[PATCH 4/4] docs: documentation for virtio packed option

[Bjoern Walk <bwalk@xxxxxxxxxxxxx>]

Reviewed-by: Boris Fiuczynski <fiuczy@xxxxxxxxxxxxx>
Signed-off-by: Bjoern Walk <bwalk@xxxxxxxxxxxxx>
---
 docs/formatdomain.html.in | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index fb07d107..f8bfef7d 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -4321,6 +4321,14 @@
       Possible values are <code>on</code> or <code>off</code>.
       <span class="since">Since 3.5.0</span>
     </p>
+    <p>
+      The attribute <code>packed</code> controls the usage of packed
+      virtqueues. Compared to regular split queues, packed queues consist of
+      only a single descriptor ring replacing available and used ring, index
+      and descriptor buffer. This can result in better cache utilization and
+      performance. Possible values are <code>on</code> or <code>off</code>.
+      <span class="since">Since 6.3.0 (QEMU and KVM only)</span>
+    </p>
 
     <h4><a id="elementsVirtioTransitional">Virtio transitional devices</a></h4>
 
-- 
2.24.1