[Qemu-devel] [PATCH-for-4.2 v1 1/9] s390x/mmu: Better ASC selection in s390_cpu_get_phys_page_debug()

[David Hildenbrand <david@redhat.com>]

Let's select the ASC before calling the function and use MMU_DATA_LOAD.
This is a preparation to:
- Remove the ASC magic depending on the access mode from mmu_translate
- Implement IEP support, where we could run into access exceptions
  trying to fetch instructions

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/helper.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/target/s390x/helper.c b/target/s390x/helper.c
index 13ae9909ad..08166558a0 100644
--- a/target/s390x/helper.c
+++ b/target/s390x/helper.c
@@ -58,7 +58,15 @@ hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr)
         vaddr &= 0x7fffffff;
     }
 
-    if (mmu_translate(env, vaddr, MMU_INST_FETCH, asc, &raddr, &prot, false)) {
+    /*
+     * We want to read the code, however, not run into access exceptions
+     * (especially, IEP).
+     */
+    if (asc != PSW_ASC_HOME) {
+        asc = PSW_ASC_PRIMARY;
+    }
+
+    if (mmu_translate(env, vaddr, MMU_DATA_LOAD, asc, &raddr, &prot, false)) {
         return -1;
     }
     return raddr;
-- 
2.21.0