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authorMichael S. Tsirkin <mst@redhat.com>2018-03-09 23:23:34 +0200
committerMichael S. Tsirkin <mst@redhat.com>2018-03-20 02:29:10 +0200
commit619a2785480f3275767b81a02cead33aaba4e801 (patch)
tree8f08fb037b5301e4b685541c7fbf9393039ae3a3 /split-ring.tex
parent323f8193da1c07cdea4677b92b7658f650554ffe (diff)
split-ring: generalize text
Update generic text to talk about available/used buffers, not rings. Move some split-ring specific text to the correct section. Update conformance section with link to the new conformance clause. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Approved-by: https://www.oasis-open.org/apps/org/workgroup/virtio/ballot.php?id=3177 Fixes: https://github.com/oasis-tcs/virtio-spec/issues/3
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diff --git a/split-ring.tex b/split-ring.tex
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--- a/split-ring.tex
+++ b/split-ring.tex
@@ -296,6 +296,10 @@ referred to this structure as vring_avail, and the constant as
VRING_AVAIL_F_NO_INTERRUPT, but the layout and value were identical.
\end{note}
+\drivernormative{\subsubsection}{The Virtqueue Available Ring}{Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Available Ring}
+A driver MUST NOT decrement the available \field{idx} on a virtqueue (ie.
+there is no way to ``unexpose'' buffers).
+
\subsection{Virtqueue Interrupt Suppression}\label{sec:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Interrupt Suppression}
If the VIRTIO_F_EVENT_IDX feature bit is not negotiated,