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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 */ | |
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 | /* | |
79 | * Returns the number of the node containing Node 'node'. This | |
80 | * architecture is flat, so it is a pretty simple function! | |
81 | */ | |
82 | #define parent_node(node) (node) | |
83 | ||
84 | #define pcibus_to_node(bus) __pcibus_to_node(bus) | |
85 | ||
86 | extern int __node_distance(int, int); | |
87 | #define node_distance(a, b) __node_distance(a, b) | |
88 | ||
89 | #else /* !CONFIG_NUMA */ | |
90 | ||
91 | static inline int numa_node_id(void) | |
92 | { | |
93 | return 0; | |
94 | } | |
95 | /* | |
96 | * indicate override: | |
97 | */ | |
98 | #define numa_node_id numa_node_id | |
99 | ||
100 | static inline int early_cpu_to_node(int cpu) | |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static inline void setup_node_to_cpumask_map(void) { } | |
106 | ||
107 | #endif | |
108 | ||
109 | #include <asm-generic/topology.h> | |
110 | ||
111 | extern const struct cpumask *cpu_coregroup_mask(int cpu); | |
112 | ||
113 | #define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id) | |
114 | #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) | |
115 | #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) | |
116 | ||
117 | #ifdef CONFIG_SMP | |
118 | #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) | |
119 | #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) | |
120 | ||
121 | extern unsigned int __max_logical_packages; | |
122 | #define topology_max_packages() (__max_logical_packages) | |
123 | ||
124 | extern int __max_smt_threads; | |
125 | ||
126 | static inline int topology_max_smt_threads(void) | |
127 | { | |
128 | return __max_smt_threads; | |
129 | } | |
130 | ||
131 | int topology_update_package_map(unsigned int apicid, unsigned int cpu); | |
132 | extern int topology_phys_to_logical_pkg(unsigned int pkg); | |
133 | #else | |
134 | #define topology_max_packages() (1) | |
135 | static inline int | |
136 | topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; } | |
137 | static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; } | |
138 | static inline int topology_max_smt_threads(void) { return 1; } | |
139 | #endif | |
140 | ||
141 | static inline void arch_fix_phys_package_id(int num, u32 slot) | |
142 | { | |
143 | } | |
144 | ||
145 | struct pci_bus; | |
146 | int x86_pci_root_bus_node(int bus); | |
147 | void x86_pci_root_bus_resources(int bus, struct list_head *resources); | |
148 | ||
149 | extern bool x86_topology_update; | |
150 | ||
151 | #ifdef CONFIG_SCHED_MC_PRIO | |
152 | #include <asm/percpu.h> | |
153 | ||
154 | DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority); | |
155 | extern unsigned int __read_mostly sysctl_sched_itmt_enabled; | |
156 | ||
157 | /* Interface to set priority of a cpu */ | |
158 | void sched_set_itmt_core_prio(int prio, int core_cpu); | |
159 | ||
160 | /* Interface to notify scheduler that system supports ITMT */ | |
161 | int sched_set_itmt_support(void); | |
162 | ||
163 | /* Interface to notify scheduler that system revokes ITMT support */ | |
164 | void sched_clear_itmt_support(void); | |
165 | ||
166 | #else /* CONFIG_SCHED_MC_PRIO */ | |
167 | ||
168 | #define sysctl_sched_itmt_enabled 0 | |
169 | static inline void sched_set_itmt_core_prio(int prio, int core_cpu) | |
170 | { | |
171 | } | |
172 | static inline int sched_set_itmt_support(void) | |
173 | { | |
174 | return 0; | |
175 | } | |
176 | static inline void sched_clear_itmt_support(void) | |
177 | { | |
178 | } | |
179 | #endif /* CONFIG_SCHED_MC_PRIO */ | |
180 | ||
181 | #endif /* _ASM_X86_TOPOLOGY_H */ |