On Sun, 2015-10-25 at 09:07 -0700, Shamir Rabinovitch wrote: > > + > +DMA_ATTR_IOMMU_BYPASS > +--------------------- > + > > +For systems with IOMMU it is assumed all DMA translations use the IOMMU. Not entirely true. We have per-device dma_ops on a most architectures already, and we were just talking about the need to add them to POWER/SPARC too, because we need to avoid trying to use the IOMMU to map virtio devices too. As we look at that (and make the per-device dma_ops a generic thing rather than per-arch), we should probably look at folding your case in too. -- dwmw2
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