UefiCpuPkg/MpInitLib: Fix timer interrupt is disabled after SwitchBSP

[edk2] [PATCH] UefiCpuPkg/MpInitLib: Fix timer interrupt is disabled after SwitchBSP

Posted by Ruiyu Ni 6 years, 11 months ago

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>
Cc: 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
-- 
2.15.1.windows.2

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Re: [edk2] [PATCH] UefiCpuPkg/MpInitLib: Fix timer interrupt is disabled after SwitchBSP

Posted by Dong, Eric 6 years, 11 months ago

Reviewed-by: Eric Dong <eric.dong@intel.com>

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Ruiyu Ni
Sent: Wednesday, January 17, 2018 1:52 PM
To: edk2-devel@lists.01.org
Cc: Dong, Eric <eric.dong@intel.com>
Subject: [edk2] [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>
Cc: 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
--
2.15.1.windows.2

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