netdev - Re: [PATCH v1 0/2] vduse: add support for networking devices

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Date: Mon, 3 Jul 2023 15:44:53 +0800
From: Jason Wang <jasowang@...hat.com>
To: Maxime Coquelin <maxime.coquelin@...hat.com>
Cc: "Michael S. Tsirkin" <mst@...hat.com>, xieyongji@...edance.com, david.marchand@...hat.com, 
	lulu@...hat.com, linux-kernel@...r.kernel.org, 
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, 
	xuanzhuo@...ux.alibaba.com, eperezma@...hat.com
Subject: Re: [PATCH v1 0/2] vduse: add support for networking devices

On Mon, Jul 3, 2023 at 3:43 PM Maxime Coquelin
<maxime.coquelin@...hat.com> wrote:
>
>
> On 7/3/23 08:44, Jason Wang wrote:
> > On Sun, Jul 2, 2023 at 9:37 PM Michael S. Tsirkin <mst@...hat.com> wrote:
> >>
> >> On Tue, Jun 27, 2023 at 01:36:50PM +0200, Maxime Coquelin wrote:
> >>> This small series enables virtio-net device type in VDUSE.
> >>> With it, basic operation have been tested, both with
> >>> virtio-vdpa and vhost-vdpa using DPDK Vhost library series
> >>> adding VDUSE support using split rings layout (merged in
> >>> DPDK v23.07-rc1).
> >>>
> >>> Control queue support (and so multiqueue) has also been
> >>> tested, but requires a Kernel series from Jason Wang
> >>> relaxing control queue polling [1] to function reliably.
> >>>
> >>> [1]: https://lore.kernel.org/lkml/CACGkMEtgrxN3PPwsDo4oOsnsSLJfEmBEZ0WvjGRr3whU+QasUg@mail.gmail.com/T/
> >>
> >> Jason promised to post a new version of that patch.
> >> Right Jason?
> >
> > Yes.
> >
> >> For now let's make sure CVQ feature flag is off?
> >
> > We can do that and relax on top of my patch.
>
> I agree? Do you prefer a features negotiation, or failing init (like
> done for VERSION_1) if the VDUSE application advertises CVQ?

Assuming we will relax it soon, I think we can choose the easier way.
I guess it's just failing.

Thanks

>
> Thanks,
> Maxime
>
> > Thanks
> >
> >>
> >>> RFC -> v1 changes:
> >>> ==================
> >>> - Fail device init if it does not support VERSION_1 (Jason)
> >>>
> >>> Maxime Coquelin (2):
> >>>    vduse: validate block features only with block devices
> >>>    vduse: enable Virtio-net device type
> >>>
> >>>   drivers/vdpa/vdpa_user/vduse_dev.c | 15 +++++++++++----
> >>>   1 file changed, 11 insertions(+), 4 deletions(-)
> >>>
> >>> --
> >>> 2.41.0
> >>
> >
>