arch/x86/kernel/cpu/proc.c

   1 #include <linux/smp.h>
   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>
   7
   8 /*
   9  *      Get CPU information for use by the procfs.
  10  */
  11 #ifdef CONFIG_X86_32
  12 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
  13                               unsigned int cpu)
  14 {
  15 #ifdef CONFIG_X86_HT
  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);
  22                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
  23                 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
  24         }
  25 #endif
  26 }
  27
  28 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  29 {
  30         /*
  31          * We use exception 16 if we have hardware math and we've either seen
  32          * it or the CPU claims it is internal
  33          */
  34         int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
  35         seq_printf(m,
  36                    "fdiv_bug\t: %s\n"
  37                    "hlt_bug\t\t: %s\n"
  38                    "f00f_bug\t: %s\n"
  39                    "coma_bug\t: %s\n"
  40                    "fpu\t\t: %s\n"
  41                    "fpu_exception\t: %s\n"
  42                    "cpuid level\t: %d\n"
  43                    "wp\t\t: %s\n",
  44                    c->fdiv_bug ? "yes" : "no",
  45                    c->hlt_works_ok ? "no" : "yes",
  46                    c->f00f_bug ? "yes" : "no",
  47                    c->coma_bug ? "yes" : "no",
  48                    c->hard_math ? "yes" : "no",
  49                    fpu_exception ? "yes" : "no",
  50                    c->cpuid_level,
  51                    c->wp_works_ok ? "yes" : "no");
  52 }
  53 #else
  54 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
  55                               unsigned int cpu)
  56 {
  57 #ifdef CONFIG_SMP
  58         if (c->x86_max_cores * smp_num_siblings > 1) {
  59                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  60                 seq_printf(m, "siblings\t: %d\n",
  61                            cpus_weight(per_cpu(cpu_core_map, cpu)));
  62                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  63                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  64                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
  65                 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
  66         }
  67 #endif
  68 }
  69
  70 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  71 {
  72         seq_printf(m,
  73                    "fpu\t\t: yes\n"
  74                    "fpu_exception\t: yes\n"
  75                    "cpuid level\t: %d\n"
  76                    "wp\t\t: yes\n",
  77                    c->cpuid_level);
  78 }
  79 #endif
  80
  81 static int show_cpuinfo(struct seq_file *m, void *v)
  82 {
  83         struct cpuinfo_x86 *c = v;
  84         unsigned int cpu = 0;
  85         int i;
  86
  87 #ifdef CONFIG_SMP
  88         cpu = c->cpu_index;
  89 #endif
  90         seq_printf(m, "processor\t: %u\n"
  91                    "vendor_id\t: %s\n"
  92                    "cpu family\t: %d\n"
  93                    "model\t\t: %u\n"
  94                    "model name\t: %s\n",
  95                    cpu,
  96                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  97                    c->x86,
  98                    c->x86_model,
  99                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
 100
 101         if (c->x86_mask || c->cpuid_level >= 0)
 102                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
 103         else
 104                 seq_printf(m, "stepping\t: unknown\n");
 105
 106         if (cpu_has(c, X86_FEATURE_TSC)) {
 107                 unsigned int freq = cpufreq_quick_get(cpu);
 108
 109                 if (!freq)
 110                         freq = cpu_khz;
 111                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 112                            freq / 1000, (freq % 1000));
 113         }
 114
 115         /* Cache size */
 116         if (c->x86_cache_size >= 0)
 117                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 118
 119         show_cpuinfo_core(m, c, cpu);
 120         show_cpuinfo_misc(m, c);
 121
 122         seq_printf(m, "flags\t\t:");
 123         for (i = 0; i < 32*NCAPINTS; i++)
 124                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 125                         seq_printf(m, " %s", x86_cap_flags[i]);
 126
 127         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 128                    c->loops_per_jiffy/(500000/HZ),
 129                    (c->loops_per_jiffy/(5000/HZ)) % 100);
 130
 131 #ifdef CONFIG_X86_64
 132         if (c->x86_tlbsize > 0)
 133                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 134 #endif
 135         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 136 #ifdef CONFIG_X86_64
 137         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 138         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 139                    c->x86_phys_bits, c->x86_virt_bits);
 140 #endif
 141
 142         seq_printf(m, "power management:");
 143         for (i = 0; i < 32; i++) {
 144                 if (c->x86_power & (1 << i)) {
 145                         if (i < ARRAY_SIZE(x86_power_flags) &&
 146                             x86_power_flags[i])
 147                                 seq_printf(m, "%s%s",
 148                                            x86_power_flags[i][0]?" ":"",
 149                                            x86_power_flags[i]);
 150                         else
 151                                 seq_printf(m, " [%d]", i);
 152                 }
 153         }
 154
 155         seq_printf(m, "\n\n");
 156
 157         return 0;
 158 }
 159
 160 static void *c_start(struct seq_file *m, loff_t *pos)
 161 {
 162         if (*pos == 0)  /* just in case, cpu 0 is not the first */
 163                 *pos = first_cpu(cpu_online_map);
 164         if ((*pos) < NR_CPUS && cpu_online(*pos))
 165                 return &cpu_data(*pos);
 166         return NULL;
 167 }
 168
 169 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 170 {
 171         *pos = next_cpu(*pos, cpu_online_map);
 172         return c_start(m, pos);
 173 }
 174
 175 static void c_stop(struct seq_file *m, void *v)
 176 {
 177 }
 178
 179 const struct seq_operations cpuinfo_op = {
 180         .start  = c_start,
 181         .next   = c_next,
 182         .stop   = c_stop,
 183         .show   = show_cpuinfo,
 184 };