE_AUTHOR("Qumranet");
 MODULE_LICENSE("GPL");
@@ -378,7 +379,7 @@ static __init int svm_hardware_setup(void)
         int cpu;
         struct page *iopm_pages;
         struct page *msrpm_pages;
-        void *msrpm_va;
+        void *iopm_va, *msrpm_va;
         int r;
 
         kvm_emulator_want_group7_invlpg();
@@ -387,8 +388,10 @@ static __init int svm_hardware_setup(void)
 
         if (!iopm_pages)
                 return -ENOMEM;
-        memset(page_address(iopm_pages), 0xff,
-                                        PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
+
+        iopm_va = page_address(iopm_pages);
+        memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
+        clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 
 
@@ -579,7 +582,7 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu)
                 goto out2;
 
         vcpu->svm->vmcb = page_address(page);
-        memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
+        clear_page(vcpu->svm->vmcb);
         vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
         vcpu->svm->asid_generation = 0;
         memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
@@ -587,9 +590,9 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu)
 
         fx_init(vcpu);
         vcpu->fpu_active = 1;
-        vcpu->apic_base = 0xfee00000 |
-                        /*for vcpu 0*/ MSR_IA32_APICBASE_BSP |
-                        MSR_IA32_APICBASE_ENABLE;
+        vcpu->apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
+        if (vcpu == &vcpu->kvm->vcpus[0])
+                vcpu->apic_base |= MSR_IA32_APICBASE_BSP;
 
         return 0;
 
@@ -955,7 +958,7 @@ static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
          * VMCB is undefined after a SHUTDOWN intercept
          * so reinitialize it.
          */
-        memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
+        clear_page(vcpu->svm->vmcb);
         init_vmcb(vcpu->svm->vmcb);
 
         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
@@ -1113,12 +1116,7 @@ static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
         skip_emulated_instruction(vcpu);
-        if (vcpu->irq_summary)
-                return 1;
-
-        kvm_run->exit_reason = KVM_EXIT_HLT;
-        ++vcpu->stat.halt_exits;
-        return 0;
+        return kvm_emulate_halt(vcpu);
 }
 
 static int vmmcall_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
@@ -1473,6 +1471,11 @@ static void load_db_regs(unsigned long *db_regs)
         asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
 }
 
+static void svm_flush_tlb(struct kvm_vcpu *vcpu)
+{
+        force_new_asid(vcpu);
+}
+
 static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
         u16 fs_selector;
@@ -1481,11 +1484,20 @@ static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         int r;
 
 again:
+        r = kvm_mmu_reload(vcpu);
+        if (unlikely(r))
+                return r;
+
         if (!vcpu->mmio_read_completed)
                 do_interrupt_requests(vcpu, kvm_run);
 
         clgi();
 
+        vcpu->guest_mode = 1;
+        if (vcpu->requests)
+                if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
+                    svm_flush_tlb(vcpu);
+
         pre_svm_run(vcpu);
 
         save_host_msrs(vcpu);
@@ -1617,6 +1629,8 @@ again:
 #endif
                 : "cc", "memory" );
 
+        vcpu->guest_mode = 0;
+
         if (vcpu->fpu_active) {
                 fx_save(vcpu->guest_fx_image);
                 fx_restore(vcpu->host_fx_image);
@@ -1681,11 +1695,6 @@ again:
         return r;
 }
 
-static void svm_flush_tlb(struct kvm_vcpu *vcpu)
-{
-        force_new_asid(vcpu);
-}
-
 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
 {
         vcpu->svm->vmcb->save.cr3 = root;
@@ -1727,6 +1736,12 @@ static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
 
 static int is_disabled(void)
 {
+        u64 vm_cr;
+
+        rdmsrl(MSR_VM_CR, vm_cr);
+        if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
+                return 1;
+
         return 0;
 }