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x86, cpu: Convert AMD Erratum 383 

Convert the AMD erratum 383 testing code to the bug infrastructure. This
allows keeping the AMD-specific erratum testing machinery private to
amd.c and not export symbols to modules needlessly.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1363788448-31325-6-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Borislav Petkov 2013-03-20 15:07:27 +01:00 committed by H. Peter Anvin
parent c5b41a6750
commit e6ee94d58d
4 changed files with 8 additions and 4 deletions
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1
arch/x86/include/asm/cpufeature.h
View File

@ -225,6 +225,7 @@
#define X86_BUG_F00F X86_BUG(0) /* Intel F00F */
#define X86_BUG_FDIV X86_BUG(1) /* FPU FDIV */
#define X86_BUG_COMA X86_BUG(2) /* Cyrix 6x86 coma */
#define X86_BUG_AMD_TLB_MMATCH X86_BUG(3) /* AMD Erratum 383 */
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)

1
arch/x86/include/asm/processor.h
View File

@ -974,7 +974,6 @@ unsigned long calc_aperfmperf_ratio(struct aperfmperf *old,
* AMD errata checking
*/
#ifdef CONFIG_CPU_SUP_AMD
extern const int amd_erratum_383[];
extern const int amd_erratum_400[];
extern bool cpu_has_amd_erratum(const int *);

8
arch/x86/kernel/cpu/amd.c
View File

@ -513,6 +513,8 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
#endif
}
static const int amd_erratum_383[];
static void __cpuinit init_amd(struct cpuinfo_x86 *c)
{
u32 dummy;
@ -727,6 +729,9 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
rdmsrl_safe(MSR_AMD64_BU_CFG2, &value);
value &= ~(1ULL << 24);
wrmsrl_safe(MSR_AMD64_BU_CFG2, value);
if (cpu_has_amd_erratum(amd_erratum_383))
set_cpu_bug(c, X86_BUG_AMD_TLB_MMATCH);
}
rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
@ -863,9 +868,8 @@ const int amd_erratum_400[] =
AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf));
EXPORT_SYMBOL_GPL(amd_erratum_400);
const int amd_erratum_383[] =
static const int amd_erratum_383[] =
AMD_OSVW_ERRATUM(3, AMD_MODEL_RANGE(0x10, 0, 0, 0xff, 0xf));
EXPORT_SYMBOL_GPL(amd_erratum_383);
bool cpu_has_amd_erratum(const int *erratum)
{

2
arch/x86/kvm/svm.c
View File

@ -555,7 +555,7 @@ static void svm_init_erratum_383(void)
int err;
u64 val;
if (!cpu_has_amd_erratum(amd_erratum_383))
if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
return;
/* Use _safe variants to not break nested virtualization */