On Tue, 2015-11-03 at 14:11 +0100, Christoph Hellwig wrote: > > xHCI for example, vs. something like 10G ethernet... but yes I agree it > > sucks. I don't like that sort of policy anywhere in drivers. On the > > other hand the platform doesn't have much information to make that sort > > of decision either. > > Mabye because it should simply use what's optimal? E.g. passthrough > whenever possible, where arguments against possible are: dma_mask, vfio > requirements, kernel command line option. Right this is what I do today on powerpc with the exception of the command line option. > This is what a lot of > architectures already do, I remember the SGI Origin / Altix code has the > same behavior as well. Those IOMMUs already had the 64 bit passthrough > and 32-bit sliding window in addition to the real IOMMU 10 years ago. > -- -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
