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Subject: [PATCH v8 7/9] ccw: document ADMIN_VQ as reserved
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. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- content.tex | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/content.tex b/content.tex index 9c74fa9..7111929 100644 --- a/content.tex +++ b/content.tex @@ -2971,6 +2971,18 @@ \subsubsection{Resetting Devices}\label{sec:Virtio Transport Options / Virtio ov 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 MMIO / Features reserved for future use} + +At this time, devices and drivers utilizing Virtio over channel I/O +do not support the following features: +\begin{itemize} + +\item VIRTIO_F_ADMIN_VQ + +\end{itemize} + +These features are reserved for future use. + \chapter{Device Types}\label{sec:Device Types} On top of the queues, config space and feature negotiation facilities -- MST
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