From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Magenheimer Subject: RE: A simple question of CPU emulation in Xen Date: Fri, 13 May 2011 10:39:09 -0700 (PDT) Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110513155110.56ca976c@lxorguk.ukuu.org.uk> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Alan Cox , MaoXiaoyun Cc: xen devel List-Id: xen-devel@lists.xenproject.org > From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk] > Subject: Re: [Xen-devel] A simple question of CPU emulation in Xen >=20 > On Fri, 13 May 2011 22:41:44 +0800 > MaoXiaoyun wrote: >=20 > > > > Hi : > > > > I have a simple question on CPU emulation in Xen. > > > > Currently, inside guest, we can see that the CPU information > incluing types and frequency is exactly > > same as physical CPU. Is it possible for Xen(or qemu) to emulate a > different type of CPU. That is inside > > guest, we see a different CPU types? >=20 > Qemu supports a huge range of CPU and platform emulations, > www.qemu.org. > Most of this falls outside of Xen as Qemu doesn't need or benefit from > Xen or KVM when doing cross cpu emulation. Also see "MagiXen: Combining Binary Translation and Virtualization" here: http://www.hpl.hp.com/techreports/2007/HPL-2007-77.html=20