|.. SPDX-License-Identifier: GPL-2.0
|The failover module provides a generic interface for paravirtual drivers
|to register a netdev and a set of ops with a failover instance. The ops
|are used as event handlers that get called to handle netdev register/
|unregister/link change/name change events on slave pci ethernet devices
|with the same mac address as the failover netdev.
|This enables paravirtual drivers to use a VF as an accelerated low latency
|datapath. It also allows live migration of VMs with direct attached VFs by
|failing over to the paravirtual datapath when the VF is unplugged.