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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
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29
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
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@@ -1,7 +1,7 @@
/** @file
Agent Module to load other modules to deploy SMM Entry Vector for X86 CPU.
Copyright (c) 2009 - 2020, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2009 - 2022, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -428,6 +428,7 @@ typedef struct {
volatile SMM_CPU_SYNC_MODE EffectiveSyncMode;
volatile BOOLEAN SwitchBsp;
volatile BOOLEAN *CandidateBsp;
volatile BOOLEAN AllApArrivedWithException;
EFI_AP_PROCEDURE StartupProcedure;
VOID *StartupProcArgs;
} SMM_DISPATCHER_MP_SYNC_DATA;
@@ -1488,4 +1489,30 @@ IsRestrictedMemoryAccess (
VOID
);
/**
Choose blocking or non-blocking mode to Wait for all APs.
@param[in] This A pointer to the EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL instance.
@param[in] BlockingMode Blocking or non-blocking mode.
@retval EFI_SUCCESS All APs have arrived SMM mode except SMI disabled APs.
@retval EFI_TIMEOUT There are APs not in SMM mode in given timeout constraint.
**/
EFI_STATUS
EFIAPI
SmmCpuRendezvous (
IN EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL *This,
IN BOOLEAN BlockingMode
);
/**
Insure when this function returns, no AP will execute normal mode code before entering SMM, except SMI disabled APs.
**/
VOID
SmmWaitForApArrival (
VOID
);
#endif