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19 Apr 2019 09:39:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,370,1549958400"; d="scan'208";a="224980089" Received: from ray.jf.intel.com (HELO [10.7.201.126]) ([10.7.201.126]) by orsmga001.jf.intel.com with ESMTP; 19 Apr 2019 09:39:03 -0700 Subject: Re: [PATCH v20 00/28] Intel SGX1 support To: "Dr. Greg" Cc: Jarkko Sakkinen , torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-sgx@vger.kernel.org, akpm@linux-foundation.org, sean.j.christopherson@intel.com, nhorman@redhat.com, npmccallum@redhat.com, serge.ayoun@intel.com, shay.katz-zamir@intel.com, haitao.huang@intel.com, andriy.shevchenko@linux.intel.com, tglx@linutronix.de, kai.svahn@intel.com, bp@alien8.de, josh@joshtriplett.org, luto@kernel.org, kai.huang@intel.com, rientjes@google.com References: <20190417103938.7762-1-jarkko.sakkinen@linux.intel.com> <20190418171059.GA20819@wind.enjellic.com> <20190419162450.GA2615@wind.enjellic.com> From: Dave Hansen Openpgp: preference=signencrypt Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190419162450.GA2615@wind.enjellic.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/19/19 9:24 AM, Dr. Greg wrote: >> Companies ideally shouldn't be getting their customers hooked on >> out-of-tree ABIs and customers should consume out-of-tree ABIs >> *expecting* them to break in the future. > At the risk of being indelicate, it was your company that hooked the > SGX development community on out-of-tree driver ABI's and software. I would encourage anyone who has been impacted by this to communicate that back to the folks at Intel from whom they received the out-of-tree code about the impact. > Is there going to be an OEM mandated requirement, enforced by Intel > licensing, that all SGX capable platforms will implement Flexible > Launch Control? Heck if I know. I don't think LKML is a great place to discuss Intel licensing requirements. What I *do* know is that when builds a platform without Flexible Launch Control, Linux does not support SGX on that platform. I guess that could be spelled out in some documentation explicitly, if it isn't already.