2 files changed, 35 insertions, 2 deletions
diff --git a/UefiCpuPkg/Include/Library/SmmCpuPlatformHookLib.h b/UefiCpuPkg/Include/Library/SmmCpuPlatformHookLib.h
index f9cc3f7249..149a694891 100644
--- a/UefiCpuPkg/Include/Library/SmmCpuPlatformHookLib.h
+++ b/UefiCpuPkg/Include/Library/SmmCpuPlatformHookLib.h
@@ -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
diff --git a/UefiCpuPkg/Library/SmmCpuPlatformHookLibNull/SmmCpuPlatformHookLibNull.c b/UefiCpuPkg/Library/SmmCpuPlatformHookLibNull/SmmCpuPlatformHookLibNull.c
index 085a03e52a..b03a72d177 100644
--- a/UefiCpuPkg/Library/SmmCpuPlatformHookLibNull/SmmCpuPlatformHookLibNull.c
+++ b/UefiCpuPkg/Library/SmmCpuPlatformHookLibNull/SmmCpuPlatformHookLibNull.c
@@ -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;
+}