On Tue, Dec 13, 2016 at 04:09:39AM -0500, Jon Masters wrote: > On 11/29/2016 04:39 PM, Bjorn Helgaas wrote: > > > +New architectures should be able to use "Consumer" Extended Address Space > > +descriptors in the PNP0A03 device for bridge registers, including ECAM, > > +although a strict interpretation of [6] might prohibit this. Old x86 and > > +ia64 kernels assume all address space descriptors, including "Consumer" > > +Extended Address Space ones, are windows, so it would not be safe to > > +describe bridge registers this way on those architectures. > > <snip> > > > +[6] PCI Firmware 3.0, sec 4.1.2: > > <snip> > > Thanks for the revised writeup, Bjorn. It's great. I'm trying to get the > above clarified explicitly in terms of the spec, and in terms of what > other Operating Systems would like to see as general preference. Any feedback on this? I'd like to post a revised version soon for v4.11. Bjorn
