[Patch V4 15/15] UefiCpuPkg/PiSmmCpuDxeSmm: Remove unnecessary function

["duntan" <dun.tan@intel.com>]

Remove unnecessary function SetNotPresentPage(). We can directly
use ConvertMemoryPageAttributes to set a range to non-present.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c         |  8 ++++++--
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h         | 16 ----------------
 UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c | 22 ----------------------
 3 files changed, 6 insertions(+), 40 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
index d69e976269..7fa1867b63 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
@@ -1074,10 +1074,14 @@ PiCpuSmmEntry (
         mSmmShadowStackSize
         );
       if (FeaturePcdGet (PcdCpuSmmStackGuard)) {
-        SetNotPresentPage (
+        ConvertMemoryPageAttributes (
           Cr3,
+          mPagingMode,
           (EFI_PHYSICAL_ADDRESS)(UINTN)Stacks + mSmmStackSize + EFI_PAGES_TO_SIZE (1) + (mSmmStackSize + mSmmShadowStackSize) * Index,
-          EFI_PAGES_TO_SIZE (1)
+          EFI_PAGES_TO_SIZE (1),
+          EFI_MEMORY_RP,
+          TRUE,
+          NULL
           );
       }
     }
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
index 12ad86028e..0dc4d758cc 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
@@ -1247,22 +1247,6 @@ SetShadowStack (
   IN  UINT64                Length
   );
 
-/**
-  Set not present memory.
-
-  @param[in]  Cr3              The page table base address.
-  @param[in]  BaseAddress      The physical address that is the start address of a memory region.
-  @param[in]  Length           The size in bytes of the memory region.
-
-  @retval EFI_SUCCESS           The not present memory is set.
-**/
-EFI_STATUS
-SetNotPresentPage (
-  IN  UINTN                 Cr3,
-  IN  EFI_PHYSICAL_ADDRESS  BaseAddress,
-  IN  UINT64                Length
-  );
-
 /**
   Initialize the shadow stack related data structure.
 
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
index 138ff43c9d..95de472ebf 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
@@ -752,28 +752,6 @@ SetShadowStack (
   return Status;
 }
 
-/**
-  Set not present memory.
-
-  @param[in]  Cr3              The page table base address.
-  @param[in]  BaseAddress      The physical address that is the start address of a memory region.
-  @param[in]  Length           The size in bytes of the memory region.
-
-  @retval EFI_SUCCESS           The not present memory is set.
-**/
-EFI_STATUS
-SetNotPresentPage (
-  IN  UINTN                 Cr3,
-  IN  EFI_PHYSICAL_ADDRESS  BaseAddress,
-  IN  UINT64                Length
-  )
-{
-  EFI_STATUS  Status;
-
-  Status = SmmSetMemoryAttributesEx (Cr3, mPagingMode, BaseAddress, Length, EFI_MEMORY_RP);
-  return Status;
-}
-
 /**
   Retrieves a pointer to the system configuration table from the SMM System Table
   based on a specified GUID.
-- 
2.31.1.windows.1