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UefiCpuPkg/MpInitLib: save/restore original contents 

If APs is in HLT-LOOP mode, we need AP reset vector for waking up APs. This
updating is to save/restore original contents of AP reset vector around waking
up APs always.

https://bugzilla.tianocore.org/show_bug.cgi?id=500

Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Jeff Fan 2017-04-19 11:16:55 +08:00
parent d7dd4f0a06
commit 9293d6e42e
1 changed files with 4 additions and 12 deletions
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16
UefiCpuPkg/Library/MpInitLib/PeiMpLib.c
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@ -1,7 +1,7 @@
/** @file
MP initialize support functions for PEI phase.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -129,10 +129,8 @@ CpuMpEndOfPeiCallback (
}
Hob.Raw = GET_NEXT_HOB (Hob);
}
} else {
CpuMpData->SaveRestoreFlag = TRUE;
RestoreWakeupBuffer (CpuMpData);
}
return EFI_SUCCESS;
}
@ -286,12 +284,8 @@ AllocateResetVector (
CpuMpData->WakeupBuffer = GetWakeupBuffer (ApResetVectorSize);
CpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN)
(CpuMpData->WakeupBuffer + CpuMpData->AddressMap.RendezvousFunnelSize);
BackupAndPrepareWakeupBuffer (CpuMpData);
}
if (CpuMpData->SaveRestoreFlag) {
BackupAndPrepareWakeupBuffer (CpuMpData);
}
BackupAndPrepareWakeupBuffer (CpuMpData);
}
/**
@ -304,9 +298,7 @@ FreeResetVector (
IN CPU_MP_DATA *CpuMpData
)
{
if (CpuMpData->SaveRestoreFlag) {
RestoreWakeupBuffer (CpuMpData);
}
RestoreWakeupBuffer (CpuMpData);
}
/**