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hw/vfio/ap: store object indicating AP config changed in a queue

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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 <akrowiak@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20250609164418.17585-3-rreyes@linux.ibm.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Rorie Reyes 2025-06-09 12:44:16 -04:00 • committed by Cédric Le Goater
parent 0fb8a62fe4
commit bc36d14e13
1 changed files with 17 additions and 0 deletions
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17
hw/vfio/ap.c
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@ -21,6 +21,7 @@
#include "hw/s390x/css.h"
#include "qemu/error-report.h"
#include "qemu/event_notifier.h"
#include "qemu/lockable.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qemu/option.h"
@ -41,6 +42,15 @@ struct VFIOAPDevice {
EventNotifier cfg_notifier;
};
typedef struct APConfigChgEvent {
QTAILQ_ENTRY(APConfigChgEvent) next;
} APConfigChgEvent;
static QTAILQ_HEAD(, APConfigChgEvent) cfg_chg_events =
QTAILQ_HEAD_INITIALIZER(cfg_chg_events);
static QemuMutex cfg_chg_events_lock;
OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE)
static void vfio_ap_compute_needs_reset(VFIODevice *vdev)
@ -74,12 +84,19 @@ 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);
WITH_QEMU_LOCK_GUARD(&cfg_chg_events_lock) {
QTAILQ_INSERT_TAIL(&cfg_chg_events, cfg_chg_event, next);
}
css_generate_css_crws(0);
}