[Xen-devel] Possible Regression in "MMCONFIG PCI config space access driver backported from Linux Kernel Ver. 2.6.31.5"

[Simon Horman <horms@xxxxxxxxxxxx>]

Hi,

the changest ""MMCONFIG PCI config space access driver
backported from Linux Kernel Ver. 2.6.31.5" (952:f1bad8203efc)
in the linux-2.6.18-xen.hg tree appears to introduce a regression.

The problem that I am seeing is that my (x86_64) HP dc7800 no longer boots,
hanging during PCI initialisation.

ACPI: bus type pci registered
PCI: MCFG configuration 0: base f4000000 segment 0 buses 0 - 63
PCI: MCFG area at f4000000 reserved in E820
PCI: Using MMCONFIG at f4000000 - f7ffffff
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
ACPI: Assume root bridge [\_SB_.PCI0] bus is 0

The full boot log and .config are attached.

boot.log
Description: Text document

config
Description: Text document

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