X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=UefiCpuPkg%2FLibrary%2FCpuCommonFeaturesLib%2FExecuteDisable.c;h=ff06cb9b6099d3174060e3e2811a6a7331d5fa97;hp=921656a1e86989e27117e3db01c7a49c18138cd2;hb=d28daaddb3e732468e930a809d3d3943a5de9558;hpb=38381e18bf08dadad91627949996d106612f4753

diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c
index 921656a1e8..ff06cb9b60 100644
--- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c
+++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c
@@ -79,6 +79,16 @@ ExecuteDisableInitialize (
   IN BOOLEAN                           State
   )
 {
+  //
+  // The scope of the MSR_IA32_EFER is core for below processor type, only program
+  // MSR_IA32_EFER for thread 0 in each core.
+  //
+  if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
+    if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
+      return RETURN_SUCCESS;
+    }
+  }
+
   CPU_REGISTER_TABLE_WRITE_FIELD (
     ProcessorNumber,
     Msr,