Message-ID: <f13b3365d5ad7b61194ade7f1baa574964cd47e2.camel@linux.intel.com>
Subject: Re: [PATCH RESEND V2 4/6] platform/x86: Add Intel Software Defined
 Silicon driver
From:   "David E. Box" <david.e.box@linux.intel.com>
Reply-To: david.e.box@linux.intel.com
To:     Greg KH <gregkh@linuxfoundation.org>
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 <markgross@kernel.org>
Date:   Wed, 08 Dec 2021 09:49:36 -0800
In-Reply-To: <YbDcPipY/SbV3Gvs@kroah.com>
References: <20211208015015.891275-1-david.e.box@linux.intel.com>
         <20211208015015.891275-5-david.e.box@linux.intel.com>
         <YbDcPipY/SbV3Gvs@kroah.com>
Organization: David E. Box
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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.