From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Shuklin Subject: Re: Running domU in ring 2 Date: Mon, 12 Dec 2011 03:43:24 +0400 Message-ID: <4EE5401C.9050702@gmail.com> References: <63429.71.199.121.110.1323642496.squirrel@webmail.cs.cmu.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <63429.71.199.121.110.1323642496.squirrel@webmail.cs.cmu.edu> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Where is your ring 2 in x86_64 architecture? They killed It! On 12.12.2011 02:28, Olatunji Ruwase wrote: > Hello, > I am curious as to whether it is possible/practical to run a PV driver > domain in the x86 protection ring 2 as opposed to ring 1. I m working on > using hardware logging to capture instruction-grained traces of > kernel-mode device drivers. My implementation is based on running Xen 3.3 > on Simics simulated hardware. Distinguishing the kernel-mode executions > of the dom0 and domU (driver domain) in the simulation framework will be > easier if the kernels ran in different rings, dom0 in ring 1 and domU in > ring 2. > > Thanks, > > tunji > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel