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    SubjectRe: [PATCH v5 11/11] intel_sgx: driver documentation
    On Tue, Nov 14, 2017 at 10:53:27PM +0100, Borislav Petkov wrote:
    > On Tue, Nov 14, 2017 at 10:49:48PM +0200, Jarkko Sakkinen wrote:
    > > Pre-boot firmware could potentially configure the root key hash for the
    > > enclave that signs launch tokens for other enclaves i.e. the launch
    > > enclave that is built and signed during the kbuild.
    >
    > So how about firmware doesn't do anything and the machine owner decide
    > what enclaves get launched and what key hashes to load for a change?
    > I.e., let the owner really own the hardware she paid money for.
    >
    > Or are we doing encrypted enclaves but then the firmware vendor can look
    > inside too?
    >
    > --
    > Regards/Gruss,
    > Boris.

    Firmware cannot access the memory inside an enclave. CPU asserts every
    memory access coming outside the enclave.

    /Jarkko

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