1 /* 2 * Written by: Matthew Dobson, IBM Corporation 3 * 4 * Copyright (C) 2002, IBM Corp. 5 * 6 * All rights reserved. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 16 * NON INFRINGEMENT. See the GNU General Public License for more 17 * details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Send feedback to <colpatch@us.ibm.com> 24 */ 25 #ifndef _ASM_X86_TOPOLOGY_H 26 #define _ASM_X86_TOPOLOGY_H 27 28 /* 29 * to preserve the visibility of NUMA_NO_NODE definition, 30 * moved to there from here. May be used independent of 31 * CONFIG_NUMA. 32 */ 33 #include <linux/numa.h> 34 #include <linux/cpumask.h> 35 36 #ifdef CONFIG_NUMA 37 38 #include <asm/mpspec.h> 39 #include <asm/percpu.h> 40 41 /* Mappings between logical cpu number and node number */ 42 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); 43 44 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 45 /* 46 * override generic percpu implementation of cpu_to_node 47 */ 48 extern int __cpu_to_node(int cpu); 49 #define cpu_to_node __cpu_to_node 50 51 extern int early_cpu_to_node(int cpu); 52 53 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ 54 55 /* Same function but used if called before per_cpu areas are setup */ 56 static inline int early_cpu_to_node(int cpu) 57 { 58 return early_per_cpu(x86_cpu_to_node_map, cpu); 59 } 60 61 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ 62 63 /* Mappings between node number and cpus on that node. */ 64 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 65 66 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 67 extern const struct cpumask *cpumask_of_node(int node); 68 #else 69 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 70 static inline const struct cpumask *cpumask_of_node(int node) 71 { 72 return node_to_cpumask_map[node]; 73 } 74 #endif 75 76 extern void setup_node_to_cpumask_map(void); 77 78 #define pcibus_to_node(bus) __pcibus_to_node(bus) 79 80 extern int __node_distance(int, int); 81 #define node_distance(a, b) __node_distance(a, b) 82 83 #else /* !CONFIG_NUMA */ 84 85 static inline int numa_node_id(void) 86 { 87 return 0; 88 } 89 /* 90 * indicate override: 91 */ 92 #define numa_node_id numa_node_id 93 94 static inline int early_cpu_to_node(int cpu) 95 { 96 return 0; 97 } 98 99 static inline void setup_node_to_cpumask_map(void) { } 100 101 #endif 102 103 #include <asm-generic/topology.h> 104 105 /* Topology information */ 106 enum x86_topology_domains { 107 TOPO_SMT_DOMAIN, 108 TOPO_CORE_DOMAIN, 109 TOPO_MODULE_DOMAIN, 110 TOPO_TILE_DOMAIN, 111 TOPO_DIE_DOMAIN, 112 TOPO_DIEGRP_DOMAIN, 113 TOPO_PKG_DOMAIN, 114 TOPO_MAX_DOMAIN, 115 }; 116 117 enum x86_topology_cpu_type { 118 TOPO_CPU_TYPE_PERFORMANCE, 119 TOPO_CPU_TYPE_EFFICIENCY, 120 TOPO_CPU_TYPE_UNKNOWN, 121 }; 122 123 struct x86_topology_system { 124 unsigned int dom_shifts[TOPO_MAX_DOMAIN]; 125 unsigned int dom_size[TOPO_MAX_DOMAIN]; 126 }; 127 128 extern struct x86_topology_system x86_topo_system; 129 130 static inline unsigned int topology_get_domain_size(enum x86_topology_domains dom) 131 { 132 return x86_topo_system.dom_size[dom]; 133 } 134 135 static inline unsigned int topology_get_domain_shift(enum x86_topology_domains dom) 136 { 137 return dom == TOPO_SMT_DOMAIN ? 0 : x86_topo_system.dom_shifts[dom - 1]; 138 } 139 140 extern const struct cpumask *cpu_coregroup_mask(int cpu); 141 extern const struct cpumask *cpu_clustergroup_mask(int cpu); 142 143 #define topology_logical_package_id(cpu) (cpu_data(cpu).topo.logical_pkg_id) 144 #define topology_physical_package_id(cpu) (cpu_data(cpu).topo.pkg_id) 145 #define topology_logical_die_id(cpu) (cpu_data(cpu).topo.logical_die_id) 146 #define topology_logical_core_id(cpu) (cpu_data(cpu).topo.logical_core_id) 147 #define topology_die_id(cpu) (cpu_data(cpu).topo.die_id) 148 #define topology_core_id(cpu) (cpu_data(cpu).topo.core_id) 149 #define topology_ppin(cpu) (cpu_data(cpu).ppin) 150 151 #define topology_amd_node_id(cpu) (cpu_data(cpu).topo.amd_node_id) 152 153 extern unsigned int __max_dies_per_package; 154 extern unsigned int __max_logical_packages; 155 extern unsigned int __max_threads_per_core; 156 extern unsigned int __num_threads_per_package; 157 extern unsigned int __num_cores_per_package; 158 159 const char *get_topology_cpu_type_name(struct cpuinfo_x86 *c); 160 enum x86_topology_cpu_type get_topology_cpu_type(struct cpuinfo_x86 *c); 161 162 static inline unsigned int topology_max_packages(void) 163 { 164 return __max_logical_packages; 165 } 166 167 static inline unsigned int topology_max_dies_per_package(void) 168 { 169 return __max_dies_per_package; 170 } 171 172 static inline unsigned int topology_num_cores_per_package(void) 173 { 174 return __num_cores_per_package; 175 } 176 177 static inline unsigned int topology_num_threads_per_package(void) 178 { 179 return __num_threads_per_package; 180 } 181 182 #ifdef CONFIG_X86_LOCAL_APIC 183 int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level); 184 #else 185 static inline int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level) 186 { 187 return 0; 188 } 189 #endif 190 191 #ifdef CONFIG_SMP 192 #define topology_cluster_id(cpu) (cpu_data(cpu).topo.l2c_id) 193 #define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu)) 194 #define topology_cluster_cpumask(cpu) (cpu_clustergroup_mask(cpu)) 195 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 196 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 197 198 199 static inline int topology_phys_to_logical_pkg(unsigned int pkg) 200 { 201 return topology_get_logical_id(pkg << x86_topo_system.dom_shifts[TOPO_PKG_DOMAIN], 202 TOPO_PKG_DOMAIN); 203 } 204 205 extern int __max_smt_threads; 206 207 static inline int topology_max_smt_threads(void) 208 { 209 return __max_smt_threads; 210 } 211 212 #include <linux/cpu_smt.h> 213 214 extern unsigned int __amd_nodes_per_pkg; 215 216 static inline unsigned int topology_amd_nodes_per_pkg(void) 217 { 218 return __amd_nodes_per_pkg; 219 } 220 221 extern struct cpumask __cpu_primary_thread_mask; 222 #define cpu_primary_thread_mask ((const struct cpumask *)&__cpu_primary_thread_mask) 223 224 /** 225 * topology_is_primary_thread - Check whether CPU is the primary SMT thread 226 * @cpu: CPU to check 227 */ 228 static inline bool topology_is_primary_thread(unsigned int cpu) 229 { 230 return cpumask_test_cpu(cpu, cpu_primary_thread_mask); 231 } 232 233 #else /* CONFIG_SMP */ 234 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; } 235 static inline int topology_max_smt_threads(void) { return 1; } 236 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; } 237 static inline unsigned int topology_amd_nodes_per_pkg(void) { return 1; } 238 #endif /* !CONFIG_SMP */ 239 240 static inline void arch_fix_phys_package_id(int num, u32 slot) 241 { 242 } 243 244 struct pci_bus; 245 int x86_pci_root_bus_node(int bus); 246 void x86_pci_root_bus_resources(int bus, struct list_head *resources); 247 248 extern bool x86_topology_update; 249 250 #ifdef CONFIG_SCHED_MC_PRIO 251 #include <asm/percpu.h> 252 253 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority); 254 extern bool __read_mostly sysctl_sched_itmt_enabled; 255 256 /* Interface to set priority of a cpu */ 257 void sched_set_itmt_core_prio(int prio, int core_cpu); 258 259 /* Interface to notify scheduler that system supports ITMT */ 260 int sched_set_itmt_support(void); 261 262 /* Interface to notify scheduler that system revokes ITMT support */ 263 void sched_clear_itmt_support(void); 264 265 #else /* CONFIG_SCHED_MC_PRIO */ 266 267 #define sysctl_sched_itmt_enabled false 268 static inline void sched_set_itmt_core_prio(int prio, int core_cpu) 269 { 270 } 271 static inline int sched_set_itmt_support(void) 272 { 273 return 0; 274 } 275 static inline void sched_clear_itmt_support(void) 276 { 277 } 278 #endif /* CONFIG_SCHED_MC_PRIO */ 279 280 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64) 281 #include <asm/cpufeature.h> 282 283 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key); 284 285 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key) 286 287 DECLARE_PER_CPU(unsigned long, arch_freq_scale); 288 289 static inline long arch_scale_freq_capacity(int cpu) 290 { 291 return per_cpu(arch_freq_scale, cpu); 292 } 293 #define arch_scale_freq_capacity arch_scale_freq_capacity 294 295 bool arch_enable_hybrid_capacity_scale(void); 296 void arch_set_cpu_capacity(int cpu, unsigned long cap, unsigned long max_cap, 297 unsigned long cap_freq, unsigned long base_freq); 298 299 unsigned long arch_scale_cpu_capacity(int cpu); 300 #define arch_scale_cpu_capacity arch_scale_cpu_capacity 301 302 extern void arch_set_max_freq_ratio(bool turbo_disabled); 303 extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled); 304 #else 305 static inline bool arch_enable_hybrid_capacity_scale(void) { return false; } 306 static inline void arch_set_cpu_capacity(int cpu, unsigned long cap, 307 unsigned long max_cap, 308 unsigned long cap_freq, 309 unsigned long base_freq) { } 310 311 static inline void arch_set_max_freq_ratio(bool turbo_disabled) { } 312 static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { } 313 #endif 314 315 extern void arch_scale_freq_tick(void); 316 #define arch_scale_freq_tick arch_scale_freq_tick 317 318 #endif /* _ASM_X86_TOPOLOGY_H */ 319