On Mon, 2019-08-26 at 17:06 +0200, Christoph Hellwig wrote: > With a little tweak to the intel-iommu code we should be able to work > around the VMD mess for the requester IDs without having to create giant > amounts of boilerplate DMA ops wrapping code. The other advantage of > this scheme is that we can respect the real DMA masks for the actual > devices, and I bet it will only be a matter of time until we'll see the > first DMA challeneged NVMe devices. > > The only downside is that we can't offer vmd as a module given that > intel-iommu calls into it. But the driver only has about 700 lines > of code, so this should not be a major issue. If we're going to remove its ability to be a module, and given its small size, could we make this default =y? Otherwise we risk breaking platforms which have it enabled with OSVs who miss enabling it > > This also removes the leftover bits of the X86_DEV_DMA_OPS dma_map_ops > registry. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > lgtm otherwise Reviewed-by: Jon Derrick <jonathan.derrick@xxxxxxxxx>
