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| author | Anton Blanchard <anton@samba.org> | 2016-07-01 01:19:45 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-07-05 18:05:19 +0300 |
| commit | 6dd7a82cc54ebd2936763befd3dcd4beb727a704 (patch) | |
| tree | 4077ad30a801a6e7dcc0b915612e2c815239fd9b /arch/powerpc/crypto/Makefile | |
| parent | 151f25112ff7befc134ed3fc58b0ff8792b3169e (diff) | |
| download | linux-6dd7a82cc54ebd2936763befd3dcd4beb727a704.tar.xz | |
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>
Diffstat (limited to 'arch/powerpc/crypto/Makefile')
| -rw-r--r-- | arch/powerpc/crypto/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/crypto/Makefile b/arch/powerpc/crypto/Makefile index 9c221b69c181..7998c177f0a2 100644 --- a/arch/powerpc/crypto/Makefile +++ b/arch/powerpc/crypto/Makefile @@ -9,9 +9,11 @@ obj-$(CONFIG_CRYPTO_MD5_PPC) += md5-ppc.o obj-$(CONFIG_CRYPTO_SHA1_PPC) += sha1-powerpc.o obj-$(CONFIG_CRYPTO_SHA1_PPC_SPE) += sha1-ppc-spe.o obj-$(CONFIG_CRYPTO_SHA256_PPC_SPE) += sha256-ppc-spe.o +obj-$(CONFIG_CRYPT_CRC32C_VPMSUM) += crc32c-vpmsum.o aes-ppc-spe-y := aes-spe-core.o aes-spe-keys.o aes-tab-4k.o aes-spe-modes.o aes-spe-glue.o md5-ppc-y := md5-asm.o md5-glue.o sha1-powerpc-y := sha1-powerpc-asm.o sha1.o sha1-ppc-spe-y := sha1-spe-asm.o sha1-spe-glue.o sha256-ppc-spe-y := sha256-spe-asm.o sha256-spe-glue.o +crc32c-vpmsum-y := crc32c-vpmsum_asm.o crc32c-vpmsum_glue.o |