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To: John-Mark Gurney <jmg@funkthat.com>
Subject: Re: always load aesni or load it when cpu supports it
In-reply-to: <20131021183658.GY56872@funkthat.com>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
References: <20131020070022.GP56872@funkthat.com>
 <423D921D-6CE5-49D9-BCED-AB14EB236800@grondar.org>
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Date: Mon, 21 Oct 2013 18:42:36 +0000
Message-ID: <37803.1382380956@critter.freebsd.dk>
Cc: Andre Oppermann <andre@freebsd.org>, Mark R V Murray <mark@grondar.org>,
 freebsd-arch@freebsd.org
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In message <20131021183658.GY56872@funkthat.com>, John-Mark Gurney writes:
>Poul-Henning Kamp wrote this message on Mon, Oct 21, 2013 at 18:32 +0000:

>Clearly you didn't completely read my first email, so you're proposing
>that we ALWAYS use software AES and never use AES-NI?  At least in the
>context of my email, that is what the above statement says...

No, what I'm saying is that we should offer two APIs:  One synchronous
and one for IPSEC and any other async usage (personally I can't think
of any but...)

Those APIs should do whatever is fastest, for the request it gets.

We do *not* want to pollute all crypto-using code with heuristics to
guess which API to call for which request and when.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.