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UefiCpuPkg/CpuCommonFeaturesLib: Add CPUID MCA support check 

Add CPUID check to see if the CPU supports the Machine Check
Architecture before accessing the Machine Check Architecture
related MSRs.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
This commit is contained in:
Eric Dong 2017-08-17 11:33:30 +08:00
parent ef5e0db22c
commit ac40197558
1 changed files with 4 additions and 0 deletions
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4
UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c
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@ -41,6 +41,10 @@ LmceSupport (
{
MSR_IA32_MCG_CAP_REGISTER McgCap;
if (!McaSupport (ProcessorNumber, CpuInfo, ConfigData)) {
return FALSE;
}
McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP);
if (ProcessorNumber == 0) {
DEBUG ((EFI_D_INFO, "LMCE eanble = %x\n", (BOOLEAN) (McgCap.Bits.MCG_LMCE_P != 0)));