diff --git a/SecurityPkg/SecurityPkg.dsc b/SecurityPkg/SecurityPkg.dsc
index 74ec429662..a77665518b 100644
--- a/SecurityPkg/SecurityPkg.dsc
+++ b/SecurityPkg/SecurityPkg.dsc
@@ -67,6 +67,7 @@
   VariableKeyLib|SecurityPkg/Library/VariableKeyLibNull/VariableKeyLibNull.inf
   RpmcLib|SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf
   TcgEventLogRecordLib|SecurityPkg/Library/TcgEventLogRecordLib/TcgEventLogRecordLib.inf
+  MmUnblockMemoryLib|MdePkg/Library/MmUnblockMemoryLib/MmUnblockMemoryLibNull.inf
 
 [LibraryClasses.ARM]
   #
diff --git a/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c b/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c
index 924c3b4edd..e8844e474a 100644
--- a/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c
+++ b/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c
@@ -38,6 +38,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Library/Tpm2DeviceLib.h>
 #include <Library/Tpm2CommandLib.h>
 #include <Library/UefiLib.h>
+#include <Library/MmUnblockMemoryLib.h>
 
 //
 // Physical Presence Interface Version supported by Platform
@@ -147,6 +148,11 @@ AssignOpRegion (
       ZeroMem ((VOID *)(UINTN)MemoryAddress, Size);
       OpRegion->RegionOffset = (UINT32) (UINTN) MemoryAddress;
       OpRegion->RegionLen    = (UINT8) Size;
+      // Request to unblock this region from MM core
+      Status = MmUnblockMemoryRequest (MemoryAddress, EFI_SIZE_TO_PAGES (Size));
+      if (Status != EFI_UNSUPPORTED && EFI_ERROR (Status)) {
+        ASSERT_EFI_ERROR (Status);
+      }
       break;
     }
   }
diff --git a/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.inf b/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.inf
index 42ddb4bd1f..f1c6ae5b1c 100644
--- a/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.inf
+++ b/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.inf
@@ -57,6 +57,7 @@
   Tpm2CommandLib
   Tcg2PhysicalPresenceLib
   PcdLib
+  MmUnblockMemoryLib
 
 [Guids]
   gEfiTpmDeviceInstanceTpm20DtpmGuid                            ## PRODUCES           ## GUID       # TPM device identifier