Both the GHASH and the CRC-T10DIF SIMD routines are based on 64-bit polynomial multiplication, but fall back to the slower 8-bit polynomial instructions if the optional 64-bit PMULL instruction is not implemented. This means we can only ever test one of the two on a single system, which is unfortunate. So instead, register both versions on hardware that supports them, and let the crypto API decide which is the preferred one based on priorities. That way, both will be tested, but only the fastest available one will be used. Ard Biesheuvel (2): crypto: arm64/crct10dif - register PMULL variants as separate algos crypto: arm64/ghash - register PMULL variants as separate algos arch/arm64/crypto/crct10dif-ce-glue.c | 54 +++++++-- arch/arm64/crypto/ghash-ce-glue.c | 118 +++++++++++++++----- 2 files changed, 132 insertions(+), 40 deletions(-) -- 2.17.1
