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Author SHA1 Message Date
Ard Biesheuvel 56e4e76c68 crypto: arm64/aes-ccm-ce: fix for big endian 
The AES-CCM implementation that uses ARMv8 Crypto Extensions instructions
refers to the AES round keys as pairs of 64-bit quantities, which causes
failures when building the code for big endian. In addition, it byte swaps
the input counter unconditionally, while this is only required for little
endian builds. So fix both issues.

Fixes: 12ac3efe74 ("arm64/crypto: use crypto instructions to generate AES key schedule")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 2016-10-21 11:03:43 +08:00
Ard Biesheuvel 4a97abd443 arm64/crypto: issue aese/aesmc instructions in pairs 
This changes the AES core transform implementations to issue aese/aesmc
(and aesd/aesimc) in pairs. This enables a micro-architectural optimization
in recent Cortex-A5x cores that improves performance by 50-90%.

Measured performance in cycles per byte (Cortex-A57):

                CBC enc         CBC dec         CTR
  before        3.64            1.34            1.32
  after         1.95            0.85            0.93

Note that this results in a ~5% performance decrease for older cores.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 2015-03-19 10:43:57 +00:00
Ard Biesheuvel a3fd82105b arm64/crypto: AES in CCM mode using ARMv8 Crypto Extensions 
This patch adds support for the AES-CCM encryption algorithm for CPUs that
have support for the AES part of the ARM v8 Crypto Extensions.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
 2014-05-14 10:04:15 -07:00