On Tue, 23 Feb 2010 10:24:15 -0700 Bjorn Helgaas <bjorn.helgaas@xxxxxx> wrote: > Historically, Linux has assumed a single PCI host bridge, with that > bridge claiming all the address space left after RAM and legacy > devices are taken out. > > If the system contains multiple host bridges, we can no longer > operate under that assumption. We have to know what parts of the > address space are claimed by each bridge so that when we assign > resources to a PCI device, we take them from a range claimed by the > upstream host bridge. > > On x86 and ia64, we use ACPI to enumerate all the PCI host bridges in > the system, and part of the host bridge description is the > "_CRS" (current resource settings" property, which lists the address > space used by the bridge. On x86, we currently ignore most of the > _CRS information. This patch series changes this, so we will use > _CRS to learn about the host bridge windows. > > Since most x86 machines with multiple host bridges are relatively > new, this series only turns this on for machines with BIOS dates of > 2008 or newer. > > Changes from v4 to v5: > - Add EXPORT_SYMBOL_GPL(pci_bus_resource_n) for module builds. Thanks, it built this time. Pushed to my linux-next branch. -- Jesse Barnes, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
