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 #include <linux/cpumask.h>
35
36 #ifdef CONFIG_NUMA
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 /* Topology information */
106 enum x86_topology_domains {
107 TOPO_SMT_DOMAIN,
108 TOPO_CORE_DOMAIN,
109 TOPO_MODULE_DOMAIN,
110 TOPO_TILE_DOMAIN,
111 TOPO_DIE_DOMAIN,
112 TOPO_DIEGRP_DOMAIN,
113 TOPO_PKG_DOMAIN,
114 TOPO_MAX_DOMAIN,
115 };
116
117 struct x86_topology_system {
118 unsigned int dom_shifts[TOPO_MAX_DOMAIN];
119 unsigned int dom_size[TOPO_MAX_DOMAIN];
120 };
121
122 extern struct x86_topology_system x86_topo_system;
123
124 static inline unsigned int topology_get_domain_size(enum x86_topology_domains dom)
125 {
126 return x86_topo_system.dom_size[dom];
127 }
128
129 static inline unsigned int topology_get_domain_shift(enum x86_topology_domains dom)
130 {
131 return dom == TOPO_SMT_DOMAIN ? 0 : x86_topo_system.dom_shifts[dom - 1];
132 }
133
134 extern const struct cpumask *cpu_coregroup_mask(int cpu);
135 extern const struct cpumask *cpu_clustergroup_mask(int cpu);
136
137 #define topology_logical_package_id(cpu) (cpu_data(cpu).topo.logical_pkg_id)
138 #define topology_physical_package_id(cpu) (cpu_data(cpu).topo.pkg_id)
139 #define topology_logical_die_id(cpu) (cpu_data(cpu).topo.logical_die_id)
140 #define topology_die_id(cpu) (cpu_data(cpu).topo.die_id)
141 #define topology_core_id(cpu) (cpu_data(cpu).topo.core_id)
142 #define topology_ppin(cpu) (cpu_data(cpu).ppin)
143
144 #define topology_amd_node_id(cpu) (cpu_data(cpu).topo.amd_node_id)
145
146 extern unsigned int __max_dies_per_package;
147 extern unsigned int __max_logical_packages;
148 extern unsigned int __max_threads_per_core;
149 extern unsigned int __num_threads_per_package;
150 extern unsigned int __num_cores_per_package;
151
152 static inline unsigned int topology_max_packages(void)
153 {
154 return __max_logical_packages;
155 }
156
157 static inline unsigned int topology_max_dies_per_package(void)
158 {
159 return __max_dies_per_package;
160 }
161
162 static inline unsigned int topology_num_cores_per_package(void)
163 {
164 return __num_cores_per_package;
165 }
166
167 static inline unsigned int topology_num_threads_per_package(void)
168 {
169 return __num_threads_per_package;
170 }
171
172 #ifdef CONFIG_X86_LOCAL_APIC
173 int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level);
174 #else
175 static inline int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level)
176 {
177 return 0;
178 }
179 #endif
180
181 #ifdef CONFIG_SMP
182 #define topology_cluster_id(cpu) (cpu_data(cpu).topo.l2c_id)
183 #define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu))
184 #define topology_cluster_cpumask(cpu) (cpu_clustergroup_mask(cpu))
185 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
186 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
187
188
189 static inline int topology_phys_to_logical_pkg(unsigned int pkg)
190 {
191 return topology_get_logical_id(pkg << x86_topo_system.dom_shifts[TOPO_PKG_DOMAIN],
192 TOPO_PKG_DOMAIN);
193 }
194
195 extern int __max_smt_threads;
196
197 static inline int topology_max_smt_threads(void)
198 {
199 return __max_smt_threads;
200 }
201
202 #include <linux/cpu_smt.h>
203
204 extern unsigned int __amd_nodes_per_pkg;
205
206 static inline unsigned int topology_amd_nodes_per_pkg(void)
207 {
208 return __amd_nodes_per_pkg;
209 }
210
211 extern struct cpumask __cpu_primary_thread_mask;
212 #define cpu_primary_thread_mask ((const struct cpumask *)&__cpu_primary_thread_mask)
213
214 /**
215 * topology_is_primary_thread - Check whether CPU is the primary SMT thread
216 * @cpu: CPU to check
217 */
218 static inline bool topology_is_primary_thread(unsigned int cpu)
219 {
220 return cpumask_test_cpu(cpu, cpu_primary_thread_mask);
221 }
222
223 #else /* CONFIG_SMP */
224 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
225 static inline int topology_max_smt_threads(void) { return 1; }
226 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
227 static inline unsigned int topology_amd_nodes_per_pkg(void) { return 1; }
228 #endif /* !CONFIG_SMP */
229
230 static inline void arch_fix_phys_package_id(int num, u32 slot)
231 {
232 }
233
234 struct pci_bus;
235 int x86_pci_root_bus_node(int bus);
236 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
237
238 extern bool x86_topology_update;
239
240 #ifdef CONFIG_SCHED_MC_PRIO
241 #include <asm/percpu.h>
242
243 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
244 extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
245
246 /* Interface to set priority of a cpu */
247 void sched_set_itmt_core_prio(int prio, int core_cpu);
248
249 /* Interface to notify scheduler that system supports ITMT */
250 int sched_set_itmt_support(void);
251
252 /* Interface to notify scheduler that system revokes ITMT support */
253 void sched_clear_itmt_support(void);
254
255 #else /* CONFIG_SCHED_MC_PRIO */
256
257 #define sysctl_sched_itmt_enabled 0
258 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
259 {
260 }
261 static inline int sched_set_itmt_support(void)
262 {
263 return 0;
264 }
265 static inline void sched_clear_itmt_support(void)
266 {
267 }
268 #endif /* CONFIG_SCHED_MC_PRIO */
269
270 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
271 #include <asm/cpufeature.h>
272
273 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
274
275 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
276
277 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
278
279 static inline long arch_scale_freq_capacity(int cpu)
280 {
281 return per_cpu(arch_freq_scale, cpu);
282 }
283 #define arch_scale_freq_capacity arch_scale_freq_capacity
284
285 extern void arch_set_max_freq_ratio(bool turbo_disabled);
286 extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled);
287 #else
288 static inline void arch_set_max_freq_ratio(bool turbo_disabled) { }
289 static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { }
290 #endif
291
292 extern void arch_scale_freq_tick(void);
293 #define arch_scale_freq_tick arch_scale_freq_tick
294
295 #ifdef CONFIG_ACPI_CPPC_LIB
296 void init_freq_invariance_cppc(void);
297 #define arch_init_invariance_cppc init_freq_invariance_cppc
298 #endif
299
300 #endif /* _ASM_X86_TOPOLOGY_H */
301
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.