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    SubjectRe: 2.6.14: CR4 not needed to be inspected on the 486 anymore?
    linux-os (Dick Johnson) wrote:
    >>No, you won't. #UD and #GP will not (I hesitate to say never, but other
    >>than a processor bug, I believe that is correct) reset the processor.
    >>And CR4 is not "undocumented", even on 486.
    > Yes it is. The i486 Programmer's reference manual documents only
    > to CR3.

    The manual might be older than the newer 486 CPUs.
    And don't forget that not every 486 is Intel. There are at least Cyrix,
    AMD and UMC with interesting Am5x86-P75 and Cx5x86 too.

    Ondrej Zary
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