UefiCpuPkg: Extend SMM CPU Service with rendezvous support.
REF? https://bugzilla.tianocore.org/show_bug.cgi?id=3815 This patch define a new Protocol with the new services SmmWaitForAllProcessor(), which can be used by SMI handler to optionally wait for other APs to complete SMM rendezvous in relaxed AP mode. A new library SmmCpuRendezvousLib is provided to abstract the service into library API to simple SMI handler code. Cc: Eric Dong <eric.dong@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Cc: Rahul Kumar <rahul1.kumar@intel.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Cc: Zhihao Li <zhihao.li@intel.com> Signed-off-by: Zhihao Li <zhihao.li@intel.com>
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@@ -1,7 +1,7 @@
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/** @file
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SMM MP service implementation
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Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2009 - 2022, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@@ -293,10 +293,14 @@ SmmWaitForApArrival (
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// Sync with APs 1st timeout
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//
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for (Timer = StartSyncTimer ();
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!IsSyncTimerTimeout (Timer) && !(LmceEn && LmceSignal) &&
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!AllCpusInSmmWithExceptions (ARRIVAL_EXCEPTION_BLOCKED | ARRIVAL_EXCEPTION_SMI_DISABLED);
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!IsSyncTimerTimeout (Timer) && !(LmceEn && LmceSignal);
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)
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{
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mSmmMpSyncData->AllApArrivedWithException = AllCpusInSmmWithExceptions (ARRIVAL_EXCEPTION_BLOCKED | ARRIVAL_EXCEPTION_SMI_DISABLED);
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if (mSmmMpSyncData->AllApArrivedWithException) {
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break;
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}
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CpuPause ();
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}
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@@ -330,10 +334,14 @@ SmmWaitForApArrival (
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// Sync with APs 2nd timeout.
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//
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for (Timer = StartSyncTimer ();
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!IsSyncTimerTimeout (Timer) &&
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!AllCpusInSmmWithExceptions (ARRIVAL_EXCEPTION_BLOCKED | ARRIVAL_EXCEPTION_SMI_DISABLED);
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!IsSyncTimerTimeout (Timer);
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)
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{
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mSmmMpSyncData->AllApArrivedWithException = AllCpusInSmmWithExceptions (ARRIVAL_EXCEPTION_BLOCKED | ARRIVAL_EXCEPTION_SMI_DISABLED);
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if (mSmmMpSyncData->AllApArrivedWithException) {
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break;
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}
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CpuPause ();
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}
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}
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@@ -1887,6 +1895,8 @@ InitializeMpSyncData (
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*mSmmMpSyncData->InsideSmm = FALSE;
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*mSmmMpSyncData->AllCpusInSync = FALSE;
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mSmmMpSyncData->AllApArrivedWithException = FALSE;
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for (CpuIndex = 0; CpuIndex < gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus; CpuIndex++) {
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mSmmMpSyncData->CpuData[CpuIndex].Busy =
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(SPIN_LOCK *)((UINTN)mSmmCpuSemaphores.SemaphoreCpu.Busy + mSemaphoreSize * CpuIndex);
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