virtio — archive

[Michael S. Tsirkin <mst@redhat.com>]

Adding relevant registers needs more work and it's not clear what the use-case will be as currently only the PCI transport is supported. But let's keep the door open on this. We already say it's reserved in a central place, but it does not hurt to remind implementers to mask it. Note: there are more features to add to this list. Will be done later with a patch on top. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Parav Pandit <parav@nvidia.com> Reviewed-by: Zhu Lingshan <lingshan.zhu@intel.com> Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com> since v12: drop "at this time" comment by parav --- transport-ccw.tex 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/transport-ccw.tex b/transport-ccw.tex index c492cb9..d42ec7f 100644 --- a/transport-ccw.tex +++ b/transport-ccw.tex @@ -599,3 +599,15 @@ subsubsection{Resetting Devices}label{sec:Virtio Transport Options / Virtio ov successful conclusion of the CCW_CMD_VDEV_RESET channel command, although it MAY also choose to verify reset completion by reading field{device status} via CCW_CMD_READ_STATUS and checking whether it is 0 afterwards. + +subsection{Features reserved for future use}label{sec:Virtio Transport Options / Virtio over channel I/O / Features reserved for future use} + +Devices and drivers utilizing Virtio over channel I/O +do not support the following features: +egin{itemize} + +item VIRTIO_F_ADMIN_VQ + +end{itemize} + +These features are reserved for future use. -- MST