[RFC V3 PATCH 05/13] acpi: Send the GPE event of suspend and wakeup for x86

[Annie Li]

The GPE event is triggered to notify x86 guest to suppend
itself. The function acpi_send_sleep_event will also
trigger GED events on HW-reduced systems where ACPI GED
sleep event is supported.

Signed-off-by: Annie Li <annie...@oracle.com>
---
 hw/acpi/core.c                       | 10 ++++++++++
 include/hw/acpi/acpi.h               |  1 +
 include/hw/acpi/acpi_dev_interface.h |  1 +
 3 files changed, 12 insertions(+)

diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 58f8964e13..00a9d226f0 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -359,6 +359,16 @@ int acpi_get_slic_oem(AcpiSlicOem *oem)
     return -1;
 }
 
+void acpi_send_sleep_event(void)
+{
+    Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL);
+
+    if (obj) {
+        /* Send sleep event */
+        acpi_send_event(DEVICE(obj), ACPI_SLEEP_STATUS);
+    }
+}
+
 static void acpi_notify_wakeup(Notifier *notifier, void *data)
 {
     ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);
diff --git a/include/hw/acpi/acpi.h b/include/hw/acpi/acpi.h
index d1a4fa2af8..64d3ff78ed 100644
--- a/include/hw/acpi/acpi.h
+++ b/include/hw/acpi/acpi.h
@@ -184,6 +184,7 @@ uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr);
 
 void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
                          AcpiEventStatusBits status);
+void acpi_send_sleep_event(void);
 
 void acpi_update_sci(ACPIREGS *acpi_regs, qemu_irq irq);
 
diff --git a/include/hw/acpi/acpi_dev_interface.h 
b/include/hw/acpi/acpi_dev_interface.h
index 68d9d15f50..1cb050cd3a 100644
--- a/include/hw/acpi/acpi_dev_interface.h
+++ b/include/hw/acpi/acpi_dev_interface.h
@@ -13,6 +13,7 @@ typedef enum {
     ACPI_NVDIMM_HOTPLUG_STATUS = 16,
     ACPI_VMGENID_CHANGE_STATUS = 32,
     ACPI_POWER_DOWN_STATUS = 64,
+    ACPI_SLEEP_STATUS = 128,
 } AcpiEventStatusBits;
 
 #define TYPE_ACPI_DEVICE_IF "acpi-device-interface"
-- 
2.43.5