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    SubjectRe: [RFC PATCH 00/16] x86/split_lock: Enable #AC exception for split locked accesses
    On Thu, 21 Jun 2018, Fenghua Yu wrote:
    > The control knob for firmware is to choose continuing firmware execution
    > by disabling #AC split lock (default) or stopping firmware execution
    > by enabling #AC for split lock. Stopping firmware execution may be useful
    > in hard real time system to identify any split lock issue on the platform.

    There is no maybe on a real-time system. Either the thing is sane or it's
    not. There is no middle ground. The default has to be fail otherwise
    firmware wont be fixed ever.

    > So the control knobs may be useful for different scenarios, right?

    The control knobs are just helping to proliferate crap, so they are not
    useful, they are outright counterproductive.

    Thanks,

    tglx

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