From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: lapic & npt Date: Wed, 04 Jun 2008 18:11:36 +0200 Message-ID: <4846BEB8.1000208@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([66.187.233.31]:34485 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752002AbYFDQLj (ORCPT ); Wed, 4 Jun 2008 12:11:39 -0400 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id m54GBcsO013261 for ; Wed, 4 Jun 2008 12:11:38 -0400 Received: from pobox.stuttgart.redhat.com (pobox.stuttgart.redhat.com [172.16.2.10]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m54GBbrs021227 for ; Wed, 4 Jun 2008 12:11:37 -0400 Received: from zweiblum.travel.kraxel.org (vpn-4-75.str.redhat.com [10.32.4.75]) by pobox.stuttgart.redhat.com (8.13.1/8.13.1) with ESMTP id m54GBaOc022219 for ; Wed, 4 Jun 2008 12:11:36 -0400 Sender: kvm-owner@vger.kernel.org List-ID: Hi, I've just noticed that xenner doesn't work for 64bit xen guest kernels on my new shiny barcelona box. The VM crashes when trying to access the lapic. lapic setup is done before idt setup, register dump looks like init state, thus it most likely is a triple fault resetting the vcpu. Turning off npt fixes it. xenner maps the lapic to ffff820000000000 (64bit guests) or fe900000 (32bit guests). 32bit works fine even with npt enabled. host kernel is fedora 9 with kvm-69 modules. ideas anyone? cheers, Gerd -- http://kraxel.fedorapeople.org/xenner/