[virtio-dev] [PATCH v13 06/10] mmio: document ADMIN_VQ as reserved

Michael S. Tsirkin
2023-05-05T15:41:38Z

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>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>

---

changes in v12:
drop "as of now" to address comment by parav
---
transport-mmio.tex | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/transport-mmio.tex b/transport-mmio.tex
index f884a2c..5680fc4 100644
--- a/transport-mmio.tex
+++ b/transport-mmio.tex
@@ -562,3 +562,15 @@ \subsection{Legacy interface}\label{sec:Virtio Transport Options / Virtio Over M
\end{enumerate}

Notification mechanisms did not change.
+
+\subsection{Features reserved for future use}\label{sec:Virtio Transport Options / Virtio Over MMIO / Features reserved for future use}
+
+Devices and drivers utilizing Virtio Over MMIO
+do not support the following features:
+\begin{itemize}
+
+\item VIRTIO_F_ADMIN_VQ
+
+\end{itemize}
+
+These features are reserved for future use.