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