Reviewed-by: Raphael Norwitz <raphael.s.norwitz@gmail.com>
On Sat, Oct 11, 2025 at 7:24 PM Vladimir Sementsov-Ogievskiy
<vsementsov@yandex-team.ru> wrote:
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
> ---
> hw/virtio/trace-events | 12 ++++++++++--
> hw/virtio/vhost.c | 20 ++++++++++++++++++--
> 2 files changed, 28 insertions(+), 4 deletions(-)
>
> diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
> index aa1ffa5e94..c2529814f9 100644
> --- a/hw/virtio/trace-events
> +++ b/hw/virtio/trace-events
> @@ -9,8 +9,16 @@ vhost_section(const char *name) "%s"
> vhost_reject_section(const char *name, int d) "%s:%d"
> vhost_iotlb_miss(void *dev, int step) "%p step %d"
> vhost_dev_cleanup(void *dev) "%p"
> -vhost_dev_start(void *dev, const char *name, bool vrings) "%p:%s vrings:%d"
> -vhost_dev_stop(void *dev, const char *name, bool vrings) "%p:%s vrings:%d"
> +vhost_dev_start_in(void *dev, const char *name, bool vrings) "%p:%s vrings:%d"
> +vhost_dev_start_out(void *dev, const char *name) "%p:%s"
> +vhost_dev_stop_in(void *dev, const char *name, bool vrings) "%p:%s vrings:%d"
> +vhost_dev_stop_out(void *dev, const char *name) "%p:%s"
> +vhost_virtque_start_in(void *dev, const char *name, int idx) "%p:%s %d"
> +vhost_virtque_start_out(void *dev, const char *name, int idx) "%p:%s %d"
> +vhost_virtque_stop_in(void *dev, const char *name, int idx) "%p:%s %d"
> +vhost_virtque_stop_out(void *dev, const char *name, int idx) "%p:%s %d"
> +vhost_dev_init_in(void *dev) "%p"
> +vhost_dev_init_out(void *dev) "%p"
>
>
> # vhost-user.c
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index d02d1d4c34..f15ef8cff6 100644
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -1333,6 +1333,8 @@ int vhost_virtqueue_start(struct vhost_dev *dev,
> };
> struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
>
> + trace_vhost_virtque_start_in(dev, vdev->name, idx);
> +
> r = vhost_vrings_map(dev, vdev, vq, idx);
> if (r <= 0) {
> return r;
> @@ -1394,6 +1396,8 @@ int vhost_virtqueue_start(struct vhost_dev *dev,
> }
> }
>
> + trace_vhost_virtque_start_out(dev, vdev->name, idx);
> +
> return 0;
>
> fail:
> @@ -1412,6 +1416,8 @@ static int do_vhost_virtqueue_stop(struct vhost_dev *dev,
> };
> int r = 0;
>
> + trace_vhost_virtque_stop_in(dev, vdev->name, idx);
> +
> if (virtio_queue_get_desc_addr(vdev, idx) == 0) {
> /* Don't stop the virtqueue which might have not been started */
> return 0;
> @@ -1445,6 +1451,8 @@ static int do_vhost_virtqueue_stop(struct vhost_dev *dev,
> }
>
> vhost_vrings_unmap(dev, vq, true);
> +
> + trace_vhost_virtque_stop_out(dev, vdev->name, idx);
> return r;
> }
>
> @@ -1616,6 +1624,8 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
> {
> int i, r, n_initialized_vqs = 0;
>
> + trace_vhost_dev_init_in(hdev);
> +
> hdev->vdev = NULL;
> hdev->migration_blocker = NULL;
>
> @@ -1700,6 +1710,8 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
> goto fail;
> }
>
> + trace_vhost_dev_init_out(hdev);
> +
> return 0;
>
> fail:
> @@ -2048,7 +2060,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev, bool vrings)
> /* should only be called after backend is connected */
> assert(hdev->vhost_ops);
>
> - trace_vhost_dev_start(hdev, vdev->name, vrings);
> + trace_vhost_dev_start_in(hdev, vdev->name, vrings);
>
> vdev->vhost_started = true;
> hdev->started = true;
> @@ -2133,6 +2145,8 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev, bool vrings)
> }
> }
> vhost_start_config_intr(hdev);
> +
> + trace_vhost_dev_start_out(hdev, vdev->name);
> return 0;
> fail_iotlb:
> if (vhost_dev_has_iommu(hdev) &&
> @@ -2182,7 +2196,7 @@ static int do_vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev,
> event_notifier_cleanup(
> &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier);
>
> - trace_vhost_dev_stop(hdev, vdev->name, vrings);
> + trace_vhost_dev_stop_in(hdev, vdev->name, vrings);
>
> if (hdev->vhost_ops->vhost_dev_start) {
> hdev->vhost_ops->vhost_dev_start(hdev, false);
> @@ -2212,6 +2226,8 @@ static int do_vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev,
> hdev->started = false;
> vdev->vhost_started = false;
> hdev->vdev = NULL;
> +
> + trace_vhost_dev_stop_out(hdev, vdev->name);
> return rc;
> }
>
> --
> 2.48.1
>