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Message-ID: <482CBCC6.6010905@garzik.org>
Date: Thu, 15 May 2008 18:44:22 -0400
From: Jeff Garzik <jeff@garzik.org>
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To: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
CC: Theodore Tso <tytso@mit.edu>, Chris Peterson <cpeterso@cpeterso.com>,
       "Kok, Auke" <auke-jan.h.kok@intel.com>, Rick Jones <rick.jones2@hp.com>,
       "Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>, netdev@vger.kernel.org,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drivers/net: remove network drivers' last few uses of
 IRQF_SAMPLE_RANDOM
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Henrique de Moraes Holschuh wrote:
> If anyone wants to poke at it, get the Debian rng-tools source package.
> It directly supports the VIA PadLock in userspace in a suitably paranoid
> mode (checks that the RNG was not reprogrammed at every read), and does
> multithreading so that FIPS and output processing does not block (nor
> gets blocked) by /dev/hw_random reading, etc.


Neat.  I always did prefer VIA padlock in userspace.

I just sorta assumed a buffering, interrupt-driver TPM RNG driver would 
be better than doing it from userspace, but maybe that was a bad 
assumption to make on my part.  It should be quite doable to support TPM 
RNG entirely via userspace, at any rate.

	Jeff