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crypto: arm64/aes-ce-gcm - implement 2-way aggregation
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Mon, 30 Jul 2018 21:06:41 +0000 (23:06 +0200)
committerHerbert Xu <herbert@gondor.apana.org.au>
Tue, 7 Aug 2018 09:38:04 +0000 (17:38 +0800)
commit200f12656550eda537e67a247ce98b98b1f3fea3
treed47256d0fbe502566da59e2efbc3811ebf6cfbbftree | snapshot
parenta5dfd91265067f142210a68a8eb0dfd904285fd1commit | diff
crypto: arm64/aes-ce-gcm - implement 2-way aggregation

Implement a faster version of the GHASH transform which amortizes
the reduction modulo the characteristic polynomial across two
input blocks at a time.

On a Cortex-A53, the gcm(aes) performance increases 24%, from
3.0 cycles per byte to 2.4 cpb for large input sizes.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
arch/arm64/crypto/ghash-ce-core.S diff | blob | history
arch/arm64/crypto/ghash-ce-glue.c diff | blob | history
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