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UefiCpuPkg/MpInitLib: Fix timer interrupt is disabled after SwitchBSP

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Commits a2ea6894e6
* 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>
This commit is contained in:
Ruiyu Ni
2018-01-17 13:52:06 +08:00
parent b2725f57c7
commit 9c6961d598
1 changed files with 1 additions and 0 deletions
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UefiCpuPkg/Library/MpInitLib/MpLib.c
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@@ -1771,6 +1771,7 @@ SwitchBSPWorker (
ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE); ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);
ApicBaseMsr.Bits.BSP = 1; ApicBaseMsr.Bits.BSP = 1;
AsmWriteMsr64 (MSR_IA32_APIC_BASE, ApicBaseMsr.Uint64); AsmWriteMsr64 (MSR_IA32_APIC_BASE, ApicBaseMsr.Uint64);
ProgramVirtualWireMode ();
// //
// Wait for old BSP finished AP task // Wait for old BSP finished AP task