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

Christoph Hellwig
2021-07-23T05:41:14Z

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.