How can I tell which virtqueue is which? I'm trying to make 2 virtqueues: 1) control vq between qemu and guest 2) data/job vq between vhost and guest
I went through find_vqs() inside the guest (virtio-net), but I can't tell how it associates which one is the rx queue, which one is tx, and which one is the control queue. Inside qemu-vhost module, when it sets the notifiers for vhost, I see that it only reaches the virtio-dev's bus, but I don't actually see it referencing/matching a virtio-dev queue with a vhost-dev queue(I don't see anything like set_notifiers(&vhost-dev.vq[i], &virtio-dev.vq[i]). I don't see how it manages NOT to install a notifier for the control virtqueue along with those for rx/tx virtqueues.
