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authorMartin Willi <martin@strongswan.org>2015-07-16 19:14:03 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2015-07-17 21:20:25 +0800
commit3d1e93cdf16cfe6f315167c65dc504e467e4681a (patch)
tree500aae710ce50604b90858b4204e6fb54bfbe541 /crypto/Kconfig
parent274f938e0a01286f465d84d5a3f1565225f4ec4b (diff)
downloadlinux-stericsson-3d1e93cdf16cfe6f315167c65dc504e467e4681a.tar.gz
crypto: chacha20 - Add an eight block AVX2 variant for x86_64
Extends the x86_64 ChaCha20 implementation by a function processing eight ChaCha20 blocks in parallel using AVX2. For large messages, throughput increases by ~55-70% compared to four block SSSE3: testing speed of chacha20 (chacha20-simd) encryption test 0 (256 bit key, 16 byte blocks): 42249230 operations in 10 seconds (675987680 bytes) test 1 (256 bit key, 64 byte blocks): 46441641 operations in 10 seconds (2972265024 bytes) test 2 (256 bit key, 256 byte blocks): 33028112 operations in 10 seconds (8455196672 bytes) test 3 (256 bit key, 1024 byte blocks): 11568759 operations in 10 seconds (11846409216 bytes) test 4 (256 bit key, 8192 byte blocks): 1448761 operations in 10 seconds (11868250112 bytes) testing speed of chacha20 (chacha20-simd) encryption test 0 (256 bit key, 16 byte blocks): 41999675 operations in 10 seconds (671994800 bytes) test 1 (256 bit key, 64 byte blocks): 45805908 operations in 10 seconds (2931578112 bytes) test 2 (256 bit key, 256 byte blocks): 32814947 operations in 10 seconds (8400626432 bytes) test 3 (256 bit key, 1024 byte blocks): 19777167 operations in 10 seconds (20251819008 bytes) test 4 (256 bit key, 8192 byte blocks): 2279321 operations in 10 seconds (18672197632 bytes) Benchmark results from a Core i5-4670T. Signed-off-by: Martin Willi <martin@strongswan.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
-rw-r--r--crypto/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 8f24185ee0a7..82caab0e8256 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1214,7 +1214,7 @@ config CRYPTO_CHACHA20
<http://cr.yp.to/chacha/chacha-20080128.pdf>
config CRYPTO_CHACHA20_X86_64
- tristate "ChaCha20 cipher algorithm (x86_64/SSSE3)"
+ tristate "ChaCha20 cipher algorithm (x86_64/SSSE3/AVX2)"
depends on X86 && 64BIT
select CRYPTO_BLKCIPHER
select CRYPTO_CHACHA20