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=-2.2 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 5028FC4360C for ; Wed, 16 Oct 2019 10:17:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2519720872 for ; Wed, 16 Oct 2019 10:17:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727442AbfJPKR0 (ORCPT ); Wed, 16 Oct 2019 06:17:26 -0400 Received: from mga07.intel.com ([134.134.136.100]:50735 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727167AbfJPKR0 (ORCPT ); Wed, 16 Oct 2019 06:17:26 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Oct 2019 03:17:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,303,1566889200"; d="scan'208";a="186107024" Received: from jsakkine-mobl1.tm.intel.com (HELO localhost) ([10.237.50.130]) by orsmga007.jf.intel.com with ESMTP; 16 Oct 2019 03:17:24 -0700 Date: Wed, 16 Oct 2019 13:17:23 +0300 From: Jarkko Sakkinen To: Sean Christopherson , Jethro Beekman Cc: linux-sgx@vger.kernel.org Subject: Re: [PATCH for_v23 3/7] x86/sgx: Tweak ADD_PAGE ioctl to allow adding multiple pages Message-ID: <20191016101723.GA8964@linux.intel.com> References: <20191009044241.3591-1-sean.j.christopherson@intel.com> <20191009044241.3591-4-sean.j.christopherson@intel.com> <20191014213255.GD26869@linux.intel.com> <20191014213546.GE26869@linux.intel.com> <20191014233127.GO22962@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191014233127.GO22962@linux.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org On Mon, Oct 14, 2019 at 04:31:28PM -0700, Sean Christopherson wrote: > I don't mind taking this to v23 review, but what do you mean by robustness > in this context? I think I kind of got this together API-wise: #define SGX_ENCLAVE_ADD_PAGES_MEASURE 1 struct sgx_enclave_add_pages { __u64 src; __u64 offset; __u64 length; __u64 secinfo; }; Length can be anything as long as low 8 bits are zero. The area defined by offset and length is measured when SGX_ENCLAVE_ADD_PAGES_MEASURE is set to 1. I think this is the most sane API so far and does fulfill Jethro's concerns why he originally wanted mrmask. I think this what most users would find the most intuitive API. Jethro, do you think you could live with this? /Jarkko