diff options
| author | Eugenio Pérez <eperezma@redhat.com> | 2022-07-20 08:59:43 +0200 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2022-07-20 16:58:08 +0800 |
| commit | 2df4dd31e194c94da7d28c02e92449f4a989fca9 (patch) | |
| tree | 5bb87c15ad72591141ce63e357c6a7519c8d1af4 /qemu.sasl | |
| parent | bd907ae4b00ebedad5e586af05ea3d6490318d45 (diff) | |
vdpa: Buffer CVQ support on shadow virtqueue
Introduce the control virtqueue support for vDPA shadow virtqueue. This
is needed for advanced networking features like rx filtering.
Virtio-net control VQ copies the descriptors to qemu's VA, so we avoid
TOCTOU with the guest's or device's memory every time there is a device
model change. Otherwise, the guest could change the memory content in
the time between qemu and the device read it.
To demonstrate command handling, VIRTIO_NET_F_CTRL_MACADDR is
implemented. If the virtio-net driver changes MAC the virtio-net device
model will be updated with the new one, and a rx filtering change event
will be raised.
More cvq commands could be added here straightforwardly but they have
not been tested.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'qemu.sasl')
0 files changed, 0 insertions, 0 deletions