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authorHuang Ying <ying.huang@intel.com>2009-03-29 15:41:20 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2009-06-02 14:04:16 +1000
commit2cf4ac8beb9dc50a315a6155b7b70e754d511958 (patch)
tree0c4043a1455ab581b4e505604df290acd59ef79e /crypto
parent150c7e85526e80474b87004f4b420e8834fdeb43 (diff)
downloadlinux-linaro-2cf4ac8beb9dc50a315a6155b7b70e754d511958.tar.gz
crypto: aes-ni - Add support for more modes
Because kernel_fpu_begin() and kernel_fpu_end() operations are too slow, the performance gain of general mode implementation + aes-aesni is almost all compensated. The AES-NI support for more modes are implemented as follow: - Add a new AES algorithm implementation named __aes-aesni without kernel_fpu_begin/end() - Use fpu(<mode>(AES)) to provide kenrel_fpu_begin/end() invoking - Add <mode>(AES) ablkcipher, which uses cryptd(fpu(<mode>(AES))) to defer cryption to cryptd context in soft_irq context. Now the ctr, lrw, pcbc and xts support are added. Performance testing based on dm-crypt shows that cryption time can be reduced to 50% of general mode implementation + aes-aesni implementation. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 66ff22a36ed..4dfdd03e708 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -491,6 +491,7 @@ config CRYPTO_AES_NI_INTEL
select CRYPTO_AES_X86_64
select CRYPTO_CRYPTD
select CRYPTO_ALGAPI
+ select CRYPTO_FPU
help
Use Intel AES-NI instructions for AES algorithm.
@@ -510,6 +511,10 @@ 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.
+
config CRYPTO_ANUBIS
tristate "Anubis cipher algorithm"
select CRYPTO_ALGAPI