s390x: implement SIGP restart and shutdown

An s390x OS does reboot and shutdown triggers through hypercalls that
we didn't implement on the TCG backend yet. That means that so far we
couldn't shut down virtual machines for example, having them hang on
shutdown when not using KVM.

With this patch, this restriction is gone. We can now shut down and
reboot s390x virtual machines even when using the TCG backend.

Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c
index 364b1004e787149ea7d00f54a8f3d3c03784f0b7..137bae74a09a6c6c2b40aa065d05b20ff4c0f037 100644 (file)
--- a/target-s390x/op_helper.c
+++ b/target-s390x/op_helper.c
@@ -29,6 +29,10 @@
 #include <linux/kvm.h>
 #endif
 
+#if !defined (CONFIG_USER_ONLY)
+#include "sysemu.h"
+#endif
+
 /*****************************************************************************/
 /* Softmmu support */
 #if !defined (CONFIG_USER_ONLY)
@@ -2901,6 +2905,16 @@ uint32_t HELPER(sigp)(uint64_t order_code, uint32_t r1, uint64_t cpu_addr)
         env->regs[r1] &= 0xffffffff00000000ULL;
         cc = 1;
         break;
+#if !defined (CONFIG_USER_ONLY)
+    case SIGP_RESTART:
+        qemu_system_reset_request();
+        cpu_loop_exit(env);
+        break;
+    case SIGP_STOP:
+        qemu_system_shutdown_request();
+        cpu_loop_exit(env);
+        break;
+#endif
     default:
         /* unknown sigp */
         fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code);