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See http://www.infradead.org/rpr.html Cc: devicetree@vger.kernel.org, kevin.tian@intel.com, jgg@ziepe.ca, linux-pci@vger.kernel.org, robin.murphy@arm.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, catalin.marinas@arm.com, zhangfei.gao@linaro.org, will@kernel.org, christian.koenig@amd.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Apr 16, 2020 at 10:54:02AM +0200, Jean-Philippe Brucker wrote: > 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 I don't think we mean the same thing, probably because of my rather imprecise use of the word device. What I mean is that the mmu_notifier should not be embedded into the io_mm structure (whch btw, seems to have a way to generic name, just like all other io_* prefixed names), but instead into the iommu_bond structure. That avoid the whole multiplexing layer. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu