kvm tools: Free memory and FDs on exit

Following patch adds more cleanup code when exiting.
Close disk image, free msrs array and destroy the timer fd.

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

include/kvm/kvm.h

@@ -43,6 +43,7 @@ bool kvm__load_kernel(struct kvm *kvm, const char *kernel_filename,
 void kvm__reset_vcpu(struct kvm *self);
 void kvm__setup_bios(struct kvm *self);
 void kvm__start_timer(struct kvm *self);
+void kvm__stop_timer(struct kvm *self);
 void kvm__run(struct kvm *self);
 void kvm__irq_line(struct kvm *self, int irq, int level);
 bool kvm__emulate_io(struct kvm *self, uint16_t port, void *data, int direction, int size, uint32_t count);

kvm.c

@@ -105,6 +105,11 @@ static struct kvm *kvm__new(void)
 
 void kvm__delete(struct kvm *self)
 {
+	kvm__stop_timer(self);
+
+	if (self->msrs)
+		free(self->msrs);
+
 	free(self->ram_start);
 	free(self);
 }
@@ -612,6 +617,15 @@ void kvm__start_timer(struct kvm *self)
 		die("timer_settime()");
 }
 
+void kvm__stop_timer(struct kvm *self)
+{
+	if (self->timerid)
+		if (timer_delete(self->timerid) < 0)
+			die("timer_delete()");
+
+	self->timerid = 0;
+}
+
 void kvm__run(struct kvm *self)
 {
 	int err;

main.c

@@ -220,6 +220,7 @@ int main(int argc, char *argv[])
 		}
 	}
 exit_kvm:
+	disk_image__close(kvm->disk_image);
 	kvm__delete(kvm);
 
 	return 0;
@@ -230,6 +231,7 @@ panic_kvm:
 	if (kvm->kvm_run->exit_reason == KVM_EXIT_UNKNOWN)
 		fprintf(stderr, "KVM exit code: 0x%" PRIu64 "\n",
 			kvm->kvm_run->hw.hardware_exit_reason);
+	disk_image__close(kvm->disk_image);
 	kvm__show_registers(kvm);
 	kvm__show_code(kvm);
 	kvm__show_page_tables(kvm);