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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,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 15BC6C6778A for ; Fri, 29 Jun 2018 19:04:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B392727CB8 for ; Fri, 29 Jun 2018 19:04:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B392727CB8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755359AbeF2TEq (ORCPT ); Fri, 29 Jun 2018 15:04:46 -0400 Received: from mga17.intel.com ([192.55.52.151]:21610 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753127AbeF2TEp (ORCPT ); Fri, 29 Jun 2018 15:04:45 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 12:04:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,287,1526367600"; d="scan'208";a="51547228" Received: from romley-ivt3.sc.intel.com ([172.25.110.60]) by fmsmga008.fm.intel.com with ESMTP; 29 Jun 2018 12:04:28 -0700 Date: Fri, 29 Jun 2018 12:03:48 -0700 From: Fenghua Yu To: Thomas Gleixner Cc: Dave Hansen , Fenghua Yu , Ingo Molnar , H Peter Anvin , Ashok Raj , Alan Cox , Peter Zijlstra , Rafael Wysocki , Tony Luck , Ravi V Shankar , linux-kernel , x86 Subject: Re: [PATCH v2 2/4] x86/split_lock: Align x86_capability to unsigned long to avoid split locked access Message-ID: <20180629190346.GO18979@romley-ivt3.sc.intel.com> References: <1530282807-66555-1-git-send-email-fenghua.yu@intel.com> <1530282807-66555-3-git-send-email-fenghua.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 29, 2018 at 06:35:39PM +0200, Thomas Gleixner wrote: > On Fri, 29 Jun 2018, Dave Hansen wrote: > > Plus what enforces proper alignment for the other capability related > u32 arrays? Do you want me to enforce unsigned long alignment for all that are used by locked BTS/BTR? There are quite a few/many those places. x86_capability is one that is found in boot time. I tried to find split lock issues in (very limited) tests; but so far only find the issue in x86_capability in the tests. Or you think we can push the patches upstream to allow broad test to find and fix the issues? Thanks. -Fenghua