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 */
42DECLARE_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 */
48extern int __cpu_to_node(int cpu);
49#define cpu_to_node __cpu_to_node
50
51extern 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 */
56static 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. */
64extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
65
66#ifdef CONFIG_DEBUG_PER_CPU_MAPS
67extern const struct cpumask *cpumask_of_node(int node);
68#else
69/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
70static inline const struct cpumask *cpumask_of_node(int node)
71{
72 return node_to_cpumask_map[node];
73}
74#endif
75
76extern void setup_node_to_cpumask_map(void);
77
78#define pcibus_to_node(bus) __pcibus_to_node(bus)
79
80extern int __node_distance(int, int);
81#define node_distance(a, b) __node_distance(a, b)
82
83#else /* !CONFIG_NUMA */
84
85static 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
94static inline int early_cpu_to_node(int cpu)
95{
96 return 0;
97}
98
99static inline void setup_node_to_cpumask_map(void) { }
100
101#endif
102
103#include <asm-generic/topology.h>
104
105extern 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
115extern unsigned int __max_logical_packages;
116#define topology_max_packages() (__max_logical_packages)
117
118extern int __max_smt_threads;
119
120static inline int topology_max_smt_threads(void)
121{
122 return __max_smt_threads;
123}
124
125int topology_update_package_map(unsigned int apicid, unsigned int cpu);
126int topology_phys_to_logical_pkg(unsigned int pkg);
127bool topology_is_primary_thread(unsigned int cpu);
128bool topology_smt_supported(void);
129#else
130#define topology_max_packages() (1)
131static inline int
132topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
133static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
134static inline int topology_max_smt_threads(void) { return 1; }
135static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
136static inline bool topology_smt_supported(void) { return false; }
137#endif
138
139static inline void arch_fix_phys_package_id(int num, u32 slot)
140{
141}
142
143struct pci_bus;
144int x86_pci_root_bus_node(int bus);
145void x86_pci_root_bus_resources(int bus, struct list_head *resources);
146
147extern bool x86_topology_update;
148
149#ifdef CONFIG_SCHED_MC_PRIO
150#include <asm/percpu.h>
151
152DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
153extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
154
155/* Interface to set priority of a cpu */
156void sched_set_itmt_core_prio(int prio, int core_cpu);
157
158/* Interface to notify scheduler that system supports ITMT */
159int sched_set_itmt_support(void);
160
161/* Interface to notify scheduler that system revokes ITMT support */
162void sched_clear_itmt_support(void);
163
164#else /* CONFIG_SCHED_MC_PRIO */
165
166#define sysctl_sched_itmt_enabled 0
167static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
168{
169}
170static inline int sched_set_itmt_support(void)
171{
172 return 0;
173}
174static inline void sched_clear_itmt_support(void)
175{
176}
177#endif /* CONFIG_SCHED_MC_PRIO */
178
179#endif /* _ASM_X86_TOPOLOGY_H */
180