+  VariableRuntimeCacheHob = BuildGuidHob (&gEdkiiVariableRuntimeCacheInfoHobGuid, sizeof (VARIABLE_RUNTIME_CACHE_INFO));
+  ASSERT (VariableRuntimeCacheHob != NULL);
+  ZeroMem (VariableRuntimeCacheHob, sizeof (VARIABLE_RUNTIME_CACHE_INFO));
+
+  //
+  // AllocateRuntimePages for CACHE_INFO_FLAG and unblock it.
+  //
+  Pages  = EFI_SIZE_TO_PAGES (sizeof (CACHE_INFO_FLAG));
+  Buffer = AllocateRuntimePages (Pages);
+  ASSERT (Buffer != NULL);
+  Status = MmUnblockMemoryRequest (
+             (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer,
+             Pages
+             );
+  if ((Status != EFI_UNSUPPORTED) && EFI_ERROR (Status)) {
+    return Status;

[Ray.1] The GUID hob is created already. Maybe you should defer the HOB creation to later phase.

+  }
+
+  VariableRuntimeCacheHob->CacheInfoFlag = (CACHE_INFO_FLAG *)(UINTN)Buffer;
+  DEBUG ((
+    DEBUG_INFO,
+    "PeiVariable: CACHE_INFO_FLAG Buffer is: 0x%x, number of pages is: 0x%x\n",

[Ray.2] please use "%p" for pointer dump. "%x" only prints "int" type value.

[Ray.3]I think you should create HOB at this point.