• Ard Biesheuvel's avatar
    crypto: arm/aes - replace scalar AES cipher · 81edb426
    Ard Biesheuvel authored
    This replaces the scalar AES cipher that originates in the OpenSSL project
    with a new implementation that is ~15% (*) faster (on modern cores), and
    reuses the lookup tables and the key schedule generation routines from the
    generic C implementation (which is usually compiled in anyway due to
    networking and other subsystems depending on it).
    
    Note that the bit sliced NEON code for AES still depends on the scalar cipher
    that this patch replaces, so it is not removed entirely yet.
    
    * On Cortex-A57, the performance increases from 17.0 to 14.9 cycles per byte
      for 128-bit keys.
    Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    81edb426
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