On Sun, Nov 20, 2016 at 11:42:01AM +0000, Ard Biesheuvel wrote:
> This integrates both the accelerated scalar and the NEON implementations
> of SHA-224/256 as well as SHA-384/512 from the OpenSSL project.
>
> Relative performance compared to the respective generic C versions:
>
> | SHA256-scalar | SHA256-NEON* | SHA512 |
> ------------+-----------------+--------------+----------+
> Cortex-A53 | 1.63x | 1.63x | 2.34x |
> Cortex-A57 | 1.43x | 1.59x | 1.95x |
> Cortex-A73 | 1.26x | 1.56x | ? |
>
> The core crypto code was authored by Andy Polyakov of the OpenSSL
> project, in collaboration with whom the upstream code was adapted so
> that this module can be built from the same version of sha512-armv8.pl.
>
> The version in this patch was taken from OpenSSL commit 32bbb62ea634
> ("sha/asm/sha512-armv8.pl: fix big-endian support in __KERNEL__ case.")
>
> * The core SHA algorithm is fundamentally sequential, but there is a
> secondary transformation involved, called the schedule update, which
> can be performed independently. The NEON version of SHA-224/SHA-256
> only implements this part of the algorithm using NEON instructions,
> the sequential part is always done using scalar instructions.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> ---
> arch/arm64/crypto/Kconfig | 8 +
> arch/arm64/crypto/Makefile | 17 +
> arch/arm64/crypto/sha256-core.S_shipped | 2061 ++++++++++++++++++++
> arch/arm64/crypto/sha256-glue.c | 185 ++
> arch/arm64/crypto/sha512-armv8.pl | 778 ++++++++
> arch/arm64/crypto/sha512-core.S_shipped | 1085 +++++++++++
> arch/arm64/crypto/sha512-glue.c | 94 +
> 7 files changed, 4228 insertions(+)
If I build a kernel with this applied and CRYPTO_SHA{256,512}_ARM64=y,
then I end up with untracked .S files according to git:
$ git status
Untracked files:
arch/arm64/crypto/sha256-core.S
arch/arm64/crypto/sha512-core.S
Will
--
To unsubscribe from this list: send the line "unsubscribe linux-crypto" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
