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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 68F85C04EBB for ; Sat, 24 Nov 2018 16:46:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C08B20874 for ; Sat, 24 Nov 2018 16:46:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C08B20874 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.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 S1726296AbeKYDe7 (ORCPT ); Sat, 24 Nov 2018 22:34:59 -0500 Received: from mga04.intel.com ([192.55.52.120]:18828 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725774AbeKYDe7 (ORCPT ); Sat, 24 Nov 2018 22:34:59 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Nov 2018 08:46:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,273,1539673200"; d="scan'208";a="108940436" Received: from asalamon-mobl1.ger.corp.intel.com (HELO localhost) ([10.249.254.95]) by fmsmga004.fm.intel.com with ESMTP; 24 Nov 2018 08:45:39 -0800 Date: Sat, 24 Nov 2018 08:45:34 -0800 From: Jarkko Sakkinen To: "Dr. Greg" Cc: Andy Lutomirski , X86 ML , Platform Driver , linux-sgx@vger.kernel.org, Dave Hansen , "Christopherson, Sean J" , nhorman@redhat.com, npmccallum@redhat.com, "Ayoun, Serge" , shay.katz-zamir@intel.com, haitao.huang@linux.intel.com, Andy Shevchenko , Thomas Gleixner , "Svahn, Kai" , mark.shanahan@intel.com, Suresh Siddha , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Darren Hart , Andy Shevchenko , LKML Subject: Re: [PATCH v17 18/23] platform/x86: Intel SGX driver Message-ID: <20181124164534.GC30310@linux.intel.com> References: <20181116010412.23967-1-jarkko.sakkinen@linux.intel.com> <20181116010412.23967-19-jarkko.sakkinen@linux.intel.com> <20181119161917.GF13298@linux.intel.com> <20181120120442.GA22172@linux.intel.com> <20181122111253.GA31150@wind.enjellic.com> <20181123103923.GA13851@wind.enjellic.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181123103923.GA13851@wind.enjellic.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 23, 2018 at 04:39:23AM -0600, Dr. Greg wrote: > Jarkko, when this driver lands it will set the SGX ABI in stone for > Linux. It would be very, very helpful to the development community if > there was some official guidance from Intel on whether or not FLC will > be a universal feature on all hardware and the date that is going to > happen or has happened. I seriously don't know but I can take this message to the mothership... > If this turns out to be an OEM selectable issue via firmware > customizations, things will be even more problematic. Point taken. > As things stand now, the proposed mainline SGX driver is going to be > useless for a lot of hardware that is out in the field. Linux has > always had the reputation for supporting legacy hardware so this > directly contravenes that principal and needlessly so. I do get your point about supporting the legacy. I'm wondering if this is still a deal breaker for Linux or not. /Jarkko