2 * Written by: Matthew Dobson, IBM Corporation
4 * Copyright (C) 2002, IBM Corp.
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.
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
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.
23 * Send feedback to <colpatch@us.ibm.com>
25 #ifndef _ASM_X86_TOPOLOGY_H
26 #define _ASM_X86_TOPOLOGY_H
29 * to preserve the visibility of NUMA_NO_NODE definition,
30 * moved to there from here. May be used independent of
33 #include <linux/numa.h>
36 #include <linux/cpumask.h>
38 #include <asm/mpspec.h>
39 #include <asm/percpu.h>
41 /* Mappings between logical cpu number and node number */
42 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
44 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
46 * override generic percpu implementation of cpu_to_node
48 extern int __cpu_to_node(int cpu);
49 #define cpu_to_node __cpu_to_node
51 extern int early_cpu_to_node(int cpu);
53 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
55 /* Same function but used if called before per_cpu areas are setup */
56 static inline int early_cpu_to_node(int cpu)
58 return early_per_cpu(x86_cpu_to_node_map, cpu);
61 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
63 /* Mappings between node number and cpus on that node. */
64 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
66 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
67 extern const struct cpumask *cpumask_of_node(int node);
69 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
70 static inline const struct cpumask *cpumask_of_node(int node)
72 return node_to_cpumask_map[node];
76 extern void setup_node_to_cpumask_map(void);
78 #define pcibus_to_node(bus) __pcibus_to_node(bus)
80 extern int __node_distance(int, int);
81 #define node_distance(a, b) __node_distance(a, b)
83 #else /* !CONFIG_NUMA */
85 static inline int numa_node_id(void)
92 #define numa_node_id numa_node_id
94 static inline int early_cpu_to_node(int cpu)
99 static inline void setup_node_to_cpumask_map(void) { }
103 #include <asm-generic/topology.h>
105 extern const struct cpumask *cpu_coregroup_mask(int cpu);
106 extern const struct cpumask *cpu_clustergroup_mask(int cpu);
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)
115 extern unsigned int __max_die_per_package;
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))
124 extern unsigned int __max_logical_packages;
125 #define topology_max_packages() (__max_logical_packages)
127 static inline int topology_max_die_per_package(void)
129 return __max_die_per_package;
132 extern int __max_smt_threads;
134 static inline int topology_max_smt_threads(void)
136 return __max_smt_threads;
139 int topology_update_package_map(unsigned int apicid, unsigned int cpu);
140 int topology_update_die_map(unsigned int dieid, unsigned int cpu);
141 int topology_phys_to_logical_pkg(unsigned int pkg);
142 int topology_phys_to_logical_die(unsigned int die, unsigned int cpu);
143 bool topology_is_primary_thread(unsigned int cpu);
144 bool topology_smt_supported(void);
146 #define topology_max_packages() (1)
148 topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
150 topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; }
151 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
152 static inline int topology_phys_to_logical_die(unsigned int die,
153 unsigned int cpu) { return 0; }
154 static inline int topology_max_die_per_package(void) { return 1; }
155 static inline int topology_max_smt_threads(void) { return 1; }
156 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
157 static inline bool topology_smt_supported(void) { return false; }
160 static inline void arch_fix_phys_package_id(int num, u32 slot)
165 int x86_pci_root_bus_node(int bus);
166 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
168 extern bool x86_topology_update;
170 #ifdef CONFIG_SCHED_MC_PRIO
171 #include <asm/percpu.h>
173 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
174 extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
176 /* Interface to set priority of a cpu */
177 void sched_set_itmt_core_prio(int prio, int core_cpu);
179 /* Interface to notify scheduler that system supports ITMT */
180 int sched_set_itmt_support(void);
182 /* Interface to notify scheduler that system revokes ITMT support */
183 void sched_clear_itmt_support(void);
185 #else /* CONFIG_SCHED_MC_PRIO */
187 #define sysctl_sched_itmt_enabled 0
188 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
191 static inline int sched_set_itmt_support(void)
195 static inline void sched_clear_itmt_support(void)
198 #endif /* CONFIG_SCHED_MC_PRIO */
200 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
201 #include <asm/cpufeature.h>
203 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
205 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
207 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
209 static inline long arch_scale_freq_capacity(int cpu)
211 return per_cpu(arch_freq_scale, cpu);
213 #define arch_scale_freq_capacity arch_scale_freq_capacity
215 extern void arch_set_max_freq_ratio(bool turbo_disabled);
216 extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled);
218 static inline void arch_set_max_freq_ratio(bool turbo_disabled) { }
219 static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { }
222 extern void arch_scale_freq_tick(void);
223 #define arch_scale_freq_tick arch_scale_freq_tick
225 #ifdef CONFIG_ACPI_CPPC_LIB
226 void init_freq_invariance_cppc(void);
227 #define arch_init_invariance_cppc init_freq_invariance_cppc
230 #endif /* _ASM_X86_TOPOLOGY_H */