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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3EF4CC433F5 for ; Wed, 8 Dec 2021 17:55:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238407AbhLHR7W (ORCPT ); Wed, 8 Dec 2021 12:59:22 -0500 Received: from mga18.intel.com ([134.134.136.126]:12332 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238383AbhLHR7U (ORCPT ); Wed, 8 Dec 2021 12:59:20 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10192"; a="224760916" X-IronPort-AV: E=Sophos;i="5.88,190,1635231600"; d="scan'208";a="224760916" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2021 09:49:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,190,1635231600"; d="scan'208";a="516315114" Received: from linux.intel.com ([10.54.29.200]) by fmsmga007.fm.intel.com with ESMTP; 08 Dec 2021 09:49:36 -0800 Received: from debox1-desk1.jf.intel.com (debox1-desk1.jf.intel.com [10.54.75.53]) by linux.intel.com (Postfix) with ESMTP id 43C68580D37; Wed, 8 Dec 2021 09:49:36 -0800 (PST) Message-ID: Subject: Re: [PATCH RESEND V2 4/6] platform/x86: Add Intel Software Defined Silicon driver From: "David E. Box" Reply-To: david.e.box@linux.intel.com To: Greg KH Cc: lee.jones@linaro.org, hdegoede@redhat.com, bhelgaas@google.com, andriy.shevchenko@linux.intel.com, srinivas.pandruvada@intel.com, mgross@linux.intel.com, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-pci@vger.kernel.org, Mark Gross Date: Wed, 08 Dec 2021 09:49:36 -0800 In-Reply-To: References: <20211208015015.891275-1-david.e.box@linux.intel.com> <20211208015015.891275-5-david.e.box@linux.intel.com> Organization: David E. Box Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.38.4 (3.38.4-1.fc33) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2021-12-08 at 17:24 +0100, Greg KH wrote: > On Tue, Dec 07, 2021 at 05:50:13PM -0800, David E. Box wrote: > > Intel Software Defined Silicon (SDSi) is a post manufacturing mechanism for > > activating additional silicon features. Features are enabled through a > > license activation process.  The SDSi driver provides a per socket, sysfs > > attribute interface for applications to perform 3 main provisioning > > functions: > > > > 1. Provision an Authentication Key Certificate (AKC), a key written to > >    internal NVRAM that is used to authenticate a capability specific > >    activation payload. > > > > 2. Provision a Capability Activation Payload (CAP), a token authenticated > >    using the AKC and applied to the CPU configuration to activate a new > >    feature. > > > > 3. Read the SDSi State Certificate, containing the CPU configuration > >    state. > > > > The operations perform function specific mailbox commands that forward the > > requests to SDSi hardware to perform authentication of the payloads and > > enable the silicon configuration (to be made available after power > > cycling). > > > > The SDSi device itself is enumerated as an auxiliary device from the > > intel_vsec driver and as such has a build dependency on CONFIG_INTEL_VSEC. > > > > Link: https://github.com/intel/intel-sdsi > > There is no code at this link :( > Not yet. It's currently just documentation. But sample code was added to this patch series.