topology.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _ASM_S390_TOPOLOGY_H
  3#define _ASM_S390_TOPOLOGY_H
  4
  5#include <linux/cpumask.h>
  6#include <asm/numa.h>
  7
  8struct sysinfo_15_1_x;
  9struct cpu;
 10
 11#ifdef CONFIG_SCHED_TOPOLOGY
 12
 13struct cpu_topology_s390 {
 14	unsigned short thread_id;
 15	unsigned short core_id;
 16	unsigned short socket_id;
 17	unsigned short book_id;
 18	unsigned short drawer_id;
 19	unsigned short dedicated : 1;
 20	int booted_cores;
 21	cpumask_t thread_mask;
 22	cpumask_t core_mask;
 23	cpumask_t book_mask;
 24	cpumask_t drawer_mask;
 25};
 26
 27extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
 28
 29#define topology_physical_package_id(cpu) (cpu_topology[cpu].socket_id)
 30#define topology_thread_id(cpu)		  (cpu_topology[cpu].thread_id)
 31#define topology_sibling_cpumask(cpu)	  (&cpu_topology[cpu].thread_mask)
 32#define topology_core_id(cpu)		  (cpu_topology[cpu].core_id)
 33#define topology_core_cpumask(cpu)	  (&cpu_topology[cpu].core_mask)
 34#define topology_book_id(cpu)		  (cpu_topology[cpu].book_id)
 35#define topology_book_cpumask(cpu)	  (&cpu_topology[cpu].book_mask)
 36#define topology_drawer_id(cpu)		  (cpu_topology[cpu].drawer_id)
 37#define topology_drawer_cpumask(cpu)	  (&cpu_topology[cpu].drawer_mask)
 38#define topology_cpu_dedicated(cpu)	  (cpu_topology[cpu].dedicated)
 39#define topology_booted_cores(cpu)	  (cpu_topology[cpu].booted_cores)
 40
 41#define mc_capable() 1
 42
 43void topology_init_early(void);
 44int topology_cpu_init(struct cpu *);
 45int topology_set_cpu_management(int fc);
 46void topology_schedule_update(void);
 47void store_topology(struct sysinfo_15_1_x *info);
 48void update_cpu_masks(void);
 49void topology_expect_change(void);
 50const struct cpumask *cpu_coregroup_mask(int cpu);
 51
 52#else /* CONFIG_SCHED_TOPOLOGY */
 53
 54static inline void topology_init_early(void) { }
 55static inline void topology_schedule_update(void) { }
 56static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
 57static inline int topology_cpu_dedicated(int cpu_nr) { return 0; }
 58static inline int topology_booted_cores(int cpu_nr) { return 1; }
 59static inline void update_cpu_masks(void) { }
 60static inline void topology_expect_change(void) { }
 61
 62#endif /* CONFIG_SCHED_TOPOLOGY */
 63
 64static inline bool topology_is_primary_thread(unsigned int cpu)
 65{
 66	return smp_get_base_cpu(cpu) == cpu;
 67}
 68#define topology_is_primary_thread topology_is_primary_thread
 69
 70#define POLARIZATION_UNKNOWN	(-1)
 71#define POLARIZATION_HRZ	(0)
 72#define POLARIZATION_VL		(1)
 73#define POLARIZATION_VM		(2)
 74#define POLARIZATION_VH		(3)
 75
 76#define CPU_CAPACITY_HIGH	SCHED_CAPACITY_SCALE
 77#define CPU_CAPACITY_LOW	(SCHED_CAPACITY_SCALE >> 3)
 78
 79#define SD_BOOK_INIT	SD_CPU_INIT
 80
 81#ifdef CONFIG_NUMA
 82
 83#define cpu_to_node cpu_to_node
 84static inline int cpu_to_node(int cpu)
 85{
 86	return 0;
 87}
 88
 89/* Returns a pointer to the cpumask of CPUs on node 'node'. */
 90#define cpumask_of_node cpumask_of_node
 91static inline const struct cpumask *cpumask_of_node(int node)
 92{
 93	return cpu_possible_mask;
 94}
 95
 96#define pcibus_to_node(bus) __pcibus_to_node(bus)
 97
 98#else /* !CONFIG_NUMA */
 99
100#define numa_node_id numa_node_id
101static inline int numa_node_id(void)
102{
103	return 0;
104}
105
106#endif /* CONFIG_NUMA */
107
108#include <asm-generic/topology.h>
109
110#endif /* _ASM_S390_TOPOLOGY_H */