linux-kernel - Re: [PATCH] crypto: serpent - add x86

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Message-ID: <20120530214006.GZ27374@one.firstfloor.org>
Date:	Wed, 30 May 2012 23:40:06 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Johannes Goetzfried 
	<Johannes.Goetzfried@...ormatik.stud.uni-erlangen.de>,
	Jussi Kivilinna <jussi.kivilinna@...et.fi>,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	Tilo Müller 
	<Tilo.Mueller@...ormatik.uni-erlangen.de>
Subject: Re: [PATCH] crypto: serpent - add x86_64/avx assembler implementation

> Can you provide an example where it doesn't work as intended?

It works for the current algorithms except serpent.

> What we could do is to use the cpuid-based probing when an algorithm
> is needed to selectively load the relevant implementations instead
> of all of them.  However, for most algorithms it won't make that
> big a difference since all the available ones will be loaded anyway.

Yes cpuid probing does that.

The only problem is just that serpent does not use cpuid probing.
-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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