• chandramouli narayanan's avatar
    crypto: sha - SHA1 transform x86_64 AVX2 · 7c1da8d0
    chandramouli narayanan authored
    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: default avatarChandramouli Narayanan <mouli@linux.intel.com>
    Reviewed-by: default avatarMarek Vasut <marex@denx.de>
    Acked-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    7c1da8d0
sha1_ssse3_glue.c 6.64 KB