crypto: aesni-intel - Ported implementation to x86-32
The AES-NI instructions are also available in legacy mode so the 32-bit
architecture may profit from those, too.
To illustrate the performance gain here's a short summary of a dm-crypt
speed test on a Core i7 M620 running at 2.67GHz comparing both assembler
implementations:
x86: i568 aes-ni delta
ECB, 256 bit: 93.8 MB/s 123.3 MB/s +31.4%
CBC, 256 bit: 84.8 MB/s 262.3 MB/s +209.3%
LRW, 256 bit: 108.6 MB/s 222.1 MB/s +104.5%
XTS, 256 bit: 105.0 MB/s 205.5 MB/s +95.7%
Additionally, due to some minor optimizations, the 64-bit version also
got a minor performance gain as seen below:
x86-64: old impl. new impl. delta
ECB, 256 bit: 121.1 MB/s 123.0 MB/s +1.5%
CBC, 256 bit: 285.3 MB/s 290.8 MB/s +1.9%
LRW, 256 bit: 263.7 MB/s 265.3 MB/s +0.6%
XTS, 256 bit: 251.1 MB/s 255.3 MB/s +1.7%
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Reviewed-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 69437e2..467491d 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -539,8 +539,9 @@
config CRYPTO_AES_NI_INTEL
tristate "AES cipher algorithms (AES-NI)"
- depends on (X86 || UML_X86) && 64BIT
- select CRYPTO_AES_X86_64
+ depends on (X86 || UML_X86)
+ select CRYPTO_AES_X86_64 if 64BIT
+ select CRYPTO_AES_586 if !64BIT
select CRYPTO_CRYPTD
select CRYPTO_ALGAPI
select CRYPTO_FPU
@@ -563,9 +564,10 @@
See <http://csrc.nist.gov/encryption/aes/> for more information.
- In addition to AES cipher algorithm support, the
- acceleration for some popular block cipher mode is supported
- too, including ECB, CBC, CTR, LRW, PCBC, XTS.
+ In addition to AES cipher algorithm support, the acceleration
+ for some popular block cipher mode is supported too, including
+ ECB, CBC, LRW, PCBC, XTS. The 64 bit version has additional
+ acceleration for CTR.
config CRYPTO_ANUBIS
tristate "Anubis cipher algorithm"