diff options
Diffstat (limited to 'UefiCpuPkg/Library/MpInitLib/MpLib.c')
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/MpLib.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c index 9a6ec5db5c..f29e66a14f 100644 --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c @@ -910,9 +910,16 @@ DxeApEntryPoint ( CPU_MP_DATA *CpuMpData
)
{
- UINTN ProcessorNumber;
+ UINTN ProcessorNumber;
+ MSR_IA32_EFER_REGISTER EferMsr;
GetProcessorNumber (CpuMpData, &ProcessorNumber);
+ if (CpuMpData->EnableExecuteDisableForSwitchContext) {
+ EferMsr.Uint64 = AsmReadMsr64 (MSR_IA32_EFER);
+ EferMsr.Bits.NXE = 1;
+ AsmWriteMsr64 (MSR_IA32_EFER, EferMsr.Uint64);
+ }
+
RestoreVolatileRegisters (&CpuMpData->CpuData[0].VolatileRegisters, FALSE);
InterlockedIncrement ((UINT32 *)&CpuMpData->FinishedCount);
PlaceAPInMwaitLoopOrRunLoop (
@@ -2188,8 +2195,9 @@ MpInitLibInitialize ( if (MpHandOff->WaitLoopExecutionMode == sizeof (VOID *)) {
ASSERT (CpuMpData->ApLoopMode != ApInHltLoop);
- CpuMpData->FinishedCount = 0;
- CpuMpData->InitFlag = ApInitDone;
+ CpuMpData->FinishedCount = 0;
+ CpuMpData->InitFlag = ApInitDone;
+ CpuMpData->EnableExecuteDisableForSwitchContext = IsBspExecuteDisableEnabled ();
SaveCpuMpData (CpuMpData);
//
// In scenarios where both the PEI and DXE phases run in the same
|