diff options
Diffstat (limited to 'UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c')
| -rw-r--r-- | UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c index 47116355a8..1beaebe69c 100644 --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c @@ -67,6 +67,14 @@ C1eInitialize ( IN BOOLEAN State
)
{
+ //
+ // The scope of C1EEnable bit in the MSR_NEHALEM_POWER_CTL is Package, only program
+ // MSR_FEATURE_CONFIG for thread 0 core 0 in each package.
+ //
+ if ((CpuInfo->ProcessorInfo.Location.Thread != 0) || (CpuInfo->ProcessorInfo.Location.Core != 0)) {
+ return RETURN_SUCCESS;
+ }
+
CPU_REGISTER_TABLE_WRITE_FIELD (
ProcessorNumber,
Msr,
|