diff options
Diffstat (limited to 'UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c')
| -rw-r--r-- | UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c index 2038171a14..f30117d2c5 100644 --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c @@ -69,6 +69,18 @@ EistInitialize ( IN BOOLEAN State
)
{
+ //
+ // The scope of the MSR_IA32_MISC_ENABLE is core for below processor type, only program
+ // MSR_IA32_MISC_ENABLE for thread 0 in each core.
+ //
+ if (IS_ATOM_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
+ IS_CORE_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
+ IS_CORE2_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
+ if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
+ return RETURN_SUCCESS;
+ }
+ }
+
CPU_REGISTER_TABLE_WRITE_FIELD (
ProcessorNumber,
Msr,
|