Message-ID: <20191106120312.77a6a318@x1.home>
Date:   Wed, 6 Nov 2019 12:03:12 -0700
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org,
        intel-gvt-dev@...ts.freedesktop.org, kwankhede@...dia.com,
        mst@...hat.com, tiwei.bie@...el.com,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        cohuck@...hat.com, maxime.coquelin@...hat.com,
        cunming.liang@...el.com, zhihong.wang@...el.com,
        rob.miller@...adcom.com, xiao.w.wang@...el.com,
        haotian.wang@...ive.com, zhenyuw@...ux.intel.com,
        zhi.a.wang@...el.com, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com,
        airlied@...ux.ie, daniel@...ll.ch, farman@...ux.ibm.com,
        pasic@...ux.ibm.com, sebott@...ux.ibm.com, oberpar@...ux.ibm.com,
        heiko.carstens@...ibm.com, gor@...ux.ibm.com,
        borntraeger@...ibm.com, akrowiak@...ux.ibm.com,
        freude@...ux.ibm.com, lingshan.zhu@...el.com, idos@...lanox.com,
        eperezma@...hat.com, lulu@...hat.com, parav@...lanox.com,
        christophe.de.dinechin@...il.com, kevin.tian@...el.com,
        stefanha@...hat.com
Subject: Re: [PATCH V8 0/6] mdev based hardware virtio offloading support

On Wed, 6 Nov 2019 11:56:46 +0800
Jason Wang <jasowang@...hat.com> wrote:

> On 2019/11/6 上午1:58, Alex Williamson wrote:
> > On Tue,  5 Nov 2019 17:32:34 +0800
> > Jason Wang <jasowang@...hat.com> wrote:
> >  
> >> Hi all:
> >>
> >> There are hardwares that can do virtio datapath offloading while
> >> having its own control path. This path tries to implement a mdev based
> >> unified API to support using kernel virtio driver to drive those
> >> devices. This is done by introducing a new mdev transport for virtio
> >> (virtio_mdev) and register itself as a new kind of mdev driver. Then
> >> it provides a unified way for kernel virtio driver to talk with mdev
> >> device implementation.
> >>
> >> Though the series only contains kernel driver support, the goal is to
> >> make the transport generic enough to support userspace drivers. This
> >> means vhost-mdev[1] could be built on top as well by resuing the
> >> transport.
> >>
> >> A sample driver is also implemented which simulate a virito-net
> >> loopback ethernet device on top of vringh + workqueue. This could be
> >> used as a reference implementation for real hardware driver.
> >>
> >> Also a real ICF VF driver was also posted here[2] which is a good
> >> reference for vendors who is interested in their own virtio datapath
> >> offloading product.
> >>
> >> Consider mdev framework only support VFIO device and driver right now,
> >> this series also extend it to support other types. This is done
> >> through introducing class id to the device and pairing it with
> >> id_talbe claimed by the driver. On top, this seris also decouple
> >> device specific parents ops out of the common ones.
> >>
> >> Pktgen test was done with virito-net + mvnet loop back device.
> >>
> >> Please review.
> >>
> >> [1] https://lkml.org/lkml/2019/10/31/440
> >> [2] https://lkml.org/lkml/2019/10/15/1226
> >>
> >> Changes from V7:
> >> - drop {set|get}_mdev_features for virtio
> >> - typo and comment style fixes  
> >
> > Seems we're nearly there, all the remaining comments are relatively
> > superficial, though I would appreciate a v9 addressing them as well as
> > the checkpatch warnings:
> >
> > https://patchwork.freedesktop.org/series/68977/  
> 
> 
> Will do.
> 
> Btw, do you plan to merge vhost-mdev patch on top? Or you prefer it to 
> go through Michael's vhost tree?

I can include it if you wish.  The mdev changes are isolated enough in
that patch that I wouldn't presume it, but clearly it would require
less merge coordination to drop it in my tree.  Let me know.  Thanks,

Alex

Powered by blists - more mailing lists