Save BSP's volatile register and sync CRx register to APs when AP 1st wake up.
Cc: Feng Tian <feng.t...@intel.com>
Cc: Michael Kinney <michael.d.kin...@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff....@intel.com>
---
UefiCpuPkg/CpuMpPei/CpuMpPei.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.c b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
index d058d14..53af948 100644
--- a/UefiCpuPkg/CpuMpPei/CpuMpPei.c
+++ b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
@@ -230,6 +230,10 @@ ApCFunction (
if (PeiCpuMpData->InitFlag) {
ProcessorNumber = NumApsExecuting;
//
+ // Sync BSP's Control registers to APs
+ //
+ RestoreVolatileRegisters (&PeiCpuMpData->CpuData[0].VolatileRegisters,
FALSE);
+ //
// This is first time AP wakeup, get BIST information from AP stack
//
BistData = *(UINTN *) (PeiCpuMpData->Buffer + ProcessorNumber *
PeiCpuMpData->CpuApStackSize - sizeof (UINTN));
@@ -560,6 +564,7 @@ PrepareAPStartupVector (
PeiCpuMpData->CpuData[0].Health.Uint32 = 0;
PeiCpuMpData->EndOfPeiFlag = FALSE;
InitializeSpinLock(&PeiCpuMpData->MpLock);
+ SaveVolatileRegisters (&PeiCpuMpData->CpuData[0].VolatileRegisters);
CopyMem (&PeiCpuMpData->AddressMap, &AddressMap, sizeof
(MP_ASSEMBLY_ADDRESS_MAP));
//
--
1.9.5.msysgit.0
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