diff options
Diffstat (limited to 'include/asm-x86/topology.h')
| -rw-r--r-- | include/asm-x86/topology.h | 157 |
1 files changed, 96 insertions, 61 deletions
diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h index dcf3f8131d6..98e5f17ea85 100644 --- a/include/asm-x86/topology.h +++ b/include/asm-x86/topology.h @@ -35,79 +35,93 @@ # endif #endif +/* Node not present */ +#define NUMA_NO_NODE (-1) + #ifdef CONFIG_NUMA #include <linux/cpumask.h> #include <asm/mpspec.h> -/* Mappings between logical cpu number and node number */ #ifdef CONFIG_X86_32 -extern int cpu_to_node_map[]; -#else -/* Returns the number of the current Node. */ -#define numa_node_id() (early_cpu_to_node(raw_smp_processor_id())) -#endif - -DECLARE_PER_CPU(int, x86_cpu_to_node_map); - -#ifdef CONFIG_SMP -extern int x86_cpu_to_node_map_init[]; -extern void *x86_cpu_to_node_map_early_ptr; -#else -#define x86_cpu_to_node_map_early_ptr NULL -#endif +/* Mappings between node number and cpus on that node. */ extern cpumask_t node_to_cpumask_map[]; -#define NUMA_NO_NODE (-1) +/* Mappings between logical cpu number and node number */ +extern int cpu_to_node_map[]; /* Returns the number of the node containing CPU 'cpu' */ -#ifdef CONFIG_X86_32 -#define early_cpu_to_node(cpu) cpu_to_node(cpu) static inline int cpu_to_node(int cpu) { return cpu_to_node_map[cpu]; } +#define early_cpu_to_node(cpu) cpu_to_node(cpu) -#else /* CONFIG_X86_64 */ - -#ifdef CONFIG_SMP -static inline int early_cpu_to_node(int cpu) +/* Returns a bitmask of CPUs on Node 'node'. + * + * Side note: this function creates the returned cpumask on the stack + * so with a high NR_CPUS count, excessive stack space is used. The + * node_to_cpumask_ptr function should be used whenever possible. + */ +static inline cpumask_t node_to_cpumask(int node) { - int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr; - - if (cpu_to_node_map) - return cpu_to_node_map[cpu]; - else if (per_cpu_offset(cpu)) - return per_cpu(x86_cpu_to_node_map, cpu); - else - return NUMA_NO_NODE; + return node_to_cpumask_map[node]; } -#else -#define early_cpu_to_node(cpu) cpu_to_node(cpu) -#endif +#else /* CONFIG_X86_64 */ + +/* Mappings between node number and cpus on that node. */ +extern cpumask_t *node_to_cpumask_map; + +/* Mappings between logical cpu number and node number */ +DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); + +/* Returns the number of the current Node. */ +#define numa_node_id() read_pda(nodenumber) + +#ifdef CONFIG_DEBUG_PER_CPU_MAPS +extern int cpu_to_node(int cpu); +extern int early_cpu_to_node(int cpu); +extern cpumask_t *_node_to_cpumask_ptr(int node); +extern cpumask_t node_to_cpumask(int node); + +#else /* !CONFIG_DEBUG_PER_CPU_MAPS */ + +/* Returns the number of the node containing CPU 'cpu' */ static inline int cpu_to_node(int cpu) { -#ifdef CONFIG_DEBUG_PER_CPU_MAPS - if (x86_cpu_to_node_map_early_ptr) { - printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n", - (int)cpu); - dump_stack(); - return ((int *)x86_cpu_to_node_map_early_ptr)[cpu]; - } -#endif return per_cpu(x86_cpu_to_node_map, cpu); } -#ifdef CONFIG_NUMA +/* Same function but used if called before per_cpu areas are setup */ +static inline int early_cpu_to_node(int cpu) +{ + if (early_per_cpu_ptr(x86_cpu_to_node_map)) + return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; + + return per_cpu(x86_cpu_to_node_map, cpu); +} /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ +static inline cpumask_t *_node_to_cpumask_ptr(int node) +{ + return &node_to_cpumask_map[node]; +} + +/* Returns a bitmask of CPUs on Node 'node'. */ +static inline cpumask_t node_to_cpumask(int node) +{ + return node_to_cpumask_map[node]; +} + +#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ + +/* Replace default node_to_cpumask_ptr with optimized version */ #define node_to_cpumask_ptr(v, node) \ - cpumask_t *v = &(node_to_cpumask_map[node]) + cpumask_t *v = _node_to_cpumask_ptr(node) #define node_to_cpumask_ptr_next(v, node) \ - v = &(node_to_cpumask_map[node]) -#endif + v = _node_to_cpumask_ptr(node) #endif /* CONFIG_X86_64 */ @@ -117,20 +131,6 @@ static inline int cpu_to_node(int cpu) */ #define parent_node(node) (node) -/* Returns a bitmask of CPUs on Node 'node'. */ -static inline cpumask_t node_to_cpumask(int node) -{ - return node_to_cpumask_map[node]; -} - -/* Returns the number of the first CPU on Node 'node'. */ -static inline int node_to_first_cpu(int node) -{ - cpumask_t mask = node_to_cpumask(node); - - return first_cpu(mask); -} - #define pcibus_to_node(bus) __pcibus_to_node(bus) #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus) @@ -180,12 +180,44 @@ extern int __node_distance(int, int); #define node_distance(a, b) __node_distance(a, b) #endif -#else /* CONFIG_NUMA */ +#else /* !CONFIG_NUMA */ +#define numa_node_id() 0 +#define cpu_to_node(cpu) 0 +#define early_cpu_to_node(cpu) 0 + +static inline cpumask_t *_node_to_cpumask_ptr(int node) +{ + return &cpu_online_map; +} +static inline cpumask_t node_to_cpumask(int node) +{ + return cpu_online_map; +} +static inline int node_to_first_cpu(int node) +{ + return first_cpu(cpu_online_map); +} + +/* Replace default node_to_cpumask_ptr with optimized version */ +#define node_to_cpumask_ptr(v, node) \ + cpumask_t *v = _node_to_cpumask_ptr(node) + +#define node_to_cpumask_ptr_next(v, node) \ + v = _node_to_cpumask_ptr(node) #endif #include <asm-generic/topology.h> +#ifdef CONFIG_NUMA +/* Returns the number of the first CPU on Node 'node'. */ +static inline int node_to_first_cpu(int node) +{ + node_to_cpumask_ptr(mask, node); + return first_cpu(*mask); +} +#endif + extern cpumask_t cpu_coregroup_map(int cpu); #ifdef ENABLE_TOPO_DEFINES @@ -193,6 +225,9 @@ extern cpumask_t cpu_coregroup_map(int cpu); #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) + +/* indicates that pointers to the topology cpumask_t maps are valid */ +#define arch_provides_topology_pointers yes #endif static inline void arch_fix_phys_package_id(int num, u32 slot) @@ -220,4 +255,4 @@ static inline void set_mp_bus_to_node(int busnum, int node) } #endif -#endif +#endif /* _ASM_X86_TOPOLOGY_H */ |