When BSP switched, we need to update some AP information. For example,
ApStartupSignalBuffer and ApTopOfStack.
Cc: Feng Tian <feng.t...@intel.com>
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff....@intel.com>
---
UefiCpuPkg/Library/MpInitLib/MpLib.c | 3 +++
UefiCpuPkg/Library/MpInitLib/MpLib.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c
b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 748c8e7..c74efb0 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -549,6 +549,8 @@ ApWakeupFunction (
GetProcessorNumber (CpuMpData, &ProcessorNumber);
CpuMpData->CpuData[ProcessorNumber].ApFunction = 0;
CpuMpData->CpuData[ProcessorNumber].ApFunctionArgument = 0;
+ ApStartupSignalBuffer =
CpuMpData->CpuData[ProcessorNumber].StartupApSignal;
+ CpuInfoInHob[ProcessorNumber].ApTopOfStack =
CpuInfoInHob[CpuMpData->NewBspNumber].ApTopOfStack;
} else {
//
// Re-get the CPU APICID and Initial APICID
@@ -1421,6 +1423,7 @@ SwitchBSPWorker (
CpuMpData->BSPInfo.State = CPU_SWITCH_STATE_IDLE;
CpuMpData->APInfo.State = CPU_SWITCH_STATE_IDLE;
CpuMpData->SwitchBspFlag = TRUE;
+ CpuMpData->NewBspNumber = ProcessorNumber;
//
// Clear the BSP bit of MSR_IA32_APIC_BASE
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h
b/UefiCpuPkg/Library/MpInitLib/MpLib.h
index f81c819..0ac777a 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
@@ -216,6 +216,7 @@ struct _CPU_MP_DATA {
AP_INIT_STATE InitFlag;
BOOLEAN X2ApicEnable;
BOOLEAN SwitchBspFlag;
+ UINTN NewBspNumber;
CPU_EXCHANGE_ROLE_INFO BSPInfo;
CPU_EXCHANGE_ROLE_INFO APInfo;
MTRR_SETTINGS MtrrTable;
--
2.9.3.windows.2
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