diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/kvm_para.h | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce.c | 14 | ||||
| -rw-r--r-- | arch/x86/kernel/microcode_intel.c | 14 |
4 files changed, 23 insertions, 10 deletions
diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h index 734c3767cfa..183922e13de 100644 --- a/arch/x86/include/asm/kvm_para.h +++ b/arch/x86/include/asm/kvm_para.h @@ -170,6 +170,9 @@ static inline int kvm_para_available(void) unsigned int eax, ebx, ecx, edx; char signature[13]; + if (boot_cpu_data.cpuid_level < 0) + return 0; /* So we don't blow up on old processors */ + cpuid(KVM_CPUID_SIGNATURE, &eax, &ebx, &ecx, &edx); memcpy(signature + 0, &ebx, 4); memcpy(signature + 4, &ecx, 4); diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index a415b1f4436..7c439fe4941 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -593,7 +593,7 @@ void __init acpi_set_irq_model_ioapic(void) #ifdef CONFIG_ACPI_HOTPLUG_CPU #include <acpi/processor.h> -static void __cpuinitdata acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) +static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) { #ifdef CONFIG_ACPI_NUMA int nid; diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index d086a09c087..11c9166c333 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -945,9 +945,10 @@ struct mce_info { atomic_t inuse; struct task_struct *t; __u64 paddr; + int restartable; } mce_info[MCE_INFO_MAX]; -static void mce_save_info(__u64 addr) +static void mce_save_info(__u64 addr, int c) { struct mce_info *mi; @@ -955,6 +956,7 @@ static void mce_save_info(__u64 addr) if (atomic_cmpxchg(&mi->inuse, 0, 1) == 0) { mi->t = current; mi->paddr = addr; + mi->restartable = c; return; } } @@ -1130,7 +1132,7 @@ void do_machine_check(struct pt_regs *regs, long error_code) mce_panic("Fatal machine check on current CPU", &m, msg); if (worst == MCE_AR_SEVERITY) { /* schedule action before return to userland */ - mce_save_info(m.addr); + mce_save_info(m.addr, m.mcgstatus & MCG_STATUS_RIPV); set_thread_flag(TIF_MCE_NOTIFY); } else if (kill_it) { force_sig(SIGBUS, current); @@ -1179,7 +1181,13 @@ void mce_notify_process(void) pr_err("Uncorrected hardware memory error in user-access at %llx", mi->paddr); - if (memory_failure(pfn, MCE_VECTOR, MF_ACTION_REQUIRED) < 0) { + /* + * We must call memory_failure() here even if the current process is + * doomed. We still need to mark the page as poisoned and alert any + * other users of the page. + */ + if (memory_failure(pfn, MCE_VECTOR, MF_ACTION_REQUIRED) < 0 || + mi->restartable == 0) { pr_err("Memory error not recovered"); force_sig(SIGBUS, current); } diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c index 3ca42d0e43a..0327e2b3c40 100644 --- a/arch/x86/kernel/microcode_intel.c +++ b/arch/x86/kernel/microcode_intel.c @@ -147,12 +147,6 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig) memset(csig, 0, sizeof(*csig)); - if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 || - cpu_has(c, X86_FEATURE_IA64)) { - pr_err("CPU%d not a capable Intel processor\n", cpu_num); - return -1; - } - csig->sig = cpuid_eax(0x00000001); if ((c->x86_model >= 5) || (c->x86 > 6)) { @@ -463,6 +457,14 @@ static struct microcode_ops microcode_intel_ops = { struct microcode_ops * __init init_intel_microcode(void) { + struct cpuinfo_x86 *c = &cpu_data(0); + + if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 || + cpu_has(c, X86_FEATURE_IA64)) { + pr_err("Intel CPU family 0x%x not supported\n", c->x86); + return NULL; + } + return µcode_intel_ops; } |