summaryrefslogtreecommitdiff
path: root/crypto
diff options
context:
space:
mode:
authorJussi Kivilinna <jussi.kivilinna@iki.fi>2013-04-08 21:51:16 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2013-04-25 21:01:53 +0800
commitc456a9cd1ac4eae9147ffd7ac4fb77ca0fa980c6 (patch)
treef8e88f1e30b24e08104367fc6244dab88cd90d0e /crypto
parentb5c5b072dc2f35d45d3404b957e264a3e8e71069 (diff)
downloadkernel-c456a9cd1ac4eae9147ffd7ac4fb77ca0fa980c6.tar.gz
crypto: aesni_intel - add more optimized XTS mode for x86-64
Add more optimized XTS code for aesni_intel in 64-bit mode, for smaller stack usage and boost for speed. tcrypt results, with Intel i5-2450M: 256-bit key enc dec 16B 0.98x 0.99x 64B 0.64x 0.63x 256B 1.29x 1.32x 1024B 1.54x 1.58x 8192B 1.57x 1.60x 512-bit key enc dec 16B 0.98x 0.99x 64B 0.60x 0.59x 256B 1.24x 1.25x 1024B 1.39x 1.42x 8192B 1.38x 1.42x I chose not to optimize smaller than block size of 256 bytes, since XTS is practically always used with data blocks of size 512 bytes. This is why performance is reduced in tcrypt for 64 byte long blocks. Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index c1142f31a00c..808ac374b21f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -678,6 +678,7 @@ config CRYPTO_AES_NI_INTEL
select CRYPTO_CRYPTD
select CRYPTO_ABLK_HELPER_X86
select CRYPTO_ALGAPI
+ select CRYPTO_GLUE_HELPER if 64BIT
select CRYPTO_LRW
select CRYPTO_XTS
help