Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just because there's no local APIC

[Eric W. Biederman]

Jeremy Fitzhardinge <jeremy@xxxxxxxx> writes:

> Parse the ACPI MADT for I/O APIC information, even if the cpu has no
> (apparent) local APIC (ie, the CPU's APIC feature flag is clear).
>
> In principle, the local APIC and the I/O APIC are distinct (but related)
> components, which can be independently present.
>
> In practice this can happen in a Xen system, where the hypervisor has
> full control over the local APICs, and delivers interrupts initiated by
> the I/O APICs via Xen's event channel mechanism.

Xen  is giving us a semi bogus acpi table?

What is the paravirt configuration model with Xen?  Is it documented
somewhere?

Eric
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