[PATCH 0/6] crypto: aegis128 - add NEON intrinsics version for ARM/arm64

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

Now that aegis128 has been announced as one of the winners of the CAESAR
competition, it's time to provide some better support for it on arm64 (and
32-bit ARM *)

This time, instead of cloning the generic driver twice and rewriting half
of it in arm64 and ARM assembly, add hooks for an accelerated SIMD path to
the generic driver, and populate it with a C version using NEON intrinsics
that can be built for both ARM and arm64. This results in a speedup of ~11x,
resulting in a performance of 2.2 cycles per byte on Cortex-A53.

Patches #1 .. #3 are some fixes/improvements for the generic code. Patch #4
adds the plumbing for using a SIMD accelerated implementation. Patch #5
adds the ARM and arm64 code, and patch #6 adds a speed test.

Note that aegis128l and aegis256 were not selected, and nor where any of the
morus contestants, and so we should probably consider dropping those drivers
again.

* 32-bit ARM today rarely provides the special AES instruction that the
  implementation in this series relies on, but this may change in the future,
  and the NEON intrinsics code can be compiled for both ISAs.

Cc: Eric Biggers <ebiggers@google.com>
Cc: Ondrej Mosnacek <omosnace@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Steve Capper <steve.capper@arm.com>

Ard Biesheuvel (6):
  crypto: aegis128 - use unaliged helper in unaligned decrypt path
  crypto: aegis - drop empty TFM init/exit routines
  crypto: aegis - avoid prerotated AES tables
  crypto: aegis128 - add support for SIMD acceleration
  crypto: aegis128 - provide a SIMD implementation based on NEON
    intrinsics
  crypto: tcrypt - add a speed test for AEGIS128

 crypto/Kconfig               |   5 +
 crypto/Makefile              |  12 ++
 crypto/aegis.h               |  28 ++--
 crypto/aegis128-neon-inner.c | 142 ++++++++++++++++++++
 crypto/aegis128-neon.c       |  43 ++++++
 crypto/aegis128.c            |  55 +++++---
 crypto/aegis128l.c           |  11 --
 crypto/aegis256.c            |  11 --
 crypto/tcrypt.c              |   7 +
 9 files changed, 261 insertions(+), 53 deletions(-)
 create mode 100644 crypto/aegis128-neon-inner.c
 create mode 100644 crypto/aegis128-neon.c

-- 
2.20.1


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