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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2005-07-06 22:52:09 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-07-06 22:52:09 +0200 |
| commit | 95477377995aefa2ec1654a9a3777bd57ea99146 (patch) | |
| tree | 7aa4d6173de13c81c2fa0e4d2f9e0de22e141b6a /drivers/crypto | |
| parent | [CRYPTO] Add support for low-level multi-block operations (diff) | |
| download | linux-95477377995aefa2ec1654a9a3777bd57ea99146.tar.xz linux-95477377995aefa2ec1654a9a3777bd57ea99146.zip | |
[CRYPTO] Add alignmask for low-level cipher implementations
The VIA Padlock device requires the input and output buffers to
be aligned on 16-byte boundaries. This patch adds the alignmask
attribute for low-level cipher implementations to indicate their
alignment requirements.
The mid-level crypt() function will copy the input/output buffers
if they are not aligned correctly before they are passed to the
low-level implementation.
Strictly speaking, some of the software implementations require
the buffers to be aligned on 4-byte boundaries as they do 32-bit
loads. However, it is not clear whether it is better to copy
the buffers or pay the penalty for unaligned loads/stores.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/crypto')
0 files changed, 0 insertions, 0 deletions