Allows guests to be powered off via an ACPI power button event which can be
triggered e.g. through the GTK GUI.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
---
 hw/isa/vt82c686.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
index 7b44ad9485..e8ec63dea9 100644
--- a/hw/isa/vt82c686.c
+++ b/hw/isa/vt82c686.c
@@ -33,8 +33,10 @@
 #include "qapi/error.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
+#include "qemu/notify.h"
 #include "qemu/range.h"
 #include "qemu/timer.h"
+#include "sysemu/runstate.h"
 #include "trace.h"
 
 #define TYPE_VIA_PM "via-pm"
@@ -52,6 +54,8 @@ struct ViaPMState {
     APMState apm;
     PMSMBus smb;
 
+    Notifier powerdown_notifier;
+
     qemu_irq sci_irq;
 };
 
@@ -172,6 +176,13 @@ static void via_pm_reset(DeviceState *d)
     smb_io_space_update(s);
 }
 
+static void via_pm_powerdown_req(Notifier *n, void *opaque)
+{
+    ViaPMState *s = container_of(n, ViaPMState, powerdown_notifier);
+
+    acpi_pm1_evt_power_down(&s->ar);
+}
+
 static void via_pm_realize(PCIDevice *dev, Error **errp)
 {
     ViaPMState *s = VIA_PM(dev);
@@ -193,6 +204,9 @@ static void via_pm_realize(PCIDevice *dev, Error **errp)
     acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
     acpi_pm1_cnt_init(&s->ar, &s->io, false, false, 2, false);
     acpi_gpe_init(&s->ar, VIA_PM_GPE_LEN);
+
+    s->powerdown_notifier.notify = via_pm_powerdown_req;
+    qemu_register_powerdown_notifier(&s->powerdown_notifier);
 }
 
 static void via_pm_init(Object *obj)
-- 
2.42.0