2 Commits

Author	SHA1	Message	Date
Anton Blanchard	d2cf5be07f	crypto: crc32c-vpmsum - Convert to CPU feature based module autoloading ... This patch utilises the GENERIC_CPU_AUTOPROBE infrastructure to automatically load the crc32c-vpmsum module if the CPU supports it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>	2016-08-09 14:50:17 +10:00
Anton Blanchard	6dd7a82cc5	crypto: powerpc - Add POWER8 optimised crc32c ... Use the vector polynomial multiply-sum instructions in POWER8 to speed up crc32c. This is just over 41x faster than the slice-by-8 method that it replaces. Measurements on a 4.1 GHz POWER8 show it sustaining 52 GiB/sec. A simple btrfs write performance test: dd if=/dev/zero of=/mnt/tmpfile bs=1M count=4096 sync is over 3.7x faster. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>	2016-07-05 23:05:19 +08:00