On Thu, Oct 11, 2018 at 04:56:42PM +0100, Robin Murphy wrote: > The original motivation for iommu_map_sg() was to give IOMMU drivers the > chance to map an IOVA-contiguous scatterlist as efficiently as they > could. It turns out that there isn't really much driver-specific > business involved there, so now that the default implementation is > mandatory let's just improve that - the main thing we're after is to use > larger pages wherever possible, and as long as domain->pgsize_bitmap > reflects reality, iommu_map() can already do that in a generic way. All > we need to do is detect physically-contiguous segments and batch them > into a single map operation, since whatever we do here is transparent to > our caller and not bound by any segment-length restrictions on the list > itself. > > Speaking of efficiency, there's really very little point in duplicating > the checks that iommu_map() is going to do anyway, so those get cleared > up in the process. > > Signed-off-by: Robin Murphy <[email protected]>
Looks correct, applied, thanks. _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
