[PATCH v3 13/17] s390x: protvirt: Move diag 308 data over SIDAD

[Janosch Frank <frankja@linux.ibm.com>]

For protected guests the IPIB is written/read to/from the satellite
block, so we need to make those accesses virtual to make them go
through KVM mem ops.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
 target/s390x/diag.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/target/s390x/diag.c b/target/s390x/diag.c
index 6aaeef6029..59ae122e82 100644
--- a/target/s390x/diag.c
+++ b/target/s390x/diag.c
@@ -88,6 +88,7 @@ static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr,
 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
 {
     CPUState *cs = env_cpu(env);
+    S390CPU *cpu = S390_CPU(cs);
     uint64_t addr =  env->regs[r1];
     uint64_t subcode = env->regs[r3];
     IplParameterBlock *iplb;
@@ -118,14 +119,24 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
         if (diag308_parm_check(env, r1, addr, ra, false)) {
             return;
         }
+
         iplb = g_new0(IplParameterBlock, 1);
-        cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
+        if (!env->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 (!env->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));
+        }
 
         if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb) &&
             !(iplb_valid_pv(iplb) && s390_ipl_pv_check_components(iplb) >= 0)) {
@@ -137,23 +148,30 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
         env->regs[r1 + 1] = DIAG_308_RC_OK;
 out:
         g_free(iplb);
-        return;
+        break;
     case DIAG308_STORE:
     case DIAG308_PV_STORE:
         if (diag308_parm_check(env, r1, addr, ra, true)) {
             return;
         }
+
         if (subcode == DIAG308_PV_STORE) {
             iplb = s390_ipl_get_iplb_secure();
         } else {
             iplb = s390_ipl_get_iplb();
         }
-        if (iplb) {
-            cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
-            env->regs[r1 + 1] = DIAG_308_RC_OK;
-        } else {
+        if (!iplb) {
             env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
+            return;
         }
+
+        if (!env->pv) {
+            cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
+        } else {
+            s390_cpu_pv_mem_write(cpu, 0, iplb, be32_to_cpu(iplb->len));
+        }
+
+        env->regs[r1 + 1] = DIAG_308_RC_OK;
         break;
     case DIAG308_PV_START:
         iplb = s390_ipl_get_iplb_secure();
-- 
2.20.1