1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PERF_CPUTOPO_H
3 #define __PERF_CPUTOPO_H
4
5 #include <linux/types.h>
6
7 struct cpu_topology {
8 /* The number of unique package_cpus_lists below. */
9 u32 package_cpus_lists;
10 /* The number of unique die_cpu_lists below. */
11 u32 die_cpus_lists;
12 /* The number of unique core_cpu_lists below. */
13 u32 core_cpus_lists;
14 /*
15 * An array of strings where each string is unique and read from
16 * /sys/devices/system/cpu/cpuX/topology/package_cpus_list. From the ABI
17 * each of these is a human-readable list of CPUs sharing the same
18 * physical_package_id. The format is like 0-3, 8-11, 14,17.
19 */
20 const char **package_cpus_list;
21 /*
22 * An array of string where each string is unique and from
23 * /sys/devices/system/cpu/cpuX/topology/die_cpus_list. From the ABI
24 * each of these is a human-readable list of CPUs within the same die.
25 * The format is like 0-3, 8-11, 14,17.
26 */
27 const char **die_cpus_list;
28 /*
29 * An array of string where each string is unique and from
30 * /sys/devices/system/cpu/cpuX/topology/core_cpus_list. From the ABI
31 * each of these is a human-readable list of CPUs within the same
32 * core. The format is like 0-3, 8-11, 14,17.
33 */
34 const char **core_cpus_list;
35 };
36
37 struct numa_topology_node {
38 char *cpus;
39 u32 node;
40 u64 mem_total;
41 u64 mem_free;
42 };
43
44 struct numa_topology {
45 u32 nr;
46 struct numa_topology_node nodes[];
47 };
48
49 struct hybrid_topology_node {
50 char *pmu_name;
51 char *cpus;
52 };
53
54 struct hybrid_topology {
55 u32 nr;
56 struct hybrid_topology_node nodes[];
57 };
58
59 /*
60 * The topology for online CPUs, lazily created.
61 */
62 const struct cpu_topology *online_topology(void);
63
64 struct cpu_topology *cpu_topology__new(void);
65 void cpu_topology__delete(struct cpu_topology *tp);
66 /* Determine from the core list whether SMT was enabled. */
67 bool cpu_topology__smt_on(const struct cpu_topology *topology);
68 /* Are the sets of SMT siblings all enabled or all disabled in user_requested_cpus. */
69 bool cpu_topology__core_wide(const struct cpu_topology *topology,
70 const char *user_requested_cpu_list);
71
72 struct numa_topology *numa_topology__new(void);
73 void numa_topology__delete(struct numa_topology *tp);
74
75 struct hybrid_topology *hybrid_topology__new(void);
76 void hybrid_topology__delete(struct hybrid_topology *tp);
77
78 #endif /* __PERF_CPUTOPO_H */
79
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