From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Wed, 23 Nov 2022 16:08:24 -0500 From: "Michael S. Tsirkin" Subject: [PATCH v9 07/10] ccw: document ADMIN_VQ as reserved Message-ID: <20221123210706.21476-8-mst@redhat.com> References: <20221123210706.21476-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20221123210706.21476-1-mst@redhat.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline To: virtio-comment@lists.oasis-open.org, virtio-dev@lists.oasis-open.org, jasowang@redhat.com, mst@redhat.com, cohuck@redhat.com, sgarzare@redhat.com, stefanha@redhat.com, nrupal.jani@intel.com, Piotr.Uminski@intel.com, hang.yuan@intel.com Cc: virtio@lists.oasis-open.org, Zhu Lingshan , pasic@linux.ibm.com, Shahaf Shuler , Parav Pandit , Max Gurtovoy List-ID: 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 --- content.tex | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/content.tex b/content.tex index 023f9b9..6c3758d 100644 --- a/content.tex +++ b/content.tex @@ -2976,6 +2976,18 @@ \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 channel I/O / 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