>> What issue "IOMMU doesn't solve"? >> >> Issue I'm trying to address is - inconsistency within swiotlb >> dma_map_ops, where (1) any wide mask is silently accepted, but (2) then >> mask is used to decide if bounce buffers are needed or not. This >> inconsistency causes NVMe+R-Car cobmo not working (and breaking memory >> instead). > > The fundamental underlying problem is the "any wide mask is silently > accepted" part, and that applies equally to IOMMU ops as well. Is just posted version better? It should cover iommu case as well. Nikita
