[RFC 00/27] Add VDUSE support to Vhost library

[Ferruh Yigit]

On 3/31/2023 4:42 PM, Maxime Coquelin wrote:
> This series introduces a new type of backend, VDUSE,
> to the Vhost library.
> 
> VDUSE stands for vDPA device in Userspace, it enables
> implementing a Virtio device in userspace and have it
> attached to the Kernel vDPA bus.
> 
> Once attached to the vDPA bus, it can be used either by
> Kernel Virtio drivers, like virtio-net in our case, via
> the virtio-vdpa driver. Doing that, the device is visible
> to the Kernel networking stack and is exposed to userspace
> as a regular netdev.
> 
> It can also be exposed to userspace thanks to the
> vhost-vdpa driver, via a vhost-vdpa chardev that can be
> passed to QEMU or Virtio-user PMD.
> 
> While VDUSE support is already available in upstream
> Kernel, a couple of patches are required to support
> network device type:
> 
> https://gitlab.com/mcoquelin/linux/-/tree/vduse_networking_poc
> 
> In order to attach the created VDUSE device to the vDPA
> bus, a recent iproute2 version containing the vdpa tool is
> required.

Hi Maxime,

Is this a replacement to the existing DPDK vDPA framework? What is the
plan for long term?