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 };