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virtio: introduce __virtio_queue_reset()

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Separate the logic of vq reset. This logic will be called directly
later.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-2-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 17:25:44 +08:00 committed by Michael S. Tsirkin
parent e72cfabf4e
commit 3b43302c71
1 changed files with 21 additions and 16 deletions
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37
hw/virtio/virtio.c
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@ -2464,6 +2464,26 @@ static enum virtio_device_endian virtio_current_cpu_endian(void)
}
}
static void __virtio_queue_reset(VirtIODevice *vdev, uint32_t i)
{
vdev->vq[i].vring.desc = 0;
vdev->vq[i].vring.avail = 0;
vdev->vq[i].vring.used = 0;
vdev->vq[i].last_avail_idx = 0;
vdev->vq[i].shadow_avail_idx = 0;
vdev->vq[i].used_idx = 0;
vdev->vq[i].last_avail_wrap_counter = true;
vdev->vq[i].shadow_avail_wrap_counter = true;
vdev->vq[i].used_wrap_counter = true;
virtio_queue_set_vector(vdev, i, VIRTIO_NO_VECTOR);
vdev->vq[i].signalled_used = 0;
vdev->vq[i].signalled_used_valid = false;
vdev->vq[i].notification = true;
vdev->vq[i].vring.num = vdev->vq[i].vring.num_default;
vdev->vq[i].inuse = 0;
virtio_virtqueue_reset_region_cache(&vdev->vq[i]);
}
void virtio_reset(void *opaque)
{
VirtIODevice *vdev = opaque;
@ -2495,22 +2515,7 @@ void virtio_reset(void *opaque)
virtio_notify_vector(vdev, vdev->config_vector);
for(i = 0; i < VIRTIO_QUEUE_MAX; i++) {
vdev->vq[i].vring.desc = 0;
vdev->vq[i].vring.avail = 0;
vdev->vq[i].vring.used = 0;
vdev->vq[i].last_avail_idx = 0;
vdev->vq[i].shadow_avail_idx = 0;
vdev->vq[i].used_idx = 0;
vdev->vq[i].last_avail_wrap_counter = true;
vdev->vq[i].shadow_avail_wrap_counter = true;
vdev->vq[i].used_wrap_counter = true;
virtio_queue_set_vector(vdev, i, VIRTIO_NO_VECTOR);
vdev->vq[i].signalled_used = 0;
vdev->vq[i].signalled_used_valid = false;
vdev->vq[i].notification = true;
vdev->vq[i].vring.num = vdev->vq[i].vring.num_default;
vdev->vq[i].inuse = 0;
virtio_virtqueue_reset_region_cache(&vdev->vq[i]);
__virtio_queue_reset(vdev, i);
}
}