From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamie Lokier Subject: Re: [Qemu-devel] [PATCH] Reinstate cpuid vendor override when kvm is enabled Date: Tue, 29 Dec 2009 13:28:41 +0000 Message-ID: <20091229132841.GC5736@shareable.org> References: <1261990080-15330-1-git-send-email-avi@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Marcelo Tosatti , qemu-devel@nongnu.org, kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from mail2.shareable.org ([80.68.89.115]:60129 "EHLO mail2.shareable.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751237AbZL2N2o (ORCPT ); Tue, 29 Dec 2009 08:28:44 -0500 Content-Disposition: inline In-Reply-To: <1261990080-15330-1-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > Due to upstream qemu changes we no longer expose the host cpu vendor id > to the guest. This leads to failures when the syscall/sysenter instructions > are used in compatibility mode. > > Change the default to override when kvm is enabled. This is a good change, although it always bothers me when there has to be a difference between kvm-enabled and kvm-disabled, because I run some guests in both modes at different times. Out of interest, are the guest-visible differences between kvm-enabled mode and kvm-disabled mode documented somewhere? Thanks, -- Jamie