• Anton Blanchard's avatar
    crypto: vmx - Increase priority of aes-cbc cipher · 12d3f49e
    Anton Blanchard authored
    All of the VMX AES ciphers (AES, AES-CBC and AES-CTR) are set at
    priority 1000. Unfortunately this means we never use AES-CBC and
    AES-CTR, because the base AES-CBC cipher that is implemented on
    top of AES inherits its priority.
    To fix this, AES-CBC and AES-CTR have to be a higher priority. Set
    them to 2000.
    Testing on a POWER8 with:
    cryptsetup benchmark --cipher aes --key-size 256
    Shows decryption speed increase from 402.4 MB/s to 3069.2 MB/s,
    over 7x faster. Thanks to Mike Strosaker for helping me debug
    this issue.
    Fixes: 8c755ace ("crypto: vmx - Adding CBC routines for VMX module")
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
aes_cbc.c 5.21 KB