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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_TOPOLOGY_H
3#define _ASM_POWERPC_TOPOLOGY_H
4#ifdef __KERNEL__
5
6
7struct device;
8struct device_node;
9struct drmem_lmb;
10
11#ifdef CONFIG_NUMA
12
13/*
14 * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
15 * all zones on all nodes will be eligible for zone_reclaim().
16 */
17#define RECLAIM_DISTANCE 10
18
19#include <asm/mmzone.h>
20
21#define cpumask_of_node(node) ((node) == -1 ? \
22 cpu_all_mask : \
23 node_to_cpumask_map[node])
24
25struct pci_bus;
26#ifdef CONFIG_PCI
27extern int pcibus_to_node(struct pci_bus *bus);
28#else
29static inline int pcibus_to_node(struct pci_bus *bus)
30{
31 return -1;
32}
33#endif
34
35#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
36 cpu_all_mask : \
37 cpumask_of_node(pcibus_to_node(bus)))
38
39int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
40extern int __node_distance(int, int);
41#define node_distance(a, b) __node_distance(a, b)
42
43extern void __init dump_numa_cpu_topology(void);
44
45extern int sysfs_add_device_to_node(struct device *dev, int nid);
46extern void sysfs_remove_device_from_node(struct device *dev, int nid);
47
48static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
49{
50 numa_cpu_lookup_table[cpu] = node;
51}
52
53static inline int early_cpu_to_node(int cpu)
54{
55 int nid;
56
57 nid = numa_cpu_lookup_table[cpu];
58
59 /*
60 * Fall back to node 0 if nid is unset (it should be, except bugs).
61 * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
62 */
63 return (nid < 0) ? 0 : nid;
64}
65
66int of_drconf_to_nid_single(struct drmem_lmb *lmb);
67void update_numa_distance(struct device_node *node);
68
69extern void map_cpu_to_node(int cpu, int node);
70#ifdef CONFIG_HOTPLUG_CPU
71extern void unmap_cpu_from_node(unsigned long cpu);
72#endif /* CONFIG_HOTPLUG_CPU */
73
74#else
75
76static inline int early_cpu_to_node(int cpu) { return 0; }
77
78static inline void dump_numa_cpu_topology(void) {}
79
80static inline int sysfs_add_device_to_node(struct device *dev, int nid)
81{
82 return 0;
83}
84
85static inline void sysfs_remove_device_from_node(struct device *dev,
86 int nid)
87{
88}
89
90static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
91
92static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
93{
94 return 0;
95}
96
97static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
98{
99 return first_online_node;
100}
101
102static inline void update_numa_distance(struct device_node *node) {}
103
104#ifdef CONFIG_SMP
105static inline void map_cpu_to_node(int cpu, int node) {}
106#ifdef CONFIG_HOTPLUG_CPU
107static inline void unmap_cpu_from_node(unsigned long cpu) {}
108#endif /* CONFIG_HOTPLUG_CPU */
109#endif /* CONFIG_SMP */
110
111#endif /* CONFIG_NUMA */
112
113#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
114void find_and_update_cpu_nid(int cpu);
115extern int cpu_to_coregroup_id(int cpu);
116#else
117static inline void find_and_update_cpu_nid(int cpu) {}
118static inline int cpu_to_coregroup_id(int cpu)
119{
120#ifdef CONFIG_SMP
121 return cpu_to_core_id(cpu);
122#else
123 return 0;
124#endif
125}
126
127#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
128
129#include <asm-generic/topology.h>
130
131#ifdef CONFIG_SMP
132#include <asm/cputable.h>
133
134#ifdef CONFIG_PPC64
135#include <asm/smp.h>
136
137#define topology_physical_package_id(cpu) (cpu_to_chip_id(cpu))
138
139#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
140#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
141#define topology_core_id(cpu) (cpu_to_core_id(cpu))
142
143#endif
144#endif
145
146#ifdef CONFIG_HOTPLUG_SMT
147#include <linux/cpu_smt.h>
148#include <asm/cputhreads.h>
149
150static inline bool topology_is_primary_thread(unsigned int cpu)
151{
152 return cpu == cpu_first_thread_sibling(cpu);
153}
154
155static inline bool topology_smt_thread_allowed(unsigned int cpu)
156{
157 return cpu_thread_in_core(cpu) < cpu_smt_num_threads;
158}
159#endif
160
161#endif /* __KERNEL__ */
162#endif /* _ASM_POWERPC_TOPOLOGY_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_TOPOLOGY_H
3#define _ASM_POWERPC_TOPOLOGY_H
4#ifdef __KERNEL__
5
6
7struct device;
8struct device_node;
9struct drmem_lmb;
10
11#ifdef CONFIG_NUMA
12
13/*
14 * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
15 * all zones on all nodes will be eligible for zone_reclaim().
16 */
17#define RECLAIM_DISTANCE 10
18
19#include <asm/mmzone.h>
20
21#define cpumask_of_node(node) ((node) == -1 ? \
22 cpu_all_mask : \
23 node_to_cpumask_map[node])
24
25struct pci_bus;
26#ifdef CONFIG_PCI
27extern int pcibus_to_node(struct pci_bus *bus);
28#else
29static inline int pcibus_to_node(struct pci_bus *bus)
30{
31 return -1;
32}
33#endif
34
35#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
36 cpu_all_mask : \
37 cpumask_of_node(pcibus_to_node(bus)))
38
39int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
40extern int __node_distance(int, int);
41#define node_distance(a, b) __node_distance(a, b)
42
43extern void __init dump_numa_cpu_topology(void);
44
45extern int sysfs_add_device_to_node(struct device *dev, int nid);
46extern void sysfs_remove_device_from_node(struct device *dev, int nid);
47
48static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
49{
50 numa_cpu_lookup_table[cpu] = node;
51}
52
53static inline int early_cpu_to_node(int cpu)
54{
55 int nid;
56
57 nid = numa_cpu_lookup_table[cpu];
58
59 /*
60 * Fall back to node 0 if nid is unset (it should be, except bugs).
61 * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
62 */
63 return (nid < 0) ? 0 : nid;
64}
65
66int of_drconf_to_nid_single(struct drmem_lmb *lmb);
67void update_numa_distance(struct device_node *node);
68
69extern void map_cpu_to_node(int cpu, int node);
70#ifdef CONFIG_HOTPLUG_CPU
71extern void unmap_cpu_from_node(unsigned long cpu);
72#endif /* CONFIG_HOTPLUG_CPU */
73
74#else
75
76static inline int early_cpu_to_node(int cpu) { return 0; }
77
78static inline void dump_numa_cpu_topology(void) {}
79
80static inline int sysfs_add_device_to_node(struct device *dev, int nid)
81{
82 return 0;
83}
84
85static inline void sysfs_remove_device_from_node(struct device *dev,
86 int nid)
87{
88}
89
90static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
91
92static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
93{
94 return 0;
95}
96
97static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
98{
99 return first_online_node;
100}
101
102static inline void update_numa_distance(struct device_node *node) {}
103
104#ifdef CONFIG_SMP
105static inline void map_cpu_to_node(int cpu, int node) {}
106#ifdef CONFIG_HOTPLUG_CPU
107static inline void unmap_cpu_from_node(unsigned long cpu) {}
108#endif /* CONFIG_HOTPLUG_CPU */
109#endif /* CONFIG_SMP */
110
111#endif /* CONFIG_NUMA */
112
113#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
114void find_and_update_cpu_nid(int cpu);
115extern int cpu_to_coregroup_id(int cpu);
116#else
117static inline void find_and_update_cpu_nid(int cpu) {}
118static inline int cpu_to_coregroup_id(int cpu)
119{
120#ifdef CONFIG_SMP
121 return cpu_to_core_id(cpu);
122#else
123 return 0;
124#endif
125}
126
127#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
128
129#include <asm-generic/topology.h>
130
131#ifdef CONFIG_SMP
132#include <asm/cputable.h>
133
134#ifdef CONFIG_PPC64
135#include <asm/smp.h>
136
137#define topology_physical_package_id(cpu) (cpu_to_chip_id(cpu))
138
139#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
140#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
141#define topology_core_id(cpu) (cpu_to_core_id(cpu))
142
143#endif
144#endif
145
146#ifdef CONFIG_HOTPLUG_SMT
147#include <linux/cpu_smt.h>
148#include <linux/cpumask.h>
149#include <asm/cputhreads.h>
150
151static inline bool topology_is_primary_thread(unsigned int cpu)
152{
153 return cpu == cpu_first_thread_sibling(cpu);
154}
155
156static inline bool topology_smt_thread_allowed(unsigned int cpu)
157{
158 return cpu_thread_in_core(cpu) < cpu_smt_num_threads;
159}
160
161#define topology_is_core_online topology_is_core_online
162static inline bool topology_is_core_online(unsigned int cpu)
163{
164 int i, first_cpu = cpu_first_thread_sibling(cpu);
165
166 for (i = first_cpu; i < first_cpu + threads_per_core; ++i) {
167 if (cpu_online(i))
168 return true;
169 }
170 return false;
171}
172#endif
173
174#endif /* __KERNEL__ */
175#endif /* _ASM_POWERPC_TOPOLOGY_H */