linux-kernel - Re: [RFC PATCH crypto 4/4] AES-NI: Add support to Intel AES-NI instructions for x86

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Message-ID: <20090112030645.GA2651@gondor.apana.org.au>
Date:	Mon, 12 Jan 2009 14:06:45 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Sebastian Siewior <linux-crypto@...breakpoint.cc>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
Subject: Re: [RFC PATCH crypto 4/4] AES-NI: Add support to Intel AES-NI
	instructions for x86_64 platform

On Mon, Jan 12, 2009 at 10:30:23AM +0800, Huang Ying wrote:
>
> With this method, we can allocate only one cryptd tfm internally,
> without dedicated blkcipher tfm. If kernel is using FPU, crypd tfm is
> used, otherwise, the underlying blkcipher tfm is used directly.

I'm not sure what you're saying here.  But the blkcipher object
is reentrant.  Meaning that it can be used simultaneously on two
CPUs as long as you don't change the key under it.

Cheers,
-- 
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