Hi Junjie, On 12/13/2017 05:50 PM, Junjie Chen wrote:
This fix dequeue zero copy can not work with Qemu version >= 2.7. Since from Qemu 2.7 virtio device use virtio-1 protocol, the zero copy code path forget to add offset to buffer address.Signed-off-by: Junjie Chen <junjie.j.c...@intel.com> --- lib/librte_vhost/virtio_net.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index 6fee16e..79d80f7 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -977,7 +977,8 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, desc->addr + desc_offset, cpy_len)))) { cur->data_len = cpy_len; cur->data_off = 0; - cur->buf_addr = (void *)(uintptr_t)desc_addr; + cur->buf_addr = (void *)(uintptr_t)(desc_addr + + desc_offset); cur->buf_iova = hpa;/*
Thanks for fixing this. Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com> Maxime
