Re: [Qemu-devel] Re: [PATCH 1/6] Make config space accessor host bus trapable

[Benjamin Herrenschmidt]

> Yes, but I think how you program your host to pci bridge is platform specific,
> the standard (mostly) applies to what happens below the bridge.  There's
> no real standard for how PCI host bridge is connected to processor
> AFAIK, it's by luck we can share code there at all.

Well, yes and no ... there's a standard on how a PCI host bridge is
connected in the sense that how normal MMIO accesses go through in term
of endianness is well defined.

How you actually issue config space cycles is a property of a given
bridge. How you issue IO cycles as well in fact.

Cheers,
Ben.