Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756273Ab3GKUCq (ORCPT ); Thu, 11 Jul 2013 16:02:46 -0400 Received: from sous-sol.org ([216.99.217.87]:49331 "EHLO sequoia2.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751050Ab3GKUCo (ORCPT ); Thu, 11 Jul 2013 16:02:44 -0400 Date: Thu, 11 Jul 2013 12:00:54 -0700 From: Chris Wright To: Guenter Roeck Cc: Chris Wright , Bjorn Helgaas , David Woodhouse , "linux-kernel@vger.kernel.org" , "open list:INTEL IOMMU (VT-d)" Subject: Re: WARNING: at drivers/iommu/dmar.c:484 warn_invalid_dmar with Intel Motherboard Message-ID: <20130711190054.GC24833@sequoia2.sous-sol.org> References: <20130709202406.GA11867@roeck-us.net> <20130709223106.GA16429@roeck-us.net> <20130709232252.GB2676@sequoia2.sous-sol.org> <20130709234331.GA10833@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130709234331.GA10833@roeck-us.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 659 Lines: 17 * Guenter Roeck (linux@roeck-us.net) wrote: > On Tue, Jul 09, 2013 at 04:22:52PM -0700, Chris Wright wrote: > > One thing I've seen is the BIOS zeroing the base register address when > > VT-d is disabled in BIOS. So, Guenter, a "fix" may be simply enabling > > VT-d in the BIOS. > > > Ah, yes, I think I may have that disabled. I'll check it tonight. Did you find out if BIOS change fixed this? thanks, -chris -- 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/