linux-kernel - [PATCH crypto 0/2] smaller blake2s code size on m68k and other small platforms

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Message-Id: <20220111134934.324663-1-Jason@zx2c4.com>
Date:   Tue, 11 Jan 2022 14:49:32 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     linux-crypto@...r.kernel.org, netdev@...r.kernel.org,
        wireguard@...ts.zx2c4.com, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org, geert@...ux-m68k.org, tytso@....edu,
        gregkh@...uxfoundation.org, jeanphilippe.aumasson@...il.com,
        ardb@...nel.org
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH crypto 0/2] smaller blake2s code size on m68k and other small platforms

Hi,

Geert emailed me this afternoon concerned about blake2s codesize on m68k
and other small systems. We identified two extremely effective ways of
chopping down the size. One of them moves some wireguard-specific things
into wireguard proper. The other one adds a slower codepath for
CONFIG_CC_OPTIMIZE_FOR_SIZE configurations. I really don't like that
slower codepath, but since it is configuration gated, at least it stays
out of the way except for people who know they need a tiny kernel image

Thanks,
Jason

Jason A. Donenfeld (2):
  lib/crypto: blake2s-generic: reduce code size on small systems
  lib/crypto: blake2s: move hmac construction into wireguard

 drivers/net/wireguard/noise.c | 45 ++++++++++++++++++++++++++++++-----
 include/crypto/blake2s.h      |  3 ---
 lib/crypto/blake2s-generic.c  | 30 +++++++++++++----------
 lib/crypto/blake2s-selftest.c | 31 ------------------------
 lib/crypto/blake2s.c          | 37 ----------------------------
 5 files changed, 57 insertions(+), 89 deletions(-)

-- 
2.34.1