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UefiCpuPkg: Extend SMM CPU Service with rendezvous support.

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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>
This commit is contained in:
Li, Zhihao
2022-03-01 19:22:19 +08:00
committed by mergify[bot]
parent b83d0a6438
commit 4a68176cb5
10 changed files with 322 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
UefiCpuPkg/PiSmmCpuDxeSmm/CpuService.c
View File

@@ -1,7 +1,7 @@
/** @file
Implementation of SMM CPU Services Protocol.
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2011 - 2022, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -20,6 +20,13 @@ EFI_SMM_CPU_SERVICE_PROTOCOL mSmmCpuService = {
SmmRegisterExceptionHandler
};
//
// EDKII SMM CPU Rendezvous Service Protocol instance
//
EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL mSmmCpuRendezvousService = {
SmmCpuRendezvous
};
/**
Gets processor information on the requested processor at the instant this call is made.
@@ -350,6 +357,7 @@ SmmRegisterExceptionHandler (
@param ImageHandle The firmware allocated handle for the EFI image.
@retval EFI_SUCCESS EFI SMM CPU Services Protocol was installed successfully.
@retval OTHER Fail to install Protocol.
**/
EFI_STATUS
InitializeSmmCpuServices (
@@ -365,5 +373,64 @@ InitializeSmmCpuServices (
&mSmmCpuService
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gSmst->SmmInstallProtocolInterface (
&Handle,
&gEdkiiSmmCpuRendezvousProtocolGuid,
EFI_NATIVE_INTERFACE,
&mSmmCpuRendezvousService
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Wait for all processors enterring SMM until all CPUs are already synchronized or not.
If BlockingMode is False, timeout value is zero.
@param This A pointer to the EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL instance.
@param BlockingMode Blocking mode or non-blocking mode.
@retval EFI_SUCCESS All avaiable APs arrived.
@retval EFI_TIMEOUT Wait for all APs until timeout.
**/
EFI_STATUS
EFIAPI
SmmCpuRendezvous (
IN EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL *This,
IN BOOLEAN BlockingMode
)
{
EFI_STATUS Status;
//
// Return success immediately if all CPUs are already synchronized.
//
if (mSmmMpSyncData->AllApArrivedWithException) {
Status = EFI_SUCCESS;
goto ON_EXIT;
}
if (!BlockingMode) {
Status = EFI_TIMEOUT;
goto ON_EXIT;
}
//
// There are some APs outside SMM, Wait for all avaiable APs to arrive.
//
SmmWaitForApArrival ();
Status = mSmmMpSyncData->AllApArrivedWithException ? EFI_SUCCESS : EFI_TIMEOUT;
ON_EXIT:
if (!mSmmMpSyncData->AllApArrivedWithException) {
DEBUG ((DEBUG_INFO, "EdkiiSmmWaitForAllApArrival: Timeout to wait all APs arrival\n"));
}
return Status;
}