This issue is introduced by a patch at
f32bfe6d061420a15bac6083063d227c567e6388
The above patch miss the case of 64-bit PEI, which will link
X64/MpFuncs.nasm instead of Ia32/MpFuncs.nasm. For X64/MpFuncs.nasm,
ExchangeInfo->ModeHighMemory should be always initialized no matter
if separate wakeup buffer is allocated or not. Ia32/MpFuncs.nasm will
not need ModeHighMemory during AP init. So the changes made in this
patch should not affect the functionality of it.
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
---
UefiCpuPkg/Library/MpInitLib/MpLib.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 42011d6231..7c4b9deaee 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -834,14 +834,15 @@ FillExchangeInfoData (
);
ExchangeInfo->ModeTransitionMemory = (UINT32)CpuMpData->WakeupBufferHigh;
- ExchangeInfo->ModeHighMemory = (UINT32)CpuMpData->WakeupBufferHigh +
- (UINT32)ExchangeInfo->ModeOffset -
- (UINT32)CpuMpData->AddressMap.ModeTransitionOffset;
- ExchangeInfo->ModeHighSegment = (UINT16)ExchangeInfo->CodeSegment;
} else {
ExchangeInfo->ModeTransitionMemory = (UINT32)
(ExchangeInfo->BufferStart + CpuMpData->AddressMap.ModeTransitionOffset);
}
+
+ ExchangeInfo->ModeHighMemory = ExchangeInfo->ModeTransitionMemory +
+ (UINT32)ExchangeInfo->ModeOffset -
+ (UINT32)CpuMpData->AddressMap.ModeTransitionOffset;
+ ExchangeInfo->ModeHighSegment = (UINT16)ExchangeInfo->CodeSegment;
}
/**
@@ -918,9 +919,9 @@ AllocateResetVector (
CpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN)
(CpuMpData->WakeupBuffer + CpuMpData->AddressMap.RendezvousFunnelSize);
CpuMpData->WakeupBufferHigh = GetModeTransitionBuffer (
- CpuMpData->AddressMap.RendezvousFunnelSize -
- CpuMpData->AddressMap.ModeTransitionOffset
- );
+ CpuMpData->AddressMap.RendezvousFunnelSize -
+ CpuMpData->AddressMap.ModeTransitionOffset
+ );
}
BackupAndPrepareWakeupBuffer (CpuMpData);
}
--
2.15.1.windows.2
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