X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=UefiCpuPkg%2FPiSmmCpuDxeSmm%2FIa32%2FPageTbl.c;h=9447a31ef5691b4fe0d1bcf792a9419151195ad2;hp=641a1d69a238f563eccb7f77e2f2869ef7e0d05b;hb=af4f4b3468aa239c61418ff899bfd239eae57b2d;hpb=235a4490c8ce8b6dbac49e6ae3559cb73d6bf620

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
index 641a1d69a2..9447a31ef5 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
@@ -196,6 +196,16 @@ SetPageTableAttributes (
   BOOLEAN               IsSplitted;
   BOOLEAN               PageTableSplitted;
 
+  //
+  // Don't mark page table as read-only if heap guard is enabled.
+  //
+  //      BIT2: SMM page guard enabled
+  //      BIT3: SMM pool guard enabled
+  //
+  if ((PcdGet8 (PcdHeapGuardPropertyMask) & (BIT3 | BIT2)) != 0) {
+    return ;
+  }
+
   DEBUG ((DEBUG_INFO, "SetPageTableAttributes\n"));
 
   //