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 BD05BC4332F for ; Wed, 8 Dec 2021 07:14:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240569AbhLHHS2 (ORCPT ); Wed, 8 Dec 2021 02:18:28 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:45330 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231535AbhLHHS0 (ORCPT ); Wed, 8 Dec 2021 02:18:26 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 5E8FBB81691; Wed, 8 Dec 2021 07:14:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 35BC0C00446; Wed, 8 Dec 2021 07:14:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638947692; bh=AWG3rNQnFaUqlVZi6qDgg8+9yS/8b11qWAJbuAsLQwg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QeYOTtDkErFpuDGtcd6GYC/LZ7toAO2LM14xQDUSZkNqC0l5jc3Mo45rFRPVJNpfx lzUW58lBRDO5xRk+BMW7lDfSzS2JUDkQM4XS7ACZgn2qHdPQadOsFi+COgHol21q+7 lIenJ0x6mvE4ApbPEw1+ZcM+vnHL2UXBr+d8h9m+xCYj+nF3489g0FGBpBSa3rwR2L HfSYSLQ0Wzj21PIqPiVZxekjDniB2mDYfXCGJrLFsXtS8cSlN4mjPCoOn6McXp6e7y oIKHTZf5UX7ENjgEP0wNgXcpZCXhDsdDBBXzK/nvzm1MAQluSDUaaxPhZPz52XyKUZ gmcV4fHYfrwSQ== Date: Wed, 8 Dec 2021 09:14:47 +0200 From: Leon Romanovsky To: "David E. Box" Cc: lee.jones@linaro.org, hdegoede@redhat.com, bhelgaas@google.com, gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, srinivas.pandruvada@intel.com, shuah@kernel.org, mgross@linux.intel.com, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-pci@vger.kernel.org Subject: Re: [V2 4/6] platform/x86: Add Intel Software Defined Silicon driver Message-ID: References: <20211207171448.799376-1-david.e.box@linux.intel.com> <20211207171448.799376-5-david.e.box@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211207171448.799376-5-david.e.box@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 07, 2021 at 09:14:46AM -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 > Signed-off-by: David E. Box > Reviewed-by: Mark Gross > --- > V2 > - Use sysfs_emit() in guid_show() > - Fix language in ABI, suggested by Bjorn > - Fix wrong directory name in ABI doc <...> > @@ -0,0 +1,77 @@ > +What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X <...> > +static const struct auxiliary_device_id sdsi_aux_id_table[] = { > + { .name = "intel_vsec.sdsi" }, Are you sure that this sysfs is correct? Auxiliary bus set device name as a combination of module name plus suffix. 172 int __auxiliary_device_add(struct auxiliary_device *auxdev, const char *modname) 173 { 174 struct device *dev = &auxdev->dev; 175 int ret; .... 181 182 ret = dev_set_name(dev, "%s.%s.%d", modname, auxdev->name, auxdev->id); Thanks