From c456a9cd1ac4eae9147ffd7ac4fb77ca0fa980c6 Mon Sep 17 00:00:00 2001 From: Jussi Kivilinna Date: Mon, 8 Apr 2013 21:51:16 +0300 Subject: 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 Signed-off-by: Jussi Kivilinna Signed-off-by: Herbert Xu --- crypto/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'crypto/Kconfig') diff --git a/crypto/Kconfig b/crypto/Kconfig index c1142f31a00..808ac374b21 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 -- cgit v1.2.3-70-g09d2