kvm tools: Make keyboard termination go through regular termination path

Instead of exiting directly when a user enters 'ctrl x + a', go through
the regular termination path by stopping all VCPUs and letting the
main thread handle it.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

builtin-run.c

@@ -722,10 +722,11 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
 		exit_code = 1;
 
 	for (i = 1; i < nrcpus; i++) {
-		pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT);
-		if (pthread_join(kvm_cpus[i]->thread, &ret) != 0)
-			die("pthread_join");
-
+		if (kvm_cpus[i]->is_running) {
+			pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT);
+			if (pthread_join(kvm_cpus[i]->thread, &ret) != 0)
+				die("pthread_join");
+		}
 		if (ret != NULL)
 			exit_code = 1;
 	}

kvm-cpu.c

@@ -421,7 +421,11 @@ static void kvm_cpu__handle_coalesced_mmio(struct kvm_cpu *cpu)
 
 void kvm_cpu__reboot(void)
 {
-	pthread_kill(kvm_cpus[0]->thread, SIGKVMEXIT);
+	int i;
+
+	for (i = 0; i < KVM_NR_CPUS; i++)
+		if (kvm_cpus[i])
+			pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT);
 }
 
 int kvm_cpu__start(struct kvm_cpu *cpu)
@@ -442,7 +446,7 @@ int kvm_cpu__start(struct kvm_cpu *cpu)
 	if (cpu->kvm->single_step)
 		kvm_cpu__enable_singlestep(cpu);
 
-	for (;;) {
+	while (cpu->is_running) {
 		if (cpu->paused) {
 			kvm__notify_paused();
 			cpu->paused = 0;

term.c

@@ -34,12 +34,8 @@ int term_getc(int who)
 
 	if (term_got_escape) {
 		term_got_escape = false;
-		if (c == 'x') {
+		if (c == 'x')
 			kvm_cpu__reboot();
-			kvm__delete(kvm);
-			printf("\n  # KVM session terminated.\n");
-			exit(1);
-		}
 		if (c == term_escape_char)
 			return c;
 	}