diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-03-05 11:17:07 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-03-16 23:35:41 +0800 |
| commit | 91a2abb78f940ac821345cb7cc376dca94336c2f (patch) | |
| tree | 4cbb4cb3244b1fe554a1eca6f7069f77edbac73a /arch/arm64/crypto/Kconfig | |
| parent | 6c51ddddac46ab124a3f10fd17cf34979670c1ce (diff) | |
crypto: arm64/speck - add NEON-accelerated implementation of Speck-XTS
Add a NEON-accelerated implementation of Speck128-XTS and Speck64-XTS
for ARM64. This is ported from the 32-bit version. It may be useful on
devices with 64-bit ARM CPUs that don't have the Cryptography
Extensions, so cannot do AES efficiently -- e.g. the Cortex-A53
processor on the Raspberry Pi 3.
It generally works the same way as the 32-bit version, but there are
some slight differences due to the different instructions, registers,
and syntax available in ARM64 vs. in ARM32. For example, in the 64-bit
version there are enough registers to hold the XTS tweaks for each
128-byte chunk, so they don't need to be saved on the stack.
Benchmarks on a Raspberry Pi 3 running a 64-bit kernel:
Algorithm Encryption Decryption
--------- ---------- ----------
Speck64/128-XTS (NEON) 92.2 MB/s 92.2 MB/s
Speck128/256-XTS (NEON) 75.0 MB/s 75.0 MB/s
Speck128/256-XTS (generic) 47.4 MB/s 35.6 MB/s
AES-128-XTS (NEON bit-sliced) 33.4 MB/s 29.6 MB/s
AES-256-XTS (NEON bit-sliced) 24.6 MB/s 21.7 MB/s
The code performs well on higher-end ARM64 processors as well, though
such processors tend to have the Crypto Extensions which make AES
preferred. For example, here are the same benchmarks run on a HiKey960
(with CPU affinity set for the A73 cores), with the Crypto Extensions
implementation of AES-256-XTS added:
Algorithm Encryption Decryption
--------- ----------- -----------
AES-256-XTS (Crypto Extensions) 1273.3 MB/s 1274.7 MB/s
Speck64/128-XTS (NEON) 359.8 MB/s 348.0 MB/s
Speck128/256-XTS (NEON) 292.5 MB/s 286.1 MB/s
Speck128/256-XTS (generic) 186.3 MB/s 181.8 MB/s
AES-128-XTS (NEON bit-sliced) 142.0 MB/s 124.3 MB/s
AES-256-XTS (NEON bit-sliced) 104.7 MB/s 91.1 MB/s
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm64/crypto/Kconfig')
| -rw-r--r-- | arch/arm64/crypto/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig index 285c36c7b408..cb5a243110c4 100644 --- a/arch/arm64/crypto/Kconfig +++ b/arch/arm64/crypto/Kconfig @@ -113,4 +113,10 @@ config CRYPTO_AES_ARM64_BS select CRYPTO_AES_ARM64 select CRYPTO_SIMD +config CRYPTO_SPECK_NEON + tristate "NEON accelerated Speck cipher algorithms" + depends on KERNEL_MODE_NEON + select CRYPTO_BLKCIPHER + select CRYPTO_SPECK + endif |