I've updated Spectrum's Cloud Hypervisor patches (which add virtio-gpu support) to reflect crosvm's recent renumbering[1] of some of the non-standard vhost-user protocol messages. [1]: https://chromium.googlesource.com/crosvm/crosvm/+/e428c4ba88a26695f63929c680b4101a9b8d5cbc More information is available at .