From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: Regression problem with commit 5045b46803
Date: Sun, 17 Aug 2014 08:17:40 +0200
Message-ID: <53F04904.3070206@redhat.com>
References: <53EB9D00.3050806@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Cc: kvm@vger.kernel.org
To: Nadav Amit <nadav.amit@gmail.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from mail-we0-f176.google.com ([74.125.82.176]:60959 "EHLO
	mail-we0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1750786AbaHQGRp (ORCPT <rfc822;kvm@vger.kernel.org>);
	Sun, 17 Aug 2014 02:17:45 -0400
Received: by mail-we0-f176.google.com with SMTP id q58so3717080wes.7
        for <kvm@vger.kernel.org>; Sat, 16 Aug 2014 23:17:44 -0700 (PDT)
In-Reply-To: <53EB9D00.3050806@gmail.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Il 13/08/2014 19:14, Nadav Amit ha scritto:
> Commit 5045b46803 added a check that cs.dpl equals cs.rpl during
> task-switch. Unfortunately, is causes some of my tests that run well on
> bare-metal to fail.
> 
> Although this check is mentioned in table 7-1 of the SDM as causing a
> #TSS exception, it is not mentioned in table 6-6 that lists "invalid TSS
> conditions" which cause #TSS exceptions.
> 
> Thus, I recommend on reverting commit 5045b46803, or alternatively
> rechecking task-switch behavior on bare-metal.

Can you provide a kvm-unit-tests test for this?

Paolo