UefiCpuPkg/PiSmmCpuDxeSmm: Remove RestrictedMemoryAccess check for MM CPU

The PcdCpuSmmRestrictedMemoryAccess is declared as either a dynamic or fixed
PCD. It is not recommended for use in the MM CPU driver.

Furthermore, IsRestrictedMemoryAccess() is only needed for SMM. Therefor,
there is no need for MM to consume the PcdCpuSmmRestrictedMemoryAccess.

So, this patch is to add the SMM specific file for its own functions, with
the change, the dependency of the MM CPU driver on
PcdCpuSmmRestrictedMemoryAccess can be removed.

Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>

UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c

@@ -229,17 +229,3 @@ RestoreCr2 (
 {
   return;
 }
-
-/**
-  Return whether access to non-SMRAM is restricted.
-
-  @retval TRUE  Access to non-SMRAM is restricted.
-  @retval FALSE Access to non-SMRAM is not restricted.
-**/
-BOOLEAN
-IsRestrictedMemoryAccess (
-  VOID
-  )
-{
-  return TRUE;
-}

UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmFuncsArchDxeSmm.c

@@ -0,0 +1,22 @@
+/** @file
+
+Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "PiSmmCpuCommon.h"
+
+/**
+  Return whether access to non-SMRAM is restricted.
+
+  @retval TRUE  Access to non-SMRAM is restricted.
+  @retval FALSE Access to non-SMRAM is not restricted.
+**/
+BOOLEAN
+IsRestrictedMemoryAccess (
+  VOID
+  )
+{
+  return TRUE;
+}

UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf

@@ -56,6 +56,7 @@
   Ia32/SmiEntry.nasm
   Ia32/SmiException.nasm
   Ia32/Cet.nasm
+  Ia32/SmmFuncsArchDxeSmm.c
 
 [Sources.X64]
   X64/PageTbl.c
@@ -65,6 +66,7 @@
   X64/SmiEntry.nasm
   X64/SmiException.nasm
   X64/Cet.nasm
+  X64/SmmFuncsArchDxeSmm.c
 
 [Packages]
   MdePkg/MdePkg.dec

UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuStandaloneMm.inf

@@ -131,6 +131,3 @@
 
 [Depex]
   TRUE
-
-[Pcd.X64]
-  gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmRestrictedMemoryAccess        ## CONSUMES

UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c

@@ -866,17 +866,3 @@ RestoreCr2 (
 {
   AsmWriteCr2 (Cr2);
 }
-
-/**
-  Return whether access to non-SMRAM is restricted.
-
-  @retval TRUE  Access to non-SMRAM is restricted.
-  @retval FALSE Access to non-SMRAM is not restricted.
-**/
-BOOLEAN
-IsRestrictedMemoryAccess (
-  VOID
-  )
-{
-  return PcdGetBool (PcdCpuSmmRestrictedMemoryAccess);
-}

UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmmFuncsArchDxeSmm.c

@@ -0,0 +1,22 @@
+/** @file
+
+Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "PiSmmCpuCommon.h"
+
+/**
+  Return whether access to non-SMRAM is restricted.
+
+  @retval TRUE  Access to non-SMRAM is restricted.
+  @retval FALSE Access to non-SMRAM is not restricted.
+**/
+BOOLEAN
+IsRestrictedMemoryAccess (
+  VOID
+  )
+{
+  return PcdGetBool (PcdCpuSmmRestrictedMemoryAccess);
+}