X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=IntelSiliconPkg%2FFeature%2FVTd%2FIntelVTdDxe%2FTranslationTable.c;h=7bdc4a5146bd88f56fda72106fdcedcbf09b5a99;hp=cecb5d23efbf36aa4d3c578db276cb9bcf8e3e1d;hb=1d4c17a6ef1a06023cb533d108556c419bdb1fed;hpb=9c6961d5987c1cabe4d7136fe506f00ce1c501c8

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
index cecb5d23ef..7bdc4a5146 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
@@ -286,9 +286,13 @@ CreateSecondLevelPagingEntry (
   if (SecondLevelPagingEntry == NULL) {
     return NULL;
   }
-  SecondLevelPagingEntry = CreateSecondLevelPagingEntryTable (VtdIndex, SecondLevelPagingEntry, SIZE_4GB, mAbove4GMemoryLimit, IoMmuAccess);
-  if (SecondLevelPagingEntry == NULL) {
-    return NULL;
+
+  if (mAbove4GMemoryLimit != 0) {
+    ASSERT (mAbove4GMemoryLimit > BASE_4GB);
+    SecondLevelPagingEntry = CreateSecondLevelPagingEntryTable (VtdIndex, SecondLevelPagingEntry, SIZE_4GB, mAbove4GMemoryLimit, IoMmuAccess);
+    if (SecondLevelPagingEntry == NULL) {
+      return NULL;
+    }
   }
 
   return SecondLevelPagingEntry;