From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752913AbeDQPiU (ORCPT ); Tue, 17 Apr 2018 11:38:20 -0400 Received: from mga12.intel.com ([192.55.52.136]:60886 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752800AbeDQPiT (ORCPT ); Tue, 17 Apr 2018 11:38:19 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,464,1517904000"; d="scan'208";a="34049513" Subject: Re: 4.17-rc1: early boot crash on x86_64 & pti To: Aaro Koskinen , Ingo Molnar , linux-kernel@vger.kernel.org References: <20180417150130.GA11166@ak-laptop.emea.nsn-net.net> <20180417152801.GB11166@ak-laptop.emea.nsn-net.net> From: Dave Hansen Message-ID: <951f1bf7-4965-b6f4-fcf8-a22d96f9ef2d@linux.intel.com> Date: Tue, 17 Apr 2018 08:38:18 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180417152801.GB11166@ak-laptop.emea.nsn-net.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/17/2018 08:28 AM, Aaro Koskinen wrote: > >> [ 0.000000] Kernel/User page tables isolation: enabled >> [ 0.000000] ------------[ cut here ]------------ >> [ 0.000000] CPA: called for zero pte. vaddr = ffffffff8d000000 cpa->vaddr = ffffffff8d000000 >> [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/mm/pageattr.c:1189 __cpa_process_fault+0x4d6/0x510 > I started enabling more .config options, and it seems that enabling > CONFIG_XEN_PV does some magic to make booting work... But I shouldn't > need it. You're using "-cpu host". What is your host CPU? Also, could you send along your .config? I'll try to reproduce this.