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s390x/mmu: don't overwrite pending exception in mmu translate 

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 <david@redhat.com>
Message-Id: <20180409113019.14568-2-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
David Hildenbrand 2018-04-09 13:30:18 +02:00 committed by Cornelia Huck
parent be4d026f64
commit 61a17fea6d
1 changed files with 1 additions and 1 deletions
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2
target/s390x/mmu_helper.c
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@ -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;
}