From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Hecken Subject: Re: [PATCH] Initialize PIIX3 IDE channels as "enabled" Date: Tue, 13 Mar 2007 12:54:54 +0100 Message-ID: <45F6910E.2000003@bahntechnik.de> References: <45F57685.BA47.005A.0@novell.com> <45F65A4C.1030009@qumranet.com> <64F9B87B6B770947A9F8391472E032160AD71F05@ehost011-8.exch011.intermedia.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: In-Reply-To: <64F9B87B6B770947A9F8391472E032160AD71F05-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@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 Hello, if I apply this patch and revert the bios to the one before 4423 I can install Windows 2000 to with acpi. But after the installation it shows the hal without acpi. The good thing whilst installing I don't have to evoke my kvm script again because restart works. Daniel Hecken Dor Laor schrieb: >>> Gregory Haskins wrote: >>>> This patch initializes the PIIX3 IDE controllers IDE channels as >>> enabled. They were previously unconfigured by QEMU. >>>> IDE devices have been broken on our local lab systems since the >>> introduction of QEMU 0.9.0 (KVM-14). Tracing the Linux driver for > PIIX3 >>> initialization revealed that the "enabled" bits (bit 7 in the > PCI-CONFIG >>> space at address 0x41 and 0x43, port 0 and 1 respectively) were not > set. >>> In a bare-metal system, it would typically be the role of the BIOS to >>> enable something like this, so this solution may be a hack. I > speculate >>> that the real bug may be something introduced into Bochs about the > same >>> time as the 0.9.0 deployment, but I have not investigated this. >>> Nonetheless, unless there is a specific run-time switch to > enable/disable >>> the IDE channels, initializing them in QEMU vs Bochs is probably 6 of > one, >>> half dozen of the other. >>>> >>> Is the bug present in stock qemu-0.9.0? >>> >>> I'm no acpi expert, but this may be related to our acpi breakage. >> I thought so too and guess what? >> We can install Windows with acpi! (The installation is running now, > didn't >> complete yet but it passed the stage it had stucked before! > > Opsss, > I was too fast on the trigger; it didn't solve anything regarding acpi. > No long ago we had a problem on the trunk with windows installation. > It failed if the flag -no-acpi was not used. > When I checked your patch the problem disappeared but when windows > installation completed I discovered that it didn't use the acpi HAL. > So I checked without the patch and got the same result too. > Probably recent commits fixed the crash and from now the -no-acpi flag > is not required during installation. > Well it was a long shot. > >> Good job. >> >>> -- >>> Do not meddle in the internals of kernels, for they are subtle and > quick >> to >>> panic. >>> >>> >>> ---------------------------------------------------------------------- > --- >>> Take Surveys. Earn Cash. Influence the Future of IT >>> Join SourceForge.net's Techsay panel and you'll get the chance to > share >>> your >>> opinions on IT & business topics through brief surveys-and earn cash >>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEV > DEV >>> _______________________________________________ >>> kvm-devel mailing list >>> kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org >>> https://lists.sourceforge.net/lists/listinfo/kvm-devel > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV