sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg/DxeMpLib: Make sure APs in safe loop code

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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: