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 */
early_cpu_to_node(int cpu)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'. */
cpumask_of_node(int 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
numa_node_id(void)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
early_cpu_to_node(int cpu)94 static inline int early_cpu_to_node(int cpu)
95 {
96 return 0;
97 }
98
setup_node_to_cpumask_map(void)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 extern 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
114 extern unsigned int __max_die_per_package;
115
116 #ifdef CONFIG_SMP
117 #define topology_cluster_id(cpu) (per_cpu(cpu_l2c_id, cpu))
118 #define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu))
119 #define topology_cluster_cpumask(cpu) (cpu_clustergroup_mask(cpu))
120 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
121 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
122
123 extern unsigned int __max_logical_packages;
124 #define topology_max_packages() (__max_logical_packages)
125
topology_max_die_per_package(void)126 static inline int topology_max_die_per_package(void)
127 {
128 return __max_die_per_package;
129 }
130
131 extern int __max_smt_threads;
132
topology_max_smt_threads(void)133 static inline int topology_max_smt_threads(void)
134 {
135 return __max_smt_threads;
136 }
137
138 int topology_update_package_map(unsigned int apicid, unsigned int cpu);
139 int topology_update_die_map(unsigned int dieid, unsigned int cpu);
140 int topology_phys_to_logical_pkg(unsigned int pkg);
141 int topology_phys_to_logical_die(unsigned int die, unsigned int cpu);
142 bool topology_is_primary_thread(unsigned int cpu);
143 bool topology_smt_supported(void);
144 #else
145 #define topology_max_packages() (1)
146 static inline int
topology_update_package_map(unsigned int apicid,unsigned int cpu)147 topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
148 static inline int
topology_update_die_map(unsigned int dieid,unsigned int cpu)149 topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; }
topology_phys_to_logical_pkg(unsigned int pkg)150 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
topology_phys_to_logical_die(unsigned int die,unsigned int cpu)151 static inline int topology_phys_to_logical_die(unsigned int die,
152 unsigned int cpu) { return 0; }
topology_max_die_per_package(void)153 static inline int topology_max_die_per_package(void) { return 1; }
topology_max_smt_threads(void)154 static inline int topology_max_smt_threads(void) { return 1; }
topology_is_primary_thread(unsigned int cpu)155 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
topology_smt_supported(void)156 static inline bool topology_smt_supported(void) { return false; }
157 #endif
158
arch_fix_phys_package_id(int num,u32 slot)159 static inline void arch_fix_phys_package_id(int num, u32 slot)
160 {
161 }
162
163 struct pci_bus;
164 int x86_pci_root_bus_node(int bus);
165 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
166
167 extern bool x86_topology_update;
168
169 #ifdef CONFIG_SCHED_MC_PRIO
170 #include <asm/percpu.h>
171
172 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
173 extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
174
175 /* Interface to set priority of a cpu */
176 void sched_set_itmt_core_prio(int prio, int core_cpu);
177
178 /* Interface to notify scheduler that system supports ITMT */
179 int sched_set_itmt_support(void);
180
181 /* Interface to notify scheduler that system revokes ITMT support */
182 void sched_clear_itmt_support(void);
183
184 #else /* CONFIG_SCHED_MC_PRIO */
185
186 #define sysctl_sched_itmt_enabled 0
sched_set_itmt_core_prio(int prio,int core_cpu)187 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
188 {
189 }
sched_set_itmt_support(void)190 static inline int sched_set_itmt_support(void)
191 {
192 return 0;
193 }
sched_clear_itmt_support(void)194 static inline void sched_clear_itmt_support(void)
195 {
196 }
197 #endif /* CONFIG_SCHED_MC_PRIO */
198
199 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
200 #include <asm/cpufeature.h>
201
202 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
203
204 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
205
206 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
207
arch_scale_freq_capacity(int cpu)208 static inline long arch_scale_freq_capacity(int cpu)
209 {
210 return per_cpu(arch_freq_scale, cpu);
211 }
212 #define arch_scale_freq_capacity arch_scale_freq_capacity
213
214 extern void arch_scale_freq_tick(void);
215 #define arch_scale_freq_tick arch_scale_freq_tick
216
217 extern void arch_set_max_freq_ratio(bool turbo_disabled);
218 #else
arch_set_max_freq_ratio(bool turbo_disabled)219 static inline void arch_set_max_freq_ratio(bool turbo_disabled)
220 {
221 }
222 #endif
223
224 #ifdef CONFIG_ACPI_CPPC_LIB
225 void init_freq_invariance_cppc(void);
226 #define init_freq_invariance_cppc init_freq_invariance_cppc
227 #endif
228
229 #endif /* _ASM_X86_TOPOLOGY_H */
230