From owner-cvs-all@FreeBSD.ORG Wed Mar 29 19:22:31 2006 Return-Path: X-Original-To: cvs-all@FreeBSD.org Delivered-To: cvs-all@FreeBSD.org Received: from green.homeunix.org (freefall.freebsd.org [216.136.204.21]) by hub.freebsd.org (Postfix) with ESMTP id 7093916A400; Wed, 29 Mar 2006 19:22:31 +0000 (UTC) (envelope-from green@green.homeunix.org) Received: from green.homeunix.org (green@localhost [127.0.0.1]) by green.homeunix.org (8.13.4/8.13.1) with ESMTP id k2TJMUAm002479; Wed, 29 Mar 2006 14:22:30 -0500 (EST) (envelope-from green@green.homeunix.org) Received: (from green@localhost) by green.homeunix.org (8.13.4/8.13.1/Submit) id k2TJMUxG002478; Wed, 29 Mar 2006 14:22:30 -0500 (EST) (envelope-from green) Date: Wed, 29 Mar 2006 14:22:30 -0500 From: Brian Fundakowski Feldman To: Nate Lawson Message-ID: <20060329192230.GH68291@green.homeunix.org> References: <200603290641.k2T6fuMM008597@repoman.freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200603290641.k2T6fuMM008597@repoman.freebsd.org> User-Agent: Mutt/1.5.11 Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/acpica/Osd OsdHardware.c X-BeenThere: cvs-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the entire tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Mar 2006 19:22:31 -0000 On Wed, Mar 29, 2006 at 06:41:56AM +0000, Nate Lawson wrote: > njl 2006-03-29 06:41:56 UTC > > FreeBSD src repository > > Modified files: > sys/dev/acpica/Osd OsdHardware.c > Log: > Add a blacklist for bad IO ports that AML should never touch. It seems > some systems were designed so that AML writes to various resources shared > with OS drivers, including the RTC, PIC, PCI, etc. These writes could > collide with writes by the OS and should never be performed. For now, we > print a message if such an access occurs, but do not block it. To block > the access, the tunable "debug.acpi.block_bad_io" can be set to 1. In the > future, we will flip the switch and this will become the default. > > Information about this problem was found in Microsoft KB 283649. They > block IO accesses if the BIOS indicates via _OSI that it is Windows 2001 > or higher. They always block accesses to the PIC, cascaded PIC, and ELCRs, > no matter how old the BIOS. Windows 2001 or higher? -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green@FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\