Add CPUID check to see if the CPU supports the Machine Check Architecture before accessing the Machine Check Architecture related MSRs.
Cc: Michael Kinney <[email protected]> Cc: Ruiyu Ni <[email protected]> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Eric Dong <[email protected]> --- UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c index 65e5cd3..bf7e26b 100644 --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c @@ -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))); -- 2.7.0.windows.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
