Based on the fact that the 1st MADT on this box is toast, they're not using that.
If the last one also doesn't work universally, then they must be using the namespace.
For us to do the same would be a relatively significant change -- as it means
we either have to push SMP startup after the interpreter init, or move the
interpreter init yet sooner.
In general, over the last couple of years, we've been forced for compatibility
with various systems to move ACPI initialization sooner and sooner.
(I think the last issue was getting the HW into "ACPI mode" sooner
because some stuff I don't recall didn't work if we didn't)
It would probably make sense to experiment with what the soonest we
can initialize ACPI, as I have a feeling we're going to have to head that way.
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