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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/testmgr.c
parent150c7e85526e80474b87004f4b420e8834fdeb43 (diff)
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>
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