From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753635AbYJFP31 (ORCPT ); Mon, 6 Oct 2008 11:29:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752641AbYJFP3T (ORCPT ); Mon, 6 Oct 2008 11:29:19 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:56733 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751633AbYJFP3S (ORCPT ); Mon, 6 Oct 2008 11:29:18 -0400 Date: Mon, 6 Oct 2008 16:29:14 +0100 From: Alan Cox To: Arjan van de Ven Cc: Maxim Levitsky , linux-kernel@vger.kernel.org Subject: Re: RFC: banning device driver reserved resources from /dev/mem Message-ID: <20081006162914.4f140938@lxorguk.ukuu.org.uk> In-Reply-To: <20081006075738.318a983f@infradead.org> References: <20081005180154.7cc12486@infradead.org> <20081006102739.16d1a434@lxorguk.ukuu.org.uk> <48EA1540.8060409@gmail.com> <20081006144835.6e58f73a@lxorguk.ukuu.org.uk> <20081006065213.76dc729a@infradead.org> <20081006150122.3860cae1@lxorguk.ukuu.org.uk> <20081006070543.23b14828@infradead.org> <20081006151411.05ed5f50@lxorguk.ukuu.org.uk> <20081006072437.5d1360dd@infradead.org> <20081006153825.66e50770@lxorguk.ukuu.org.uk> <20081006075738.318a983f@infradead.org> X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.12; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 6 Oct 2008 07:57:38 -0700 Arjan van de Ven wrote: > > > > For debug tools that would be almost all drivers, and for distribution > > use that needs to be a runtime selection. > > is boottime (read: kernel parameter) ok ? > it would totally make sense to have a kernel boot parameter that > disables all /dev/mem sanity checks. A boot parameter probably catches most cases yes. > that's a hard case but probably not the most interesting case; drivers > get loaded early thankfully. > (yes revoke is hard ;( ) Yeah .. I was hoping you'd write it ;)