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virtio: introduce virtio_queue_reset()

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Introduce a new interface function virtio_queue_reset() to implement
reset for vq.

Add a new callback to VirtioDeviceClass for queue reset operation for
each child device.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-3-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xuan Zhuo 2022-10-17 17:25:45 +08:00 committed by Michael S. Tsirkin
parent 3b43302c71
commit b3a8d6f431
2 changed files with 13 additions and 0 deletions
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11
hw/virtio/virtio.c
View file

@ -2484,6 +2484,17 @@ static void __virtio_queue_reset(VirtIODevice *vdev, uint32_t i)
virtio_virtqueue_reset_region_cache(&vdev->vq[i]);
}
void virtio_queue_reset(VirtIODevice *vdev, uint32_t queue_index)
{
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
if (k->queue_reset) {
k->queue_reset(vdev, queue_index);
}
__virtio_queue_reset(vdev, queue_index);
}
void virtio_reset(void *opaque)
{
VirtIODevice *vdev = opaque;

2
include/hw/virtio/virtio.h
View file

@ -148,6 +148,7 @@ struct VirtioDeviceClass {
void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
void (*reset)(VirtIODevice *vdev);
void (*set_status)(VirtIODevice *vdev, uint8_t val);
void (*queue_reset)(VirtIODevice *vdev, uint32_t queue_index);
/* For transitional devices, this is a bitmap of features
* that are only exposed on the legacy interface but not
* the modern one.
@ -286,6 +287,7 @@ int virtio_queue_set_host_notifier_mr(VirtIODevice *vdev, int n,
MemoryRegion *mr, bool assign);
int virtio_set_status(VirtIODevice *vdev, uint8_t val);
void virtio_reset(void *opaque);
void virtio_queue_reset(VirtIODevice *vdev, uint32_t queue_index);
void virtio_update_irq(VirtIODevice *vdev);
int virtio_set_features(VirtIODevice *vdev, uint64_t val);