Introduce device parts access commands via the admin queue. These commands and their structure adhere to the Virtio 1.4 specification. Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20241113115200.209269-2-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>