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 <mouli@linux.intel.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 7bcb70d..ce4012a 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -491,14 +491,14 @@
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)"