crypto: twofish - add AVX2/x86_64 assembler implementation of twofish cipher
Patch adds AVX2/x86-64 implementation of Twofish cipher, requiring 16 parallel
blocks for input (256 bytes). Table look-ups are performed using vpgatherdd
instruction directly from vector registers and thus should be faster than
earlier implementations. Implementation also uses 256-bit wide YMM registers,
which should give additional speed up compared to the AVX implementation.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 6b9564f..1ba48dd 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1250,6 +1250,30 @@
See also:
<http://www.schneier.com/twofish.html>
+config CRYPTO_TWOFISH_AVX2_X86_64
+ tristate "Twofish cipher algorithm (x86_64/AVX2)"
+ depends on X86 && 64BIT
+ select CRYPTO_ALGAPI
+ select CRYPTO_CRYPTD
+ select CRYPTO_ABLK_HELPER_X86
+ select CRYPTO_GLUE_HELPER_X86
+ select CRYPTO_TWOFISH_COMMON
+ select CRYPTO_TWOFISH_X86_64
+ select CRYPTO_TWOFISH_X86_64_3WAY
+ select CRYPTO_TWOFISH_AVX_X86_64
+ select CRYPTO_LRW
+ select CRYPTO_XTS
+ help
+ Twofish cipher algorithm (x86_64/AVX2).
+
+ Twofish was submitted as an AES (Advanced Encryption Standard)
+ candidate cipher by researchers at CounterPane Systems. It is a
+ 16 round block cipher supporting key sizes of 128, 192, and 256
+ bits.
+
+ See also:
+ <http://www.schneier.com/twofish.html>
+
comment "Compression"
config CRYPTO_DEFLATE