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vdpa: Add virtio-net mac address via CVQ at start 

This is needed so the destination vdpa device see the same state a the
guest set in the source.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Eugenio Pérez 2022-08-23 20:30:36 +02:00 committed by Jason Wang
parent 539573c317
commit dd036d8d27
1 changed files with 40 additions and 0 deletions
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40
net/vhost-vdpa.c
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@ -363,11 +363,51 @@ static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len,
return vhost_svq_poll(svq);
}
static int vhost_vdpa_net_load(NetClientState *nc)
{
VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
const struct vhost_vdpa *v = &s->vhost_vdpa;
const VirtIONet *n;
uint64_t features;
assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
if (!v->shadow_vqs_enabled) {
return 0;
}
n = VIRTIO_NET(v->dev->vdev);
features = n->parent_obj.guest_features;
if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) {
const struct virtio_net_ctrl_hdr ctrl = {
.class = VIRTIO_NET_CTRL_MAC,
.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET,
};
char *cursor = s->cvq_cmd_out_buffer;
ssize_t dev_written;
memcpy(cursor, &ctrl, sizeof(ctrl));
cursor += sizeof(ctrl);
memcpy(cursor, n->mac, sizeof(n->mac));
dev_written = vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + sizeof(n->mac),
sizeof(virtio_net_ctrl_ack));
if (unlikely(dev_written < 0)) {
return dev_written;
}
return *((virtio_net_ctrl_ack *)s->cvq_cmd_in_buffer) != VIRTIO_NET_OK;
}
return 0;
}
static NetClientInfo net_vhost_vdpa_cvq_info = {
.type = NET_CLIENT_DRIVER_VHOST_VDPA,
.size = sizeof(VhostVDPAState),
.receive = vhost_vdpa_receive,
.start = vhost_vdpa_net_cvq_start,
.load = vhost_vdpa_net_load,
.stop = vhost_vdpa_net_cvq_stop,
.cleanup = vhost_vdpa_cleanup,
.has_vnet_hdr = vhost_vdpa_has_vnet_hdr,