[PATCH V2 2/2] virtio-pci: implement VIRTIO_F_QUEUE_STATE

[Jason Wang <jasowang@redhat.com>]

This patch adds two new le16 fields to common configruation structure
to support VIRTIO_F_QUEUE_STATE.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 content.tex | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/content.tex b/content.tex
index af39111..adfc279 100644
--- a/content.tex
+++ b/content.tex
@@ -914,6 +914,8 @@ \subsubsection{Common configuration structure layout}\label{sec:Virtio Transport
         le64 queue_driver;              /* read-write */
         le64 queue_device;              /* read-write */
         le16 queue_notify_data;         /* read-only for driver */
+        le16 queue_avail_state;         /* read-write */
+        le16 queue_used_state;          /* read-write */
 };
 \end{lstlisting}
 
@@ -993,6 +995,16 @@ \subsubsection{Common configuration structure layout}\label{sec:Virtio Transport
         may benefit from providing another value, for example an internal virtqueue
         identifier, or an internal offset related to the virtqueue number.
         \end{note}
+
+\item[\field{queue_avail_state}]
+        This field exists only if VIRTIO_F_QUEUE_STATE has been
+        negotiated. The driver sets and gets the available state of
+        the virtqueue here (see \ref{sec:Virtqueues / Virtqueue State}).
+
+\item[\field{queue_used_state}]
+        This field exists only if VIRTIO_F_QUEUE_STATE has been
+        negotiated. The driver sets and gets the used state of the
+        virtqueue here (see \ref{sec:Virtqueues / Virtqueue State}).
 \end{description}
 
 \devicenormative{\paragraph}{Common configuration structure layout}{Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Common configuration structure layout}
-- 
2.24.3 (Apple Git-128)