/* * Written by: Matthew Dobson, IBM Corporation * * Copyright (C) 2002, IBM Corp. * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Send feedback to <[email protected]> */ #ifndef _ASM_X86_TOPOLOGY_H #define _ASM_X86_TOPOLOGY_H /* * to preserve the visibility of NUMA_NO_NODE definition, * moved to there from here. May be used independent of * CONFIG_NUMA. */ #include <linux/numa.h> #include <linux/cpumask.h> #ifdef CONFIG_NUMA #include <asm/mpspec.h> #include <asm/percpu.h> /* Mappings between logical cpu number and node number */ DECLARE_EARLY_PER_CPU(…); #ifdef CONFIG_DEBUG_PER_CPU_MAPS /* * override generic percpu implementation of cpu_to_node */ extern int __cpu_to_node(int cpu); #define cpu_to_node … extern int early_cpu_to_node(int cpu); #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ /* Same function but used if called before per_cpu areas are setup */ static inline int early_cpu_to_node(int cpu) { return early_per_cpu(x86_cpu_to_node_map, cpu); } #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ /* Mappings between node number and cpus on that node. */ extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; #ifdef CONFIG_DEBUG_PER_CPU_MAPS extern const struct cpumask *cpumask_of_node(int node); #else /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ static inline const struct cpumask *cpumask_of_node(int node) { return node_to_cpumask_map[node]; } #endif extern void setup_node_to_cpumask_map(void); #define pcibus_to_node(bus) … extern int __node_distance(int, int); #define node_distance(a, b) … #else /* !CONFIG_NUMA */ static inline int numa_node_id(void) { return 0; } /* * indicate override: */ #define numa_node_id … static inline int early_cpu_to_node(int cpu) { return 0; } static inline void setup_node_to_cpumask_map(void) { } #endif #include <asm-generic/topology.h> /* Topology information */ enum x86_topology_domains { … }; struct x86_topology_system { … }; extern struct x86_topology_system x86_topo_system; static inline unsigned int topology_get_domain_size(enum x86_topology_domains dom) { … } static inline unsigned int topology_get_domain_shift(enum x86_topology_domains dom) { … } extern const struct cpumask *cpu_coregroup_mask(int cpu); extern const struct cpumask *cpu_clustergroup_mask(int cpu); #define topology_logical_package_id(cpu) … #define topology_physical_package_id(cpu) … #define topology_logical_die_id(cpu) … #define topology_die_id(cpu) … #define topology_core_id(cpu) … #define topology_ppin(cpu) … #define topology_amd_node_id(cpu) … extern unsigned int __max_dies_per_package; extern unsigned int __max_logical_packages; extern unsigned int __max_threads_per_core; extern unsigned int __num_threads_per_package; extern unsigned int __num_cores_per_package; static inline unsigned int topology_max_packages(void) { … } static inline unsigned int topology_max_dies_per_package(void) { … } static inline unsigned int topology_num_cores_per_package(void) { … } static inline unsigned int topology_num_threads_per_package(void) { … } #ifdef CONFIG_X86_LOCAL_APIC int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level); #else static inline int topology_get_logical_id(u32 apicid, enum x86_topology_domains at_level) { return 0; } #endif #ifdef CONFIG_SMP #define topology_cluster_id(cpu) … #define topology_die_cpumask(cpu) … #define topology_cluster_cpumask(cpu) … #define topology_core_cpumask(cpu) … #define topology_sibling_cpumask(cpu) … static inline int topology_phys_to_logical_pkg(unsigned int pkg) { … } extern int __max_smt_threads; static inline int topology_max_smt_threads(void) { … } #include <linux/cpu_smt.h> extern unsigned int __amd_nodes_per_pkg; static inline unsigned int topology_amd_nodes_per_pkg(void) { … } extern struct cpumask __cpu_primary_thread_mask; #define cpu_primary_thread_mask … /** * topology_is_primary_thread - Check whether CPU is the primary SMT thread * @cpu: CPU to check */ static inline bool topology_is_primary_thread(unsigned int cpu) { … } #else /* CONFIG_SMP */ static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; } static inline int topology_max_smt_threads(void) { return 1; } static inline bool topology_is_primary_thread(unsigned int cpu) { return true; } static inline unsigned int topology_amd_nodes_per_pkg(void) { return 1; } #endif /* !CONFIG_SMP */ static inline void arch_fix_phys_package_id(int num, u32 slot) { … } struct pci_bus; int x86_pci_root_bus_node(int bus); void x86_pci_root_bus_resources(int bus, struct list_head *resources); extern bool x86_topology_update; #ifdef CONFIG_SCHED_MC_PRIO #include <asm/percpu.h> DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority); extern unsigned int __read_mostly sysctl_sched_itmt_enabled; /* Interface to set priority of a cpu */ void sched_set_itmt_core_prio(int prio, int core_cpu); /* Interface to notify scheduler that system supports ITMT */ int sched_set_itmt_support(void); /* Interface to notify scheduler that system revokes ITMT support */ void sched_clear_itmt_support(void); #else /* CONFIG_SCHED_MC_PRIO */ #define sysctl_sched_itmt_enabled … static inline void sched_set_itmt_core_prio(int prio, int core_cpu) { } static inline int sched_set_itmt_support(void) { return 0; } static inline void sched_clear_itmt_support(void) { } #endif /* CONFIG_SCHED_MC_PRIO */ #if defined(CONFIG_SMP) && defined(CONFIG_X86_64) #include <asm/cpufeature.h> DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key); #define arch_scale_freq_invariant() … DECLARE_PER_CPU(unsigned long, arch_freq_scale); static inline long arch_scale_freq_capacity(int cpu) { … } #define arch_scale_freq_capacity … extern void arch_set_max_freq_ratio(bool turbo_disabled); extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled); #else static inline void arch_set_max_freq_ratio(bool turbo_disabled) { } static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { } #endif extern void arch_scale_freq_tick(void); #define arch_scale_freq_tick … #ifdef CONFIG_ACPI_CPPC_LIB void init_freq_invariance_cppc(void); #define arch_init_invariance_cppc … #endif #endif /* _ASM_X86_TOPOLOGY_H */
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