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