diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-01-11 19:41:53 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-01-12 19:26:50 +0300 |
| commit | 81edb42629758bacdf813dd5e4542ae26e3ad73a (patch) | |
| tree | cc4e010ac2132c4a01094f43350716010868a9f1 /arch/arm/crypto/Kconfig | |
| parent | bed593c0e852f5c1efd3ca4e984fd744c51cf6ee (diff) | |
| download | linux-81edb42629758bacdf813dd5e4542ae26e3ad73a.tar.xz | |
crypto: arm/aes - replace scalar AES cipher
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: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm/crypto/Kconfig')
| -rw-r--r-- | arch/arm/crypto/Kconfig | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index 2f3339f015d3..f1de658c3c8f 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -62,33 +62,15 @@ config CRYPTO_SHA512_ARM using optimized ARM assembler and NEON, when available. config CRYPTO_AES_ARM - tristate "AES cipher algorithms (ARM-asm)" - depends on ARM + tristate "Scalar AES cipher for ARM" select CRYPTO_ALGAPI select CRYPTO_AES help Use optimized AES assembler routines for ARM platforms. - AES cipher algorithms (FIPS-197). AES uses the Rijndael - algorithm. - - Rijndael appears to be consistently a very good performer in - both hardware and software across a wide range of computing - environments regardless of its use in feedback or non-feedback - modes. Its key setup time is excellent, and its key agility is - good. Rijndael's very low memory requirements make it very well - suited for restricted-space environments, in which it also - demonstrates excellent performance. Rijndael's operations are - among the easiest to defend against power and timing attacks. - - The AES specifies three key sizes: 128, 192 and 256 bits - - See <http://csrc.nist.gov/encryption/aes/> for more information. - config CRYPTO_AES_ARM_BS tristate "Bit sliced AES using NEON instructions" depends on KERNEL_MODE_NEON - select CRYPTO_AES_ARM select CRYPTO_BLKCIPHER select CRYPTO_SIMD help |