linux-kernel - Re: [PATCH v29 00/20] Intel SGX foundations

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Date:   Sat, 16 May 2020 12:58:20 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Nathaniel McCallum <npmccallum@...hat.com>,
        "Dr. Greg" <greg@...ellic.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        x86@...nel.org, linux-sgx@...r.kernel.org,
        akpm@...ux-foundation.org, dave.hansen@...el.com,
        Neil Horman <nhorman@...hat.com>,
        "Huang, Haitao" <haitao.huang@...el.com>,
        andriy.shevchenko@...ux.intel.com,
        "Svahn, Kai" <kai.svahn@...el.com>, bp@...en8.de,
        Josh Triplett <josh@...htriplett.org>, luto@...nel.org,
        kai.huang@...el.com, David Rientjes <rientjes@...gle.com>,
        "Xing, Cedric" <cedric.xing@...el.com>,
        Patrick Uiterwijk <puiterwijk@...hat.com>
Subject: Re: [PATCH v29 00/20] Intel SGX foundations

On Fri, 2020-05-15 at 15:54 -0400, Nathaniel McCallum wrote:
> The (Red Hat sponsored) Enarx project will continue building an
> unofficial, unsupported version of the Fedora kernel with the SGX
> patches[0] until such time as the patches are upstream. Once upstream,
> I intend to propose that the feature be enabled in the stock Fedora
> kernel.
> 
> Enarx requires EDMM support as a prerequisite to being production
> ready. Therefore, we are likely to continue building this custom
> Fedora kernel with the latest patches until such point as EDMM support
> lands upstream. This also implies that I have no current plan to
> request an SGX backport to a RHEL kernel until such time as it
> supports our full needs.
> 
> Disclaimer: I do not control RHEL or Fedora kernel features. None of
> the above constitutes a commitment to deliver anything.
> 
> [0]: https://copr.fedorainfracloud.org/coprs/npmccallum/enarx/package/kernel/

SGX is somewhat self-contained feature, i.e. should be easy to backport
for any recent kernel. Only the vDSO is outside of arch/x86/kernel/cpu/sgx.

/Jarkko