topology.h (3518B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_POWERPC_TOPOLOGY_H 3#define _ASM_POWERPC_TOPOLOGY_H 4#ifdef __KERNEL__ 5 6 7struct device; 8struct device_node; 9struct drmem_lmb; 10 11#ifdef CONFIG_NUMA 12 13/* 14 * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that 15 * all zones on all nodes will be eligible for zone_reclaim(). 16 */ 17#define RECLAIM_DISTANCE 10 18 19#include <asm/mmzone.h> 20 21#define cpumask_of_node(node) ((node) == -1 ? \ 22 cpu_all_mask : \ 23 node_to_cpumask_map[node]) 24 25struct pci_bus; 26#ifdef CONFIG_PCI 27extern int pcibus_to_node(struct pci_bus *bus); 28#else 29static inline int pcibus_to_node(struct pci_bus *bus) 30{ 31 return -1; 32} 33#endif 34 35#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \ 36 cpu_all_mask : \ 37 cpumask_of_node(pcibus_to_node(bus))) 38 39int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc); 40extern int __node_distance(int, int); 41#define node_distance(a, b) __node_distance(a, b) 42 43extern void __init dump_numa_cpu_topology(void); 44 45extern int sysfs_add_device_to_node(struct device *dev, int nid); 46extern void sysfs_remove_device_from_node(struct device *dev, int nid); 47 48static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) 49{ 50 numa_cpu_lookup_table[cpu] = node; 51} 52 53static inline int early_cpu_to_node(int cpu) 54{ 55 int nid; 56 57 nid = numa_cpu_lookup_table[cpu]; 58 59 /* 60 * Fall back to node 0 if nid is unset (it should be, except bugs). 61 * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)). 62 */ 63 return (nid < 0) ? 0 : nid; 64} 65 66int of_drconf_to_nid_single(struct drmem_lmb *lmb); 67void update_numa_distance(struct device_node *node); 68 69extern void map_cpu_to_node(int cpu, int node); 70#ifdef CONFIG_HOTPLUG_CPU 71extern void unmap_cpu_from_node(unsigned long cpu); 72#endif /* CONFIG_HOTPLUG_CPU */ 73 74#else 75 76static inline int early_cpu_to_node(int cpu) { return 0; } 77 78static inline void dump_numa_cpu_topology(void) {} 79 80static inline int sysfs_add_device_to_node(struct device *dev, int nid) 81{ 82 return 0; 83} 84 85static inline void sysfs_remove_device_from_node(struct device *dev, 86 int nid) 87{ 88} 89 90static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {} 91 92static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) 93{ 94 return 0; 95} 96 97static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb) 98{ 99 return first_online_node; 100} 101 102static inline void update_numa_distance(struct device_node *node) {} 103 104#ifdef CONFIG_SMP 105static inline void map_cpu_to_node(int cpu, int node) {} 106#ifdef CONFIG_HOTPLUG_CPU 107static inline void unmap_cpu_from_node(unsigned long cpu) {} 108#endif /* CONFIG_HOTPLUG_CPU */ 109#endif /* CONFIG_SMP */ 110 111#endif /* CONFIG_NUMA */ 112 113#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) 114void find_and_update_cpu_nid(int cpu); 115extern int cpu_to_coregroup_id(int cpu); 116#else 117static inline void find_and_update_cpu_nid(int cpu) {} 118static inline int cpu_to_coregroup_id(int cpu) 119{ 120#ifdef CONFIG_SMP 121 return cpu_to_core_id(cpu); 122#else 123 return 0; 124#endif 125} 126 127#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */ 128 129#include <asm-generic/topology.h> 130 131#ifdef CONFIG_SMP 132#include <asm/cputable.h> 133 134#ifdef CONFIG_PPC64 135#include <asm/smp.h> 136 137#define topology_physical_package_id(cpu) (cpu_to_chip_id(cpu)) 138 139#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 140#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 141#define topology_core_id(cpu) (cpu_to_core_id(cpu)) 142 143#endif 144#endif 145 146#endif /* __KERNEL__ */ 147#endif /* _ASM_POWERPC_TOPOLOGY_H */