2 #include <linux/timex.h>
3 #include <linux/string.h>
4 #include <asm/semaphore.h>
5 #include <linux/seq_file.h>
6 #include <linux/cpufreq.h>
9 * Get CPU information for use by the procfs.
11 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
15 if (c->x86_max_cores * smp_num_siblings > 1) {
16 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
17 seq_printf(m, "siblings\t: %d\n",
18 cpus_weight(per_cpu(cpu_core_map, cpu)));
19 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
20 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
25 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
28 * We use exception 16 if we have hardware math and we've either seen
29 * it or the CPU claims it is internal
31 int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
38 "fpu_exception\t: %s\n"
41 c->fdiv_bug ? "yes" : "no",
42 c->hlt_works_ok ? "no" : "yes",
43 c->f00f_bug ? "yes" : "no",
44 c->coma_bug ? "yes" : "no",
45 c->hard_math ? "yes" : "no",
46 fpu_exception ? "yes" : "no",
48 c->wp_works_ok ? "yes" : "no");
51 static int show_cpuinfo(struct seq_file *m, void *v)
53 struct cpuinfo_x86 *c = v;
60 seq_printf(m, "processor\t: %u\n"
66 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
69 c->x86_model_id[0] ? c->x86_model_id : "unknown");
71 if (c->x86_mask || c->cpuid_level >= 0)
72 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
74 seq_printf(m, "stepping\t: unknown\n");
76 if (cpu_has(c, X86_FEATURE_TSC)) {
77 unsigned int freq = cpufreq_quick_get(cpu);
81 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
82 freq / 1000, (freq % 1000));
86 if (c->x86_cache_size >= 0)
87 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
89 show_cpuinfo_core(m, c, cpu);
90 show_cpuinfo_misc(m, c);
92 seq_printf(m, "flags\t\t:");
93 for (i = 0; i < 32*NCAPINTS; i++)
94 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
95 seq_printf(m, " %s", x86_cap_flags[i]);
97 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
98 c->loops_per_jiffy/(500000/HZ),
99 (c->loops_per_jiffy/(5000/HZ)) % 100);
100 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
102 seq_printf(m, "power management:");
103 for (i = 0; i < 32; i++) {
104 if (c->x86_power & (1 << i)) {
105 if (i < ARRAY_SIZE(x86_power_flags) &&
107 seq_printf(m, "%s%s",
108 x86_power_flags[i][0]?" ":"",
111 seq_printf(m, " [%d]", i);
115 seq_printf(m, "\n\n");
120 static void *c_start(struct seq_file *m, loff_t *pos)
122 if (*pos == 0) /* just in case, cpu 0 is not the first */
123 *pos = first_cpu(cpu_online_map);
124 if ((*pos) < NR_CPUS && cpu_online(*pos))
125 return &cpu_data(*pos);
129 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
131 *pos = next_cpu(*pos, cpu_online_map);
132 return c_start(m, pos);
135 static void c_stop(struct seq_file *m, void *v)
139 const struct seq_operations cpuinfo_op = {
143 .show = show_cpuinfo,