From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: Nested Virtualization Of Hyper-V 2K8R2 Date: Tue, 18 Oct 2011 18:34:33 +0200 Message-ID: <20111018163433.GI1512@8bytes.org> References: <4E9D643F.5070608@suresafe.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "kvm@vger.kernel.org" To: Jim Return-path: Received: from 8bytes.org ([88.198.83.132]:34904 "EHLO 8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750784Ab1JRQpN (ORCPT ); Tue, 18 Oct 2011 12:45:13 -0400 Content-Disposition: inline In-Reply-To: <4E9D643F.5070608@suresafe.co.uk> Sender: kvm-owner@vger.kernel.org List-ID: Hi Jim, On Tue, Oct 18, 2011 at 12:34:23PM +0100, Jim wrote: > I've worked with KVM for quite a while now but have come across a > problem when trying to run some W2K8R2 VMs where I want to also run > Hyper-V on those VMs - nested virtualization. > > I've researched and checked the obvious AMD processor with the enable > nested flag, running a kvm guest with the nesting support enabled etc. > which did allow me to add the Hyper-V role to the VM but when it > reboots, the machine hardware lists a problem with the VM machine bus > and no hyper-v VMs can be created. Can you share the qemu command line you used to start the VM? > From what I've read through from lurking on the list and reading the > archives, I'm not sure whether the problem is that KVM is not ready to > support Hyper-V yet or if I'm doing it wrong. > > I'd be very thankful if someone could say if I'm hoping for too much > right now or point me where to go to find some details on what I'm > doing wrong and how to do it right. I also had issues with Hyper-V. But at least the root-domain should boot up without problems. I also started a Linux guest inside but that got stuck at some point in the kernel boot process. I havn't debugged that further yet, though. Joerg