[Qemu-devel] [PATCH v5 7/8] hw/acpi: Add system power down support to GED

[Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>]

This adds support to use GED for system power down event.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 hw/acpi/generic_event_device.c         | 16 ++++++++++++++++
 include/hw/acpi/generic_event_device.h |  4 ++++
 2 files changed, 20 insertions(+)

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index 914fe64716..27c1bb40d4 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -20,6 +20,7 @@
 
 static const uint32_t ged_supported_events[] = {
     ACPI_GED_MEM_HOTPLUG_EVT,
+    ACPI_GED_PWR_DOWN_EVT,
 };
 
 /*
@@ -104,6 +105,11 @@ void build_ged_aml(Aml *table, const char *name, HotplugHandler *hotplug_dev,
                 aml_append(if_ctx, aml_call0(MEMORY_DEVICES_CONTAINER "."
                                              MEMORY_SLOT_SCAN_METHOD));
                 break;
+            case ACPI_GED_PWR_DOWN_EVT:
+                aml_append(if_ctx,
+                           aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
+                                      aml_int(0x80)));
+                break;
             default:
                 /*
                  * Please make sure all the events in ged_supported_events[]
@@ -228,6 +234,13 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
     acpi_ged_event(s, sel);
 }
 
+static void acpi_ged_pm_powerdown_req(Notifier *n, void *opaque)
+{
+    AcpiGedState *s = container_of(n, AcpiGedState, powerdown_notifier);
+
+    acpi_ged_event(s, ACPI_GED_PWR_DOWN_EVT);
+}
+
 static void acpi_ged_device_realize(DeviceState *dev, Error **errp)
 {
     AcpiGedState *s = ACPI_GED(dev);
@@ -239,6 +252,9 @@ static void acpi_ged_device_realize(DeviceState *dev, Error **errp)
     }
 
     acpi_ged_init(get_system_memory(), dev, &s->ged_state);
+
+    s->powerdown_notifier.notify = acpi_ged_pm_powerdown_req;
+    qemu_register_powerdown_notifier(&s->powerdown_notifier);
 }
 
 static Property acpi_ged_properties[] = {
diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
index f69d084c89..9e63b72cb9 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -61,6 +61,8 @@
 
 #include "hw/acpi/memory_hotplug.h"
 
+#define ACPI_POWER_BUTTON_DEVICE "PWRB"
+
 #define TYPE_ACPI_GED "acpi-ged"
 #define ACPI_GED(obj) \
     OBJECT_CHECK(AcpiGedState, (obj), TYPE_ACPI_GED)
@@ -79,6 +81,7 @@
  * through GED.
  */
 #define ACPI_GED_MEM_HOTPLUG_EVT   0x1
+#define ACPI_GED_PWR_DOWN_EVT      0x2
 
 typedef struct GEDState {
     MemoryRegion io;
@@ -88,6 +91,7 @@ typedef struct GEDState {
 
 typedef struct AcpiGedState {
     DeviceClass parent_obj;
+    Notifier powerdown_notifier;
     MemHotplugState memhp_state;
     hwaddr memhp_base;
     hwaddr ged_base;
-- 
2.17.1