RE: [PATCH v5 15/19] iommufd: vfio container FD ioctl compatibility

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> From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Sent: Friday, November 18, 2022 11:22 PM
> 
> On Fri, Nov 18, 2022 at 02:58:49AM +0000, Tian, Kevin wrote:
> > > From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> > > Sent: Thursday, November 17, 2022 5:01 AM
> > > index ca28a135b9675f..2fdff04000b326 100644
> > > --- a/drivers/iommu/iommufd/Makefile
> > > +++ b/drivers/iommu/iommufd/Makefile
> > > @@ -5,6 +5,7 @@ iommufd-y := \
> > >  	io_pagetable.o \
> > >  	ioas.o \
> > >  	main.o \
> > > -	pages.o
> > > +	pages.o \
> > > +	vfio_compat.o
> > >
> >
> > move vfio_compat out of core? it's not required if VFIO
> > is not configured.
> 
> We can, but I don't know if we should. Compat ioctls are part of
> /dev/iommu, and technically have nothing to do with VFIO. A native
> iommufd application using VDPA could use them, if it wanted, for
> instance.
> 

I'm not sure whether that requires further VDPA support. Be safe
I'd like VDPA to explicitly select vfio_compact when that new
mixed scheme is supported. 




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