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Re: A Question to throw at you guys

From: Richard Braun
Subject: Re: A Question to throw at you guys
Date: Mon, 13 Nov 2006 21:40:44 +0100
User-agent: Mutt/1.5.9i

On Mon, Nov 13, 2006 at 09:30:23PM +0100, Tom Bachmann wrote:
> Richard Braun schrieb:
> > [...] First you suggest using drivers
> > in userspace, isolated from the kernel (that's the "don't trust drivers"
> > part). [...]
> > 
> > From my point of view, I don't see a way to reliably achieve the first
> > part, as hardware devices can be considered as most privileged entities,
> > potentially giving less privileged entities (device drivers) access to
> > most privileged data.

Well, sorry, I did say it, but the first part is actually more than just
userspace drivers, it's also the application of system policies by the
kernel, which I don't think is completely feasible (userspace drivers
are a way to achieve such policy for address spaces, but there are other
privileged resources to control).

Richard Braun

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