From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: lapic & npt Date: Fri, 27 Jun 2008 16:42:05 +0200 Message-ID: <4864FC3D.2080508@redhat.com> References: <4846BEB8.1000208@redhat.com> <4846BFE0.8070507@qumranet.com> <48494D82.4030803@redhat.com> <4849661F.2050908@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from mx1.redhat.com ([66.187.233.31]:41289 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759621AbYF0OmQ (ORCPT ); Fri, 27 Jun 2008 10:42:16 -0400 In-Reply-To: <4849661F.2050908@qumranet.com> Sender: kvm-owner@vger.kernel.org List-ID: Hi, >> Figured meanwhile the instruction accessing the lapic register somehow >> beames me into my gpf handler. With a quite strange rsp value. Hmm. >> To be analyzed further after kvm forum I guess, unless someone has a >> bright idea ... > x86-64 will gpf if an address is not canonical. ffff820000000000 is > canonical, but perhaps a type killed a zero somewhere? Doesn't look like. Tried to analyze that. Compiled lastest kvm.git kernel (to get kvmtrace support), booted, and noticed "kvm-amd npt=0" doesn't work at all ... cheers, Gerd -- http://kraxel.fedorapeople.org/xenner/