From: Eric Biggers <ebiggers@kernel.org>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: "open list:HARDWARE RANDOM NUMBER GENERATOR CORE"
<linux-crypto@vger.kernel.org>,
linux-fscrypt@vger.kernel.org,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
Paul Crowley <paulcrowley@google.com>,
Greg Kaiser <gkaiser@google.com>,
Michael Halcrow <mhalcrow@google.com>,
"Jason A . Donenfeld" <Jason@zx2c4.com>,
Samuel Neves <samuel.c.p.neves@gmail.com>,
Tomer Ashur <tomer.ashur@esat.kuleuven.be>
Subject: Re: [RFC PATCH v2 06/12] crypto: arm/chacha20 - refactor to allow varying number of rounds
Date: Fri, 19 Oct 2018 22:26:58 -0700 [thread overview]
Message-ID: <20181020052657.GB876@sol.localdomain> (raw)
In-Reply-To: <CAKv+Gu96nz-kMp8VwPZAoHC5jHvhZ4_jRYTDKS=XNmrqDW5i8A@mail.gmail.com>
Hi Ard,
On Sat, Oct 20, 2018 at 11:35:22AM +0800, Ard Biesheuvel wrote:
> On 16 October 2018 at 01:54, Eric Biggers <ebiggers@kernel.org> wrote:
> > From: Eric Biggers <ebiggers@google.com>
> >
> > In preparation for adding XChaCha12 support, rename/refactor the NEON
> > implementation of ChaCha20 to support different numbers of rounds.
> >
> > Signed-off-by: Eric Biggers <ebiggers@google.com>
>
> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
>
> > ---
> > arch/arm/crypto/Makefile | 4 +-
> > ...hacha20-neon-core.S => chacha-neon-core.S} | 36 ++++++------
> > ...hacha20-neon-glue.c => chacha-neon-glue.c} | 56 ++++++++++---------
> > 3 files changed, 52 insertions(+), 44 deletions(-)
> > rename arch/arm/crypto/{chacha20-neon-core.S => chacha-neon-core.S} (96%)
> > rename arch/arm/crypto/{chacha20-neon-glue.c => chacha-neon-glue.c} (73%)
> >
> > diff --git a/arch/arm/crypto/Makefile b/arch/arm/crypto/Makefile
> > index bd5bceef0605f..005482ff95047 100644
> > --- a/arch/arm/crypto/Makefile
> > +++ b/arch/arm/crypto/Makefile
> > @@ -9,7 +9,7 @@ obj-$(CONFIG_CRYPTO_SHA1_ARM) += sha1-arm.o
> > obj-$(CONFIG_CRYPTO_SHA1_ARM_NEON) += sha1-arm-neon.o
> > obj-$(CONFIG_CRYPTO_SHA256_ARM) += sha256-arm.o
> > obj-$(CONFIG_CRYPTO_SHA512_ARM) += sha512-arm.o
> > -obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha20-neon.o
> > +obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha-neon.o
> >
>
> I take it you are preserving the Kconfig symbol name to prevent
> breaking existing configs?
Yes, that's the intent. Though perhaps we should just change it.
>
> If so, we might consider doing something like
>
> config CRYPTO_CHACHA20_NEON
> tristate
>
> config CRYPTO_CHACHA_NEON
> default CRYPTO_CHACHA20_NEON
> ... the existing kconfig symbol description ...
>
> and drop the former at some point in the future?
>
The problem is that only symbols with a prompt string can be set explicitly,
e.g. in a kconfig file. So it's not possible to migrate a symbol to a new one
without breakage, unless both are to remain separately promptable. It seems
there should be a way, but last I checked I don't think there was...
- Eric
next prev parent reply other threads:[~2018-10-20 5:27 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-15 17:54 [RFC PATCH v2 00/12] crypto: Adiantum support Eric Biggers
2018-10-15 17:54 ` [RFC PATCH v2 01/12] crypto: chacha20-generic - add HChaCha20 library function Eric Biggers
2018-10-19 14:13 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 02/12] crypto: chacha20-generic - add XChaCha20 support Eric Biggers
2018-10-19 14:24 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 03/12] crypto: chacha20-generic - refactor to allow varying number of rounds Eric Biggers
2018-10-19 14:25 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 04/12] crypto: chacha - add XChaCha12 support Eric Biggers
2018-10-19 14:34 ` Ard Biesheuvel
2018-10-19 18:28 ` Eric Biggers
2018-10-15 17:54 ` [RFC PATCH v2 05/12] crypto: arm/chacha20 - add XChaCha20 support Eric Biggers
2018-10-20 2:29 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 06/12] crypto: arm/chacha20 - refactor to allow varying number of rounds Eric Biggers
2018-10-20 3:35 ` Ard Biesheuvel
2018-10-20 5:26 ` Eric Biggers [this message]
2018-10-15 17:54 ` [RFC PATCH v2 07/12] crypto: arm/chacha - add XChaCha12 support Eric Biggers
2018-10-20 3:36 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 08/12] crypto: poly1305 - add Poly1305 core API Eric Biggers
2018-10-20 3:45 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 09/12] crypto: nhpoly1305 - add NHPoly1305 support Eric Biggers
2018-10-20 4:00 ` Ard Biesheuvel
2018-10-20 5:38 ` Eric Biggers
2018-10-20 15:06 ` Ard Biesheuvel
2018-10-22 18:42 ` Eric Biggers
2018-10-22 22:25 ` Ard Biesheuvel
2018-10-22 22:40 ` Eric Biggers
2018-10-22 22:43 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 10/12] crypto: arm/nhpoly1305 - add NEON-accelerated NHPoly1305 Eric Biggers
2018-10-20 4:12 ` Ard Biesheuvel
2018-10-20 5:51 ` Eric Biggers
2018-10-20 15:00 ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 11/12] crypto: adiantum - add Adiantum support Eric Biggers
2018-10-20 4:17 ` Ard Biesheuvel
2018-10-20 7:12 ` Eric Biggers
2018-10-23 10:40 ` Ard Biesheuvel
2018-10-24 22:06 ` Eric Biggers
2018-10-30 8:17 ` Herbert Xu
2018-10-15 17:54 ` [RFC PATCH v2 12/12] fscrypt: " Eric Biggers
2018-10-19 15:58 ` [RFC PATCH v2 00/12] crypto: " Jason A. Donenfeld
2018-10-19 18:19 ` Paul Crowley
2018-10-20 3:24 ` Ard Biesheuvel
2018-10-20 5:22 ` Eric Biggers
[not found] ` <2395454e-a0dc-408f-4138-9d15ab5f20b8@esat.kuleuven.be>
2018-10-22 11:20 ` Tomer Ashur
2018-10-19 19:04 ` Eric Biggers
2018-10-20 10:26 ` Milan Broz
2018-10-20 13:47 ` Jason A. Donenfeld
2018-11-16 21:52 ` Eric Biggers
2018-11-17 10:29 ` Milan Broz
2018-11-19 19:28 ` Eric Biggers
2018-11-19 20:05 ` Milan Broz
2018-11-19 20:30 ` Jason A. Donenfeld
2018-10-21 22:23 ` Eric Biggers
2018-10-21 22:51 ` Jason A. Donenfeld
2018-10-22 17:17 ` Paul Crowley
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181020052657.GB876@sol.localdomain \
--to=ebiggers@kernel.org \
--cc=Jason@zx2c4.com \
--cc=ard.biesheuvel@linaro.org \
--cc=gkaiser@google.com \
--cc=herbert@gondor.apana.org.au \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-fscrypt@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mhalcrow@google.com \
--cc=paulcrowley@google.com \
--cc=samuel.c.p.neves@gmail.com \
--cc=tomer.ashur@esat.kuleuven.be \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).