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    SubjectRe: [PATCH RFC] x86/acpi: don't ignore I/O APICs just because there's no local APIC
    On 06/18/09 09:08, Len Brown wrote:
    >> In principle, the local APIC and the I/O APIC are distinct (but related)
    >> components, which can be independently present.
    > bzzzzt, but thanks for playing:-)

    Perhaps I should have expressed that a bit more clearly: you could, if
    mad, build a machine with I/O APICs and some other mechanism for
    delivering the interrupts to CPUs. In practice, I doubt anyone ever
    has, or ever would.

    The only actual exception I know of is Xen's replacement of the physical
    local APIC with a paravirtualized interrupt interface.


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