16 files changed, 115 insertions, 34 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8ec3a1aa4abd..50a1d1f9b6d3 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -746,10 +746,10 @@ config SWIOTLB
         def_bool y if X86_64
         ---help---
           Support for software bounce buffers used on x86-64 systems
-          which don't have a hardware IOMMU (e.g. the current generation
-          of Intel's x86-64 CPUs). Using this PCI devices which can only
-          access 32-bits of memory can be used on systems with more than
-          3 GB of memory. If unsure, say Y.
+          which don't have a hardware IOMMU. Using this PCI devices
+          which can only access 32-bits of memory can be used on systems
+          with more than 3 GB of memory.
+          If unsure, say Y.
 
 config IOMMU_HELPER
         def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 682e9c210baa..474ca35b1bce 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -142,7 +142,7 @@ KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
 KBUILD_CFLAGS += $(mflags-y)
 KBUILD_AFLAGS += $(mflags-y)
 
-archscripts:
+archscripts: scripts_basic
         $(Q)$(MAKE) $(build)=arch/x86/tools relocs
 
 ###
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index 93971e841dd5..472b9b783019 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -51,7 +51,8 @@ extern unsigned long set_phys_range_identity(unsigned long pfn_s,
 
 extern int m2p_add_override(unsigned long mfn, struct page *page,
                             struct gnttab_map_grant_ref *kmap_op);
-extern int m2p_remove_override(struct page *page, bool clear_pte);
+extern int m2p_remove_override(struct page *page,
+                                struct gnttab_map_grant_ref *kmap_op);
 extern struct page *m2p_find_override(unsigned long mfn);
 extern unsigned long m2p_find_override_pfn(unsigned long mfn, unsigned long pfn);
 
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 6605a81ba339..8b6defe7eefc 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -586,6 +586,8 @@ extern struct event_constraint intel_westmere_pebs_event_constraints[];
 
 extern struct event_constraint intel_snb_pebs_event_constraints[];
 
+extern struct event_constraint intel_ivb_pebs_event_constraints[];
+
 struct event_constraint *intel_pebs_constraints(struct perf_event *event);
 
 void intel_pmu_pebs_enable(struct perf_event *event);
diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
index 7bfb5bec8630..eebd5ffe1bba 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
@@ -209,6 +209,15 @@ static int perf_ibs_precise_event(struct perf_event *event, u64 *config)
         return -EOPNOTSUPP;
 }
 
+static const struct perf_event_attr ibs_notsupp = {
+        .exclude_user   = 1,
+        .exclude_kernel = 1,
+        .exclude_hv     = 1,
+        .exclude_idle   = 1,
+        .exclude_host   = 1,
+        .exclude_guest  = 1,
+};
+
 static int perf_ibs_init(struct perf_event *event)
 {
         struct hw_perf_event *hwc = &event->hw;
@@ -229,6 +238,9 @@ static int perf_ibs_init(struct perf_event *event)
         if (event->pmu != &perf_ibs->pmu)
                 return -ENOENT;
 
+        if (perf_flags(&event->attr) & perf_flags(&ibs_notsupp))
+                return -EINVAL;
+
         if (config & ~perf_ibs->config_mask)
                 return -EINVAL;
 
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 7f2739e03e79..6bca492b8547 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -2008,6 +2008,7 @@ __init int intel_pmu_init(void)
                 break;
 
         case 28: /* Atom */
+        case 54: /* Cedariew */
                 memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
                        sizeof(hw_cache_event_ids));
 
@@ -2047,7 +2048,6 @@ __init int intel_pmu_init(void)
         case 42: /* SandyBridge */
         case 45: /* SandyBridge, "Romely-EP" */
                 x86_add_quirk(intel_sandybridge_quirk);
-        case 58: /* IvyBridge */
                 memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
                        sizeof(hw_cache_event_ids));
                 memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
@@ -2072,6 +2072,29 @@ __init int intel_pmu_init(void)
 
                 pr_cont("SandyBridge events, ");
                 break;
+        case 58: /* IvyBridge */
+                memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
+                       sizeof(hw_cache_event_ids));
+                memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
+                       sizeof(hw_cache_extra_regs));
+
+                intel_pmu_lbr_init_snb();
+
+                x86_pmu.event_constraints = intel_snb_event_constraints;
+                x86_pmu.pebs_constraints = intel_ivb_pebs_event_constraints;
+                x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
+                x86_pmu.extra_regs = intel_snb_extra_regs;
+                /* all extra regs are per-cpu when HT is on */
+                x86_pmu.er_flags |= ERF_HAS_RSP_1;
+                x86_pmu.er_flags |= ERF_NO_HT_SHARING;
+
+                /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
+                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
+                        X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
+
+                pr_cont("IvyBridge events, ");
+                break;
+
 
         default:
                 switch (x86_pmu.version) {
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index e38d97bf4259..826054a4f2ee 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -407,6 +407,20 @@ struct event_constraint intel_snb_pebs_event_constraints[] = {
         EVENT_CONSTRAINT_END
 };
 
+struct event_constraint intel_ivb_pebs_event_constraints[] = {
+        INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
+        INTEL_UEVENT_CONSTRAINT(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
+        INTEL_UEVENT_CONSTRAINT(0x02c2, 0xf), /* UOPS_RETIRED.RETIRE_SLOTS */
+        INTEL_EVENT_CONSTRAINT(0xc4, 0xf),    /* BR_INST_RETIRED.* */
+        INTEL_EVENT_CONSTRAINT(0xc5, 0xf),    /* BR_MISP_RETIRED.* */
+        INTEL_EVENT_CONSTRAINT(0xcd, 0x8),    /* MEM_TRANS_RETIRED.* */
+        INTEL_EVENT_CONSTRAINT(0xd0, 0xf),    /* MEM_UOP_RETIRED.* */
+        INTEL_EVENT_CONSTRAINT(0xd1, 0xf),    /* MEM_LOAD_UOPS_RETIRED.* */
+        INTEL_EVENT_CONSTRAINT(0xd2, 0xf),    /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
+        INTEL_EVENT_CONSTRAINT(0xd3, 0xf),    /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
+        EVENT_CONSTRAINT_END
+};
+
 struct event_constraint *intel_pebs_constraints(struct perf_event *event)
 {
         struct event_constraint *c;
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index 520b4265fcd2..da02e9cc3754 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -686,7 +686,8 @@ void intel_pmu_lbr_init_atom(void)
          * to have an operational LBR which can freeze
          * on PMU interrupt
          */
-        if (boot_cpu_data.x86_mask < 10) {
+        if (boot_cpu_data.x86_model == 28
+            && boot_cpu_data.x86_mask < 10) {
                 pr_cont("LBR disabled due to erratum");
                 return;
         }
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 0a5571080e74..38e4894165b9 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -661,6 +661,11 @@ static void snb_uncore_msr_init_box(struct intel_uncore_box *box)
         }
 }
 
+static struct uncore_event_desc snb_uncore_events[] = {
+        INTEL_UNCORE_EVENT_DESC(clockticks, "event=0xff,umask=0x00"),
+        { /* end: all zeroes */ },
+};
+
 static struct attribute *snb_uncore_formats_attr[] = {
         &format_attr_event.attr,
         &format_attr_umask.attr,
@@ -704,6 +709,7 @@ static struct intel_uncore_type snb_uncore_cbox = {
         .constraints    = snb_uncore_cbox_constraints,
         .ops            = &snb_uncore_msr_ops,
         .format_group   = &snb_uncore_format_group,
+        .event_descs    = snb_uncore_events,
 };
 
 static struct intel_uncore_type *snb_msr_uncores[] = {
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 4873e62db6a1..9e5bcf1e2376 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -225,6 +225,9 @@ static ssize_t microcode_write(struct file *file, const char __user *buf,
         if (do_microcode_update(buf, len) == 0)
                 ret = (ssize_t)len;
 
+        if (ret > 0)
+                perf_check_microcode();
+
         mutex_unlock(&microcode_mutex);
         put_online_cpus();
 
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index e498b18f010c..9fc9aa7ac703 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -318,7 +318,7 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
                 if (val & 0x10) {
                         u8 edge_irr = s->irr & ~s->elcr;
                         int i;
-                        bool found;
+                        bool found = false;
                         struct kvm_vcpu *vcpu;
 
                         s->init4 = val & 1;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c00f03de1b79..b1eb202ee76a 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3619,6 +3619,7 @@ static void seg_setup(int seg)
 
 static int alloc_apic_access_page(struct kvm *kvm)
 {
+        struct page *page;
         struct kvm_userspace_memory_region kvm_userspace_mem;
         int r = 0;
 
@@ -3633,7 +3634,13 @@ static int alloc_apic_access_page(struct kvm *kvm)
         if (r)
                 goto out;
 
-        kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
+        page = gfn_to_page(kvm, 0xfee00);
+        if (is_error_page(page)) {
+                r = -EFAULT;
+                goto out;
+        }
+
+        kvm->arch.apic_access_page = page;
 out:
         mutex_unlock(&kvm->slots_lock);
         return r;
@@ -3641,6 +3648,7 @@ out:
 
 static int alloc_identity_pagetable(struct kvm *kvm)
 {
+        struct page *page;
         struct kvm_userspace_memory_region kvm_userspace_mem;
         int r = 0;
 
@@ -3656,8 +3664,13 @@ static int alloc_identity_pagetable(struct kvm *kvm)
         if (r)
                 goto out;
 
-        kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
-                        kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
+        page = gfn_to_page(kvm, kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
+        if (is_error_page(page)) {
+                r = -EFAULT;
+                goto out;
+        }
+
+        kvm->arch.ept_identity_pagetable = page;
 out:
         mutex_unlock(&kvm->slots_lock);
         return r;
@@ -6575,7 +6588,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
         /* Exposing INVPCID only when PCID is exposed */
         best = kvm_find_cpuid_entry(vcpu, 0x7, 0);
         if (vmx_invpcid_supported() &&
-            best && (best->ecx & bit(X86_FEATURE_INVPCID)) &&
+            best && (best->ebx & bit(X86_FEATURE_INVPCID)) &&
             guest_cpuid_has_pcid(vcpu)) {
                 exec_control |= SECONDARY_EXEC_ENABLE_INVPCID;
                 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
@@ -6585,7 +6598,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
                 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
                              exec_control);
                 if (best)
-                        best->ecx &= ~bit(X86_FEATURE_INVPCID);
+                        best->ebx &= ~bit(X86_FEATURE_INVPCID);
         }
 }
 
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 148ed666e311..2966c847d489 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5113,17 +5113,20 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu)
                         !kvm_event_needs_reinjection(vcpu);
 }
 
-static void vapic_enter(struct kvm_vcpu *vcpu)
+static int vapic_enter(struct kvm_vcpu *vcpu)
 {
         struct kvm_lapic *apic = vcpu->arch.apic;
         struct page *page;
 
         if (!apic || !apic->vapic_addr)
-                return;
+                return 0;
 
         page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
+        if (is_error_page(page))
+                return -EFAULT;
 
         vcpu->arch.apic->vapic_page = page;
+        return 0;
 }
 
 static void vapic_exit(struct kvm_vcpu *vcpu)
@@ -5430,7 +5433,11 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
         }
 
         vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
-        vapic_enter(vcpu);
+        r = vapic_enter(vcpu);
+        if (r) {
+                srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+                return r;
+        }
 
         r = 1;
         while (r > 0) {
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index e0e6990723e9..ab1f6a93b527 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -319,7 +319,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
  */
 int devmem_is_allowed(unsigned long pagenr)
 {
-        if (pagenr <= 256)
+        if (pagenr < 256)
                 return 1;
         if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
                 return 0;
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 9642d4a38602..1fbe75a95f15 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1452,6 +1452,10 @@ asmlinkage void __init xen_start_kernel(void)
                 pci_request_acs();
 
                 xen_acpi_sleep_register();
+
+                /* Avoid searching for BIOS MP tables */
+                x86_init.mpparse.find_smp_config = x86_init_noop;
+                x86_init.mpparse.get_smp_config = x86_init_uint_noop;
         }
 #ifdef CONFIG_PCI
         /* PCI BIOS service won't work from a PV guest. */
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 76ba0e97e530..72213da605f5 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -828,9 +828,6 @@ int m2p_add_override(unsigned long mfn, struct page *page,
 
                         xen_mc_issue(PARAVIRT_LAZY_MMU);
                 }
-                /* let's use dev_bus_addr to record the old mfn instead */
-                kmap_op->dev_bus_addr = page->index;
-                page->index = (unsigned long) kmap_op;
         }
         spin_lock_irqsave(&m2p_override_lock, flags);
         list_add(&page->lru,  &m2p_overrides[mfn_hash(mfn)]);
@@ -857,7 +854,8 @@ int m2p_add_override(unsigned long mfn, struct page *page,
         return 0;
 }
 EXPORT_SYMBOL_GPL(m2p_add_override);
-int m2p_remove_override(struct page *page, bool clear_pte)
+int m2p_remove_override(struct page *page,
+                struct gnttab_map_grant_ref *kmap_op)
 {
         unsigned long flags;
         unsigned long mfn;
@@ -887,10 +885,8 @@ int m2p_remove_override(struct page *page, bool clear_pte)
         WARN_ON(!PagePrivate(page));
         ClearPagePrivate(page);
 
-        if (clear_pte) {
-                struct gnttab_map_grant_ref *map_op =
-                        (struct gnttab_map_grant_ref *) page->index;
-                set_phys_to_machine(pfn, map_op->dev_bus_addr);
+        set_phys_to_machine(pfn, page->index);
+        if (kmap_op != NULL) {
                 if (!PageHighMem(page)) {
                         struct multicall_space mcs;
                         struct gnttab_unmap_grant_ref *unmap_op;
@@ -902,13 +898,13 @@ int m2p_remove_override(struct page *page, bool clear_pte)
                          * issued. In this case handle is going to -1 because
                          * it hasn't been modified yet.
                          */
-                        if (map_op->handle == -1)
+                        if (kmap_op->handle == -1)
                                 xen_mc_flush();
                         /*
-                         * Now if map_op->handle is negative it means that the
+                         * Now if kmap_op->handle is negative it means that the
                          * hypercall actually returned an error.
                          */
-                        if (map_op->handle == GNTST_general_error) {
+                        if (kmap_op->handle == GNTST_general_error) {
                                 printk(KERN_WARNING "m2p_remove_override: "
                                                 "pfn %lx mfn %lx, failed to modify kernel mappings",
                                                 pfn, mfn);
@@ -918,8 +914,8 @@ int m2p_remove_override(struct page *page, bool clear_pte)
                         mcs = xen_mc_entry(
                                         sizeof(struct gnttab_unmap_grant_ref));
                         unmap_op = mcs.args;
-                        unmap_op->host_addr = map_op->host_addr;
-                        unmap_op->handle = map_op->handle;
+                        unmap_op->host_addr = kmap_op->host_addr;
+                        unmap_op->handle = kmap_op->handle;
                         unmap_op->dev_bus_addr = 0;
 
                         MULTI_grant_table_op(mcs.mc,
@@ -930,10 +926,9 @@ int m2p_remove_override(struct page *page, bool clear_pte)
                         set_pte_at(&init_mm, address, ptep,
                                         pfn_pte(pfn, PAGE_KERNEL));
                         __flush_tlb_single(address);
-                        map_op->host_addr = 0;
+                        kmap_op->host_addr = 0;
                 }
-        } else
-                set_phys_to_machine(pfn, page->index);
+        }
 
         /* p2m(m2p(mfn)) == FOREIGN_FRAME(mfn): the mfn is already present
          * somewhere in this domain, even before being added to the