On Thu, Apr 16, 2020 at 12:28:52AM -0700, Christoph Hellwig wrote:
> > +   rcu_read_lock();
> > +   hlist_for_each_entry_rcu(bond, &io_mm->devices, mm_node)
> > +           io_mm->ops->invalidate(bond->sva.dev, io_mm->pasid, io_mm->ctx,
> > +                                  start, end - start);
> > +   rcu_read_unlock();
> > +}
> 
> What is the reason that the devices don't register their own notifiers?
> This kinds of multiplexing is always rather messy, and you do it for
> all the methods.

This sends TLB and ATC invalidations through the IOMMU, it doesn't go
through device drivers

Thanks,
Jean
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