[PATCH 3/6] vfio: remove the unused mdev iommu hook

[Christoph Hellwig]

On Fri, Jul 23, 2021 at 05:36:17AM +0000, Tian, Kevin wrote:
> > > And a new set of IOMMU-API:
> > >
> > >     - iommu_{un}bind_pgtable(domain, dev, addr);
> > >     - iommu_{un}bind_pgtable_pasid(domain, dev, addr, pasid);
> > >     - iommu_cache_invalidate(domain, dev, invalid_info);
> > 
> > What caches is this supposed to "invalidate"?
> 
> pasid cache, iotlb or dev_iotlb entries that are related to the bound 
> pgtable. the actual affected cache type and granularity (device-wide,
> pasid-wide, selected addr-range) are specified by the caller.

Maybe call it pgtable_invalidate or similar?  To avoid confusing it
with the CPUs dcache.