+  //
+  // Check whether the Required TileSize is enough.
+  //
+  if (TileSize > SIZE_8KB) {
+    DEBUG ((DEBUG_ERROR, "The Range of Smbase in SMRAM is not enough -- Required TileSize = 0x%08x, Actual TileSize = 0x%08x\n", TileSize, SIZE_8KB));
+    FreePool (mCpuHotPlugData.SmBase);
+    FreePool (gSmmCpuPrivate->ProcessorInfo);
+    CpuDeadLoop ();
+    return RETURN_BUFFER_TOO_SMALL;
   }

[Ray] Can you move the "TileSize" check just below the original TileSize calculation logic? Others look good to me.