Re: [RFC PATCH v4 3/5] hw/vfio/ap: store object indicating AP config changed in a queue

[Anthony Krowiak <akrowiak@linux.ibm.com>]

On 3/11/25 11:16 AM, Rorie Reyes wrote:
> Creates an object indicating that an AP configuration change event
> has been received and stores it in a queue. These objects will later
> be used to store event information for an AP configuration change
> when the CHSC instruction is intercepted.
>
> Signed-off-by: Rorie Reyes <rreyes@linux.ibm.com>

Reviewed-by: Anthony Krowiak <krowiak@linux.ibm.com>

> ---
>   hw/vfio/ap.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
>
> diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
> index 3614657218..3fa986ca45 100644
> --- a/hw/vfio/ap.c
> +++ b/hw/vfio/ap.c
> @@ -41,6 +41,13 @@ struct VFIOAPDevice {
>       EventNotifier cfg_notifier;
>   };
>   
> +typedef struct APConfigChgEvent {
> +    QTAILQ_ENTRY(APConfigChgEvent) next;
> +} APConfigChgEvent;
> +
> +QTAILQ_HEAD(, APConfigChgEvent) cfg_chg_events =
> +    QTAILQ_HEAD_INITIALIZER(cfg_chg_events);
> +
>   OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE)
>   
>   static void vfio_ap_compute_needs_reset(VFIODevice *vdev)
> @@ -74,12 +81,17 @@ static void vfio_ap_req_notifier_handler(void *opaque)
>   
>   static void vfio_ap_cfg_chg_notifier_handler(void *opaque)
>   {
> +    APConfigChgEvent *cfg_chg_event;
>       VFIOAPDevice *vapdev = opaque;
>   
>       if (!event_notifier_test_and_clear(&vapdev->cfg_notifier)) {
>           return;
>       }
>   
> +    cfg_chg_event = g_new0(APConfigChgEvent, 1);
> +
> +    QTAILQ_INSERT_TAIL(&cfg_chg_events, cfg_chg_event, next);
> +
>       css_generate_css_crws(0);
>   
>   }