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Subject: Re: [PATCH v20 00/28] Intel SGX1 support
To:     "Dr. Greg" <greg@enjellic.com>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
        x86@kernel.org, linux-sgx@vger.kernel.org,
        akpm@linux-foundation.org, sean.j.christopherson@intel.com,
        nhorman@redhat.com, npmccallum@redhat.com, serge.ayoun@intel.com,
        shay.katz-zamir@intel.com, haitao.huang@intel.com,
        andriy.shevchenko@linux.intel.com, tglx@linutronix.de,
        kai.svahn@intel.com, bp@alien8.de, josh@joshtriplett.org,
        luto@kernel.org, kai.huang@intel.com, rientjes@google.com
References: <20190417103938.7762-1-jarkko.sakkinen@linux.intel.com>
 <20190418171059.GA20819@wind.enjellic.com>
 <d79261c0-f2ae-0ed8-96b6-fb4d1677e3dc@intel.com>
 <20190419162450.GA2615@wind.enjellic.com>
From:   Dave Hansen <dave.hansen@intel.com>
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Message-ID: <088e39dc-025a-1dea-4f26-239d5c059d6a@intel.com>
Date:   Fri, 19 Apr 2019 09:39:03 -0700
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On 4/19/19 9:24 AM, Dr. Greg wrote:
>> Companies ideally shouldn't be getting their customers hooked on
>> out-of-tree ABIs and customers should consume out-of-tree ABIs
>> *expecting* them to break in the future.
> At the risk of being indelicate, it was your company that hooked the
> SGX development community on out-of-tree driver ABI's and software.

I would encourage anyone who has been impacted by this to communicate
that back to the folks at Intel from whom they received the out-of-tree
code about the impact.

> Is there going to be an OEM mandated requirement, enforced by Intel
> licensing, that all SGX capable platforms will implement Flexible
> Launch Control?
Heck if I know.  I don't think LKML is a great place to discuss Intel
licensing requirements.

What I *do* know is that when builds a platform without Flexible Launch
Control, Linux does not support SGX on that platform.  I guess that
could be spelled out in some documentation explicitly, if it isn't already.