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UefiCpuPkg/DxeMpLib: Make sure APs in safe loop code 

Add one semaphore to make sure BSP to wait till all APs run in AP safe loop
code.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Jeff Fan 2016-11-25 13:18:57 +08:00
parent bf2786dc79
commit 9f91cb01c4
4 changed files with 15 additions and 4 deletions
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8
UefiCpuPkg/Library/MpInitLib/DxeMpLib.c
View File

@ -27,6 +27,7 @@ EFI_EVENT mLegacyBootEvent = NULL;
volatile BOOLEAN mStopCheckAllApsStatus = TRUE;
VOID *mReservedApLoopFunc = NULL;
UINTN mReservedTopOfApStack;
volatile UINT32 mNumberToFinish = 0;
/**
Get the pointer to CPU MP Data structure.
@ -253,7 +254,8 @@ RelocateApLoop (
MwaitSupport,
CpuMpData->ApTargetCState,
CpuMpData->PmCodeSegment,
mReservedTopOfApStack - ProcessorNumber * AP_SAFE_STACK_SIZE
mReservedTopOfApStack - ProcessorNumber * AP_SAFE_STACK_SIZE,
(UINTN) &mNumberToFinish
);
//
// It should never reach here
@ -282,7 +284,11 @@ MpInitChangeApLoopCallback (
CpuMpData->SaveRestoreFlag = TRUE;
CpuMpData->PmCodeSegment = GetProtectedModeCS ();
CpuMpData->ApLoopMode = PcdGet8 (PcdCpuApLoopMode);
mNumberToFinish = CpuMpData->CpuCount - 1;
WakeUpAP (CpuMpData, TRUE, 0, RelocateApLoop, NULL);
while (mNumberToFinish > 0) {
CpuPause ();
}
DEBUG ((DEBUG_INFO, "%a() done!\n", __FUNCTION__));
}

4
UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm
View File

@ -215,7 +215,7 @@ CProcedureInvoke:
RendezvousFunnelProcEnd:
;-------------------------------------------------------------------------------------
; AsmRelocateApLoop (MwaitSupport, ApTargetCState, PmCodeSegment, TopOfApStack);
; AsmRelocateApLoop (MwaitSupport, ApTargetCState, PmCodeSegment, TopOfApStack, CountTofinish);
;-------------------------------------------------------------------------------------
global ASM_PFX(AsmRelocateApLoop)
ASM_PFX(AsmRelocateApLoop):
@ -227,6 +227,8 @@ AsmRelocateApLoopStart:
mov ebp, esp
mov ebx, [eax + 8] ; ApTargetCState
mov ecx, [eax + 4] ; MwaitSupport
mov eax, [eax + 20] ; CountTofinish
lock dec dword [eax] ; (*CountTofinish)--
cmp cl, 1 ; Check mwait-monitor support
jnz HltLoop
MwaitLoop:

3
UefiCpuPkg/Library/MpInitLib/MpLib.h
View File

@ -251,7 +251,8 @@ VOID
IN BOOLEAN MwaitSupport,
IN UINTN ApTargetCState,
IN UINTN PmCodeSegment,
IN UINTN TopOfApStack
IN UINTN TopOfApStack,
IN UINTN NumberToFinish
);
/**

4
UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
View File

@ -222,11 +222,13 @@ CProcedureInvoke:
RendezvousFunnelProcEnd:
;-------------------------------------------------------------------------------------
; AsmRelocateApLoop (MwaitSupport, ApTargetCState, PmCodeSegment, TopOfApStack);
; AsmRelocateApLoop (MwaitSupport, ApTargetCState, PmCodeSegment, TopOfApStack, CountTofinish);
;-------------------------------------------------------------------------------------
global ASM_PFX(AsmRelocateApLoop)
ASM_PFX(AsmRelocateApLoop):
AsmRelocateApLoopStart:
mov rax, [rsp + 40] ; CountTofinish
lock dec dword [rax] ; (*CountTofinish)--
mov rsp, r9
push rcx
push rdx