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authorBjorn Helgaas <bjorn.helgaas@hp.com>2010-02-23 10:24:41 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-02-23 09:43:42 -0800
commit7bc5e3f2be32ae6fb0c74cd0f707f986b3a01a26 (patch)
tree25db7dccd13f5826a91389c25810425ce36ba2d4 /arch/x86/include/asm/pci_x86.h
parent2fe2abf896c1e7a0ee65faaf3ef0ce654848abbd (diff)
x86/PCI: use host bridge _CRS info by default on 2008 and newer machines
The main benefit of using ACPI host bridge window information is that we can do better resource allocation in systems with multiple host bridges, e.g., http://bugzilla.kernel.org/show_bug.cgi?id=14183 Sometimes we need _CRS information even if we only have one host bridge, e.g., https://bugs.launchpad.net/ubuntu/+source/linux/+bug/341681 Most of these systems are relatively new, so this patch turns on "pci=use_crs" only on machines with a BIOS date of 2008 or newer. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'arch/x86/include/asm/pci_x86.h')
-rw-r--r--arch/x86/include/asm/pci_x86.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index b4bf9a942ed..05b58ccb2e8 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -29,6 +29,7 @@
#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000
#define PCI_HAS_IO_ECS 0x40000
#define PCI_NOASSIGN_ROMS 0x80000
+#define PCI_ROOT_NO_CRS 0x100000
extern unsigned int pci_probe;
extern unsigned long pirq_table_addr;