Hi Ferruh,
On 4/12/23 13:33, Ferruh Yigit wrote:
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?
No, this is not a replacement for DPDK vDPA framework.
We (Red Hat) don't have plans to support DPDK vDPA framework in our
products, but there are still contribution to DPDK vDPA by several vDPA
hardware vendors (Intel, Nvidia, Xilinx), so I don't think it is going
to be deprecated soon.
Regards,
Maxime
