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 <asm/cputhreads.h>
149 
150 static inline bool topology_is_primary_thread(unsigned int cpu)
151 {
152 	return cpu == cpu_first_thread_sibling(cpu);
153 }
154 
155 static 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 */
163