From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Paravirt KVM capabilities Date: Tue, 09 Jan 2007 16:27:14 +0200 Message-ID: <45A3A642.1030604@qumranet.com> References: <20070109141916.GA13276@vlad.carfax.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: To: Hugo Mills , kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org In-Reply-To: <20070109141916.GA13276-qdzjUQGjHNdnxAzMjxVBUbVCufUGDwFn@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 Hugo Mills wrote: > I'm a little unclear on the capabilities (current or planned) of > the new paravirtualisation feature in KVM. > > Does running paravirtual guests on KVM still require a > hardware-VM-capable processor, or will it eventually be possible to > run a paravirtualised Linux on an older machine (such as, say, a > first-generation Athlon 64)? > If the code comes in to support it, and if it doesn't hurt full hardware virtualization, kvm can be extended to support it. I have no plans to work on it myself but will review and accept patches. It's also something for the Linux community in general to decide: if we want separate interfaces for paravirtualization and full virtualization (lhype and kvm) or a merged interface. I can see arguments in favor of both positions. > As a follow-up question, would it be possible then to run a 32-bit > guest on a 64-bit host? That is possible now, and hopefully will continue to be possible. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- 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