Re: PowerNV PCI & SR-IOV cleanups

On Fri, Jul 10, 2020 at 03:23:25PM +1000, Oliver O'Halloran wrote:

This is largely prep work for supporting VFs in the 32bit MMIO window.
This is an unfortunate necessity due to how the Linux BAR allocator
handles BARs marked as non-prefetchable. The distinction
between prefetch and non-prefetchable BARs was made largely irrelevant
with the introduction of PCIe, but the BAR allocator is overly
conservative. It will always place non-pref bars in the prefetchable
window, which is 32bit only. This results in us being unable to use VFs
from NVMe drives and a few different RAID cards.

How about fixing that in the core PCI code?

(nothing against this series through, as it seems like a massive
cleanup)