linux-kernel - Re: [PATCH RESEND V2] vdpa: introduce virtio pci driver

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Date:   Wed, 10 Jun 2020 02:21:13 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, rob.miller@...adcom.com,
        lingshan.zhu@...el.com, eperezma@...hat.com, lulu@...hat.com,
        shahafs@...lanox.com, hanand@...inx.com, mhabets@...arflare.com,
        gdawar@...inx.com, saugatm@...inx.com, vmireyno@...vell.com,
        zhangweining@...jie.com.cn, eli@...lanox.com
Subject: Re: [PATCH RESEND V2] vdpa: introduce virtio pci driver

On Wed, Jun 10, 2020 at 02:16:26PM +0800, Jason Wang wrote:
> 
> On 2020/6/10 下午2:07, Michael S. Tsirkin wrote:
> > On Wed, Jun 10, 2020 at 01:49:51PM +0800, Jason Wang wrote:
> > > This patch introduce a vDPA driver for virtio-pci device. It bridges
> > > the virtio-pci control command to the vDPA bus. This will be used for
> > > developing new features for both software vDPA framework and hardware
> > > vDPA feature.
> > > 
> > > Compared to vdpa_sim, it has several advantages:
> > > 
> > > - it's a real device driver which allow us to play with real hardware
> > >    features
> > > - type independent instead of networking specific
> > > 
> > > Note that since virtio specification does not support get/restore
> > > virtqueue state. So we can not use this driver for VM. This can be
> > > addressed by extending the virtio specification.
> > > 
> > > Consider the driver is mainly for testing and development for vDPA
> > > features, it can only be bound via dynamic ids to make sure it's not
> > > conflict with the drivers like virtio-pci or IFCVF.
> > > 
> > > Signed-off-by: Jason Wang<jasowang@...hat.com>
> > error: sha1 information is lacking or useless (drivers/vdpa/Kconfig).
> > 
> > which tree is this on top of?
> 
> 
> Your vhost.git vhost branch, HEAD is bbea3bcfd1d6 vdpa: fix typos in the
> comments for __vdpa_alloc_device()
> 
> Do I need to use other branch?
> 
> Thanks

No it's ok, I am just wondering why doesn't it apply then.

> 
> >