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=DKIM_INVALID,DKIM_SIGNED, 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 642A5C43441 for ; Fri, 9 Nov 2018 07:13:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2894D20840 for ; Fri, 9 Nov 2018 07:13:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="W5/yu3nF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2894D20840 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-sgx-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728006AbeKIQwW (ORCPT ); Fri, 9 Nov 2018 11:52:22 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:40018 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727093AbeKIQwV (ORCPT ); Fri, 9 Nov 2018 11:52:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=IrgHHScUgWiQ+RbIbd2HbhtIi//KRrdsNGy7S15z2dc=; b=W5/yu3nFZikOEofUR/GtmZxIv cT/aY4DO+LS2Diy1ebZVnAxEI6Ftzofd2PsUW9Q4iOooZa36wtU4MW+ZH7mpxr6WSnEmCuIhY6yt0 SlTLazUYUTWffh5j+o0pFcebkwORwQurVTNNswO5/U/H/HYV8tj6pok1l5uKf1jRbXAxSpgkBB/zR yrpq5OPLBoZY4XaMWyXwSxtPqrQGhk6MiiR60kfbL/EZXu2jAaIJn/A1ALTAJjwsWVAtHD6MmBBAm +LpuZpNE+6XNdV4GhaI6IbMfnxdM865PFPHQZjb1ip2D6TB2wM/XpJdWktPVyEY3jaLxT50dJxhNs dqY/Go4JA==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1gL0yR-0004Qz-Mc; Fri, 09 Nov 2018 07:12:59 +0000 Date: Thu, 8 Nov 2018 23:12:59 -0800 From: Christoph Hellwig To: Andy Lutomirski Cc: "Christopherson, Sean J" , Dave Hansen , Andrew Lutomirski , Jann Horn , Linus Torvalds , Rich Felker , Dave Hansen , Jethro Beekman , Jarkko Sakkinen , Florian Weimer , Linux API , X86 ML , linux-arch , LKML , Peter Zijlstra , nhorman@redhat.com, npmccallum@redhat.com, "Ayoun, Serge" , shay.katz-zamir@intel.com, linux-sgx@vger.kernel.org, Andy Shevchenko , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Carlos O'Donell , adhemerval.zanella@linaro.org Subject: Re: RFC: userspace exception fixups Message-ID: <20181109071259.GA14784@infradead.org> References: <1541524750.7839.51.camel@intel.com> <22596E35-F5D1-4935-86AB-B510DCA0FABE@amacapital.net> <1C426267-492F-4AE7-8BE8-C7FE278531F9@amacapital.net> <209cf4a5-eda9-2495-539f-fed22252cf02@intel.com> <9B76E95B-5745-412E-8007-7FAA7F83D6FB@amacapital.net> <20181108195420.GA14715@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org Message-ID: <20181109071259.IcwU-noO6nniPwCrnZQEiugiuaFWWzCcdWoUJhuuuzQ@z> On Thu, Nov 08, 2018 at 12:05:42PM -0800, Andy Lutomirski wrote: > This whole thing is a mess. I'm starting to think that the cleanest > solution would be to provide a way to just tell the kernel that > certain RIP values have exception fixups. The bay far cleanest solution would be to say that SGX is sich a mess that we are not going to support it at all. It's not like it is a must have a feature to start with.