Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751407AbVKYEHN (ORCPT ); Thu, 24 Nov 2005 23:07:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751408AbVKYEHN (ORCPT ); Thu, 24 Nov 2005 23:07:13 -0500 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:41823 "EHLO pd2mo1so.prod.shaw.ca") by vger.kernel.org with ESMTP id S1751407AbVKYEHL (ORCPT ); Thu, 24 Nov 2005 23:07:11 -0500 Date: Thu, 24 Nov 2005 22:06:36 -0600 From: Robert Hancock Subject: Re: [RFC] Small PCI core patch In-reply-to: <5bHtG-228-23@gated-at.bofh.it> To: linux-kernel Message-id: <43868DCC.9090101@shaw.ca> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Accept-Language: en-us, en References: <5bsXq-5uy-3@gated-at.bofh.it> <5bsXq-5uy-1@gated-at.bofh.it> <5btqF-66n-41@gated-at.bofh.it> <5bzmg-66b-1@gated-at.bofh.it> <5bHtG-228-23@gated-at.bofh.it> User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 853 Lines: 20 Jeff Garzik wrote: > One sticking point is validation: ensuring userspace cannot cause > invalid GPU microcode to be generated. [I can just hear Al Viro > swearing, just thinking about creating secure compilers...] I suspect the amount of data going through is large enough that this wouldn't really be practical. I think you'd have to deal with the code generating GPU instructions having to be trusted and have the device interface require root privileges.. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/