Add MM::PageMap::GetXpaStatus() for querying PML level

xtoskrnl/mm/i686/pagemap.cc

@@ -210,6 +210,20 @@ MM::PageMap::GetPteVirtualAddress(IN PMMPTE PtePointer)
     return ((PVOID)((ULONG)(PtePointer) << 10));
 }
 
+/**
+ * Gets the status of Extended Paging Address (XPA) mode.
+ *
+ * @return This routine returns TRUE if XPA is enabled, FALSE otherwise.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+BOOLEAN
+MM::PageMap::GetXpaStatus()
+{
+    return PageMapInfo.Xpa;
+}
+
 /**
  * Advances a PTE pointer by a given number of entries, considering the actual PTE size for PML2.
  *