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 35 #ifdef CONFIG_NUMA 36 #include <linux/cpumask.h> 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 extern const struct cpumask *cpu_coregroup_mask(int cpu); 106 107 #define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id) 108 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 109 #define topology_logical_die_id(cpu) (cpu_data(cpu).logical_die_id) 110 #define topology_die_id(cpu) (cpu_data(cpu).cpu_die_id) 111 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 112 113 #ifdef CONFIG_SMP 114 #define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu)) 115 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 116 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 117 118 extern unsigned int __max_logical_packages; 119 #define topology_max_packages() (__max_logical_packages) 120 121 extern unsigned int __max_die_per_package; 122 123 static inline int topology_max_die_per_package(void) 124 { 125 return __max_die_per_package; 126 } 127 128 extern int __max_smt_threads; 129 130 static inline int topology_max_smt_threads(void) 131 { 132 return __max_smt_threads; 133 } 134 135 int topology_update_package_map(unsigned int apicid, unsigned int cpu); 136 int topology_update_die_map(unsigned int dieid, unsigned int cpu); 137 int topology_phys_to_logical_pkg(unsigned int pkg); 138 int topology_phys_to_logical_die(unsigned int die, unsigned int cpu); 139 bool topology_is_primary_thread(unsigned int cpu); 140 bool topology_smt_supported(void); 141 #else 142 #define topology_max_packages() (1) 143 static inline int 144 topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; } 145 static inline int 146 topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; } 147 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; } 148 static inline int topology_phys_to_logical_die(unsigned int die, 149 unsigned int cpu) { return 0; } 150 static inline int topology_max_die_per_package(void) { return 1; } 151 static inline int topology_max_smt_threads(void) { return 1; } 152 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; } 153 static inline bool topology_smt_supported(void) { return false; } 154 #endif 155 156 static inline void arch_fix_phys_package_id(int num, u32 slot) 157 { 158 } 159 160 struct pci_bus; 161 int x86_pci_root_bus_node(int bus); 162 void x86_pci_root_bus_resources(int bus, struct list_head *resources); 163 164 extern bool x86_topology_update; 165 166 #ifdef CONFIG_SCHED_MC_PRIO 167 #include <asm/percpu.h> 168 169 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority); 170 extern unsigned int __read_mostly sysctl_sched_itmt_enabled; 171 172 /* Interface to set priority of a cpu */ 173 void sched_set_itmt_core_prio(int prio, int core_cpu); 174 175 /* Interface to notify scheduler that system supports ITMT */ 176 int sched_set_itmt_support(void); 177 178 /* Interface to notify scheduler that system revokes ITMT support */ 179 void sched_clear_itmt_support(void); 180 181 #else /* CONFIG_SCHED_MC_PRIO */ 182 183 #define sysctl_sched_itmt_enabled 0 184 static inline void sched_set_itmt_core_prio(int prio, int core_cpu) 185 { 186 } 187 static inline int sched_set_itmt_support(void) 188 { 189 return 0; 190 } 191 static inline void sched_clear_itmt_support(void) 192 { 193 } 194 #endif /* CONFIG_SCHED_MC_PRIO */ 195 196 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64) 197 #include <asm/cpufeature.h> 198 199 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key); 200 201 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key) 202 203 DECLARE_PER_CPU(unsigned long, arch_freq_scale); 204 205 static inline long arch_scale_freq_capacity(int cpu) 206 { 207 return per_cpu(arch_freq_scale, cpu); 208 } 209 #define arch_scale_freq_capacity arch_scale_freq_capacity 210 211 extern void arch_scale_freq_tick(void); 212 #define arch_scale_freq_tick arch_scale_freq_tick 213 214 extern void arch_set_max_freq_ratio(bool turbo_disabled); 215 #else 216 static inline void arch_set_max_freq_ratio(bool turbo_disabled) 217 { 218 } 219 #endif 220 221 #endif /* _ASM_X86_TOPOLOGY_H */ 222