fn create_virtio_devices(
cfg: &Config,
vm: &mut impl VmArch,
resources: &mut SystemAllocator,
add_control_tube: &mut impl FnMut(AnyControlTube),
vm_evt_wrtube: &SendTube,
balloon_inflate_tube: Option<Tube>,
worker_process_pids: &mut BTreeSet<Pid>,
render_server_fd: Option<SafeDescriptor>,
has_vfio_gfx_device: bool,
registered_evt_q: &SendTube
) -> Result<Vec<VirtioDeviceStub>>