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crypto: aesni-intel - Ported implementation to x86-32

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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>
This commit is contained in:
Mathias Krause
2010-11-27 16:34:46 +08:00
committed by Herbert Xu
parent 21ea28abcf
commit 0d258efb6a
3 changed files with 191 additions and 40 deletions
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crypto/Kconfig
+7 -5
View File
@@ -539,8 +539,9 @@ config CRYPTO_AES_X86_64
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 @@ config CRYPTO_AES_NI_INTEL
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"