LXR linux/arch/x86/include/asm/topology.h

   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);
 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) \
 110        (cpu_data(cpu)._rh.logical_die_id)
 111#define topology_die_id(cpu) \
 112        (cpu_data(cpu)._rh.cpu_die_id)
 113#define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 114
 115#ifdef CONFIG_SMP
 116#define topology_die_cpumask(cpu)               (per_cpu(cpu_die_map, cpu))
 117#define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
 118#define topology_sibling_cpumask(cpu)           (per_cpu(cpu_sibling_map, cpu))
 119
 120extern unsigned int __max_logical_packages;
 121#define topology_max_packages()                 (__max_logical_packages)
 122
 123extern unsigned int __max_die_per_package;
 124
 125static inline int topology_max_die_per_package(void)
 126{
 127        return __max_die_per_package;
 128}
 129
 130extern int __max_smt_threads;
 131
 132static inline int topology_max_smt_threads(void)
 133{
 134        return __max_smt_threads;
 135}
 136
 137int topology_update_package_map(unsigned int apicid, unsigned int cpu);
 138int topology_update_die_map(unsigned int dieid, unsigned int cpu);
 139int topology_phys_to_logical_pkg(unsigned int pkg);
 140int topology_phys_to_logical_die(unsigned int die, unsigned int cpu);
 141bool topology_is_primary_thread(unsigned int cpu);
 142bool topology_smt_supported(void);
 143#else
 144#define topology_max_packages()                 (1)
 145static inline int
 146topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
 147static inline int
 148topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; }
 149static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
 150static inline int topology_phys_to_logical_die(unsigned int die,
 151                unsigned int cpu) { return 0; }
 152static inline int topology_max_die_per_package(void) { return 1; }
 153static inline int topology_max_smt_threads(void) { return 1; }
 154static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
 155static inline bool topology_smt_supported(void) { return false; }
 156#endif
 157
 158static inline void arch_fix_phys_package_id(int num, u32 slot)
 159{
 160}
 161
 162struct pci_bus;
 163int x86_pci_root_bus_node(int bus);
 164void x86_pci_root_bus_resources(int bus, struct list_head *resources);
 165
 166extern bool x86_topology_update;
 167
 168#ifdef CONFIG_SCHED_MC_PRIO
 169#include <asm/percpu.h>
 170
 171DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
 172extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
 173
 174/* Interface to set priority of a cpu */
 175void sched_set_itmt_core_prio(int prio, int core_cpu);
 176
 177/* Interface to notify scheduler that system supports ITMT */
 178int sched_set_itmt_support(void);
 179
 180/* Interface to notify scheduler that system revokes ITMT support */
 181void sched_clear_itmt_support(void);
 182
 183#else /* CONFIG_SCHED_MC_PRIO */
 184
 185#define sysctl_sched_itmt_enabled       0
 186static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
 187{
 188}
 189static inline int sched_set_itmt_support(void)
 190{
 191        return 0;
 192}
 193static inline void sched_clear_itmt_support(void)
 194{
 195}
 196#endif /* CONFIG_SCHED_MC_PRIO */
 197
 198#ifdef CONFIG_SMP
 199#include <asm/cpufeature.h>
 200
 201DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
 202
 203#define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
 204
 205DECLARE_PER_CPU(unsigned long, arch_freq_scale);
 206
 207static inline long arch_scale_freq_capacity(int cpu)
 208{
 209        return per_cpu(arch_freq_scale, cpu);
 210}
 211#define arch_scale_freq_capacity arch_scale_freq_capacity
 212
 213extern void arch_scale_freq_tick(void);
 214#define arch_scale_freq_tick arch_scale_freq_tick
 215
 216extern void arch_set_max_freq_ratio(bool turbo_disabled);
 217#else
 218static inline void arch_set_max_freq_ratio(bool turbo_disabled)
 219{
 220}
 221#endif
 222
 223#endif /* _ASM_X86_TOPOLOGY_H */
 224