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