linux-kernel - Re: [RFC v3][PATCH 2/2] intel_txt: Intel(R) TXT and tboot kernel support

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Message-ID: <20090529094753.GA21928@elf.ucw.cz>
Date:	Fri, 29 May 2009 11:47:54 +0200
From:	Pavel Machek <pavel@....cz>
To:	rms <rms@....org>
Cc:	Theodore Tso <tytso@....edu>, joseph.cihula@...el.com,
	jmorris@...ei.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	arjan@...ux.intel.com, hpa@...or.com, andi@...stfloor.org,
	chrisw@...s-sol.org, jbeulich@...ell.com, peterm@...hat.com,
	gang.wei@...el.com, shane.wang@...el.com, gnu@...d.com
Subject: Re: [RFC v3][PATCH 2/2] intel_txt: Intel(R) TXT and tboot kernel
	support

On Wed 2009-05-27 13:15:14, rms wrote:
> This scheme must be very different from anything I've heard of before.
> Can you tell me where to find a description?
> I want to study whether it really avoids being affected by GPLv3,
> and how we can fight against it.

Some description is here:
http://en.wikipedia.org/wiki/Trusted_Execution_Technology .

And yes, I believe it avoids GPLv3: TXT allows user (I _hope_ it is
root-only) to boot tamper-free sandbox. As long as Windows (or
something) runs in the sandbox, I believe even GPLv3 would allow that.

OTOH... I do not think mainline kernel should support this. It does
not add anything to the user's security, and allows all kinds of nasty
DRMs.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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