On Sat, 30 Aug 2008, Yinghai Lu wrote:

quoted text
>

> do you agree to use quirk to make the BAR res to have correct end

> between pci_probe and pci_resource_survey?

In general I would agree, but now that I've looked at it a bit more, I

actually don't think it's a bug in the chipset any more. See my previous

email that crossed with yours.
I suspect that that northbridge resource is basically acting as a bridge

resource. So 0xe0000000 - 0xffffffff is actually _correct_. And MCFG being

in that window (and being first in it) is just a detail.
Look at the resource allocations on Rafael's machine: there are two

different classes:
 - outside that BAR3 window:
   The "external gfx0 port A" decode (bridged by device 0000:02.0):
	d8000000-dfffffff : PCI Bus 0000:01

	  d8000000-dfffffff : 0000:01:00.0

	    d8000000-d8ffffff : vesafb
   and suspect the graphics port is special (considering that this is an

   ATI chipset)
 - inside that BAR3 window: everything else (PCI express):
	e0000000-efffffff : PCI MMCONFIG 0

	fe6f4000-fe6f7fff : 0000:00:14.2

	  fe6f4000-fe6f7fff : ICH HD audio

	fe6fa000-fe6fafff : 0000:00:13.4

	  fe6fa000-fe6fafff : ohci_hcd

	fe6fb000-fe6fbfff : 0000:00:13.3

	  fe6fb000-fe6fbfff : ohci_hcd

	fe6fc000-fe6fcfff : 0000:00:13.2

	  fe6fc000-fe6fcfff : ohci_hcd

	fe6fd000-fe6fdfff : 0000:00:13.1

	  fe6fd000-fe6fdfff : ohci_hcd

	fe6fe000-fe6fefff : 0000:00:13.0

	  fe6fe000-fe6fefff : ohci_hcd

	fe6ff000-fe6ff0ff : 0000:00:13.5

	  fe6ff000-fe6ff0ff : ehci_hcd

	fe6ff800-fe6ffbff : 0000:00:12.0

	  fe6ff800-fe6ffbff : ahci

	fe700000-fe7fffff : PCI Bus 0000:01

	  fe7c0000-fe7dffff : 0000:01:00.0

	  fe7e0000-fe7effff : 0000:01:00.1

	  fe7f0000-fe7fffff : 0000:01:00.0

	fe800000-fe8fffff : PCI Bus 0000:02

	  fe8ffc00-fe8fffff : 0000:02:00.0

	    fe8ffc00-fe8fffff : ahci

	fe900000-fe9fffff : PCI Bus 0000:03

	  fe9c0000-fe9dffff : 0000:03:00.0

	  fe9fc000-fe9fffff : 0000:03:00.0

	    fe9fc000-fe9fffff : sky2

	fea00000-feafffff : PCI Bus 0000:04

	  feaffc00-feafffff : 0000:04:00.0

	    feaffc00-feafffff : ahci

	feb00000-febfffff : PCI Bus 0000:05

	  febff000-febfffff : 0000:05:08.0

	    febff000-febff7ff : ohci1394

	fec00000-fec00fff : IOAPIC 0

	fed00000-fed003ff : HPET 2

	fee00000-fee00fff : Local APIC

	fff00000-ffffffff : reserved
Hmm? 
(yeah, some of those resources are _really_ special, and are inside the

CPU itself, eg the APIC and possibly HPET, and never necessarily even make

it to the host bridge at all because they get decoded early).
			Linus

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