72c365a12406c02975bfdbfb8307b1c611415018
[kernel/linux-3.0.git] / arch / x86 / kernel / cpu / proc.c
1 #include <linux/smp.h>
2 #include <linux/timex.h>
3 #include <linux/string.h>
4 #include <linux/seq_file.h>
5 #include <linux/cpufreq.h>
6
7 /*
8  *      Get CPU information for use by the procfs.
9  */
10 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
11                               unsigned int cpu)
12 {
13 #ifdef CONFIG_SMP
14         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",
17                            cpumask_weight(cpu_core_mask(cpu)));
18                 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);
20                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
21                 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
22         }
23 #endif
24 }
25
26 #ifdef CONFIG_X86_32
27 static 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 }
52 #else
53 static 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
63
64 static int show_cpuinfo(struct seq_file *m, void *v)
65 {
66         struct cpuinfo_x86 *c = v;
67         unsigned int cpu;
68         int i;
69
70         cpu = c->cpu_index;
71         seq_printf(m, "processor\t: %u\n"
72                    "vendor_id\t: %s\n"
73                    "cpu family\t: %d\n"
74                    "model\t\t: %u\n"
75                    "model name\t: %s\n",
76                    cpu,
77                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
78                    c->x86,
79                    c->x86_model,
80                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
81
82         if (c->x86_mask || c->cpuid_level >= 0)
83                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
84         else
85                 seq_printf(m, "stepping\t: unknown\n");
86
87         if (cpu_has(c, X86_FEATURE_TSC)) {
88                 unsigned int freq = cpufreq_quick_get(cpu);
89
90                 if (!freq)
91                         freq = cpu_khz;
92                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
93                            freq / 1000, (freq % 1000));
94         }
95
96         /* Cache size */
97         if (c->x86_cache_size >= 0)
98                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
99
100         show_cpuinfo_core(m, c, cpu);
101         show_cpuinfo_misc(m, c);
102
103         seq_printf(m, "flags\t\t:");
104         for (i = 0; i < 32*NCAPINTS; i++)
105                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
106                         seq_printf(m, " %s", x86_cap_flags[i]);
107
108         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
109                    c->loops_per_jiffy/(500000/HZ),
110                    (c->loops_per_jiffy/(5000/HZ)) % 100);
111
112 #ifdef CONFIG_X86_64
113         if (c->x86_tlbsize > 0)
114                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
115 #endif
116         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
117         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
118         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
119                    c->x86_phys_bits, c->x86_virt_bits);
120
121         seq_printf(m, "power management:");
122         for (i = 0; i < 32; i++) {
123                 if (c->x86_power & (1 << i)) {
124                         if (i < ARRAY_SIZE(x86_power_flags) &&
125                             x86_power_flags[i])
126                                 seq_printf(m, "%s%s",
127                                            x86_power_flags[i][0] ? " " : "",
128                                            x86_power_flags[i]);
129                         else
130                                 seq_printf(m, " [%d]", i);
131                 }
132         }
133
134         seq_printf(m, "\n\n");
135
136         return 0;
137 }
138
139 static void *c_start(struct seq_file *m, loff_t *pos)
140 {
141         if (*pos == 0)  /* just in case, cpu 0 is not the first */
142                 *pos = cpumask_first(cpu_online_mask);
143         else
144                 *pos = cpumask_next(*pos - 1, cpu_online_mask);
145         if ((*pos) < nr_cpu_ids)
146                 return &cpu_data(*pos);
147         return NULL;
148 }
149
150 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
151 {
152         (*pos)++;
153         return c_start(m, pos);
154 }
155
156 static void c_stop(struct seq_file *m, void *v)
157 {
158 }
159
160 const struct seq_operations cpuinfo_op = {
161         .start  = c_start,
162         .next   = c_next,
163         .stop   = c_stop,
164         .show   = show_cpuinfo,
165 };