Hi, It's been a while since I last gave an update. Sorry about that. I am ready to get my hands dirty and start with the implementation.
I have gone through the source of linux's drivers/virtio/virtio_ring.c [1], and QEMU's hw/virtio/virtio.c [2] and hw/virtio/vhost-shadow-virtqueue.c [3]. Before actually starting I would like to make sure I am on the right track. In vhost-shadow-virtqueue.c, there's a function "vhost_svq_add" which in turn calls "vhost_svq_add_split". Shall I start by implementing a mechanism to check if the feature bit "VIRTIO_F_RING_PACKED" is set (using "virtio_vdev_has_feature")? And if it's supported, "vhost_svq_add" should call "vhost_svq_add_packed". Following this, I can then start implementing "vhost_svq_add_packed" and progress from there. What are your thoughts on this? Thanks, Sahil [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/virtio/virtio.c [2] https://gitlab.com/qemu-project/qemu/-/blob/master/hw/virtio/virtio.c [3] https://gitlab.com/qemu-project/qemu/-/blob/master/hw/virtio/vhost-shadow-virtqueue.c
