Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 28 Nov 2018 11:22:28 -0800
From:   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To:     "Dr. Greg" <greg@enjellic.com>
Cc:     Andy Lutomirski <luto@amacapital.net>,
        Andy Lutomirski <luto@kernel.org>, X86 ML <x86@kernel.org>,
        Platform Driver <platform-driver-x86@vger.kernel.org>,
        linux-sgx@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
        "Christopherson, Sean J" <sean.j.christopherson@intel.com>,
        nhorman@redhat.com, npmccallum@redhat.com,
        "Ayoun, Serge" <serge.ayoun@intel.com>, shay.katz-zamir@intel.com,
        haitao.huang@linux.intel.com,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Svahn, Kai" <kai.svahn@intel.com>, mark.shanahan@intel.com,
        Suresh Siddha <suresh.b.siddha@intel.com>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Darren Hart <dvhart@infradead.org>,
        Andy Shevchenko <andy@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v17 18/23] platform/x86: Intel SGX driver
Message-ID: <20181128192228.GC9023@linux.intel.com>
References: <CALCETrWJr-C6yK8NBCp=NbapwHOaBFphiDU9VKEtQ0NMRrdC2g@mail.gmail.com>
 <20181124172114.GB32210@linux.intel.com>
 <20181125145329.GA5777@linux.intel.com>
 <0669C300-02CB-4EA6-BF88-5C4B4DDAD4C7@amacapital.net>
 <20181126215145.GC868@linux.intel.com>
 <20181126230436.GA6737@linux.intel.com>
 <20181127085533.GA12247@wind.enjellic.com>
 <20181127164129.GB4170@linux.intel.com>
 <C11C9312-65BC-460A-8F9F-608E101AE5C1@amacapital.net>
 <20181128104941.GA23077@wind.enjellic.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20181128104941.GA23077@wind.enjellic.com>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
User-Agent: Mutt/1.10.1 (2018-07-13)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, Nov 28, 2018 at 04:49:41AM -0600, Dr. Greg wrote:
> We've been carrying a patch, that drops in on top of the proposed
> kernel driver, that implements the needed policy management framework
> for DAC fragile (FLC) platforms.  After a meeting yesterday with the
> client that is funding the work, a decision was made to release the
> enhancements when the SGX driver goes mainline.  That will at least
> give developers the option of creating solutions on Linux that
> implement the security guarantees that SGX was designed to deliver.

We do not need yet another policy management framework to the *kernel*.

The token based approach that Andy is proposing is proven and well
established method to create a mechanism. You can then create a daemon
to user space that decides who it wants to send tokes.

/Jarkko