On Wed, Oct 02, 2019 at 04:17:13PM +0200, Ard Biesheuvel wrote: > Reimplement the library routines to perform chacha20poly1305 en/decryption > on scatterlists, without [ab]using the [deprecated] blkcipher interface, > which is rather heavyweight and does things we don't really need. > > Instead, we use the sg_miter API in a novel and clever way, to iterate > over the scatterlist in-place (i.e., source == destination, which is the > only way this library is expected to be used). That way, we don't have to > iterate over two scatterlists in parallel. Nice idea. Probably this will result in a real speedup, as I suspect those extra prior kmaps weren't free. Looking forward to benching it.
