| // SPDX-License-Identifier: GPL-2.0 |
| |
| #include <linux/debugfs.h> |
| |
| #include <asm/apic.h> |
| #include <asm/processor.h> |
| |
| static int cpu_debug_show(struct seq_file *m, void *p) |
| { |
| unsigned long cpu = (unsigned long)m->private; |
| struct cpuinfo_x86 *c = per_cpu_ptr(&cpu_info, cpu); |
| |
| seq_printf(m, "online: %d\n", cpu_online(cpu)); |
| if (!c->initialized) |
| return 0; |
| |
| seq_printf(m, "initial_apicid: %x\n", c->topo.initial_apicid); |
| seq_printf(m, "apicid: %x\n", c->topo.apicid); |
| seq_printf(m, "pkg_id: %u\n", c->topo.pkg_id); |
| seq_printf(m, "die_id: %u\n", c->topo.die_id); |
| seq_printf(m, "cu_id: %u\n", c->topo.cu_id); |
| seq_printf(m, "core_id: %u\n", c->topo.core_id); |
| seq_printf(m, "logical_pkg_id: %u\n", c->topo.logical_pkg_id); |
| seq_printf(m, "logical_die_id: %u\n", c->topo.logical_die_id); |
| seq_printf(m, "llc_id: %u\n", c->topo.llc_id); |
| seq_printf(m, "l2c_id: %u\n", c->topo.l2c_id); |
| seq_printf(m, "max_cores: %u\n", c->x86_max_cores); |
| seq_printf(m, "max_die_per_pkg: %u\n", __max_die_per_package); |
| seq_printf(m, "smp_num_siblings: %u\n", smp_num_siblings); |
| return 0; |
| } |
| |
| static int cpu_debug_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, cpu_debug_show, inode->i_private); |
| } |
| |
| static const struct file_operations dfs_cpu_ops = { |
| .open = cpu_debug_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static __init int cpu_init_debugfs(void) |
| { |
| struct dentry *dir, *base = debugfs_create_dir("topo", arch_debugfs_dir); |
| unsigned long id; |
| char name[24]; |
| |
| dir = debugfs_create_dir("cpus", base); |
| for_each_possible_cpu(id) { |
| sprintf(name, "%lu", id); |
| debugfs_create_file(name, 0444, dir, (void *)id, &dfs_cpu_ops); |
| } |
| return 0; |
| } |
| late_initcall(cpu_init_debugfs); |