Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <[email protected]>
---
UefiCpuPkg/CpuDxe/CpuMp.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c
index 453dc47..e328de7 100644
--- a/UefiCpuPkg/CpuDxe/CpuMp.c
+++ b/UefiCpuPkg/CpuDxe/CpuMp.c
@@ -155,6 +155,11 @@ SetApProcedure (
CpuData->Parameter = ProcedureArgument;
CpuData->Procedure = Procedure;
ReleaseMpSpinLock (CpuData);
+
+ //
+ // Wake up a hlt AP processor.
+ //
+ SendNmiIpi(CpuData->Info.ProcessorId);
}
/**
@@ -1197,6 +1202,11 @@ ProcessorToIdleState (
CpuData->Procedure = NULL;
CpuData->State = CpuStateFinished;
ReleaseMpSpinLock (CpuData);
+ } else {
+ //
+ // Waiting for a NMI interrupt to wake up.
+ //
+ CpuSleep ();
}
CpuPause ();
--
1.9.3
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