[RFC,v2,3/5] hw/vfio/ap: store object indicating AP config changed in a queue

Commit Message

Rorie Reyes Feb. 4, 2025, 5:07 p.m. UTC

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 <[e-mail]>
---
 hw/vfio/ap.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

Patch

diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
index a2b3735349..396fcf87de 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)
@@ -75,11 +82,16 @@  static void vfio_ap_req_notifier_handler(void *opaque)
 static void vfio_ap_cfg_chg_notifier_handler(void *opaque)
 {
     VFIOAPDevice *vapdev = opaque;
+    APConfigChgEvent *cfg_chg_event = g_new0(APConfigChgEvent, 1);
 
     if (!event_notifier_test_and_clear(&vapdev->cfg_notifier)) {
-        css_generate_css_crws(0);
+        return;
     }
 
+    QTAILQ_INSERT_TAIL(&cfg_chg_events, cfg_chg_event, next);
+
+    css_generate_css_crws(0);
+
 }
 
 static bool vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev,