linux-kernel - Re: [PATCH 1/3] platform/x86: Add Intel Software Defined Silicon driver

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Date:   Tue, 01 Feb 2022 04:32:46 -0800
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     hdegoede@...hat.com, andriy.shevchenko@...ux.intel.com,
        srinivas.pandruvada@...el.com, mgross@...ux.intel.com,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        Mark Gross <markgross@...nel.org>
Subject: Re: [PATCH 1/3] platform/x86: Add Intel Software Defined Silicon
 driver

On Tue, 2022-02-01 at 09:45 +0100, Greg KH wrote:
> On Mon, Jan 31, 2022 at 07:04:22PM -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 <david.e.box@...ux.intel.com>
> > Reviewed-by: Mark Gross <markgross@...nel.org>
> > ---
> >  .../ABI/testing/sysfs-driver-intel_sdsi       |  77 +++
> >  MAINTAINERS                                   |   5 +
> >  drivers/platform/x86/intel/Kconfig            |  12 +
> >  drivers/platform/x86/intel/Makefile           |   2 +
> >  drivers/platform/x86/intel/sdsi.c             | 571 ++++++++++++++++++
> >  drivers/platform/x86/intel/vsec.c             |  12 +-
> >  6 files changed, 678 insertions(+), 1 deletion(-)
> >  create mode 100644 Documentation/ABI/testing/sysfs-driver-intel_sdsi
> >  create mode 100644 drivers/platform/x86/intel/sdsi.c
> > 
> > diff --git a/Documentation/ABI/testing/sysfs-driver-intel_sdsi
> > b/Documentation/ABI/testing/sysfs-driver-intel_sdsi
> > new file mode 100644
> > index 000000000000..126978647e9b
> > --- /dev/null
> > +++ b/Documentation/ABI/testing/sysfs-driver-intel_sdsi
> > @@ -0,0 +1,77 @@
> > +What:		/sys/bus/auxiliary/devices/intel_vsec.sdsi.X
> > +Date:		Dec 2021
> > +KernelVersion:	5.17
> 
> 5.17 merge window is long gone now.
> 
> Please be more careful.
> 

Thanks.