Re: [PATCH vfio 11/11] vfio/virtio: Introduce a vfio driver over virtio devices

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On Thu, Sep 21, 2023 at 11:11:25AM -0300, Jason Gunthorpe wrote:
> On Thu, Sep 21, 2023 at 09:16:21AM -0400, Michael S. Tsirkin wrote:
> 
> > > diff --git a/MAINTAINERS b/MAINTAINERS
> > > index bf0f54c24f81..5098418c8389 100644
> > > --- a/MAINTAINERS
> > > +++ b/MAINTAINERS
> > > @@ -22624,6 +22624,12 @@ L:	kvm@xxxxxxxxxxxxxxx
> > >  S:	Maintained
> > >  F:	drivers/vfio/pci/mlx5/
> > >  
> > > +VFIO VIRTIO PCI DRIVER
> > > +M:	Yishai Hadas <yishaih@xxxxxxxxxx>
> > > +L:	kvm@xxxxxxxxxxxxxxx
> > > +S:	Maintained
> > > +F:	drivers/vfio/pci/virtio
> > > +
> > >  VFIO PCI DEVICE SPECIFIC DRIVERS
> > >  R:	Jason Gunthorpe <jgg@xxxxxxxxxx>
> > >  R:	Yishai Hadas <yishaih@xxxxxxxxxx>
> > 
> > Tying two subsystems together like this is going to cause pain when
> > merging. God forbid there's something e.g. virtio net specific
> > (and there's going to be for sure) - now we are talking 3
> > subsystems.
> 
> Cross subsystem stuff is normal in the kernel.

Yea. But it's completely spurious here - virtio has its own way
to work with userspace which is vdpa and let's just use that.
Keeps things nice and contained.

> Drivers should be
> placed in their most logical spot - this driver exposes a VFIO
> interface so it belongs here.
> 
> Your exact argument works the same from the VFIO perspective, someone
> has to have code that belongs to them outside their little sphere
> here.
> 
> > Case in point all other virtio drivers are nicely grouped, have a common
> > mailing list etc etc.  This one is completely separate to the point
> > where people won't even remember to copy the virtio mailing list.
> 
> The virtio mailing list should probably be added to the maintainers
> enry
> 
> Jason

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