From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: FreeBSD image hangs during boot Date: Mon, 08 Oct 2007 11:39:13 +0200 Message-ID: <4709FAC1.8050502@qumranet.com> References: <47022E7E.3030509@aurel32.net> <47063B31.6000001@bull.net> <20071005135122.GA17767@hall.aurel32.net> <4709E2DF.10701@qumranet.com> <4709E896.1090806@bull.net> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: kvm-devel , Aurelien Jarno To: Laurent Vivier Return-path: In-Reply-To: <4709E896.1090806-6ktuUTfB/bM@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Laurent Vivier wrote: > Avi Kivity wrote: > = >> Aurelien Jarno wrote: >> = >>> It's actually described page 200 of the specifications (page 216 in >>> ACPIspec30.pdf): >>> >>> Note: This descriptor is meant for describing interrupts that are >>> connected to PIC-compatible >>> interrupt controllers, which can only be programmed for >>> Active-High-Edge-Triggered or Active- >>> Low-Level-Triggered interrupts. Any other combination is illegal. >>> The Extended Interrupt >>> Descriptor can be used to describe other combinations. >>> >>> >>> = >>> = >>>> Avi, if you think this anlysis is correct I can provide the patch >>>> changing >>>> "Level" to "Edge"... >>>> >>>> = >>>> = >>> It looks like the solution is either to describe the IRQ with an >>> "Extended Interrupt Descriptor" or to change this value to one of the >>> two allowed values. In the later case we have to make sure it is >>> consistent with the way the PIC works. >>> >>> = >>> = >> The attached patch attempts to override the pci irqs (now limited to 5, >> 9, 10, and 11) to be active high level triggered. Linux boots and >> parses this correctly. Freebsd still fails. >> = > > FreeBSD will fail while ACPI will have Active-High and Level-triggered, e= xcept > if you define, as Aur=E9lien said, an "Extended Interrupt Descriptor" in = ACPI table. > > BTW, I'm not able to boot Debian Sarge (2.6.8-11-amd64-generic) with your= patch > (as before). > > Moreover, I don't understand what this patch resolves... I thought this was the extended interrupt descriptor; sorry my confusion. Meanwhile I changed the dsdt to use the _real_ extended enhanced = advanced improved interrupt descriptor, and freebsd now boots. FC6 and = Windows survived. I'll push this after further testing. -- = Any sufficiently difficult bug is indistinguishable from a feature. ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/