Allow silent system resets

This allows qemu_system_reset to be issued silently for internal
purposes, ie. without sending out a monitor event. Convert the system
reset after startup to the silent mode.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

sysemu.h

@@ -34,6 +34,9 @@ void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
 #define VMSTOP_LOADVM    7
 #define VMSTOP_MIGRATE   8
 
+#define VMRESET_SILENT   false
+#define VMRESET_REPORT   true
+
 void vm_start(void);
 void vm_stop(int reason);
 
@@ -50,7 +53,7 @@ int qemu_powerdown_requested(void);
 void qemu_system_killed(int signal, pid_t pid);
 void qemu_kill_report(void);
 extern qemu_irq qemu_system_powerdown;
-void qemu_system_reset(void);
+void qemu_system_reset(bool report);
 
 void qemu_add_exit_notifier(Notifier *notify);
 void qemu_remove_exit_notifier(Notifier *notify);

vl.c

@@ -1253,7 +1253,7 @@ void qemu_unregister_reset(QEMUResetHandler *func, void *opaque)
     }
 }
 
-void qemu_system_reset(void)
+void qemu_system_reset(bool report)
 {
     QEMUResetEntry *re, *nre;
 
@@ -1261,7 +1261,9 @@ void qemu_system_reset(void)
     QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) {
         re->func(re->opaque);
     }
-    monitor_protocol_event(QEVENT_RESET, NULL);
+    if (report) {
+        monitor_protocol_event(QEVENT_RESET, NULL);
+    }
     cpu_synchronize_all_post_reset();
 }
 
@@ -1403,7 +1405,7 @@ static void main_loop(void)
         if (qemu_reset_requested()) {
             pause_all_vcpus();
             cpu_synchronize_all_states();
-            qemu_system_reset();
+            qemu_system_reset(VMRESET_REPORT);
             resume_all_vcpus();
         }
         if (qemu_powerdown_requested()) {
@@ -3293,7 +3295,7 @@ int main(int argc, char **argv, char **envp)
     qemu_register_reset(qbus_reset_all_fn, sysbus_get_default());
     qemu_run_machine_init_done_notifiers();
 
-    qemu_system_reset();
+    qemu_system_reset(VMRESET_SILENT);
     if (loadvm) {
         if (load_vmstate(loadvm) < 0) {
             autostart = 0;

xen-all.c

@@ -452,7 +452,7 @@ static void cpu_handle_ioreq(void *opaque)
                 destroy_hvm_domain();
             }
             if (qemu_reset_requested_get()) {
-                qemu_system_reset();
+                qemu_system_reset(VMRESET_REPORT);
             }
         }