linux-kernel - Re: [RFC v4][PATCH 2/2] intel_txt: Intel(R) TXT and tboot kernel support

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Message-ID: <20090619212255.GB2229@elf.ucw.cz>
Date:	Fri, 19 Jun 2009 23:22:55 +0200
From:	Pavel Machek <pavel@....cz>
To:	Valdis.Kletnieks@...edu
Cc:	James Morris <jmorris@...ei.org>,
	Joseph Cihula <joseph.cihula@...el.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	arjan@...ux.intel.com, hpa@...or.com, andi@...stfloor.org,
	Chris Wright <chrisw@...s-sol.org>, jbeulich@...ell.com,
	peterm@...hat.com, gang.wei@...el.com, shane.wang@...el.com
Subject: Re: [RFC v4][PATCH 2/2] intel_txt: Intel(R) TXT and tboot kernel
	support


> > > > Linux support for Intel(R) Trusted Execution Technology.
> > > 
> > > > Signed-off-by:  Joseph Cihula <joseph.cihula@...el.com>
> > > > Signed-off-by:  Shane Wang <shane.wang@...el.com>
> > > > Signed-off-by:  Gang Wei <gang.wei@...el.com>
> > > 
> > > Reviewed-by: James Morris <jmorris@...ei.org>
> > > 
> > > There have been no comments on this since you posted it, so we might 
> > > assume there are no further technical issues.
> > 
> > I believe the code at best useless and at worst dangerous. We don't
> > merge useless code to the kernel.
> > 
> > What are non-evil uses of this code?
> 
> Yes, most of the uses contemplated for this are for evil DRM schemes.  On the
> other hand, the code is equally useful to help make sure that mo miscreant has
> snuck evil DRM (or other evil code) in behind my back.
> 
> "Somebody has screwed with this kernel image, and you're not booting what you
> thought you were booting."
> 
> Seems worth it to me.

Unfortunately, I do not think you can boot linux kernel under TXT
sandbox. (Is there some code that you can boot under TXT sandbox? If
so, where?)
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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