linux-kernel - Re: [PATCH] crypto: x86/aes-xts - access round keys using single-byte offsets

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Date: Fri, 19 Apr 2024 18:59:15 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Eric Biggers <ebiggers@...nel.org>
Cc: linux-crypto@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org, chang.seok.bae@...el.com,
	stefan.kanthak@...go.de
Subject: Re: [PATCH] crypto: x86/aes-xts - access round keys using
 single-byte offsets

Eric Biggers <ebiggers@...nel.org> wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Access the AES round keys using offsets -7*16 through 7*16, instead of
> 0*16 through 14*16.  This allows VEX-encoded instructions to address all
> round keys using 1-byte offsets, whereas before some needed 4-byte
> offsets.  This decreases the code size of aes-xts-avx-x86_64.o by 4.2%.
> 
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>
> ---
> arch/x86/crypto/aes-xts-avx-x86_64.S | 81 +++++++++++++++-------------
> 1 file changed, 44 insertions(+), 37 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt