xref: /openbmc/linux/arch/x86/include/asm/topology.h (revision 44900c3e)
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 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 #define topology_ppin(cpu)			(cpu_data(cpu).ppin)
114 
115 extern unsigned int __max_die_per_package;
116 
117 #ifdef CONFIG_SMP
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))
123 
124 extern unsigned int __max_logical_packages;
125 #define topology_max_packages()			(__max_logical_packages)
126 
127 static inline int topology_max_die_per_package(void)
128 {
129 	return __max_die_per_package;
130 }
131 
132 extern int __max_smt_threads;
133 
134 static inline int topology_max_smt_threads(void)
135 {
136 	return __max_smt_threads;
137 }
138 
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 bool topology_smt_supported(void);
143 
144 extern struct cpumask __cpu_primary_thread_mask;
145 #define cpu_primary_thread_mask ((const struct cpumask *)&__cpu_primary_thread_mask)
146 
147 /**
148  * topology_is_primary_thread - Check whether CPU is the primary SMT thread
149  * @cpu:	CPU to check
150  */
151 static inline bool topology_is_primary_thread(unsigned int cpu)
152 {
153 	return cpumask_test_cpu(cpu, cpu_primary_thread_mask);
154 }
155 #else /* CONFIG_SMP */
156 #define topology_max_packages()			(1)
157 static inline int
158 topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
159 static inline int
160 topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; }
161 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
162 static inline int topology_max_die_per_package(void) { return 1; }
163 static inline int topology_max_smt_threads(void) { return 1; }
164 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
165 static inline bool topology_smt_supported(void) { return false; }
166 #endif /* !CONFIG_SMP */
167 
168 static inline void arch_fix_phys_package_id(int num, u32 slot)
169 {
170 }
171 
172 struct pci_bus;
173 int x86_pci_root_bus_node(int bus);
174 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
175 
176 extern bool x86_topology_update;
177 
178 #ifdef CONFIG_SCHED_MC_PRIO
179 #include <asm/percpu.h>
180 
181 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
182 extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
183 
184 /* Interface to set priority of a cpu */
185 void sched_set_itmt_core_prio(int prio, int core_cpu);
186 
187 /* Interface to notify scheduler that system supports ITMT */
188 int sched_set_itmt_support(void);
189 
190 /* Interface to notify scheduler that system revokes ITMT support */
191 void sched_clear_itmt_support(void);
192 
193 #else /* CONFIG_SCHED_MC_PRIO */
194 
195 #define sysctl_sched_itmt_enabled	0
196 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
197 {
198 }
199 static inline int sched_set_itmt_support(void)
200 {
201 	return 0;
202 }
203 static inline void sched_clear_itmt_support(void)
204 {
205 }
206 #endif /* CONFIG_SCHED_MC_PRIO */
207 
208 #if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
209 #include <asm/cpufeature.h>
210 
211 DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
212 
213 #define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
214 
215 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
216 
217 static inline long arch_scale_freq_capacity(int cpu)
218 {
219 	return per_cpu(arch_freq_scale, cpu);
220 }
221 #define arch_scale_freq_capacity arch_scale_freq_capacity
222 
223 extern void arch_set_max_freq_ratio(bool turbo_disabled);
224 extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled);
225 #else
226 static inline void arch_set_max_freq_ratio(bool turbo_disabled) { }
227 static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { }
228 #endif
229 
230 extern void arch_scale_freq_tick(void);
231 #define arch_scale_freq_tick arch_scale_freq_tick
232 
233 #ifdef CONFIG_ACPI_CPPC_LIB
234 void init_freq_invariance_cppc(void);
235 #define arch_init_invariance_cppc init_freq_invariance_cppc
236 #endif
237 
238 #endif /* _ASM_X86_TOPOLOGY_H */
239