On Wed, 28 May 2025 12:39:52 -0400
Annie Li <annie...@oracle.com> wrote:
> The GPE event is triggered to notify x86 guest to sleep
> 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 | 12 ++++++++++++
> include/hw/acpi/acpi.h | 1 +
> include/hw/acpi/acpi_dev_interface.h | 1 +
> 3 files changed, 14 insertions(+)
>
> diff --git a/hw/acpi/core.c b/hw/acpi/core.c
> index 58f8964e13..dcabe881bf 100644
> --- a/hw/acpi/core.c
> +++ b/hw/acpi/core.c
> @@ -359,6 +359,18 @@ int acpi_get_slic_oem(AcpiSlicOem *oem)
> return -1;
> }
>
> +void acpi_send_sleep_event(void)
> +{
> + bool ambiguous;
> + Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF,
> &ambiguous);
> +
> + assert(!ambiguous);
> + if (obj) {
Can it ever be NULL?
If not drop condition.
> + /* 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"
