linux-kernel - Re: enable dual rng on VIA C7

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Message-ID: <474AFC2F.1040309@xs4all.nl>
Date:	Mon, 26 Nov 2007 18:02:39 +0100
From:	Udo van den Heuvel <udovdh@...all.nl>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org, Michael Buesch <mb@...sch.de>,
	folkert van Heusden <folkert@...heusden.com>
Subject: Re: enable dual rng on VIA C7

Andrew Morton wrote:
> On Sun, 11 Nov 2007 19:49:08 +0100 Udo van den Heuvel <udovdh@...all.nl> wrote:
> 
>> Any reason why the second rng on the VIA C7 CPU is not enabled?
(...)
> Does the patch work?

Yes, at least:

dd if=/dev/hwrng of=/dev/null bs=1024 count=1024
shows a higher speed than without the patch.

> It's missing a signed-off-by:, btw

I did not know we are already that far ;-)
I mean: can this patch be aplied without hurting C3/C7 CPU's with just
one RNG? Maybe an expert needs to test/answer?
Maybe some logic needs to be applied around the extra bit?

Kind regards,
Udo
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