[PATCH 1/3] UefiCpuPkg/PiSmmCpu: Add Internal function IsStaticPageTableEnabled

["Ni, Ray" <ray.ni@intel.com>]

The internal function reflects the status whether static page table
is enabled.

Signed-off-by: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Eric Dong <eric.dong@intel.com.
---
 UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c   | 16 ++++++++++++++++
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h | 15 +++++++++++++++
 UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c    | 16 ++++++++++++++++
 3 files changed, 47 insertions(+)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
index 05fb455936..2a9af4b77d 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
@@ -28,6 +28,22 @@ EnableCet (
   VOID
   );
 
+/**
+  Return whether Static Page Table is enabled.
+
+  Note: Static Page Table is always disabled for IA32 build.
+
+  @retval TRUE  Static Page Table is enabled.
+  @retval FALSE Static Page Table is disabled.
+**/
+BOOLEAN
+IsStaticPageTableEnabled (
+  VOID
+  )
+{
+  return FALSE;
+}
+
 /**
   Create PageTable for SMM use.
 
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
index 186809f431..14b7676c16 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
@@ -1267,6 +1267,21 @@ EFIAPI
 PiSmmCpuSmiEntryFixupAddress (
  );
 
+
+/**
+  Return whether Static Page Table is enabled.
+
+  Note: Static Page Table is always disabled for IA32 build.
+
+  @retval TRUE  Static Page Table is enabled.
+  @retval FALSE Static Page Table is disabled.
+**/
+BOOLEAN
+IsStaticPageTableEnabled (
+  VOID
+  )
+;
+
 /**
   This function reads CR2 register when on-demand paging is enabled
   for 64 bit and no action for 32 bit.
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
index a3b62f7787..18e3f9e08d 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
@@ -37,6 +37,22 @@ EnableCet (
   VOID
   );
 
+/**
+  Return whether Static Page Table is enabled.
+
+  Note: Static Page Table is always disabled for IA32 build.
+
+  @retval TRUE  Static Page Table is enabled.
+  @retval FALSE Static Page Table is disabled.
+**/
+BOOLEAN
+IsStaticPageTableEnabled (
+  VOID
+  )
+{
+  return mCpuSmmStaticPageTable;
+}
+
 /**
   Check if 1-GByte pages is supported by processor or not.
 
-- 
2.21.0.windows.1