s390x/kvm: pass the SIGP instruction parameter to the SIGP handler

The parameter of the SIGP instruction will be neded in the future. Let's read it
out and store it in the struct sigp_info, so it can be passed to the sigp
handlers.
Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Message-Id: <1424783731-43426-4-git-send-email-jfrei@linux.vnet.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>

target-s390x/kvm.c

@@ -1113,6 +1113,7 @@ static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb)
 
 typedef struct SigpInfo {
     S390CPU *cpu;
+    uint64_t param;
     int cc;
     uint64_t *status_reg;
 } SigpInfo;
@@ -1174,10 +1175,11 @@ static void sigp_cpu_reset(void *arg)
 }
 
 static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order,
-                                  uint64_t *status_reg)
+                                  uint64_t param, uint64_t *status_reg)
 {
     SigpInfo si = {
         .cpu = dst_cpu,
+        .param = param,
         .status_reg = status_reg,
     };
 
@@ -1218,6 +1220,7 @@ static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
     int ret;
     uint8_t order;
     uint64_t *status_reg;
+    uint64_t param;
     S390CPU *dst_cpu = NULL;
 
     cpu_synchronize_state(CPU(cpu));
@@ -1225,6 +1228,7 @@ static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
     /* get order code */
     order = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK;
     status_reg = &env->regs[r1];
+    param = (r1 % 2) ? env->regs[r1] : env->regs[r1 + 1];
 
     switch (order) {
     case SIGP_SET_ARCH:
@@ -1235,7 +1239,7 @@ static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
     default:
         /* all other sigp orders target a single vcpu */
         dst_cpu = s390_cpu_addr2state(env->regs[r3]);
-        ret = handle_sigp_single_dst(dst_cpu, order, status_reg);
+        ret = handle_sigp_single_dst(dst_cpu, order, param, status_reg);
     }
 
     if (ret >= 0) {