From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MgaBs-0006n6-6p for qemu-devel@nongnu.org; Thu, 27 Aug 2009 04:18:40 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MgaBn-0006m4-Fw for qemu-devel@nongnu.org; Thu, 27 Aug 2009 04:18:39 -0400 Received: from [199.232.76.173] (port=42607 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MgaBn-0006m1-Cg for qemu-devel@nongnu.org; Thu, 27 Aug 2009 04:18:35 -0400 Received: from mail2.shareable.org ([80.68.89.115]:35260) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MgaBn-0007gJ-32 for qemu-devel@nongnu.org; Thu, 27 Aug 2009 04:18:35 -0400 Date: Thu, 27 Aug 2009 09:18:32 +0100 From: Jamie Lokier Subject: Re: [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus Message-ID: <20090827081832.GA22631@shareable.org> References: <1249836296-13288-1-git-send-email-avi@redhat.com> <1249836296-13288-3-git-send-email-avi@redhat.com> <4A955CB4.4080205@redhat.com> <4A955D6A.9060804@redhat.com> <4A95633E.7060703@redhat.com> <20090826190944.GD11762@redhat.com> <4A963856.2040301@redhat.com> <20090827075728.GJ30093@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090827075728.GJ30093@redhat.com> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gleb Natapov Cc: qemu-devel@nongnu.org, Gerd Hoffmann , Avi Kivity Gleb Natapov wrote: > On Thu, Aug 27, 2009 at 09:40:06AM +0200, Gerd Hoffmann wrote: > > Or does it mean we must emulate a more recent chipset? > > > That too will work. Note that if you change the chipset, it'll break some existing Windows VMs. I had this problem when porting a Windows Server 2003 VM from Virtual PC to QEMU: Virtual PC emulates a PIIX4, while QEMU provides a PIIX3 (even though there's a PIIX4 in the source code, it's not used for PC emulation). The ported image would not boot because of the change of chipset, until I patched the registry to accomodate the change. It will be the same the other way: When some Windows VMs see a change from PIIX3 to a later chipset, they will not boot. Some Windows VMs don't care as much. XP seems to be more like Linux, in that it adapts to different devices at boot time. -- Jamie > > -- > Gleb. > >