1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_TOPOLOGY_H 3 #define _ASM_POWERPC_TOPOLOGY_H 4 #ifdef __KERNEL__ 5 6 7 struct device; 8 struct device_node; 9 struct 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 25 struct pci_bus; 26 #ifdef CONFIG_PCI 27 extern int pcibus_to_node(struct pci_bus *bus); 28 #else 29 static 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 39 int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc); 40 extern int __node_distance(int, int); 41 #define node_distance(a, b) __node_distance(a, b) 42 43 extern void __init dump_numa_cpu_topology(void); 44 45 extern int sysfs_add_device_to_node(struct device *dev, int nid); 46 extern void sysfs_remove_device_from_node(struct device *dev, int nid); 47 48 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) 49 { 50 numa_cpu_lookup_table[cpu] = node; 51 } 52 53 static 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 66 int of_drconf_to_nid_single(struct drmem_lmb *lmb); 67 void update_numa_distance(struct device_node *node); 68 69 extern void map_cpu_to_node(int cpu, int node); 70 #ifdef CONFIG_HOTPLUG_CPU 71 extern void unmap_cpu_from_node(unsigned long cpu); 72 #endif /* CONFIG_HOTPLUG_CPU */ 73 74 #else 75 76 static inline int early_cpu_to_node(int cpu) { return 0; } 77 78 static inline void dump_numa_cpu_topology(void) {} 79 80 static inline int sysfs_add_device_to_node(struct device *dev, int nid) 81 { 82 return 0; 83 } 84 85 static inline void sysfs_remove_device_from_node(struct device *dev, 86 int nid) 87 { 88 } 89 90 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {} 91 92 static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) 93 { 94 return 0; 95 } 96 97 static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb) 98 { 99 return first_online_node; 100 } 101 102 static inline void update_numa_distance(struct device_node *node) {} 103 104 #ifdef CONFIG_SMP 105 static inline void map_cpu_to_node(int cpu, int node) {} 106 #ifdef CONFIG_HOTPLUG_CPU 107 static 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) 114 void find_and_update_cpu_nid(int cpu); 115 extern int cpu_to_coregroup_id(int cpu); 116 #else 117 static inline void find_and_update_cpu_nid(int cpu) {} 118 static 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 #ifdef CONFIG_HOTPLUG_SMT 147 #include <linux/cpu_smt.h> 148 #include <asm/cputhreads.h> 149 150 static inline bool topology_is_primary_thread(unsigned int cpu) 151 { 152 return cpu == cpu_first_thread_sibling(cpu); 153 } 154 155 static inline bool topology_smt_thread_allowed(unsigned int cpu) 156 { 157 return cpu_thread_in_core(cpu) < cpu_smt_num_threads; 158 } 159 #endif 160 161 #endif /* __KERNEL__ */ 162 #endif /* _ASM_POWERPC_TOPOLOGY_H */ 163