netdev - Re: [PATCH v5] vhost: introduce mdev based hardware backend

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Message-ID: <20191107052554.GA27721@___>
Date:   Thu, 7 Nov 2019 13:25:54 +0800
From:   Tiwei Bie <tiwei.bie@...el.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>, alex.williamson@...hat.com,
        maxime.coquelin@...hat.com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, dan.daly@...el.com,
        cunming.liang@...el.com, zhihong.wang@...el.com,
        lingshan.zhu@...el.com
Subject: Re: [PATCH v5] vhost: introduce mdev based hardware backend

On Thu, Nov 07, 2019 at 12:16:01PM +0800, Jason Wang wrote:
> On 2019/11/6 下午10:39, Tiwei Bie wrote:
> > On Wed, Nov 06, 2019 at 07:59:02AM -0500, Michael S. Tsirkin wrote:
> > > On Tue, Nov 05, 2019 at 07:53:32PM +0800, Tiwei Bie wrote:
> > > > This patch introduces a mdev based hardware vhost backend.
> > > > This backend is built on top of the same abstraction used
> > > > in virtio-mdev and provides a generic vhost interface for
> > > > userspace to accelerate the virtio devices in guest.
> > > > 
> > > > This backend is implemented as a mdev device driver on top
> > > > of the same mdev device ops used in virtio-mdev but using
> > > > a different mdev class id, and it will register the device
> > > > as a VFIO device for userspace to use. Userspace can setup
> > > > the IOMMU with the existing VFIO container/group APIs and
> > > > then get the device fd with the device name. After getting
> > > > the device fd, userspace can use vhost ioctls on top of it
> > > > to setup the backend.
> > > > 
> > > > Signed-off-by: Tiwei Bie <tiwei.bie@...el.com>
> > > So at this point, looks like the only thing missing is IFC, and then all
> > > these patches can go in.
> > > But as IFC is still being worked on anyway, it makes sense to
> > > address the minor comments manwhile so we don't need
> > > patches on top.
> > > Right?
> > Yeah, of course.
> > 
> > Thanks,
> > Tiwei
> 
> 
> Please send V6 and I will ack there.

Got it, I will send it soon.

Thanks!
Tiwei