From 48de494bb4befce3b1c466c4ec132540d504047f Mon Sep 17 00:00:00 2001
From: Dun Tan <dun.tan@intel.com>
Date: Fri, 21 Jul 2023 17:44:08 +0800
Subject: UefiCpuPkg/S3Resume2Pei: assert for invalid excution mode combo

Add assert for invalid excution mode combination of 64bit PEI +
32bit DXE.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
---
 UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
index 1fd5670c7f..4cf676fb3e 100644
--- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
+++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
@@ -1106,6 +1106,13 @@ S3RestoreConfig2 (
     DEBUG ((DEBUG_INFO, "SMM S3 Return Stack Pointer     = %x\n", SmmS3ResumeState->ReturnStackPointer));
     DEBUG ((DEBUG_INFO, "SMM S3 Smst                     = %x\n", SmmS3ResumeState->Smst));
 
+    //
+    // 64bit PEI and 32bit DXE is not a supported combination.
+    //
+    if (SmmS3ResumeState->Signature == SMM_S3_RESUME_SMM_32) {
+      ASSERT (sizeof (UINTN) == sizeof (UINT32));
+    }
+
     //
     // Directly do the switch stack when PEI and SMM env run in the same execution mode.
     //
-- 
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