Re: [PATCH 5/6] vdpa: introduce virtio pci driver

[Michael S. Tsirkin]

On Mon, Jun 08, 2020 at 05:46:52PM +0800, Jason Wang wrote:
> 
> On 2020/6/8 äå5:45, Michael S. Tsirkin wrote:
> > On Mon, Jun 08, 2020 at 05:43:58PM +0800, Jason Wang wrote:
> > > > > Looking at
> > > > > pci_match_one_device() it checks both subvendor and subdevice there.
> > > > > 
> > > > > Thanks
> > > > But IIUC there is no guarantee that driver with a specific subvendor
> > > > matches in presence of a generic one.
> > > > So either IFC or virtio pci can win, whichever binds first.
> > > 
> > > I'm not sure I get there. But I try manually bind IFCVF to qemu's
> > > virtio-net-pci, and it fails.
> > > 
> > > Thanks
> > Right but the reverse can happen: virtio-net can bind to IFCVF first.
> 
> 
> That's kind of expected. The PF is expected to be bound to virtio-pci to
> create VF via sysfs.
> 
> Thanks
> 
> 
> 

Once VFs are created, don't we want IFCVF to bind rather than
virtio-pci?

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MST