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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 E4B88C433E0 for ; Sat, 23 May 2020 04:19:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC53F207DA for ; Sat, 23 May 2020 04:19:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728121AbgEWETa (ORCPT ); Sat, 23 May 2020 00:19:30 -0400 Received: from mga01.intel.com ([192.55.52.88]:13131 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725294AbgEWET3 (ORCPT ); Sat, 23 May 2020 00:19:29 -0400 IronPort-SDR: Keyzep65a6EtPqBqxEVdyUlXeauHDlRuhIX2DaRAgMtDcvm52Q1Ont+y2n3qcLJfDDmUMoiq/g hFZ/KrCpmDfA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 May 2020 21:19:29 -0700 IronPort-SDR: rpiurWJ+oFUBqukQpqVgrxtkeoWbz5PLleNm/cebf4hgnIWdDiecDJMq06DaOoVkyYVDps+yT/ YTe87xmjt94w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,424,1583222400"; d="scan'208";a="467494390" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.21]) by fmsmga006.fm.intel.com with ESMTP; 22 May 2020 21:19:28 -0700 Received: by tassilo.localdomain (Postfix, from userid 1000) id 4D93F301A90; Fri, 22 May 2020 21:19:28 -0700 (PDT) Date: Fri, 22 May 2020 21:19:28 -0700 From: Andi Kleen To: Don Porter Cc: Jarkko Sakkinen , Thomas Gleixner , Sasha Levin , 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, chang.seok.bae@intel.com Subject: Re: Re: [PATCH v12 00/18] Enable FSGSBASE instructions Message-ID: <20200523041928.GU499505@tassilo.jf.intel.com> References: <20200511045311.4785-1-sashal@kernel.org> <0186c22a8a6be1516df0703c421faaa581041774.camel@linux.intel.com> <20200515164013.GF29995@sasha-vm> <20200518153407.GA499505@tassilo.jf.intel.com> <371e6a92cad25cbe7a8489785efa7d3457ecef3b.camel@linux.intel.com> <87v9ksvoaq.fsf@nanos.tec.linutronix.de> <20200519164853.GA19706@linux.intel.com> <7eb45e02-03bf-0af0-c915-794bf49d66d7@cs.unc.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7eb45e02-03bf-0af0-c915-794bf49d66d7@cs.unc.edu> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Setting the fs register in userspace is an essential feature for running > legacy code in SGX. We have been following LKML discussions on this > instruction for years, and hoping this feature would be supported by Linux, If you need a feature you should comment on it. One of the reasons it took so long is that the users didn't speak up. -Andi