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    SubjectRe: [PATCH] x86-64: espfix for 64-bit mode *PROTOTYPE*
    On Mon, Apr 21, 2014 at 06:53:36PM -0700, Andrew Lutomirski wrote:
    > On Mon, Apr 21, 2014 at 6:47 PM, H. Peter Anvin <hpa@zytor.com> wrote:
    > > Race condition (although with x86 being globally ordered, it probably can't actually happen.) The bitmask is probably the way to go.
    >
    > Does the race matter? In the worst case you take the lock
    > unnecessarily. But yes, the bitmask is easy.

    I wonder if it would be workable to use a bit in the espfix PGD to
    denote that it has been initialized already... I hear, near NX there's
    some room :-)

    --
    Regards/Gruss,
    Boris.

    Sent from a fat crate under my desk. Formatting is fine.
    --


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