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SubjectMCFG ACPI patch in git-x86 causes boot regression

This patch

commit c5182babd1d0706f1294af7b8dbf64e378b066bb
Author: Robert Hancock <>
Date: Sat Jan 5 13:26:32 2008 +0100

x86: validate against ACPI motherboard resources


recently added to git-x86 causes one of my Intel test systems to not boot
unless I specify pci=conf1.

ACPI: EC: Look up EC in DSDT
ACPI: Interpreter enabled
ACPI: (supports S0 S3 S4 S5)
ACPI: Using IOAPIC for interrupt routing
PCI: MCFG configuration 0: base 4026531840 segment 0 buses 0 - 127
PCI: MCFG area at f0000000 reserved in ACPI motherboard resources
PCI: Using MMCONFIG at f0000000 - f7ffffff
ACPI: PCI Root Bridge [PCI0] (0000:00)

The system is a SDV, but I believe production level.
DSDT is available at

On previous kernels the MCFG was rejected because it wasn't e820 reserved:

ACPI: bus type pci registered
PCI: BIOS Bug: MCFG area at f0000000 is not E820-reserved
PCI: Not using MMCONFIG.
PCI: Using configuration type 1

Also I'm a little surprised to find my Signed-off-by on that patch.


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