The docs describe IOMMU support for dpdkvhostuserclient ports,
but it is not mentioned in the section about dpdkvhostuser
ports. Add an explicit note to say IOMMU is not supported for
dpdkvhostuser ports.

CC: Maxime Coquelin <maxime.coque...@redhat.com>
Signed-off-by: Kevin Traynor <ktray...@redhat.com>
---

This patch is relevant for master and branch-2.9.

 Documentation/topics/dpdk/vhost-user.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/topics/dpdk/vhost-user.rst 
b/Documentation/topics/dpdk/vhost-user.rst
index 95517a6..8f20398 100644
--- a/Documentation/topics/dpdk/vhost-user.rst
+++ b/Documentation/topics/dpdk/vhost-user.rst
@@ -106,4 +106,7 @@ the guest. There are two ways to do this: using QEMU 
directly, or using
 libvirt.
 
+.. note::
+   IOMMU is not supported with vhost-user ports.
+
 Adding vhost-user ports to the guest (QEMU)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- 
1.8.3.1

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