[RFC,v2,0/2] Vhost-vdpa Shadow Virtqueue _F_CTRL_RX_EXTRA commands support

Message

Hawkins Jiawei July 3, 2023, 6:50 a.m. UTC

This series enables shadowed CVQ to intercept rx commands related to
VIRTIO_NET_F_CTRL_RX_EXTRA feature through shadowed CVQ, update the virtio
NIC device model so qemu send it in a migration, and the restore of
that rx state in the destination.

To test this patch series, one should modify the `n->parent_obj.guest_features`
value in vhost_vdpa_net_load_rx() using gdb, as the linux virtio-net
driver does not currently support the VIRTIO_NET_F_CTRL_RX_EXTRA
feature.

Note that this patch should be based on [1], which has not
been merged yet. I will submit the new viersion patch after it is merged.

[1]. https://lists.nongnu.org/archive/html/qemu-devel/2023-06/msg06559.html

Changelog
=========
v2:
  - avoid sending CVQ command in default state suggested by Eugenio

v1: https://lists.nongnu.org/archive/html/qemu-devel/2023-06/msg04956.html

Hawkins Jiawei (2):
  vdpa: Restore packet receive filtering state relative with
    _F_CTRL_RX_EXTRA feature
  vdpa: Allow VIRTIO_NET_F_CTRL_RX_EXTRA in SVQ

 net/vhost-vdpa.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)