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authorChristoph Lameter <christoph@lameter.com>2005-06-23 00:08:18 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 09:45:08 -0700
commit8c5a09082f4e61a176382e96a831a0636b918602 (patch)
tree89a7086ebbec9d94dc7b7b3483d3750220ba979c
parente164f5573bef0e6caf53519719cf0228c9c15ce3 (diff)
[PATCH] x86/x86_64: pcibus_to_node
Define pcibus_to_node to be able to figure out which NUMA node contains a given PCI device. This defines pcibus_to_node(bus) in include/linux/topology.h and adjusts the macros for i386 and x86_64 that already provided a way to determine the cpumask of a pci device. x86_64 was changed to not build an array of cpumasks anymore. Instead an array of nodes is build which can be used to generate the cpumask via node_to_cpumask. Signed-off-by: Christoph Lameter <christoph@lameter.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/x86_64/kernel/mpparse.c4
-rw-r--r--arch/x86_64/pci/k8-bus.c16
-rw-r--r--include/asm-generic/topology.h9
-rw-r--r--include/asm-i386/topology.h8
-rw-r--r--include/asm-x86_64/topology.h14
5 files changed, 17 insertions, 34 deletions
diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c
index 61a63be6b29..ed6a5588146 100644
--- a/arch/x86_64/kernel/mpparse.c
+++ b/arch/x86_64/kernel/mpparse.c
@@ -23,6 +23,7 @@
#include <linux/kernel_stat.h>
#include <linux/mc146818rtc.h>
#include <linux/acpi.h>
+#include <linux/module.h>
#include <asm/smp.h>
#include <asm/mtrr.h>
@@ -45,7 +46,8 @@ int acpi_found_madt;
int apic_version [MAX_APICS];
unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
-cpumask_t pci_bus_to_cpumask [256] = { [0 ... 255] = CPU_MASK_ALL };
+unsigned char pci_bus_to_node [256];
+EXPORT_SYMBOL(pci_bus_to_node);
static int mp_current_pci_id = 0;
/* I/O APIC entries */
diff --git a/arch/x86_64/pci/k8-bus.c b/arch/x86_64/pci/k8-bus.c
index 62349c78db5..7e7d0c2a002 100644
--- a/arch/x86_64/pci/k8-bus.c
+++ b/arch/x86_64/pci/k8-bus.c
@@ -53,25 +53,11 @@ fill_mp_bus_to_cpumask(void)
for (j = SECONDARY_LDT_BUS_NUMBER(ldtbus);
j <= SUBORDINATE_LDT_BUS_NUMBER(ldtbus);
j++)
- pci_bus_to_cpumask[j] =
- node_to_cpumask(NODE_ID(nid));
+ pci_bus_to_node[j] = NODE_ID(nid);
}
}
}
- /* quick sanity check */
- printed = 0;
- for (i = 0; i < 256; i++) {
- if (cpus_empty(pci_bus_to_cpumask[i])) {
- pci_bus_to_cpumask[i] = CPU_MASK_ALL;
- if (printed)
- continue;
- printk(KERN_ERR
- "k8-bus.c: some busses have empty cpu mask\n");
- printed = 1;
- }
- }
-
return 0;
}
diff --git a/include/asm-generic/topology.h b/include/asm-generic/topology.h
index ec96e8b0f19..5d9d70cd17f 100644
--- a/include/asm-generic/topology.h
+++ b/include/asm-generic/topology.h
@@ -41,8 +41,15 @@
#ifndef node_to_first_cpu
#define node_to_first_cpu(node) (0)
#endif
+#ifndef pcibus_to_node
+#define pcibus_to_node(node) (-1)
+#endif
+
#ifndef pcibus_to_cpumask
-#define pcibus_to_cpumask(bus) (cpu_online_map)
+#define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ? \
+ CPU_MASK_ALL : \
+ node_to_cpumask(pcibus_to_node(bus)) \
+ )
#endif
#endif /* _ASM_GENERIC_TOPOLOGY_H */
diff --git a/include/asm-i386/topology.h b/include/asm-i386/topology.h
index 98f9e6850cb..6d0f67507b2 100644
--- a/include/asm-i386/topology.h
+++ b/include/asm-i386/topology.h
@@ -60,12 +60,8 @@ static inline int node_to_first_cpu(int node)
return first_cpu(mask);
}
-/* Returns the number of the node containing PCI bus number 'busnr' */
-static inline cpumask_t __pcibus_to_cpumask(int busnr)
-{
- return node_to_cpumask(mp_bus_id_to_node[busnr]);
-}
-#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus->number)
+#define pcibus_to_node(bus) mp_bus_id_to_node[(bus)->number]
+#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus))
/* sched_domains SD_NODE_INIT for NUMAQ machines */
#define SD_NODE_INIT (struct sched_domain) { \
diff --git a/include/asm-x86_64/topology.h b/include/asm-x86_64/topology.h
index da21573ec73..8f77e9f6bc2 100644
--- a/include/asm-x86_64/topology.h
+++ b/include/asm-x86_64/topology.h
@@ -13,8 +13,8 @@
extern cpumask_t cpu_online_map;
extern unsigned char cpu_to_node[];
+extern unsigned char pci_bus_to_node[];
extern cpumask_t node_to_cpumask[];
-extern cpumask_t pci_bus_to_cpumask[];
#ifdef CONFIG_ACPI_NUMA
extern int __node_distance(int, int);
@@ -26,16 +26,8 @@ extern int __node_distance(int, int);
#define parent_node(node) (node)
#define node_to_first_cpu(node) (__ffs(node_to_cpumask[node]))
#define node_to_cpumask(node) (node_to_cpumask[node])
-
-static inline cpumask_t __pcibus_to_cpumask(int bus)
-{
- cpumask_t busmask = pci_bus_to_cpumask[bus];
- cpumask_t online = cpu_online_map;
- cpumask_t res;
- cpus_and(res, busmask, online);
- return res;
-}
-#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus->number)
+#define pcibus_to_node(bus) pci_bus_to_node[(bus)->number]
+#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus));
/* sched_domains SD_NODE_INIT for x86_64 machines */
#define SD_NODE_INIT (struct sched_domain) { \