From bc36d14e13ee9bfc17a6818c5e1664fb8e316621 Mon Sep 17 00:00:00 2001 From: Rorie Reyes Date: Mon, 9 Jun 2025 12:44:16 -0400 Subject: [PATCH] hw/vfio/ap: store object indicating AP config changed in a queue MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Anthony Krowiak Link: https://lore.kernel.org/qemu-devel/20250609164418.17585-3-rreyes@linux.ibm.com Signed-off-by: Cédric Le Goater --- hw/vfio/ap.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 93c74ebedb9..681fd4a4f1c 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -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); } -- 2.47.2