From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D497C10F03 for ; Tue, 23 Apr 2019 20:28:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 00C4221773 for ; Tue, 23 Apr 2019 20:28:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727312AbfDWU2a (ORCPT ); Tue, 23 Apr 2019 16:28:30 -0400 Received: from mx2.suse.de ([195.135.220.15]:57990 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726088AbfDWU2a (ORCPT ); Tue, 23 Apr 2019 16:28:30 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 4096EAC94; Tue, 23 Apr 2019 20:28:29 +0000 (UTC) Date: Tue, 23 Apr 2019 22:28:29 +0200 Message-ID: From: Takashi Iwai To: Greg Kroah-Hartman Cc: Paolo Bonzini , Sean Christopherson , Jiri Slaby , linux-kernel@vger.kernel.org Subject: Re: [REGRESSION 5.0.x] Windows XP broken on KVM In-Reply-To: References: <20190418075328.GA19532@kroah.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 18 Apr 2019 10:05:34 +0200, Takashi Iwai wrote: > > On Thu, 18 Apr 2019 09:53:28 +0200, > Greg Kroah-Hartman wrote: > > > > On Thu, Apr 18, 2019 at 09:38:52AM +0200, Takashi Iwai wrote: > > > Hi, > > > > > > we've got a regression report on the recent 5.0.x kernel, starting > > > from 5.0.6, where Windows XP can't boot on KVM any longer. > > > > > > The culprit seems to be the patch > > > KVM: x86: update %rip after emulating IO > > > with the upstream commit 45def77ebf79e2e8942b89ed79294d97ce914fa0. > > > Reverting this alone fixed the problem. > > > > > > The report is found at openSUSE bugzilla: > > > https://bugzilla.suse.com/show_bug.cgi?id=1132694 > > > > > > Is there already a followup fix? If not, we need to revert it from > > > stable, at least. > > > > Is this also a problem in 5.1-rc5? > > Only 5.0.x has been tested, so far. > I'll ask the reporter to try 5.1-rc if Paolo can't reproduce the > problem in his side. The reporter confirmed that the problem is present with the latest 5.1-rc kernel, too. FWIW, it's a Ryzen system. Check the bugzilla URL above for details. thanks, Takashi