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x86, cpu: Use AMD errata checking framework for erratum 383

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Use the AMD errata checking framework instead of open-coding the test.

Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
LKML-Reference: <1280336972-865982-3-git-send-email-hans.rosenfeld@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Hans Rosenfeld 2010-07-28 19:09:32 +02:00 committed by H. Peter Anvin
parent 9d8888c2a2
commit 1be85a6d93
3 changed files with 4 additions and 2 deletions
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1
arch/x86/include/asm/processor.h
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@ -1029,6 +1029,7 @@ 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 *);

2
arch/x86/kernel/cpu/amd.c
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@ -632,6 +632,8 @@ const int amd_erratum_400[] =
AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0xf, 0x41, 0x2, 0xff, 0xf),
AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf));
const int amd_erratum_383[] =
AMD_OSVW_ERRATUM(3, AMD_MODEL_RANGE(0x10, 0, 0, 0xff, 0xf));
bool cpu_has_amd_erratum(const int *erratum)
{

3
arch/x86/kvm/svm.c
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@ -383,8 +383,7 @@ static void svm_init_erratum_383(void)
int err;
u64 val;
/* Only Fam10h is affected */
if (boot_cpu_data.x86 != 0x10)
if (!cpu_has_amd_erratum(amd_erratum_383))
return;
/* Use _safe variants to not break nested virtualization */