From 7c1da8d0d046174a4188b5729d7579abf3d29427 Mon Sep 17 00:00:00 2001 From: chandramouli narayanan Date: Thu, 20 Mar 2014 15:14:00 -0700 Subject: crypto: sha - SHA1 transform x86_64 AVX2 This git patch adds x86_64 AVX2 optimization of SHA1 transform to crypto support. The patch has been tested with 3.14.0-rc1 kernel. On a Haswell desktop, with turbo disabled and all cpus running at maximum frequency, tcrypt shows AVX2 performance improvement from 3% for 256 bytes update to 16% for 1024 bytes update over AVX implementation. This patch adds sha1_avx2_transform(), the glue, build and configuration changes needed for AVX2 optimization of SHA1 transform to crypto support. sha1-ssse3 is one module which adds the necessary optimization support (SSSE3/AVX/AVX2) for the low-level SHA1 transform function. With better optimization support, transform function is overridden as the case may be. In the case of AVX2, due to performance reasons across datablock sizes, the AVX or AVX2 transform function is used at run-time as it suits best. The Makefile change therefore appends the necessary objects to the linkage. Due to this, the patch merely appends AVX2 transform to the existing build mix and Kconfig support and leaves the configuration build support as is. Signed-off-by: Chandramouli Narayanan Reviewed-by: Marek Vasut Acked-by: H. Peter Anvin Signed-off-by: Herbert Xu --- crypto/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'crypto') diff --git a/crypto/Kconfig b/crypto/Kconfig index 7bcb70d216e1..ce4012a58781 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -491,14 +491,14 @@ config CRYPTO_SHA1 SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2). config CRYPTO_SHA1_SSSE3 - tristate "SHA1 digest algorithm (SSSE3/AVX)" + tristate "SHA1 digest algorithm (SSSE3/AVX/AVX2)" depends on X86 && 64BIT select CRYPTO_SHA1 select CRYPTO_HASH help SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented using Supplemental SSE3 (SSSE3) instructions or Advanced Vector - Extensions (AVX), when available. + Extensions (AVX/AVX2), when available. config CRYPTO_SHA256_SSSE3 tristate "SHA256 digest algorithm (SSSE3/AVX/AVX2)" -- cgit