On 2018年02月27日 17:03, Tiwei Bie wrote:
On Wed, Feb 14, 2018 at 10:37:09AM +0800, Jason Wang wrote: [...]+static void set_desc_used(struct vhost_virtqueue *vq, + struct vring_desc_packed *desc, bool wrap_counter) +{ + __virtio16 flags = desc->flags; + + if (wrap_counter) { + desc->flags |= cpu_to_vhost16(vq, DESC_AVAIL); + desc->flags |= cpu_to_vhost16(vq, DESC_USED); + } else { + desc->flags &= ~cpu_to_vhost16(vq, DESC_AVAIL); + desc->flags &= ~cpu_to_vhost16(vq, DESC_USED); + } + + desc->flags = flags;The `desc->flags` is restored after the change.
Right, will fix.
+} + +static int vhost_get_vq_desc_packed(struct vhost_virtqueue *vq, + struct iovec iov[], unsigned int iov_size, + unsigned int *out_num, unsigned int *in_num, + struct vhost_log *log, + unsigned int *log_num) +{ + struct vring_desc_packed desc; + int ret, access, i; + u16 avail_idx = vq->last_avail_idx; + + /* When we start there are none of either input nor output. */ + *out_num = *in_num = 0; + if (unlikely(log)) + *log_num = 0; + + do { + unsigned int iov_count = *in_num + *out_num; + + i = vq->last_avail_idx & (vq->num - 1);The queue size may not be a power of 2 in packed ring.
Will fix this too. Thanks
Best regards, Tiwei Bie
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