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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 92376C10F03 for ; Wed, 24 Apr 2019 00:18:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A26B2089F for ; Wed, 24 Apr 2019 00:18:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728964AbfDXASn (ORCPT ); Tue, 23 Apr 2019 20:18:43 -0400 Received: from mga02.intel.com ([134.134.136.20]:18963 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728353AbfDXASm (ORCPT ); Tue, 23 Apr 2019 20:18:42 -0400 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Apr 2019 17:18:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,387,1549958400"; d="scan'208";a="340208899" Received: from sjchrist-coffee.jf.intel.com (HELO linux.intel.com) ([10.54.74.181]) by fmsmga006.fm.intel.com with ESMTP; 23 Apr 2019 17:18:41 -0700 Date: Tue, 23 Apr 2019 17:18:41 -0700 From: Sean Christopherson To: Greg Kroah-Hartman Cc: Paolo Bonzini , Takashi Iwai , Jiri Slaby , linux-kernel@vger.kernel.org Subject: Re: [REGRESSION 5.0.x] Windows XP broken on KVM Message-ID: <20190424001841.GA14422@linux.intel.com> References: <20190423202317.GA15182@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190423202317.GA15182@kroah.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 23, 2019 at 10:23:17PM +0200, Greg Kroah-Hartman wrote: > On Thu, Apr 18, 2019 at 09:56:02AM +0200, Paolo Bonzini wrote: > > On 18/04/19 09:38, 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. > > > > No, it's the first time I hear this and I actually test Windows XP > > before every pull request I send to Linus... I'll download 5.0.x and > > test it there. > > Any further ideas about this? I followed up on the bugzilla to request more information. My best guess at this point is that the issue is related to an older version of Qemu or a specific emulated device, but without additional details we're stuck.