From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MwuS4-0001pb-Tg for qemu-devel@nongnu.org; Sun, 11 Oct 2009 05:10:52 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MwuS0-0001mX-Kf for qemu-devel@nongnu.org; Sun, 11 Oct 2009 05:10:52 -0400 Received: from [199.232.76.173] (port=41637 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MwuS0-0001mR-GT for qemu-devel@nongnu.org; Sun, 11 Oct 2009 05:10:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35807) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MwuRz-00062t-Ux for qemu-devel@nongnu.org; Sun, 11 Oct 2009 05:10:48 -0400 Message-ID: <4AD1A112.4070303@redhat.com> Date: Sun, 11 Oct 2009 11:10:42 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] Re: [PATCH v2 4/9] provide in-kernel apic References: <1254953315-5761-1-git-send-email-glommer@redhat.com> <1254953315-5761-2-git-send-email-glommer@redhat.com> <1254953315-5761-3-git-send-email-glommer@redhat.com> <1254953315-5761-4-git-send-email-glommer@redhat.com> <1254953315-5761-5-git-send-email-glommer@redhat.com> <4ACDEF42.6020706@us.ibm.com> <4ACDF297.9010303@redhat.com> <20091008142202.GR8092@mothafucka.localdomain> <20091009100641.GC6576@shareable.org> <20091009143031.GU8092@mothafucka.localdomain> <20091009164831.GB7393@shareable.org> <4ACF93D5.3010002@us.ibm.com> In-Reply-To: <4ACF93D5.3010002@us.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Glauber Costa , qemu-devel@nongnu.org, kvm-devel On 10/09/2009 09:49 PM, Anthony Liguori wrote: >> If I've just been sent an image produced by someone running KVM, and >> my machine is not KVM-capable, or I cannot upgrade the KVM kernel >> module because it's in use by other VMs (had this problem a few >> times), there's no choice but to change the irqchipness. > > > You cannot migrate from KVM to TCG so this use-case is irrelevant. I agree it's mostly irrelevant, however nothing in principle prevents such a migration, as long as the cpuid feature bits are implemented on both sides. -- error compiling committee.c: too many arguments to function