| commit | 7bc5e3f2be32ae6fb0c74cd0f707f986b3a01a26 | |
| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | |
| Tue, 23 Feb 2010 17:24:41 +0000 (23 10:24 -0700) | ||
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | |
| Tue, 23 Feb 2010 17:43:42 +0000 (23 09:43 -0800) | ||
| tree | 25db7dccd13f5826a91389c25810425ce36ba2d4 | treesnapshot (tar.gz zip) |
| parent | 2fe2abf896c1e7a0ee65faaf3ef0ce654848abbd | commitdiff |
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>
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>