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
107 #define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id)
108 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
109 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
110
111 #ifdef CONFIG_SMP
112 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
113 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
114
115 extern unsigned int __max_logical_packages;
116 #define topology_max_packages() (__max_logical_packages)
117
118 extern int __max_smt_threads;
119
topology_max_smt_threads(void)120 static inline int topology_max_smt_threads(void)
121 {
122 return __max_smt_threads;
123 }
124
125 int topology_update_package_map(unsigned int apicid, unsigned int cpu);
126 int topology_phys_to_logical_pkg(unsigned int pkg);
127 bool topology_is_primary_thread(unsigned int cpu);
128 bool topology_smt_supported(void);
129 #else
130 #define topology_max_packages() (1)
131 static inline int
topology_update_package_map(unsigned int apicid,unsigned int cpu)132 topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
topology_phys_to_logical_pkg(unsigned int pkg)133 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
topology_max_smt_threads(void)134 static inline int topology_max_smt_threads(void) { return 1; }
topology_is_primary_thread(unsigned int cpu)135 static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
topology_smt_supported(void)136 static inline bool topology_smt_supported(void) { return false; }
137 #endif
138
arch_fix_phys_package_id(int num,u32 slot)139 static inline void arch_fix_phys_package_id(int num, u32 slot)
140 {
141 }
142
143 struct pci_bus;
144 int x86_pci_root_bus_node(int bus);
145 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
146
147 extern bool x86_topology_update;
148
149 #ifdef CONFIG_SCHED_MC_PRIO
150 #include <asm/percpu.h>
151
152 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
153 extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
154
155 /* Interface to set priority of a cpu */
156 void sched_set_itmt_core_prio(int prio, int core_cpu);
157
158 /* Interface to notify scheduler that system supports ITMT */
159 int sched_set_itmt_support(void);
160
161 /* Interface to notify scheduler that system revokes ITMT support */
162 void sched_clear_itmt_support(void);
163
164 #else /* CONFIG_SCHED_MC_PRIO */
165
166 #define sysctl_sched_itmt_enabled 0
sched_set_itmt_core_prio(int prio,int core_cpu)167 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
168 {
169 }
sched_set_itmt_support(void)170 static inline int sched_set_itmt_support(void)
171 {
172 return 0;
173 }
sched_clear_itmt_support(void)174 static inline void sched_clear_itmt_support(void)
175 {
176 }
177 #endif /* CONFIG_SCHED_MC_PRIO */
178
179 #endif /* _ASM_X86_TOPOLOGY_H */
180
