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.
12 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
16 if (c->x86_max_cores * smp_num_siblings > 1) {
17 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
18 seq_printf(m, "siblings\t: %d\n",
19 cpus_weight(per_cpu(cpu_core_map, cpu)));
20 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
21 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
26 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
29 * We use exception 16 if we have hardware math and we've either seen
30 * it or the CPU claims it is internal
32 int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
39 "fpu_exception\t: %s\n"
42 c->fdiv_bug ? "yes" : "no",
43 c->hlt_works_ok ? "no" : "yes",
44 c->f00f_bug ? "yes" : "no",
45 c->coma_bug ? "yes" : "no",
46 c->hard_math ? "yes" : "no",
47 fpu_exception ? "yes" : "no",
49 c->wp_works_ok ? "yes" : "no");
52 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
56 if (c->x86_max_cores * smp_num_siblings > 1) {
57 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
58 seq_printf(m, "siblings\t: %d\n",
59 cpus_weight(per_cpu(cpu_core_map, cpu)));
60 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
61 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
62 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
67 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
71 "fpu_exception\t: yes\n"
78 static int show_cpuinfo(struct seq_file *m, void *v)
80 struct cpuinfo_x86 *c = v;
87 seq_printf(m, "processor\t: %u\n"
93 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
96 c->x86_model_id[0] ? c->x86_model_id : "unknown");
98 if (c->x86_mask || c->cpuid_level >= 0)
99 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
101 seq_printf(m, "stepping\t: unknown\n");
103 if (cpu_has(c, X86_FEATURE_TSC)) {
104 unsigned int freq = cpufreq_quick_get(cpu);
108 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
109 freq / 1000, (freq % 1000));
113 if (c->x86_cache_size >= 0)
114 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
116 show_cpuinfo_core(m, c, cpu);
117 show_cpuinfo_misc(m, c);
119 seq_printf(m, "flags\t\t:");
120 for (i = 0; i < 32*NCAPINTS; i++)
121 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
122 seq_printf(m, " %s", x86_cap_flags[i]);
124 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
125 c->loops_per_jiffy/(500000/HZ),
126 (c->loops_per_jiffy/(5000/HZ)) % 100);
129 if (c->x86_tlbsize > 0)
130 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
132 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
134 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
135 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
136 c->x86_phys_bits, c->x86_virt_bits);
139 seq_printf(m, "power management:");
140 for (i = 0; i < 32; i++) {
141 if (c->x86_power & (1 << i)) {
142 if (i < ARRAY_SIZE(x86_power_flags) &&
144 seq_printf(m, "%s%s",
145 x86_power_flags[i][0]?" ":"",
148 seq_printf(m, " [%d]", i);
152 seq_printf(m, "\n\n");
157 static void *c_start(struct seq_file *m, loff_t *pos)
159 if (*pos == 0) /* just in case, cpu 0 is not the first */
160 *pos = first_cpu(cpu_online_map);
161 if ((*pos) < NR_CPUS && cpu_online(*pos))
162 return &cpu_data(*pos);
166 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
168 *pos = next_cpu(*pos, cpu_online_map);
169 return c_start(m, pos);
172 static void c_stop(struct seq_file *m, void *v)
176 const struct seq_operations cpuinfo_op = {
180 .show = show_cpuinfo,