1 files changed, 4 insertions, 3 deletions
diff --git a/OvmfPkg/SmmAccess/SmmAccessPei.c b/OvmfPkg/SmmAccess/SmmAccessPei.c
index 76790e330f..a3631a1b9d 100644
--- a/OvmfPkg/SmmAccess/SmmAccessPei.c
+++ b/OvmfPkg/SmmAccess/SmmAccessPei.c
@@ -318,8 +318,9 @@ SmmAccessPeiEntryPoint (
   //
   // Set TSEG Memory Base.
   //
+  InitQ35TsegMbytes ();
   PciWrite32 (DRAMC_REGISTER_Q35 (MCH_TSEGMB),
-    (TopOfLowRamMb - FixedPcdGet16 (PcdQ35TsegMbytes)) << MCH_TSEGMB_MB_SHIFT);
+    (TopOfLowRamMb - mQ35TsegMbytes) << MCH_TSEGMB_MB_SHIFT);
 
   //
   // Set TSEG size, and disable TSEG visibility outside of SMM. Note that the
@@ -327,8 +328,8 @@ SmmAccessPeiEntryPoint (
   // *restricted* to SMM.
   //
   EsmramcVal &= ~(UINT32)MCH_ESMRAMC_TSEG_MASK;
-  EsmramcVal |= FixedPcdGet16 (PcdQ35TsegMbytes) == 8 ? MCH_ESMRAMC_TSEG_8MB :
-                FixedPcdGet16 (PcdQ35TsegMbytes) == 2 ? MCH_ESMRAMC_TSEG_2MB :
+  EsmramcVal |= mQ35TsegMbytes == 8 ? MCH_ESMRAMC_TSEG_8MB :
+                mQ35TsegMbytes == 2 ? MCH_ESMRAMC_TSEG_2MB :
                 MCH_ESMRAMC_TSEG_1MB;
   EsmramcVal |= MCH_ESMRAMC_T_EN;
   PciWrite8 (DRAMC_REGISTER_Q35 (MCH_ESMRAMC), EsmramcVal);