perf_events, x86: Remove spurious counter reset from x86_pmu_enable()
[linux-2.6.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 = 0;
68         int i;
69
70 #ifdef CONFIG_SMP
71         cpu = c->cpu_index;
72 #endif
73         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");
83
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
89         if (cpu_has(c, X86_FEATURE_TSC)) {
90                 unsigned int freq = cpufreq_quick_get(cpu);
91
92                 if (!freq)
93                         freq = cpu_khz;
94                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
95                            freq / 1000, (freq % 1000));
96         }
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);
101
102         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)
108                         seq_printf(m, " %s", x86_cap_flags[i]);
109
110         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
111                    c->loops_per_jiffy/(500000/HZ),
112                    (c->loops_per_jiffy/(5000/HZ)) % 100);
113
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
118         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
119         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);
122
123         seq_printf(m, "power management:");
124         for (i = 0; i < 32; i++) {
125                 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",
129                                            x86_power_flags[i][0] ? " " : "",
130                                            x86_power_flags[i]);
131                         else
132                                 seq_printf(m, " [%d]", i);
133                 }
134         }
135
136         seq_printf(m, "\n\n");
137
138         return 0;
139 }
140
141 static void *c_start(struct seq_file *m, loff_t *pos)
142 {
143         if (*pos == 0)  /* just in case, cpu 0 is not the first */
144                 *pos = cpumask_first(cpu_online_mask);
145         else
146                 *pos = cpumask_next(*pos - 1, cpu_online_mask);
147         if ((*pos) < nr_cpu_ids)
148                 return &cpu_data(*pos);
149         return NULL;
150 }
151
152 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
153 {
154         (*pos)++;
155         return c_start(m, pos);
156 }
157
158 static void c_stop(struct seq_file *m, void *v)
159 {
160 }
161
162 const struct seq_operations cpuinfo_op = {
163         .start  = c_start,
164         .next   = c_next,
165         .stop   = c_stop,
166         .show   = show_cpuinfo,
167 };