1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/timex.h>
4 #include <linux/string.h>
5 #include <linux/seq_file.h>
8 * Get CPU information for use by the procfs.
10 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
14 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
15 seq_printf(m, "siblings\t: %d\n",
16 cpumask_weight(topology_core_cpumask(cpu)));
17 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
18 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
19 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
20 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
25 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
32 "fpu_exception\t: %s\n"
35 static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
36 static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
37 static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
38 static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
39 static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
43 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
47 "fpu_exception\t: yes\n"
54 static int show_cpuinfo(struct seq_file *m, void *v)
56 struct cpuinfo_x86 *c = v;
61 seq_printf(m, "processor\t: %u\n"
67 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
70 c->x86_model_id[0] ? c->x86_model_id : "unknown");
72 if (c->x86_mask || c->cpuid_level >= 0)
73 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
75 seq_puts(m, "stepping\t: unknown\n");
77 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
79 if (cpu_has(c, X86_FEATURE_TSC))
80 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
81 cpu_khz / 1000, (cpu_khz % 1000));
84 if (c->x86_cache_size >= 0)
85 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
87 show_cpuinfo_core(m, c, cpu);
88 show_cpuinfo_misc(m, c);
90 seq_puts(m, "flags\t\t:");
91 for (i = 0; i < 32*NCAPINTS; i++)
92 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
93 seq_printf(m, " %s", x86_cap_flags[i]);
95 seq_puts(m, "\nbugs\t\t:");
96 for (i = 0; i < 32*NBUGINTS; i++) {
97 unsigned int bug_bit = 32*NCAPINTS + i;
99 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
100 seq_printf(m, " %s", x86_bug_flags[i]);
103 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
104 c->loops_per_jiffy/(500000/HZ),
105 (c->loops_per_jiffy/(5000/HZ)) % 100);
108 if (c->x86_tlbsize > 0)
109 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
111 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
112 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
113 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
114 c->x86_phys_bits, c->x86_virt_bits);
116 seq_puts(m, "power management:");
117 for (i = 0; i < 32; i++) {
118 if (c->x86_power & (1 << i)) {
119 if (i < ARRAY_SIZE(x86_power_flags) &&
121 seq_printf(m, "%s%s",
122 x86_power_flags[i][0] ? " " : "",
125 seq_printf(m, " [%d]", i);
134 static void *c_start(struct seq_file *m, loff_t *pos)
136 *pos = cpumask_next(*pos - 1, cpu_online_mask);
137 if ((*pos) < nr_cpu_ids)
138 return &cpu_data(*pos);
142 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
145 return c_start(m, pos);
148 static void c_stop(struct seq_file *m, void *v)
152 const struct seq_operations cpuinfo_op = {
156 .show = show_cpuinfo,