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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/smp.h>
2#include <linux/timex.h>
3#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/seq_file.h>
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -08005#include <linux/cpufreq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7/*
8 * Get CPU information for use by the procfs.
9 */
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080010static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
11 unsigned int cpu)
12{
Jaswinder Singh Rajput327f4382009-02-28 18:50:21 +053013#ifdef CONFIG_SMP
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080014 if (c->x86_max_cores * smp_num_siblings > 1) {
15 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
16 seq_printf(m, "siblings\t: %d\n",
Andreas Herrmann35d11682009-05-04 20:28:59 +020017 cpumask_weight(cpu_core_mask(cpu)));
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080018 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
19 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
Yinghai Lu01aaea12008-03-06 13:46:39 -080020 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
21 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080022 }
23#endif
24}
25
Jaswinder Singh Rajput327f4382009-02-28 18:50:21 +053026#ifdef CONFIG_X86_32
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080027static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
28{
29 /*
30 * We use exception 16 if we have hardware math and we've either seen
31 * it or the CPU claims it is internal
32 */
33 int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
34 seq_printf(m,
35 "fdiv_bug\t: %s\n"
36 "hlt_bug\t\t: %s\n"
37 "f00f_bug\t: %s\n"
38 "coma_bug\t: %s\n"
39 "fpu\t\t: %s\n"
40 "fpu_exception\t: %s\n"
41 "cpuid level\t: %d\n"
42 "wp\t\t: %s\n",
43 c->fdiv_bug ? "yes" : "no",
44 c->hlt_works_ok ? "no" : "yes",
45 c->f00f_bug ? "yes" : "no",
46 c->coma_bug ? "yes" : "no",
47 c->hard_math ? "yes" : "no",
48 fpu_exception ? "yes" : "no",
49 c->cpuid_level,
50 c->wp_works_ok ? "yes" : "no");
51}
Hiroshi Shimamoto2aef7722008-02-20 10:48:02 -080052#else
Hiroshi Shimamoto2aef7722008-02-20 10:48:02 -080053static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
54{
55 seq_printf(m,
56 "fpu\t\t: yes\n"
57 "fpu_exception\t: yes\n"
58 "cpuid level\t: %d\n"
59 "wp\t\t: yes\n",
60 c->cpuid_level);
61}
62#endif
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static int show_cpuinfo(struct seq_file *m, void *v)
65{
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 struct cpuinfo_x86 *c = v;
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080067 unsigned int cpu = 0;
68 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70#ifdef CONFIG_SMP
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080071 cpu = c->cpu_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#endif
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080073 seq_printf(m, "processor\t: %u\n"
74 "vendor_id\t: %s\n"
75 "cpu family\t: %d\n"
76 "model\t\t: %u\n"
77 "model name\t: %s\n",
78 cpu,
79 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
80 c->x86,
81 c->x86_model,
82 c->x86_model_id[0] ? c->x86_model_id : "unknown");
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84 if (c->x86_mask || c->cpuid_level >= 0)
85 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
86 else
87 seq_printf(m, "stepping\t: unknown\n");
88
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080089 if (cpu_has(c, X86_FEATURE_TSC)) {
90 unsigned int freq = cpufreq_quick_get(cpu);
91
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -080092 if (!freq)
93 freq = cpu_khz;
Andrew Mortona3a255e2005-06-23 00:08:34 -070094 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -080095 freq / 1000, (freq % 1000));
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 }
97
98 /* Cache size */
99 if (c->x86_cache_size >= 0)
100 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -0800102 show_cpuinfo_core(m, c, cpu);
103 show_cpuinfo_misc(m, c);
104
105 seq_printf(m, "flags\t\t:");
106 for (i = 0; i < 32*NCAPINTS; i++)
107 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 seq_printf(m, " %s", x86_cap_flags[i]);
109
Hiroshi Shimamotof84c3a42008-02-20 10:47:12 -0800110 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
111 c->loops_per_jiffy/(500000/HZ),
112 (c->loops_per_jiffy/(5000/HZ)) % 100);
Hiroshi Shimamoto2aef7722008-02-20 10:48:02 -0800113
114#ifdef CONFIG_X86_64
115 if (c->x86_tlbsize > 0)
116 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
117#endif
Hiroshi Shimamotof84c3a42008-02-20 10:47:12 -0800118 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
Hiroshi Shimamoto2aef7722008-02-20 10:48:02 -0800119 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
120 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
121 c->x86_phys_bits, c->x86_virt_bits);
Hiroshi Shimamotof84c3a42008-02-20 10:47:12 -0800122
123 seq_printf(m, "power management:");
124 for (i = 0; i < 32; i++) {
Andi Kleen3f98bc42006-01-11 22:42:51 +0100125 if (c->x86_power & (1 << i)) {
126 if (i < ARRAY_SIZE(x86_power_flags) &&
127 x86_power_flags[i])
128 seq_printf(m, "%s%s",
Alan Cox8bdbd962009-07-04 00:35:45 +0100129 x86_power_flags[i][0] ? " " : "",
Andi Kleen3f98bc42006-01-11 22:42:51 +0100130 x86_power_flags[i]);
131 else
132 seq_printf(m, " [%d]", i);
133 }
Hiroshi Shimamotof84c3a42008-02-20 10:47:12 -0800134 }
Andi Kleen3f98bc42006-01-11 22:42:51 +0100135
Hiroshi Shimamotof84c3a42008-02-20 10:47:12 -0800136 seq_printf(m, "\n\n");
Andi Kleen3dd9d512005-04-16 15:25:15 -0700137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 return 0;
139}
140
141static void *c_start(struct seq_file *m, loff_t *pos)
142{
Mike Travis92cb7612007-10-19 20:35:04 +0200143 if (*pos == 0) /* just in case, cpu 0 is not the first */
Rusty Russell4f062892009-03-13 14:49:54 +1030144 *pos = cpumask_first(cpu_online_mask);
Lai Jiangshanbc8bcc72008-10-22 12:42:30 +0800145 else
Rusty Russell4f062892009-03-13 14:49:54 +1030146 *pos = cpumask_next(*pos - 1, cpu_online_mask);
Lai Jiangshanbc8bcc72008-10-22 12:42:30 +0800147 if ((*pos) < nr_cpu_ids)
Mike Travis92cb7612007-10-19 20:35:04 +0200148 return &cpu_data(*pos);
149 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150}
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -0800151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152static void *c_next(struct seq_file *m, void *v, loff_t *pos)
153{
Lai Jiangshanbc8bcc72008-10-22 12:42:30 +0800154 (*pos)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 return c_start(m, pos);
156}
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -0800157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158static void c_stop(struct seq_file *m, void *v)
159{
160}
Hiroshi Shimamotoa967cea2008-02-20 10:45:29 -0800161
Jan Engelhardt8a45eb32008-01-30 13:33:32 +0100162const struct seq_operations cpuinfo_op = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 .start = c_start,
164 .next = c_next,
165 .stop = c_stop,
166 .show = show_cpuinfo,
167};