From 440a0857e32a05979fb01fc59ea454a723e80e4b Mon Sep 17 00:00:00 2001 From: Nathan Lynch Date: Sun, 27 Jul 2008 15:24:53 +1000 Subject: powerpc: Make core sibling information available to userspace Implement the notion of "core siblings" for powerpc. This makes /sys/devices/system/cpu/cpu*/topology/core_siblings present sensible values, indicating online CPUs which share an L2 cache. BenH: Made cpu_to_l2cache() use of_find_node_by_phandle() instead of IBM-specific open coded search Signed-off-by: Nathan Lynch Signed-off-by: Benjamin Herrenschmidt --- include/asm-powerpc/smp.h | 1 + include/asm-powerpc/topology.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/asm-powerpc') diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h index 416d4c288ce..32e91000625 100644 --- a/include/asm-powerpc/smp.h +++ b/include/asm-powerpc/smp.h @@ -62,6 +62,7 @@ extern int smp_hw_index[]; #endif DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); +DECLARE_PER_CPU(cpumask_t, cpu_core_map); /* 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 100c6fbfc58..f00e8e55173 100644 --- a/include/asm-powerpc/topology.h +++ b/include/asm-powerpc/topology.h @@ -108,6 +108,7 @@ static inline void sysfs_remove_device_from_node(struct sys_device *dev, #include #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) +#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) #endif #endif -- cgit v1.2.3