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
134struct cpumask *cpu_coregroup_mask(int cpu);
135const struct cpumask *cpu_die_mask(int cpu);
136int cpu_die_id(int cpu);
137
138#ifdef CONFIG_PPC64
139#include <asm/smp.h>
140
141#define topology_physical_package_id(cpu)	(cpu_to_chip_id(cpu))
142#define topology_sibling_cpumask(cpu)		(per_cpu(cpu_sibling_map, cpu))
143#define topology_core_cpumask(cpu)		(per_cpu(cpu_core_map, cpu))
144#define topology_core_id(cpu)			(cpu_to_core_id(cpu))
145#define topology_die_id(cpu)			(cpu_die_id(cpu))
146#define topology_die_cpumask(cpu)		(cpu_die_mask(cpu))
147
148#endif
149#endif
150
151#ifdef CONFIG_HOTPLUG_SMT
152#include <linux/cpu_smt.h>
153#include <linux/cpumask.h>
154#include <asm/cputhreads.h>
155
156static inline bool topology_is_primary_thread(unsigned int cpu)
157{
158	return cpu == cpu_first_thread_sibling(cpu);
159}
160#define topology_is_primary_thread topology_is_primary_thread
161
162static inline bool topology_smt_thread_allowed(unsigned int cpu)
163{
164	return cpu_thread_in_core(cpu) < cpu_smt_num_threads;
165}
166
167#define topology_is_core_online topology_is_core_online
168static inline bool topology_is_core_online(unsigned int cpu)
169{
170	int i, first_cpu = cpu_first_thread_sibling(cpu);
171
172	for (i = first_cpu; i < first_cpu + threads_per_core; ++i) {
173		if (cpu_online(i))
174			return true;
175	}
176	return false;
177}
178#endif
179
180#endif /* __KERNEL__ */
181#endif	/* _ASM_POWERPC_TOPOLOGY_H */