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 void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
  12                               unsigned int cpu)
  13 {
  14 #ifdef CONFIG_X86_HT
  15         if (c->x86_max_cores * smp_num_siblings > 1) {
  16                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  17                 seq_printf(m, "siblings\t: %d\n",
  18                            cpus_weight(per_cpu(cpu_core_map, cpu)));
  19                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  20                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  21         }
  22 #endif
  23 }
  24
  25 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  26 {
  27         /*
  28          * We use exception 16 if we have hardware math and we've either seen
  29          * it or the CPU claims it is internal
  30          */
  31         int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
  32         seq_printf(m,
  33                    "fdiv_bug\t: %s\n"
  34                    "hlt_bug\t\t: %s\n"
  35                    "f00f_bug\t: %s\n"
  36                    "coma_bug\t: %s\n"
  37                    "fpu\t\t: %s\n"
  38                    "fpu_exception\t: %s\n"
  39                    "cpuid level\t: %d\n"
  40                    "wp\t\t: %s\n",
  41                    c->fdiv_bug ? "yes" : "no",
  42                    c->hlt_works_ok ? "no" : "yes",
  43                    c->f00f_bug ? "yes" : "no",
  44                    c->coma_bug ? "yes" : "no",
  45                    c->hard_math ? "yes" : "no",
  46                    fpu_exception ? "yes" : "no",
  47                    c->cpuid_level,
  48                    c->wp_works_ok ? "yes" : "no");
  49 }
  50
  51 static int show_cpuinfo(struct seq_file *m, void *v)
  52 {
  53         struct cpuinfo_x86 *c = v;
  54         unsigned int cpu = 0;
  55         int i;
  56
  57 #ifdef CONFIG_SMP
  58         cpu = c->cpu_index;
  59 #endif
  60         seq_printf(m, "processor\t: %u\n"
  61                    "vendor_id\t: %s\n"
  62                    "cpu family\t: %d\n"
  63                    "model\t\t: %u\n"
  64                    "model name\t: %s\n",
  65                    cpu,
  66                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  67                    c->x86,
  68                    c->x86_model,
  69                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
  70
  71         if (c->x86_mask || c->cpuid_level >= 0)
  72                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  73         else
  74                 seq_printf(m, "stepping\t: unknown\n");
  75
  76         if (cpu_has(c, X86_FEATURE_TSC)) {
  77                 unsigned int freq = cpufreq_quick_get(cpu);
  78
  79                 if (!freq)
  80                         freq = cpu_khz;
  81                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
  82                            freq / 1000, (freq % 1000));
  83         }
  84
  85         /* Cache size */
  86         if (c->x86_cache_size >= 0)
  87                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
  88
  89         show_cpuinfo_core(m, c, cpu);
  90         show_cpuinfo_misc(m, c);
  91
  92         seq_printf(m, "flags\t\t:");
  93         for (i = 0; i < 32*NCAPINTS; i++)
  94                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
  95                         seq_printf(m, " %s", x86_cap_flags[i]);
  96
  97         for (i = 0; i < 32; i++)
  98                 if (c->x86_power & (1 << i)) {
  99                         if (i < ARRAY_SIZE(x86_power_flags) &&
 100                             x86_power_flags[i])
 101                                 seq_printf(m, "%s%s",
 102                                            x86_power_flags[i][0]?" ":"",
 103                                            x86_power_flags[i]);
 104                         else
 105                                 seq_printf(m, " [%d]", i);
 106                 }
 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         seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);
 112
 113         return 0;
 114 }
 115
 116 static void *c_start(struct seq_file *m, loff_t *pos)
 117 {
 118         if (*pos == 0)  /* just in case, cpu 0 is not the first */
 119                 *pos = first_cpu(cpu_online_map);
 120         if ((*pos) < NR_CPUS && cpu_online(*pos))
 121                 return &cpu_data(*pos);
 122         return NULL;
 123 }
 124
 125 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 126 {
 127         *pos = next_cpu(*pos, cpu_online_map);
 128         return c_start(m, pos);
 129 }
 130
 131 static void c_stop(struct seq_file *m, void *v)
 132 {
 133 }
 134
 135 const struct seq_operations cpuinfo_op = {
 136         .start  = c_start,
 137         .next   = c_next,
 138         .stop   = c_stop,
 139         .show   = show_cpuinfo,
 140 };