From: Jeff Fan <jeff.fan@intel.com>
Date: Mon, 11 Jul 2016 11:46:36 +0000 (+0800)
Subject: UefiCpuPkg/CpuMpPei: Do not load new GDT table
X-Git-Tag: edk2-stable201903~6316
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=9c3d2f9a2985d97961b07ddc493b6e406ace8814

UefiCpuPkg/CpuMpPei: Do not load new GDT table

Do not load the new GDT table and just to use the exiting BSP's GDT table set up
by SEC phase.

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

diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.c b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
index 9b602a1906..5a1a64888c 100644
--- a/UefiCpuPkg/CpuMpPei/CpuMpPei.c
+++ b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
@@ -464,7 +464,7 @@ WakeUpAP (
   //
   // Get the BSP's data of GDT and IDT
   //
-  CopyMem ((VOID *)&ExchangeInfo->GdtrProfile, &mGdt, sizeof(mGdt));
+  AsmReadGdtr ((IA32_DESCRIPTOR *) &ExchangeInfo->GdtrProfile);
   AsmReadIdtr ((IA32_DESCRIPTOR *) &ExchangeInfo->IdtrProfile);
 
   if (PeiCpuMpData->ApLoopMode == ApInMwaitLoop) {
@@ -859,10 +859,6 @@ CpuMpPeimInit (
   EFI_VECTOR_HANDOFF_INFO         *VectorInfo;
   EFI_PEI_VECTOR_HANDOFF_INFO_PPI *VectorHandoffInfoPpi;
 
-  //
-  // Load new GDT table on BSP
-  //
-  AsmInitializeGdt (&mGdt);
   //
   // Get Vector Hand-off Info PPI
   //