[Qemu-devel] [PULL for-2.12 7/8] s390x/mmu: don't overwrite pending exception in mmu translate

[Cornelia Huck]

From: David Hildenbrand <address@hidden>

If we already triggered another exception, don't overwrite it with a
protection exception.

Only applies to old KVM instances without the virtual memory access
IOCTL in KVM.

Signed-off-by: David Hildenbrand <address@hidden>
Message-Id: <address@hidden>
Reviewed-by: Thomas Huth <address@hidden>
Acked-by: Christian Borntraeger <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
---
 target/s390x/mmu_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/s390x/mmu_helper.c b/target/s390x/mmu_helper.c
index 1deeb6e6e4..a25deef5dd 100644
--- a/target/s390x/mmu_helper.c
+++ b/target/s390x/mmu_helper.c
@@ -325,7 +325,7 @@ static int mmu_translate_asce(CPUS390XState *env, 
target_ulong vaddr,
 
     r = mmu_translate_region(env, vaddr, asc, asce, level, raddr, flags, rw,
                              exc);
-    if (rw == MMU_DATA_STORE && !(*flags & PAGE_WRITE)) {
+    if (!r && rw == MMU_DATA_STORE && !(*flags & PAGE_WRITE)) {
         trigger_prot_fault(env, vaddr, asc, rw, exc);
         return -1;
     }
-- 
2.14.3