On Monday 21 December 2015, Okaya at codeaurora.org wrote:

Thanks, I won't be touching the acpi tables then and I will assume the
hack had a problem. It was trying to remap the io range of the second root
port  to the first port io address map.

If all domains share the same I/O space, you should only map it once
of course.

I was getting a warning from resource.c

Btw, when I tested the io ranges before, kernel didn't accept anything
below 1k like 0. That is why my range starts at 1k.

This is PCIBIOS_MIN_IO, it defines what I/O port numbers can be dynamically
assigned to PCI devices, but you should still map the entire 64K area per
domain, including the first 4K that can be used for legacy ISA compatibility.

	Arnd