From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935068AbaKNBUt (ORCPT ); Thu, 13 Nov 2014 20:20:49 -0500 Received: from mga11.intel.com ([192.55.52.93]:62277 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934683AbaKNBUq convert rfc822-to-8bit (ORCPT ); Thu, 13 Nov 2014 20:20:46 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,381,1413270000"; d="scan'208";a="622133703" From: "Luck, Tony" To: Andy Lutomirski CC: Oleg Nesterov , Borislav Petkov , X86 ML , "linux-kernel@vger.kernel.org" , Peter Zijlstra , "Andi Kleen" Subject: Re: [RFC PATCH] x86, entry: Switch stacks on a paranoid entry from userspace Thread-Topic: [RFC PATCH] x86, entry: Switch stacks on a paranoid entry from userspace Thread-Index: AQHP/s7+MsolZCiViEiCPzqCVeTRAJxdoOwAgACR1oD//3yvMIAAtdCAgAB2NOCAAM3pAP//e6+AgACK+ACAAAdiAIAAGwAA//+CZiU= Date: Fri, 14 Nov 2014 01:20:43 +0000 Message-ID: References: <20141112220058.GA5295@redhat.com> <3908561D78D1C84285E8C5FCA982C28F3292BAB4@ORSMSX114.amr.corp.intel.com> <3908561D78D1C84285E8C5FCA982C28F3292BD44@ORSMSX114.amr.corp.intel.com> <3908561D78D1C84285E8C5FCA982C28F3292CB9A@ORSMSX114.amr.corp.intel.com> <3908561D78D1C84285E8C5FCA982C28F3292D57B@ORSMSX114.amr.corp.intel.com> , In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "worst == MCE_AR_SEVERITY but regs->cs == 0 (i.e. in kernel)" This can't happen. We can only declare AR severity for a user mode fault. Sent from my iPhone > On Nov 13, 2014, at 16:50, Andy Lutomirski wrote: > > worst == > MCE_AR_SEVERITY but regs->cs == 0 (i.e. in kernel)