linux-kernel - Re: [PATCH 0/6] Intel Secure Guard Extensions

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Message-ID: <20160509091338.GA4214@intel.com>
Date:	Mon, 9 May 2016 12:13:38 +0300
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"Dr. Greg Wettstein" <greg@...ellic.com>,
	"Austin S. Hemmelgarn" <ahferroin7@...il.com>,
	Pavel Machek <pavel@....cz>, Andy Lutomirski <luto@...nel.org>,
	Borislav Petkov <bp@...e.de>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
	Ingo Molnar <mingo@...nel.org>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Wan Zongshun <Vincent.Wan@....com>
Subject: Re: [PATCH 0/6] Intel Secure Guard Extensions

On Mon, May 09, 2016 at 09:04:09AM +0200, Greg KH wrote:
> On Mon, May 09, 2016 at 08:38:25AM +0300, Jarkko Sakkinen wrote:
> > On Fri, May 06, 2016 at 01:54:14PM +0200, Thomas Gleixner wrote:
> > > On Fri, 6 May 2016, Jarkko Sakkinen wrote:
> > > 
> > > > On Tue, May 03, 2016 at 04:06:27AM -0500, Dr. Greg Wettstein wrote:
> > > > > It would be helpful and instructive for anyone involved in this debate
> > > > > to review the following URL which details Intel's SGX licening
> > > > > program:
> > > > > 
> > > > > https://software.intel.com/en-us/articles/intel-sgx-product-licensing
> > > > 
> > > > I think it would be good  to note that the licensing process is available
> > > > only for Windows. For Linux you can only use debug enclaves at the
> > > > moment. The default LE has "allow-all" policy for debug enclaves.
> > > 
> > > Which makes the feature pretty useless.
> > >  
> > > > > I think the only way forward to make all of this palatable is to
> > > > > embrace something similar to what has been done with Secure Boot.  The
> > > > > Root Enclave Key will need to be something which can be reconfigured
> > > > > by the Platform Owner through BIOS/EFI.  That model would take Intel
> > > > > off the hook from a security perspective and establish the notion of
> > > > > platform trust to be a bilateral relationship between a service
> > > > > provider and client.
> > > > 
> > > > This concern has been raised many times now. Sadly this did not make
> > > > into Skyle but in future we will have one shot MSRs (can be set only
> > > > once per boot cycle) for defining your own root of trust.
> > > 
> > > We'll wait for that to happen.
> > 
> > I fully understand if you (and others) want to keep this standpoint but
> > what if we could get it to staging after I've revised it with suggested
> > changes and internal changes in my TODO? Then it would not pollute the
> > mainline kernel but still would be easily available for experimentation.
> 
> No, staging is not a "dumping ground", it's for code that is not ready
> to be merged, and has some work left to do on it and it shows forward
> progress on that goal.  I don't put things in there that the maintainers
> of the subsystems it affects do not want merged.  See the many previous
> examples of code that has been rejected for staging as examples of this.
> 
> sorry,

NP, point taken.

> greg k-h

/Jarkko