Re: [RFC PATCH v9 2/4] hw/vfio/ap: store object indicating AP config changed in a queue

[Anthony Krowiak]

On 5/12/25 2:02 PM, 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 <rre...@linux.ibm.com>

Reviewed-by: Anthony Krowiak <akrow...@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 3d0af7a54a..5ea5dd9cca 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);

}