diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
index 7e7139af69..59bd17f31b 100644
--- a/OvmfPkg/AmdSev/AmdSevX64.dsc
+++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
@@ -535,6 +535,8 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved|0
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution|800
diff --git a/OvmfPkg/Bhyve/BhyveX64.dsc b/OvmfPkg/Bhyve/BhyveX64.dsc
index abeff26279..e833fc716b 100644
--- a/OvmfPkg/Bhyve/BhyveX64.dsc
+++ b/OvmfPkg/Bhyve/BhyveX64.dsc
@@ -513,6 +513,8 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved|0
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution|800
diff --git a/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.c b/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.c
index 99558e97eb..4fc715dc36 100644
--- a/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.c
+++ b/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.c
@@ -782,16 +782,16 @@ FvbInitialize (
     InitializeFvAndVariableStoreHeaders (Ptr);
   }
 
-  PcdStatus = PcdSet64S (PcdFlashNvStorageVariableBase64, (UINT32)(UINTN)Ptr);
+  PcdStatus = PcdSet64S (PcdFlashNvStorageVariableBase64, (UINTN)Ptr);
   ASSERT_RETURN_ERROR (PcdStatus);
 
   //
   // Initialize the Fault Tolerant Write data area
   //
   SubPtr    = (VOID *)((UINT8 *)Ptr + PcdGet32 (PcdFlashNvStorageVariableSize));
-  PcdStatus = PcdSet32S (
-                PcdFlashNvStorageFtwWorkingBase,
-                (UINT32)(UINTN)SubPtr
+  PcdStatus = PcdSet64S (
+                PcdFlashNvStorageFtwWorkingBase64,
+                (UINTN)SubPtr
                 );
   ASSERT_RETURN_ERROR (PcdStatus);
 
@@ -800,9 +800,9 @@ FvbInitialize (
   //
   SubPtr = (VOID *)((UINT8 *)Ptr +
                     EMU_FVB_NUM_SPARE_BLOCKS * EMU_FVB_BLOCK_SIZE);
-  PcdStatus = PcdSet32S (
-                PcdFlashNvStorageFtwSpareBase,
-                (UINT32)(UINTN)SubPtr
+  PcdStatus = PcdSet64S (
+                PcdFlashNvStorageFtwSpareBase64,
+                (UINTN)SubPtr
                 );
   ASSERT_RETURN_ERROR (PcdStatus);
 
diff --git a/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf b/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
index 225ea27f5f..0811545cf7 100644
--- a/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
+++ b/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
@@ -59,8 +59,8 @@
 
 [Pcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
-  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase
-  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved
 
 [Depex]
diff --git a/OvmfPkg/Microvm/MicrovmX64.dsc b/OvmfPkg/Microvm/MicrovmX64.dsc
index 717ad52733..5f4d922679 100644
--- a/OvmfPkg/Microvm/MicrovmX64.dsc
+++ b/OvmfPkg/Microvm/MicrovmX64.dsc
@@ -553,6 +553,8 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved|0
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution|800
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 40fc695714..f8873d5155 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -597,6 +597,8 @@
 
 !if $(SMM_REQUIRE) == FALSE
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
 !endif
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index fd5153ff48..9b72575da1 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -603,6 +603,8 @@
 
 !if $(SMM_REQUIRE) == FALSE
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
 !endif
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index ab4b3f66a3..190cb7f099 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -602,6 +602,8 @@
 
 !if $(SMM_REQUIRE) == FALSE
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
 !endif
diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index b484c0ae72..de0d30bfb8 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -461,6 +461,8 @@
 [PcdsDynamicDefault]
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution|800