1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_TOPOLOGY_H
3 #define _ASM_POWERPC_TOPOLOGY_H
4 #ifdef __KERNEL__
5
6
7 struct device;
8 struct device_node;
9 struct 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
25 struct pci_bus;
26 #ifdef CONFIG_PCI
27 extern int pcibus_to_node(struct pci_bus *bus);
28 #else
29 static 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
39 int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
40 extern int __node_distance(int, int);
41 #define node_distance(a, b) __node_distance(a, b)
42
43 extern void __init dump_numa_cpu_topology(void);
44
45 extern int sysfs_add_device_to_node(struct device *dev, int nid);
46 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
47
48 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
49 {
50 numa_cpu_lookup_table[cpu] = node;
51 }
52
53 static 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
66 int of_drconf_to_nid_single(struct drmem_lmb *lmb);
67 void update_numa_distance(struct device_node *node);
68
69 extern void map_cpu_to_node(int cpu, int node);
70 #ifdef CONFIG_HOTPLUG_CPU
71 extern void unmap_cpu_from_node(unsigned long cpu);
72 #endif /* CONFIG_HOTPLUG_CPU */
73
74 #else
75
76 static inline int early_cpu_to_node(int cpu) { return 0; }
77
78 static inline void dump_numa_cpu_topology(void) {}
79
80 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
81 {
82 return 0;
83 }
84
85 static inline void sysfs_remove_device_from_node(struct device *dev,
86 int nid)
87 {
88 }
89
90 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
91
92 static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
93 {
94 return 0;
95 }
96
97 static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
98 {
99 return first_online_node;
100 }
101
102 static inline void update_numa_distance(struct device_node *node) {}
103
104 #ifdef CONFIG_SMP
105 static inline void map_cpu_to_node(int cpu, int node) {}
106 #ifdef CONFIG_HOTPLUG_CPU
107 static 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)
114 void find_and_update_cpu_nid(int cpu);
115 extern int cpu_to_coregroup_id(int cpu);
116 #else
117 static inline void find_and_update_cpu_nid(int cpu) {}
118 static 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
151 static inline bool topology_is_primary_thread(unsigned int cpu)
152 {
153 return cpu == cpu_first_thread_sibling(cpu);
154 }
155
156 static 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
162 static 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 */
176
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.