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authorBjorn Helgaas <bhelgaas@google.com>2014-01-24 22:54:36 +0400
committerBjorn Helgaas <bhelgaas@google.com>2014-02-03 21:38:35 +0400
commitafcf21c2beca6604dbdc24fed1624c2499a85e7d (patch)
treef6845bbb0b38f56dec7a2434800f9b0bad54e87a /arch/x86/include/asm/topology.h
parent49886cf4c4cd2ef77d0698c389199ad3e236f48e (diff)
downloadlinux-afcf21c2beca6604dbdc24fed1624c2499a85e7d.tar.xz
x86/PCI: Add x86_pci_root_bus_node() to look up NUMA node from PCI bus
The AMD early_fill_mp_bus_info() already allocates a struct pci_root_info for each PCI host bridge it finds, and that structure contains the NUMA node number. We don't need to keep the same information in the mp_bus_to_node[] table. This adds x86_pci_root_bus_node(), which returns the NUMA node number, or NUMA_NO_NODE if the node is unknown. Note that unlike get_mp_bus_to_node(), x86_pci_root_bus_node() only works for root buses. For example, if amd_bus.c finds a host bridge on node 1 to [bus 00-0f], get_mp_bus_to_node() returns 1 for any bus between 00 and 0f, but x86_pci_root_bus_node() returns 1 for bus 00 and NUMA_NO_NODE for buses 01-0f. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/x86/include/asm/topology.h')
-rw-r--r--arch/x86/include/asm/topology.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index d35f24e231cd..09046a1a6c35 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -131,6 +131,7 @@ static inline void arch_fix_phys_package_id(int num, u32 slot)
}
struct pci_bus;
+int x86_pci_root_bus_node(int bus);
void x86_pci_root_bus_resources(int bus, struct list_head *resources);
#ifdef CONFIG_SMP