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+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2017 Wind River Systems, Inc.
+    All rights reserved.
+
+AVP Poll Mode Driver
+=================================================================
+
+The Accelerated Virtual Port (AVP) device is a shared memory based device
+only available on `virtualization platforms <http://www.windriver.com/products/titanium-cloud/>`_
+from Wind River Systems.  The Wind River Systems virtualization platform
+currently uses QEMU/KVM as its hypervisor and as such provides support for all
+of the QEMU supported virtual and/or emulated devices (e.g., virtio, e1000,
+etc.).  The platform offers the virtio device type as the default device when
+launching a virtual machine or creating a virtual machine port.  The AVP device
+is a specialized device available to customers that require increased
+throughput and decreased latency to meet the demands of their performance
+focused applications.
+
+The AVP driver binds to any AVP PCI devices that have been exported by the Wind
+River Systems QEMU/KVM hypervisor.  As a user of the DPDK driver API it
+supports a subset of the full Ethernet device API to enable the application to
+use the standard device configuration functions and packet receive/transmit
+functions.
+
+These devices enable optimized packet throughput by bypassing QEMU and
+delivering packets directly to the virtual switch via a shared memory
+mechanism.  This provides DPDK applications running in virtual machines with
+significantly improved throughput and latency over other device types.
+
+The AVP device implementation is integrated with the QEMU/KVM live-migration
+mechanism to allow applications to seamlessly migrate from one hypervisor node
+to another with minimal packet loss.
+
+
+Features and Limitations of the AVP PMD
+---------------------------------------
+
+The AVP PMD driver provides the following functionality.
+
+*   Receive and transmit of both simple and chained mbuf packets,
+
+*   Chained mbufs may include up to 5 chained segments,
+
+*   Up to 8 receive and transmit queues per device,
+
+*   Only a single MAC address is supported,
+
+*   The MAC address cannot be modified,
+
+*   The maximum receive packet length is 9238 bytes,
+
+*   VLAN header stripping and inserting,
+
+*   Promiscuous mode
+
+*   VM live-migration
+
+*   PCI hotplug insertion and removal
+
+
+Prerequisites
+-------------
+
+The following prerequisites apply:
+
+*   A virtual machine running in a Wind River Systems virtualization
+    environment and configured with at least one neutron port defined with a
+    vif-model set to "avp".
+
+
+Launching a VM with an AVP type network attachment
+--------------------------------------------------
+
+The following example will launch a VM with three network attachments.  The
+first attachment will have a default vif-model of "virtio".  The next two
+network attachments will have a vif-model of "avp" and may be used with a DPDK
+application which is built to include the AVP PMD driver.
+
+.. code-block:: console
+
+    nova boot --flavor small --image my-image \
+       --nic net-id=${NETWORK1_UUID} \
+       --nic net-id=${NETWORK2_UUID},vif-model=avp \
+       --nic net-id=${NETWORK3_UUID},vif-model=avp \
+       --security-group default my-instance1