This patch adds missing 'client' devarg documentation and
improve other devargs.

Bugzilla ID: 1603

Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 doc/guides/nics/vhost.rst | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/doc/guides/nics/vhost.rst b/doc/guides/nics/vhost.rst
index 39c6fcff58..0013dc526f 100644
--- a/doc/guides/nics/vhost.rst
+++ b/doc/guides/nics/vhost.rst
@@ -32,13 +32,18 @@ The user can specify below arguments in `--vdev` option.
 
 #.  ``iface``:
 
-    It is used to specify a path to connect to a QEMU virtio-net device.
+    It is used to specify a path to connect to a Vhost-user frontend or VDUSE 
device.
 
 #.  ``queues``:
 
-    It is used to specify the number of queues virtio-net device has.
+    It is used to specify the number of queue pairs virtio-net device has.
     (Default: 1)
 
+#.  ``client``:
+
+   It is used to specify whether the Vhost PMD acts as client or server.
+   (Default: 0 (server))
+
 #.  ``iommu-support``:
 
     It is used to enable iommu support in vhost library.
-- 
2.47.0

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