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From: David Laight <David.Laight@ACULAB.COM>
To: 'Dongsoo Lee' <letrhee@nsr.re.kr>, Herbert Xu
	<herbert@gondor.apana.org.au>, "David S. Miller" <davem@davemloft.net>, "Jens
 Axboe" <axboe@kernel.dk>, Eric Biggers <ebiggers@kernel.org>, "Theodore Y.
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	<tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov
	<bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>, "x86@kernel.org"
	<x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>
CC: "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
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	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v6 RESEND 5/5] crypto: LEA block cipher x86_64
 optimization
Thread-Topic: [PATCH v6 RESEND 5/5] crypto: LEA block cipher x86_64
 optimization
Thread-Index: AQHaRP97Qv3M1SIfYkW1atonfzlDU7DWJB2Q
Date: Fri, 12 Jan 2024 12:59:56 +0000
Message-ID: <cbd8de6ff70849a98faf2fd25b065a94@AcuMS.aculab.com>
References: <20240112022859.2384-1-letrhee@nsr.re.kr>
 <20240112022859.2384-6-letrhee@nsr.re.kr>
In-Reply-To: <20240112022859.2384-6-letrhee@nsr.re.kr>
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From: Dongsoo Lee
> Sent: 12 January 2024 02:29
>=20
> For the x86_64 environment, we use AVX-512F/AVX2/SSE2 instructions.
> Since LEA uses 128-bit blocks of four 32-bit integers, for optimization,
> SSE2 encrypts 4 blocks, AVX2 encrypts 4/8 blocks, and AVX-512F encrypts
> 4/8/16 blocks at a time.
>=20
> Our submission provides a optimized implementation of ECB, CBC
> decryption, CTR, and XTS cipher operation modes on x86_64 CPUs
> supporting.

Given you say in 0/0:

The LEA algorithm is a lightweight block cipher that processes data blocks =
of 128-bits and has three different key lengths, each with a different numb=
er of rounds:

Just how big is it ?
Doesn't look 'lightweight' to me.

=09David

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