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UefiCpuPkg: Add SmmCpuPlatformHookBeforeMmiHandler

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This patch is to add SmmCpuPlatformHookBeforeMmiHandler interface
in SmmCpuPlatformHookLib.

The new API can be used to perform the platform specific items
before executing MMI Handler. For example, Intel can leverage
this API to clear the pending SMI bit after all CPUs finish the
sync and before the MMI handlers. If so, the the redundant
SMI can be avoided after CPU exit from current SMI.

Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
This commit is contained in:
Jiaxin Wu 2024-09-10 11:52:36 +08:00 committed by mergify[bot]
parent 2351165f1b
commit 7d4da670ea
2 changed files with 35 additions and 2 deletions
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17
UefiCpuPkg/Include/Library/SmmCpuPlatformHookLib.h
View File

@ -1,7 +1,7 @@
/** @file
Public include file for the SMM CPU Platform Hook Library.
Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2010 - 2024, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -100,4 +100,19 @@ GetPlatformPageTableAttribute (
OUT UINTN *PageAttribute
);
/**
SMM CPU Platform Hook before executing MMI Handler.
This function can be used to perform the platform specific items before executing MMI Handler.
@retval EFI_SUCCESS The smm cpu platform hook before executing MMI Handler is executed successfully.
@retval EFI_UNSUPPORTED The smm cpu platform hook before executing MMI Handler is unsupported.
**/
EFI_STATUS
EFIAPI
SmmCpuPlatformHookBeforeMmiHandler (
VOID
);
#endif

20
UefiCpuPkg/Library/SmmCpuPlatformHookLibNull/SmmCpuPlatformHookLibNull.c
View File

@ -1,7 +1,7 @@
/** @file
SMM CPU Platform Hook NULL library instance.
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2024, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -100,3 +100,21 @@ GetPlatformPageTableAttribute (
{
return EFI_UNSUPPORTED;
}
/**
SMM CPU Platform Hook before executing MMI Handler.
This function can be used to perform the platform specific items before executing MMI Handler.
@retval EFI_SUCCESS The smm cpu platform hook before executing MMI Handler is executed successfully.
@retval EFI_UNSUPPORTED The smm cpu platform hook before executing MMI Handler is unsupported.
**/
EFI_STATUS
EFIAPI
SmmCpuPlatformHookBeforeMmiHandler (
VOID
)
{
return EFI_UNSUPPORTED;
}