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 static int show_cpuinfo(struct seq_file *m, void *v)
  12 {
  13         struct cpuinfo_x86 *c = v;
  14         int i, n = 0;
  15         int fpu_exception;
  16
  17 #ifdef CONFIG_SMP
  18         n = c->cpu_index;
  19 #endif
  20         seq_printf(m, "processor\t: %d\n"
  21                 "vendor_id\t: %s\n"
  22                 "cpu family\t: %d\n"
  23                 "model\t\t: %d\n"
  24                 "model name\t: %s\n",
  25                 n,
  26                 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  27                 c->x86,
  28                 c->x86_model,
  29                 c->x86_model_id[0] ? c->x86_model_id : "unknown");
  30
  31         if (c->x86_mask || c->cpuid_level >= 0)
  32                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  33         else
  34                 seq_printf(m, "stepping\t: unknown\n");
  35
  36         if ( cpu_has(c, X86_FEATURE_TSC) ) {
  37                 unsigned int freq = cpufreq_quick_get(n);
  38                 if (!freq)
  39                         freq = cpu_khz;
  40                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
  41                         freq / 1000, (freq % 1000));
  42         }
  43
  44         /* Cache size */
  45         if (c->x86_cache_size >= 0)
  46                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
  47 #ifdef CONFIG_X86_HT
  48         if (c->x86_max_cores * smp_num_siblings > 1) {
  49                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  50                 seq_printf(m, "siblings\t: %d\n",
  51                                 cpus_weight(per_cpu(cpu_core_map, n)));
  52                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  53                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  54         }
  55 #endif
  56
  57         /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
  58         fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
  59         seq_printf(m, "fdiv_bug\t: %s\n"
  60                         "hlt_bug\t\t: %s\n"
  61                         "f00f_bug\t: %s\n"
  62                         "coma_bug\t: %s\n"
  63                         "fpu\t\t: %s\n"
  64                         "fpu_exception\t: %s\n"
  65                         "cpuid level\t: %d\n"
  66                         "wp\t\t: %s\n"
  67                         "flags\t\t:",
  68                      c->fdiv_bug ? "yes" : "no",
  69                      c->hlt_works_ok ? "no" : "yes",
  70                      c->f00f_bug ? "yes" : "no",
  71                      c->coma_bug ? "yes" : "no",
  72                      c->hard_math ? "yes" : "no",
  73                      fpu_exception ? "yes" : "no",
  74                      c->cpuid_level,
  75                      c->wp_works_ok ? "yes" : "no");
  76
  77         for ( i = 0 ; i < 32*NCAPINTS ; i++ )
  78                 if ( test_bit(i, c->x86_capability) &&
  79                      x86_cap_flags[i] != NULL )
  80                         seq_printf(m, " %s", x86_cap_flags[i]);
  81
  82         for (i = 0; i < 32; i++)
  83                 if (c->x86_power & (1 << i)) {
  84                         if (i < ARRAY_SIZE(x86_power_flags) &&
  85                             x86_power_flags[i])
  86                                 seq_printf(m, "%s%s",
  87                                            x86_power_flags[i][0]?" ":"",
  88                                            x86_power_flags[i]);
  89                         else
  90                                 seq_printf(m, " [%d]", i);
  91                 }
  92
  93         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
  94                      c->loops_per_jiffy/(500000/HZ),
  95                      (c->loops_per_jiffy/(5000/HZ)) % 100);
  96         seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);
  97
  98         return 0;
  99 }
 100
 101 static void *c_start(struct seq_file *m, loff_t *pos)
 102 {
 103         if (*pos == 0)  /* just in case, cpu 0 is not the first */
 104                 *pos = first_cpu(cpu_online_map);
 105         if ((*pos) < NR_CPUS && cpu_online(*pos))
 106                 return &cpu_data(*pos);
 107         return NULL;
 108 }
 109 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 110 {
 111         *pos = next_cpu(*pos, cpu_online_map);
 112         return c_start(m, pos);
 113 }
 114 static void c_stop(struct seq_file *m, void *v)
 115 {
 116 }
 117 const struct seq_operations cpuinfo_op = {
 118         .start  = c_start,
 119         .next   = c_next,
 120         .stop   = c_stop,
 121         .show   = show_cpuinfo,
 122 };