s390x/mmu: Fix the check for the real-space designation bit

The real-space designation bits live in the ASCEs, not in the table entries,
so the check must be done before we start walking the MMU table.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

diff --git a/target-s390x/mmu_helper.c b/target-s390x/mmu_helper.c
index fc4f7c5..c845cd4 100644 (file)
--- a/target-s390x/mmu_helper.c
+++ b/target-s390x/mmu_helper.c
@@ -180,13 +180,6 @@ static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr,
         return -1;
     }
 
-    if (asce & _ASCE_REAL_SPACE) {
-        /* direct mapping */
-
-        *raddr = vaddr;
-        return 0;
-    }
-
     origin = asce & _ASCE_ORIGIN;
 
     switch (level) {
@@ -252,6 +245,12 @@ static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr,
         break;
     }
 
+    if (asce & _ASCE_REAL_SPACE) {
+        /* direct mapping */
+        *raddr = vaddr;
+        return 0;
+    }
+
     switch (asce & _ASCE_TYPE_MASK) {
     case _ASCE_TYPE_REGION1:
         break;