From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933229Ab3BSRsB (ORCPT ); Tue, 19 Feb 2013 12:48:01 -0500 Received: from mail.skyhub.de ([78.46.96.112]:51273 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933136Ab3BSRsA (ORCPT ); Tue, 19 Feb 2013 12:48:00 -0500 Date: Tue, 19 Feb 2013 18:47:58 +0100 From: Borislav Petkov To: "H. Peter Anvin" Cc: Ingo Molnar , Boris Ostrovsky , Linus Torvalds , linux-kernel@vger.kernel.org, Thomas Gleixner , Andrew Morton Subject: Re: [GIT PULL] x86/cpu changes for v3.9 Message-ID: <20130219174758.GB4465@pd.tnic> Mail-Followup-To: Borislav Petkov , "H. Peter Anvin" , Ingo Molnar , Boris Ostrovsky , Linus Torvalds , linux-kernel@vger.kernel.org, Thomas Gleixner , Andrew Morton References: <20130219152503.GA14862@gmail.com> <20130219153655.GD26748@pd.tnic> <20130219154721.GA15876@gmail.com> <5123B897.9010607@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5123B897.9010607@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 19, 2013 at 09:38:31AM -0800, H. Peter Anvin wrote: > My fault... I was tracking the fix and lost track of the thread. > > The problem is that the fix is necessary but not sufficient, as it > introduces an undesirable host-guest dependency. In order to allow > neerw guests to work on older hosts we also should use the > {rd,wr}msr_safe() functions to manipulate this MSR, with a comment > as to why. > > Boris, could you prepare such a patch, please? I don't think Boris O. is at AMD anymore. Want me to add that to my fix for kvm or prep a separate patch? -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --