Re: [PATCH v7 03/10] iommu/sva: Add iommu_sva_domain support

[Jason Gunthorpe]

On Wed, May 25, 2022 at 01:19:08PM +0800, Baolu Lu wrote:
> Hi Jason,
> 
> On 2022/5/24 21:44, Jason Gunthorpe wrote:
> > > diff --git a/drivers/iommu/iommu-sva-lib.c b/drivers/iommu/iommu-sva-lib.c
> > > index 106506143896..210c376f6043 100644
> > > +++ b/drivers/iommu/iommu-sva-lib.c
> > > @@ -69,3 +69,51 @@ struct mm_struct *iommu_sva_find(ioasid_t pasid)
> > >   	return ioasid_find(&iommu_sva_pasid, pasid, __mmget_not_zero);
> > >   }
> > >   EXPORT_SYMBOL_GPL(iommu_sva_find);
> > > +
> > > +/*
> > > + * IOMMU SVA driver-oriented interfaces
> > > + */
> > > +struct iommu_domain *
> > > +iommu_sva_alloc_domain(struct bus_type *bus, struct mm_struct *mm)
> > This should return the proper type
> > 
> 
> Can you please elaborate a bit on "return the proper type"? Did you mean
> return iommu_sva_domain instead? That's a wrapper of iommu_domain and
> only for iommu internal usage.

If you are exposing special SVA APIs then it is not internal usage
only anymore, so expose the type.

Jason