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Subject: Re: [RFC virtio-dev] vhost-user-slave: add vhost-user slave device type
On Fri, Dec 15, 2017 at 05:05:19PM +0000, Stefan Hajnoczi wrote: > The vhost-user slave device facilitates vhost-user device emulation > through vhost-user protocol exchanges and access to shared memory. > Software-defined networking, storage, and other I/O appliances can > provide services through this device. > > This device is based on Wei Wang's vhost-pci work. The vhost-user slave > device differs from vhost-pci because it is a single virtio device type > that exposes the vhost-user protocol instead of a family of new virtio > device types, one for each vhost-user device type. > > This device supports vhost-user slave and vhost-user master > reconnection. It also contains a UUID so that vhost-user slave programs > can identify a specific device among many without using bus addresses. > > It is somewhat unconventional for a virtio device because it makes use > of additional resources called doorbells, notifications, and shared > memory. A mapping of these resources to the virtio PCI transport is > provided. Other transports, such as CCW may not be able to support > this device. HTML version here: https://stefanha.github.io/virtio/vhost-user-slave.html#x1-2830007
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