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| author | Nathan Lynch <ntl@pobox.com> | 2008-07-27 15:24:54 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-28 16:30:52 +1000 |
| commit | e9efed3b80a83e44b98fc626f3268ae072550b84 (patch) | |
| tree | cbe7cc897dc112e2eb93f9bbded5aa3a8e6e0bf3 /include/asm-powerpc | |
| parent | 440a0857e32a05979fb01fc59ea454a723e80e4b (diff) | |
| download | linux-stable-e9efed3b80a83e44b98fc626f3268ae072550b84.tar.gz linux-stable-e9efed3b80a83e44b98fc626f3268ae072550b84.tar.bz2 linux-stable-e9efed3b80a83e44b98fc626f3268ae072550b84.zip | |
powerpc: Make core id information available to userspace
Existing Open Firmware practice is to report each processor core as a
separate node in the device tree. Report the value of the "reg" OF
property corresponding to a logical CPU's device node as the core_id
attribute in /sys/devices/system/cpu/cpu*/topology/core_id.
Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/smp.h | 1 | ||||
| -rw-r--r-- | include/asm-powerpc/topology.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h index 32e910006250..4d28e1e4521b 100644 --- a/include/asm-powerpc/smp.h +++ b/include/asm-powerpc/smp.h @@ -63,6 +63,7 @@ extern int smp_hw_index[]; DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); DECLARE_PER_CPU(cpumask_t, cpu_core_map); +extern int cpu_to_core_id(int cpu); /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. * diff --git a/include/asm-powerpc/topology.h b/include/asm-powerpc/topology.h index f00e8e551738..c32da6f97999 100644 --- a/include/asm-powerpc/topology.h +++ b/include/asm-powerpc/topology.h @@ -109,6 +109,7 @@ static inline void sysfs_remove_device_from_node(struct sys_device *dev, #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) +#define topology_core_id(cpu) (cpu_to_core_id(cpu)) #endif #endif |