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Diffstat (limited to 'arch/powerpc/include/asm/topology.h')
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h new file mode 100644 index 000000000..f4e6f2dd0 --- /dev/null +++ b/arch/powerpc/include/asm/topology.h @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_TOPOLOGY_H +#define _ASM_POWERPC_TOPOLOGY_H +#ifdef __KERNEL__ + + +struct device; +struct device_node; +struct drmem_lmb; + +#ifdef CONFIG_NUMA + +/* + * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that + * all zones on all nodes will be eligible for zone_reclaim(). + */ +#define RECLAIM_DISTANCE 10 + +#include <asm/mmzone.h> + +#define cpumask_of_node(node) ((node) == -1 ? \ + cpu_all_mask : \ + node_to_cpumask_map[node]) + +struct pci_bus; +#ifdef CONFIG_PCI +extern int pcibus_to_node(struct pci_bus *bus); +#else +static inline int pcibus_to_node(struct pci_bus *bus) +{ + return -1; +} +#endif + +#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \ + cpu_all_mask : \ + cpumask_of_node(pcibus_to_node(bus))) + +int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc); +extern int __node_distance(int, int); +#define node_distance(a, b) __node_distance(a, b) + +extern void __init dump_numa_cpu_topology(void); + +extern int sysfs_add_device_to_node(struct device *dev, int nid); +extern void sysfs_remove_device_from_node(struct device *dev, int nid); + +static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) +{ + numa_cpu_lookup_table[cpu] = node; +} + +static inline int early_cpu_to_node(int cpu) +{ + int nid; + + nid = numa_cpu_lookup_table[cpu]; + + /* + * Fall back to node 0 if nid is unset (it should be, except bugs). + * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)). + */ + return (nid < 0) ? 0 : nid; +} + +int of_drconf_to_nid_single(struct drmem_lmb *lmb); +void update_numa_distance(struct device_node *node); + +extern void map_cpu_to_node(int cpu, int node); +#ifdef CONFIG_HOTPLUG_CPU +extern void unmap_cpu_from_node(unsigned long cpu); +#endif /* CONFIG_HOTPLUG_CPU */ + +#else + +static inline int early_cpu_to_node(int cpu) { return 0; } + +static inline void dump_numa_cpu_topology(void) {} + +static inline int sysfs_add_device_to_node(struct device *dev, int nid) +{ + return 0; +} + +static inline void sysfs_remove_device_from_node(struct device *dev, + int nid) +{ +} + +static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {} + +static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) +{ + return 0; +} + +static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb) +{ + return first_online_node; +} + +static inline void update_numa_distance(struct device_node *node) {} + +#ifdef CONFIG_SMP +static inline void map_cpu_to_node(int cpu, int node) {} +#ifdef CONFIG_HOTPLUG_CPU +static inline void unmap_cpu_from_node(unsigned long cpu) {} +#endif /* CONFIG_HOTPLUG_CPU */ +#endif /* CONFIG_SMP */ + +#endif /* CONFIG_NUMA */ + +#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) +void find_and_update_cpu_nid(int cpu); +extern int cpu_to_coregroup_id(int cpu); +#else +static inline void find_and_update_cpu_nid(int cpu) {} +static inline int cpu_to_coregroup_id(int cpu) +{ +#ifdef CONFIG_SMP + return cpu_to_core_id(cpu); +#else + return 0; +#endif +} + +#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */ + +#include <asm-generic/topology.h> + +#ifdef CONFIG_SMP +#include <asm/cputable.h> + +#ifdef CONFIG_PPC64 +#include <asm/smp.h> + +#define topology_physical_package_id(cpu) (cpu_to_chip_id(cpu)) + +#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) +#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) +#define topology_core_id(cpu) (cpu_to_core_id(cpu)) + +#endif +#endif + +#ifdef CONFIG_HOTPLUG_SMT +#include <linux/cpu_smt.h> +#include <asm/cputhreads.h> + +static inline bool topology_is_primary_thread(unsigned int cpu) +{ + return cpu == cpu_first_thread_sibling(cpu); +} + +static inline bool topology_smt_thread_allowed(unsigned int cpu) +{ + return cpu_thread_in_core(cpu) < cpu_smt_num_threads; +} +#endif + +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_TOPOLOGY_H */ |