[Devel] GPE blocks in reduced hardware mode

[Al Stone <ahs3 at redhat.com>]

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Howdy.

I've been trying to do some clean-up on the Linux ACPI driver with
regard to the reduced hardware profile introduced in ACPI 5.0.

In thinking about GPE block devices, I was looking through the
functions in source/components/events/evxfgpe.c and noticed that
they are all #ifdef'd out for ACPI_REDUCED_HARDWARE.  When I look
back through the specification, however, I cannot find any place
where they are prohibited.

Clearly, the gpe0/1 blocks in the FADT are not to be used; this
is explicitly stated in section 5.2.9 of the spec.  Could someone
please point me to a similar statement for a GPE block device?  I
just cannot seem to find it.

The closest thing I can find is section 9.10 implying that a GPE
block device is an extension of the gpe0/1 blocks from the FADT,
but there is no explicit statement there so it is ambiguous to me.

Thanks in advance for any pointers; I'm just puzzled at this point
and trying to understand how the conclusion came to be.

-- 
ciao,
al
-----------------------------------
Al Stone
Software Engineer
Red Hat, Inc.
ahs3(a)redhat.com
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