add cpu_is_stopped helper

Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

cpu-all.h

@@ -821,6 +821,7 @@ void cpu_watchpoint_remove_all(CPUState *env, int mask);
 
 void cpu_single_step(CPUState *env, int enabled);
 void cpu_reset(CPUState *s);
+int cpu_is_stopped(CPUState *env);
 void run_on_cpu(CPUState *env, void (*func)(void *data), void *data);
 
 #define CPU_LOG_TB_OUT_ASM (1 << 0)

cpus.c

@@ -91,6 +91,11 @@ void cpu_synchronize_all_post_init(void)
     }
 }
 
+int cpu_is_stopped(CPUState *env)
+{
+    return !vm_running || env->stopped;
+}
+
 static void do_vm_stop(int reason)
 {
     if (vm_running) {