SGX feature extensions patch.

[Dr. Greg]

Good morning, I hope the week is starting well for everyone.

With the SGX driver having been mainlined in the 5.11 release we will
be maintaining and releasing our out-of-tree SGX feature extension
patch for each kernel release.

The patches will be available using the following URL format:

ftp://ftp.enjellic.com/pub/sgx/kernel/SFLC-MAJOR.MINOR.patch

With the detached signature available via the following URL:

ftp://ftp.enjellic.com/pub/sgx/kernel/SFLC-MAJOR.MINOR.patch.asc

The 5.11 patch and signature can thus be retrieved via the following
URL's:

ftp://ftp.enjellic.com/pub/sgx/kernel/SFLC-5.11.patch

ftp://ftp.enjellic.com/pub/sgx/kernel/SFLC-5.11.patch.asc

I've included the public signing key that is being used for the
signatures at the end of this e-mail.

In addition to implementing cryptographic access control policies, the
feature extension patch allows the mainline driver to work on
platforms that do not have Flexible Launch Control.

The changelog for the patch contains documentation for how to use the
cryptographic access control policies, along with the rationale for
enabling support for non-FLC platforms, which is basically the fact
that with the mainline Linux driver there is very little hardware
available to developers who would be interested in working with SGX on
Linux.

The driver extensions are unit tested on both FLC and non-FLC
hardware.

We would, of course, be interested in any productive suggestions,
security issues or enhancement requests.  Depending on the trajectory
of mainline development, we may add support for partial page
initialization if that doesn't look like it is headed for mainline
inclusion.

Best wishes for a productive week.

Dr. Greg

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As always,
Dr. Greg Wettstein, Ph.D, Worker      Autonomously self-defensive
Enjellic Systems Development, LLC     IOT platforms and edge devices.
4206 N. 19th Ave.
Fargo, ND  58102
PH: 701-281-1686                      EMAIL: greg@xxxxxxxxxxxx
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"Heaven goes by favor.  If it went by merit, you would stay out and your
 dog would go in."
                                -- Mark Twain