s390x: protvirt: Move diag 308 data over SIDA

For protected guests the IPIB is written/read to/from the SIDA, so we
need those accesses to go through s390_cpu_pv_mem_read/write().

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200319131921.2367-12-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

target/s390x/diag.c

@@ -75,6 +75,7 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
 {
     bool valid;
     CPUState *cs = env_cpu(env);
+    S390CPU *cpu = S390_CPU(cs);
     uint64_t addr =  env->regs[r1];
     uint64_t subcode = env->regs[r3];
     IplParameterBlock *iplb;
@@ -111,13 +112,22 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
             return;
         }
         iplb = g_new0(IplParameterBlock, 1);
-        cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
+        if (!s390_is_pv()) {
+            cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
+        } else {
+            s390_cpu_pv_mem_read(cpu, 0, iplb, sizeof(iplb->len));
+        }
+
         if (!iplb_valid_len(iplb)) {
             env->regs[r1 + 1] = DIAG_308_RC_INVALID;
             goto out;
         }
 
-        cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
+        if (!s390_is_pv()) {
+            cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
+        } else {
+            s390_cpu_pv_mem_read(cpu, 0, iplb, be32_to_cpu(iplb->len));
+        }
 
         valid = subcode == DIAG308_PV_SET ? iplb_valid_pv(iplb) : iplb_valid(iplb);
         if (!valid) {
@@ -140,12 +150,17 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
         } else {
             iplb = s390_ipl_get_iplb();
         }
-        if (iplb) {
+        if (!iplb) {
+            env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
+            return;
+        }
+
+        if (!s390_is_pv()) {
             cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
-            env->regs[r1 + 1] = DIAG_308_RC_OK;
         } else {
-            env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
+            s390_cpu_pv_mem_write(cpu, 0, iplb, be32_to_cpu(iplb->len));
         }
+        env->regs[r1 + 1] = DIAG_308_RC_OK;
         return;
     case DIAG308_PV_START:
         iplb = s390_ipl_get_iplb_pv();