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    SubjectRe: [PATCH] Use correct x86 reboot vector
    Richard B. Johnson wrote:
    >
    > Don't thing there's anything much easier than:
    >
    > movl $1, %eax
    > movl %eax, %cr0
    >
    > ... execute that in paged RAM (above the 1:1 mapping), and you
    > will get a hard processor reset without any bus access at all.
    > This unmaps everything in one fell-swoop.
    >

    You go back to 1:1 mappings at that point, so you *will* have bus accesses.

    -hpa

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