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    SubjectRe: [Xen-devel] [PATCH 10/24] xen: mask XSAVE from cpuid
    > well the choice fundamentally is
    > 1) Have correct applications work, even though you might not always get
    > all new features that the hardware could have done.. at the expense
    > that someone who wants to do horrible things can
    > 2) Have all latest features always there, but break correctly written
    > apps/oses every 2 years.

    I'm not sure there will be that much breakage. It seems more like
    a theoretical danger.

    >
    > I'd go for option 1 any day of the week, hands down.
    > Esp if the "cpu cloaking" kind of things really disable the
    > instructions... but even without.

    With cpu cloaking and disabling unknown instructions it would be fine
    to go conservative. But that's not what is being proposed.

    -Andi

    --
    ak@linux.intel.com -- Speaking for myself only.


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