@@ -39,6 +39,9 @@ void vm_stop(RunState state);
void vm_stop_force_state(RunState state);
void qemu_system_reset_request(void);
+void qemu_system_suspend_request(void);
+void qemu_register_suspend_notifier(Notifier *notifier);
+void qemu_system_wakeup_request(void);
void qemu_system_shutdown_request(void);
void qemu_system_powerdown_request(void);
void qemu_system_debug_request(void);
@@ -1282,6 +1282,9 @@ static int shutdown_requested, shutdown_signal = -1;
static pid_t shutdown_pid;
static int powerdown_requested;
static int debug_requested;
+static bool is_suspended;
+static NotifierList suspend_notifiers =
+ NOTIFIER_LIST_INITIALIZER(suspend_notifiers);
static RunState vmstop_requested = RUN_STATE_MAX;
int qemu_shutdown_requested_get(void)
@@ -1397,6 +1400,31 @@ void qemu_system_reset_request(void)
qemu_notify_event();
}
+void qemu_system_suspend_request(void)
+{
+ if (is_suspended) {
+ return;
+ }
+ cpu_stop_current();
+ notifier_list_notify(&suspend_notifiers, NULL);
+ is_suspended = true;
+}
+
+void qemu_register_suspend_notifier(Notifier *notifier)
+{
+ notifier_list_add(&suspend_notifiers, notifier);
+}
+
+void qemu_system_wakeup_request(void)
+{
+ if (!is_suspended) {
+ return;
+ }
+ reset_requested = 1;
+ qemu_notify_event();
+ is_suspended = false;
+}
+
void qemu_system_killed(int signal, pid_t pid)
{
shutdown_signal = signal;
This patch adds some infrastructure to handle suspend and resume to qemu. First there are two functions to switch state and second there is a suspend notifier: * qemu_system_suspend_request() is supposed to be called when the guest asks for being be suspended, for example via ACPI. * qemu_system_wakeup_request is supposed to be called on events which should wake up the guest. * qemu_register_suspend_notifier can be used to register a notifier which will be called when the guest is suspended. Machine types and device models can hook in there to modify state if needed. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- sysemu.h | 3 +++ vl.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 0 deletions(-)