s390x: misc fixes

bunch of fixes
 - reject MIDA accesses for CCWs
 - cpumodel fixes
 - cross-build fix for bios
 - migration improvements
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Merge remote-tracking branch 'remotes/borntraeger/tags/s390x-20170608' into staging

s390x: misc fixes

bunch of fixes
- reject MIDA accesses for CCWs
- cpumodel fixes
- cross-build fix for bios
- migration improvements

# gpg: Signature made Thu 08 Jun 2017 14:10:29 BST
# gpg:                using RSA key 0x117BBC80B5A61C7C
# gpg: Good signature from "Christian Borntraeger (IBM) <borntraeger@de.ibm.com>"
# Primary key fingerprint: F922 9381 A334 08F9 DBAB  FBCA 117B BC80 B5A6 1C7C

* remotes/borntraeger/tags/s390x-20170608:
  s390x/cpumodel: improve defintion search without an IBC
  s390x/cpumodel: take care of the cpuid format bit for KVM
  pc-bios/s390-ccw: use STRIP variable in Makefile
  s390x/css: fence off MIDA
  s390x/css: catch section mismatch on load

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/s390x/cpu_models.c

@@ -184,6 +184,7 @@ const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
                                     S390FeatBitmap features)
 {
     const S390CPUDef *last_compatible = NULL;
+    const S390CPUDef *matching_cpu_type = NULL;
     int i;
 
     if (!gen) {
@@ -218,8 +219,16 @@ const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
         if (def->type == type && def->ec_ga == ec_ga) {
             return def;
         }
+        /* remember if we've at least seen one with the same cpu type */
+        if (def->type == type) {
+            matching_cpu_type = def;
+        }
         last_compatible = def;
     }
+    /* prefer the model with the same cpu type, esp. don't take the BC for EC */
+    if (matching_cpu_type) {
+        return matching_cpu_type;
+    }
     return last_compatible;
 }
 
@@ -767,6 +776,7 @@ void s390_realize_cpu_model(CPUState *cs, Error **errp)
     /* copy over properties that can vary */
     cpu->model->lowest_ibc = max_model->lowest_ibc;
     cpu->model->cpu_id = max_model->cpu_id;
+    cpu->model->cpu_id_format = max_model->cpu_id_format;
     cpu->model->cpu_ver = max_model->cpu_ver;
 
     check_consistency(cpu->model);