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_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 329C2C432C3 for ; Fri, 15 Nov 2019 19:12:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 00BA520679 for ; Fri, 15 Nov 2019 19:12:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726828AbfKOTMC (ORCPT ); Fri, 15 Nov 2019 14:12:02 -0500 Received: from mga04.intel.com ([192.55.52.120]:21836 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726075AbfKOTMB (ORCPT ); Fri, 15 Nov 2019 14:12:01 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Nov 2019 11:12:00 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,309,1569308400"; d="scan'208";a="236177779" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.21]) by fmsmga002.fm.intel.com with ESMTP; 15 Nov 2019 11:12:00 -0800 Received: by tassilo.localdomain (Postfix, from userid 1000) id 2CD843010AB; Fri, 15 Nov 2019 11:12:00 -0800 (PST) Date: Fri, 15 Nov 2019 11:12:00 -0800 From: Andi Kleen To: Thomas Gleixner Cc: "Chang S. Bae" , linux-kernel@vger.kernel.org, bp@alien8.de, luto@kernel.org, hpa@zytor.com, dave.hansen@intel.com, tony.luck@intel.com, ravi.v.shankar@intel.com, markus.t.metzger@intel.com Subject: Re: [PATCH v9 00/17] Enable FSGSBASE instructions Message-ID: <20191115191200.GD22747@tassilo.jf.intel.com> References: <1570212969-21888-1-git-send-email-chang.seok.bae@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 15, 2019 at 07:29:17PM +0100, Thomas Gleixner wrote: > On Fri, 4 Oct 2019, Chang S. Bae wrote: > > > > Updates from v8 [10]: > > * Internalized the interrupt check in the helper functions (Andy L.) > > * Simplified GS base helper functions (Tony L.) > > * Changed the patch order to put the paranoid path changes before the > > context switch changes (Tony L.) > > * Fixed typos (Randy D.) and massaged a few sentences in the documentation > > * Massaged the FSGSBASE enablement message > > That still lacks what Andy requested quite some time ago in the V8 thread: > > https://lore.kernel.org/lkml/034aaf3a-a93d-ec03-0bbd-068e1905b774@kernel.org/ > > "I also think that, before this series can have my ack, it needs an > actual gdb maintainer to chime in, publicly, and state that they have > thought about and tested the ABI changes and that gdb still works on > patched kernels with and without FSGSBASE enabled. I realize that there > were all kinds of discussions, but they were all quite theoretical, and > I think that the actual patches need to be considered by people who > understand the concerns. Specific test cases would be nice, too." > > What's the state of this? Adding Markus. -Andi