From: Jeff Fan <jeff.fan@intel.com>
Date: Wed, 2 Dec 2015 00:43:19 +0000 (+0000)
Subject: UefiCpuPkg/CpuMpPei: Sync BSP's CRx to APs when initialization
X-Git-Tag: edk2-stable201903~8402
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=22cfe73a12ce0dc272d790999dcb5c3d94bc1fc6

UefiCpuPkg/CpuMpPei: Sync BSP's CRx to APs when initialization

Save BSP's volatile register and sync CRx register to APs when AP 1st wake up.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@Intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19088 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.c b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
index d058d143ce..53af9489b2 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));
 
   //