1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/debugfs.h>
4
5#include <asm/apic.h>
6#include <asm/processor.h>
7
8#include "cpu.h"
9
10static int cpu_debug_show(struct seq_file *m, void *p)
11{
12 unsigned long cpu = (unsigned long)m->private;
13 struct cpuinfo_x86 *c = per_cpu_ptr(&cpu_info, cpu);
14
15 seq_printf(m, fmt: "online: %d\n", cpu_online(cpu));
16 if (!c->initialized)
17 return 0;
18
19 seq_printf(m, fmt: "initial_apicid: 0x%x\n", c->topo.initial_apicid);
20 seq_printf(m, fmt: "apicid: 0x%x\n", c->topo.apicid);
21 seq_printf(m, fmt: "pkg_id: %u\n", c->topo.pkg_id);
22 seq_printf(m, fmt: "die_id: %u\n", c->topo.die_id);
23 seq_printf(m, fmt: "cu_id: %u\n", c->topo.cu_id);
24 seq_printf(m, fmt: "core_id: %u\n", c->topo.core_id);
25 seq_printf(m, fmt: "cpu_type: %s\n", get_topology_cpu_type_name(c));
26 seq_printf(m, fmt: "logical_pkg_id: %u\n", c->topo.logical_pkg_id);
27 seq_printf(m, fmt: "logical_die_id: %u\n", c->topo.logical_die_id);
28 seq_printf(m, fmt: "logical_core_id: %u\n", c->topo.logical_core_id);
29 seq_printf(m, fmt: "llc_id: %u\n", c->topo.llc_id);
30 seq_printf(m, fmt: "l2c_id: %u\n", c->topo.l2c_id);
31 seq_printf(m, fmt: "amd_node_id: %u\n", c->topo.amd_node_id);
32 seq_printf(m, fmt: "amd_nodes_per_pkg: %u\n", topology_amd_nodes_per_pkg());
33 seq_printf(m, fmt: "num_threads: %u\n", __num_threads_per_package);
34 seq_printf(m, fmt: "num_cores: %u\n", __num_cores_per_package);
35 seq_printf(m, fmt: "max_dies_per_pkg: %u\n", __max_dies_per_package);
36 seq_printf(m, fmt: "max_threads_per_core:%u\n", __max_threads_per_core);
37 return 0;
38}
39
40static int cpu_debug_open(struct inode *inode, struct file *file)
41{
42 return single_open(file, cpu_debug_show, inode->i_private);
43}
44
45static const struct file_operations dfs_cpu_ops = {
46 .open = cpu_debug_open,
47 .read = seq_read,
48 .llseek = seq_lseek,
49 .release = single_release,
50};
51
52static int dom_debug_show(struct seq_file *m, void *p)
53{
54 static const char *domain_names[TOPO_MAX_DOMAIN] = {
55 [TOPO_SMT_DOMAIN] = "Thread",
56 [TOPO_CORE_DOMAIN] = "Core",
57 [TOPO_MODULE_DOMAIN] = "Module",
58 [TOPO_TILE_DOMAIN] = "Tile",
59 [TOPO_DIE_DOMAIN] = "Die",
60 [TOPO_DIEGRP_DOMAIN] = "DieGrp",
61 [TOPO_PKG_DOMAIN] = "Package",
62 };
63 unsigned int dom, nthreads = 1;
64
65 for (dom = 0; dom < TOPO_MAX_DOMAIN; dom++) {
66 nthreads *= x86_topo_system.dom_size[dom];
67 seq_printf(m, fmt: "domain: %-10s shift: %u dom_size: %5u max_threads: %5u\n",
68 domain_names[dom], x86_topo_system.dom_shifts[dom],
69 x86_topo_system.dom_size[dom], nthreads);
70 }
71 return 0;
72}
73
74static int dom_debug_open(struct inode *inode, struct file *file)
75{
76 return single_open(file, dom_debug_show, inode->i_private);
77}
78
79static const struct file_operations dfs_dom_ops = {
80 .open = dom_debug_open,
81 .read = seq_read,
82 .llseek = seq_lseek,
83 .release = single_release,
84};
85
86static __init int cpu_init_debugfs(void)
87{
88 struct dentry *dir, *base = debugfs_create_dir(name: "topo", parent: arch_debugfs_dir);
89 unsigned long id;
90 char name[24];
91
92 debugfs_create_file("domains", 0444, base, NULL, &dfs_dom_ops);
93
94 dir = debugfs_create_dir(name: "cpus", parent: base);
95 for_each_possible_cpu(id) {
96 sprintf(buf: name, fmt: "%lu", id);
97 debugfs_create_file(name, 0444, dir, (void *)id, &dfs_cpu_ops);
98 }
99 return 0;
100}
101late_initcall(cpu_init_debugfs);
102