topology.h (6855B)
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 */ 42DECLARE_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 */ 48extern int __cpu_to_node(int cpu); 49#define cpu_to_node __cpu_to_node 50 51extern 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 */ 56static 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. */ 64extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 65 66#ifdef CONFIG_DEBUG_PER_CPU_MAPS 67extern const struct cpumask *cpumask_of_node(int node); 68#else 69/* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 70static inline const struct cpumask *cpumask_of_node(int node) 71{ 72 return node_to_cpumask_map[node]; 73} 74#endif 75 76extern void setup_node_to_cpumask_map(void); 77 78#define pcibus_to_node(bus) __pcibus_to_node(bus) 79 80extern int __node_distance(int, int); 81#define node_distance(a, b) __node_distance(a, b) 82 83#else /* !CONFIG_NUMA */ 84 85static 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 94static inline int early_cpu_to_node(int cpu) 95{ 96 return 0; 97} 98 99static inline void setup_node_to_cpumask_map(void) { } 100 101#endif 102 103#include <asm-generic/topology.h> 104 105extern const struct cpumask *cpu_coregroup_mask(int cpu); 106extern const struct cpumask *cpu_clustergroup_mask(int cpu); 107 108#define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id) 109#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 110#define topology_logical_die_id(cpu) (cpu_data(cpu).logical_die_id) 111#define topology_die_id(cpu) (cpu_data(cpu).cpu_die_id) 112#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 113#define topology_ppin(cpu) (cpu_data(cpu).ppin) 114 115extern unsigned int __max_die_per_package; 116 117#ifdef CONFIG_SMP 118#define topology_cluster_id(cpu) (per_cpu(cpu_l2c_id, cpu)) 119#define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu)) 120#define topology_cluster_cpumask(cpu) (cpu_clustergroup_mask(cpu)) 121#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 122#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 123 124extern unsigned int __max_logical_packages; 125#define topology_max_packages() (__max_logical_packages) 126 127static inline int topology_max_die_per_package(void) 128{ 129 return __max_die_per_package; 130} 131 132extern int __max_smt_threads; 133 134static inline int topology_max_smt_threads(void) 135{ 136 return __max_smt_threads; 137} 138 139int topology_update_package_map(unsigned int apicid, unsigned int cpu); 140int topology_update_die_map(unsigned int dieid, unsigned int cpu); 141int topology_phys_to_logical_pkg(unsigned int pkg); 142int topology_phys_to_logical_die(unsigned int die, unsigned int cpu); 143bool topology_is_primary_thread(unsigned int cpu); 144bool topology_smt_supported(void); 145#else 146#define topology_max_packages() (1) 147static inline int 148topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; } 149static inline int 150topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; } 151static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; } 152static inline int topology_phys_to_logical_die(unsigned int die, 153 unsigned int cpu) { return 0; } 154static inline int topology_max_die_per_package(void) { return 1; } 155static inline int topology_max_smt_threads(void) { return 1; } 156static inline bool topology_is_primary_thread(unsigned int cpu) { return true; } 157static inline bool topology_smt_supported(void) { return false; } 158#endif 159 160static inline void arch_fix_phys_package_id(int num, u32 slot) 161{ 162} 163 164struct pci_bus; 165int x86_pci_root_bus_node(int bus); 166void x86_pci_root_bus_resources(int bus, struct list_head *resources); 167 168extern bool x86_topology_update; 169 170#ifdef CONFIG_SCHED_MC_PRIO 171#include <asm/percpu.h> 172 173DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority); 174extern unsigned int __read_mostly sysctl_sched_itmt_enabled; 175 176/* Interface to set priority of a cpu */ 177void sched_set_itmt_core_prio(int prio, int core_cpu); 178 179/* Interface to notify scheduler that system supports ITMT */ 180int sched_set_itmt_support(void); 181 182/* Interface to notify scheduler that system revokes ITMT support */ 183void sched_clear_itmt_support(void); 184 185#else /* CONFIG_SCHED_MC_PRIO */ 186 187#define sysctl_sched_itmt_enabled 0 188static inline void sched_set_itmt_core_prio(int prio, int core_cpu) 189{ 190} 191static inline int sched_set_itmt_support(void) 192{ 193 return 0; 194} 195static inline void sched_clear_itmt_support(void) 196{ 197} 198#endif /* CONFIG_SCHED_MC_PRIO */ 199 200#if defined(CONFIG_SMP) && defined(CONFIG_X86_64) 201#include <asm/cpufeature.h> 202 203DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key); 204 205#define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key) 206 207DECLARE_PER_CPU(unsigned long, arch_freq_scale); 208 209static inline long arch_scale_freq_capacity(int cpu) 210{ 211 return per_cpu(arch_freq_scale, cpu); 212} 213#define arch_scale_freq_capacity arch_scale_freq_capacity 214 215extern void arch_set_max_freq_ratio(bool turbo_disabled); 216extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled); 217#else 218static inline void arch_set_max_freq_ratio(bool turbo_disabled) { } 219static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { } 220#endif 221 222extern void arch_scale_freq_tick(void); 223#define arch_scale_freq_tick arch_scale_freq_tick 224 225#ifdef CONFIG_ACPI_CPPC_LIB 226void init_freq_invariance_cppc(void); 227#define arch_init_invariance_cppc init_freq_invariance_cppc 228#endif 229 230#endif /* _ASM_X86_TOPOLOGY_H */