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 */
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 /* 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 enum x86_topology_cpu_type {
118 TOPO_CPU_TYPE_PERFORMANCE,
119 TOPO_CPU_TYPE_EFFICIENCY,
120 TOPO_CPU_TYPE_UNKNOWN,
121 };
122
123 struct x86_topology_system {
124 unsigned int dom_shifts[TOPO_MAX_DOMAIN];
125 unsigned int dom_size[TOPO_MAX_DOMAIN];
126 };
127
128 extern struct x86_topology_system x86_topo_system;
129
topology_get_domain_size(enum x86_topology_domains dom)130 static inline unsigned int topology_get_domain_size(enum x86_topology_domains dom)
131 {
132 return x86_topo_system.dom_size[dom];
133 }
134
topology_get_domain_shift(enum x86_topology_domains dom)135 static inline unsigned int topology_get_domain_shift(enum x86_topology_domains dom)
136 {
137 return dom == TOPO_SMT_DOMAIN ? 0 : x86_topo_system.dom_shifts[dom - 1];
138 }
139
140 extern const struct cpumask *cpu_coregroup_mask(int cpu);
141 extern const struct cpumask *cpu_clustergroup_mask(int cpu);
142
143 #define topology_logical_package_id(cpu) (cpu_data(cpu).topo.logical_pkg_id)
144 #define topology_physical_package_id(cpu) (cpu_data(cpu).topo.pkg_id)
145 #define topology_logical_die_id(cpu) (cpu_data(cpu).topo.logical_die_id)
146 #define topology_logical_core_id(cpu) (cpu_data(cpu).topo.logical_core_id)
147 #define topology_die_id(cpu) (cpu_data(cpu).topo.die_id)
148 #define topology_core_id(cpu) (cpu_data(cpu).topo.core_id)
149 #define topology_ppin(cpu) (cpu_data(cpu).ppin)
150
151 #define topology_amd_node_id(cpu) (cpu_data(cpu).topo.amd_node_id)
152
153 extern unsigned int __max_dies_per_package;
154 extern unsigned int __max_logical_packages;
155 extern unsigned int __max_threads_per_core;
156 extern unsigned int __num_threads_per_package;
157 extern unsigned int __num_cores_per_package;
158 extern unsigned int __num_nodes_per_package;
159
160 const char *get_topology_cpu_type_name(struct cpuinfo_x86 *c);
161 enum x86_topology_cpu_type get_topology_cpu_type(struct cpuinfo_x86 *c);
162
topology_max_packages(void)163 static inline unsigned int topology_max_packages(void)
164 {
165 return __max_logical_packages;
166 }
167
topology_max_dies_per_package(void)168 static inline unsigned int topology_max_dies_per_package(void)
169 {
170 return __max_dies_per_package;
171 }
172
topology_num_cores_per_package(void)173 static inline unsigned int topology_num_cores_per_package(void)
174 {
175 return __num_cores_per_package;
176 }
177
topology_num_threads_per_package(void)178 static inline unsigned int topology_num_threads_per_package(void)
179 {
180 return __num_threads_per_package;
181 }
182
topology_num_nodes_per_package(void)183 static inline unsigned int topology_num_nodes_per_package(void)
184 {
185 return __num_nodes_per_package;
186 }
187
188 #ifdef CONFIG_X86_LOCAL_APIC
189 int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level);
190 #else
topology_get_logical_id(u32 apicid,enum x86_topology_domains at_level)191 static inline int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level)
192 {
193 return 0;
194 }
195 #endif
196
197 #ifdef CONFIG_SMP
198 #define topology_cluster_id(cpu) (cpu_data(cpu).topo.l2c_id)
199 #define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu))
200 #define topology_cluster_cpumask(cpu) (cpu_clustergroup_mask(cpu))
201 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
202 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
203
204
topology_phys_to_logical_pkg(unsigned int pkg)205 static inline int topology_phys_to_logical_pkg(unsigned int pkg)
206 {
207 return topology_get_logical_id(pkg << x86_topo_system.dom_shifts[TOPO_PKG_DOMAIN],
208 TOPO_PKG_DOMAIN);
209 }
210
211 extern int __max_smt_threads;
212
topology_max_smt_threads(void)213 static inline int topology_max_smt_threads(void)
214 {
215 return __max_smt_threads;
216 }
217
218 #include <linux/cpu_smt.h>
219
220 extern unsigned int __amd_nodes_per_pkg;
221
topology_amd_nodes_per_pkg(void)222 static inline unsigned int topology_amd_nodes_per_pkg(void)
223 {
224 return __amd_nodes_per_pkg;
225 }
226
227 #else /* CONFIG_SMP */
topology_phys_to_logical_pkg(unsigned int pkg)228 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
topology_max_smt_threads(void)229 static inline int topology_max_smt_threads(void) { return 1; }
topology_amd_nodes_per_pkg(void)230 static inline unsigned int topology_amd_nodes_per_pkg(void) { return 1; }
231 #endif /* !CONFIG_SMP */
232
233 extern struct cpumask __cpu_primary_thread_mask;
234 #define cpu_primary_thread_mask ((const struct cpumask *)&__cpu_primary_thread_mask)
235
236 /**
237 * topology_is_primary_thread - Check whether CPU is the primary SMT thread
238 * @cpu: CPU to check
239 */
topology_is_primary_thread(unsigned int cpu)240 static inline bool topology_is_primary_thread(unsigned int cpu)
241 {
242 return cpumask_test_cpu(cpu, cpu_primary_thread_mask);
243 }
244 #define topology_is_primary_thread topology_is_primary_thread
245
246 int topology_get_primary_thread(unsigned int cpu);
247
topology_is_core_online(unsigned int cpu)248 static inline bool topology_is_core_online(unsigned int cpu)
249 {
250 int pcpu = topology_get_primary_thread(cpu);
251
252 return pcpu >= 0 ? cpu_online(pcpu) : false;
253 }
254 #define topology_is_core_online topology_is_core_online
255
arch_fix_phys_package_id(int num,u32 slot)256 static inline void arch_fix_phys_package_id(int num, u32 slot)
257 {
258 }
259
260 struct pci_bus;
261 int x86_pci_root_bus_node(int bus);
262 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
263
264 extern bool x86_topology_update;
265
266 #ifdef CONFIG_SCHED_MC_PRIO
267 #include <asm/percpu.h>
268
269 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
270 extern bool __read_mostly sysctl_sched_itmt_enabled;
271
272 /* Interface to set priority of a cpu */
273 void sched_set_itmt_core_prio(int prio, int core_cpu);
274
275 /* Interface to notify scheduler that system supports ITMT */
276 int sched_set_itmt_support(void);
277
278 /* Interface to notify scheduler that system revokes ITMT support */
279 void sched_clear_itmt_support(void);
280
281 #else /* CONFIG_SCHED_MC_PRIO */
282
283 #define sysctl_sched_itmt_enabled false
sched_set_itmt_core_prio(int prio,int core_cpu)284 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
285 {
286 }
sched_set_itmt_support(void)287 static inline int sched_set_itmt_support(void)
288 {
289 return 0;
290 }
sched_clear_itmt_support(void)291 static inline void sched_clear_itmt_support(void)
292 {
293 }
294 #endif /* CONFIG_SCHED_MC_PRIO */
295
296 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
297 #include <asm/cpufeature.h>
298
299 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
300
301 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
302
303 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
304
arch_scale_freq_capacity(int cpu)305 static inline long arch_scale_freq_capacity(int cpu)
306 {
307 return per_cpu(arch_freq_scale, cpu);
308 }
309 #define arch_scale_freq_capacity arch_scale_freq_capacity
310
311 bool arch_enable_hybrid_capacity_scale(void);
312 void arch_set_cpu_capacity(int cpu, unsigned long cap, unsigned long max_cap,
313 unsigned long cap_freq, unsigned long base_freq);
314
315 unsigned long arch_scale_cpu_capacity(int cpu);
316 #define arch_scale_cpu_capacity arch_scale_cpu_capacity
317
318 extern void arch_set_max_freq_ratio(bool turbo_disabled);
319 extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled);
320 #else
arch_enable_hybrid_capacity_scale(void)321 static inline bool arch_enable_hybrid_capacity_scale(void) { return false; }
arch_set_cpu_capacity(int cpu,unsigned long cap,unsigned long max_cap,unsigned long cap_freq,unsigned long base_freq)322 static inline void arch_set_cpu_capacity(int cpu, unsigned long cap,
323 unsigned long max_cap,
324 unsigned long cap_freq,
325 unsigned long base_freq) { }
326
arch_set_max_freq_ratio(bool turbo_disabled)327 static inline void arch_set_max_freq_ratio(bool turbo_disabled) { }
freq_invariance_set_perf_ratio(u64 ratio,bool turbo_disabled)328 static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { }
329 #endif
330
331 extern void arch_scale_freq_tick(void);
332 #define arch_scale_freq_tick arch_scale_freq_tick
333
334 extern int arch_sched_node_distance(int from, int to);
335
336 #endif /* _ASM_X86_TOPOLOGY_H */
337