From 9c6961d5987c1cabe4d7136fe506f00ce1c501c8 Mon Sep 17 00:00:00 2001
From: Ruiyu Ni <ruiyu.ni@intel.com>
Date: Wed, 17 Jan 2018 13:52:06 +0800
Subject: [PATCH] UefiCpuPkg/MpInitLib: Fix timer interrupt is disabled after
 SwitchBSP

Commits a2ea6894e6ca95e8d7a254593661a79e4b988626
* UefiCpuPkg/MpInitLib: Fix a bug that AP enters timer INT handler
masked the interrupts in AP.
But it didn't unmask the interrupt in new BSP when Switch BSP
happens.
The patch fixed this issue.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jeff Fan <vanjeff_919@hotmail.com>
Cc: Eric Dong <eric.dong@intel.com>
---
 UefiCpuPkg/Library/MpInitLib/MpLib.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index cdc03113e5..8ec016e928 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1771,6 +1771,7 @@ SwitchBSPWorker (
   ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);
   ApicBaseMsr.Bits.BSP = 1;
   AsmWriteMsr64 (MSR_IA32_APIC_BASE, ApicBaseMsr.Uint64);
+  ProgramVirtualWireMode ();
 
   //
   // Wait for old BSP finished AP task
-- 
2.39.2