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 #ifdef CONFIG_X86_32
  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                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
  22                 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
  23         }
  24 #endif
  25 }
  26
  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_core(struct seq_file *m, struct cpuinfo_x86 *c,
  54                               unsigned int cpu)
  55 {
  56 #ifdef CONFIG_SMP
  57         if (c->x86_max_cores * smp_num_siblings > 1) {
  58                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  59                 seq_printf(m, "siblings\t: %d\n",
  60                            cpus_weight(per_cpu(cpu_core_map, cpu)));
  61                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  62                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  63                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
  64                 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
  65         }
  66 #endif
  67 }
  68
  69 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  70 {
  71         seq_printf(m,
  72                    "fpu\t\t: yes\n"
  73                    "fpu_exception\t: yes\n"
  74                    "cpuid level\t: %d\n"
  75                    "wp\t\t: yes\n",
  76                    c->cpuid_level);
  77 }
  78 #endif
  79
  80 static int show_cpuinfo(struct seq_file *m, void *v)
  81 {
  82         struct cpuinfo_x86 *c = v;
  83         unsigned int cpu = 0;
  84         int i;
  85
  86 #ifdef CONFIG_SMP
  87         cpu = c->cpu_index;
  88 #endif
  89         seq_printf(m, "processor\t: %u\n"
  90                    "vendor_id\t: %s\n"
  91                    "cpu family\t: %d\n"
  92                    "model\t\t: %u\n"
  93                    "model name\t: %s\n",
  94                    cpu,
  95                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  96                    c->x86,
  97                    c->x86_model,
  98                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
  99
 100         if (c->x86_mask || c->cpuid_level >= 0)
 101                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
 102         else
 103                 seq_printf(m, "stepping\t: unknown\n");
 104
 105         if (cpu_has(c, X86_FEATURE_TSC)) {
 106                 unsigned int freq = cpufreq_quick_get(cpu);
 107
 108                 if (!freq)
 109                         freq = cpu_khz;
 110                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 111                            freq / 1000, (freq % 1000));
 112         }
 113
 114         /* Cache size */
 115         if (c->x86_cache_size >= 0)
 116                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 117
 118         show_cpuinfo_core(m, c, cpu);
 119         show_cpuinfo_misc(m, c);
 120
 121         seq_printf(m, "flags\t\t:");
 122         for (i = 0; i < 32*NCAPINTS; i++)
 123                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 124                         seq_printf(m, " %s", x86_cap_flags[i]);
 125
 126         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 127                    c->loops_per_jiffy/(500000/HZ),
 128                    (c->loops_per_jiffy/(5000/HZ)) % 100);
 129
 130 #ifdef CONFIG_X86_64
 131         if (c->x86_tlbsize > 0)
 132                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 133 #endif
 134         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 135 #ifdef CONFIG_X86_64
 136         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 137         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 138                    c->x86_phys_bits, c->x86_virt_bits);
 139 #endif
 140
 141         seq_printf(m, "power management:");
 142         for (i = 0; i < 32; i++) {
 143                 if (c->x86_power & (1 << i)) {
 144                         if (i < ARRAY_SIZE(x86_power_flags) &&
 145                             x86_power_flags[i])
 146                                 seq_printf(m, "%s%s",
 147                                            x86_power_flags[i][0]?" ":"",
 148                                            x86_power_flags[i]);
 149                         else
 150                                 seq_printf(m, " [%d]", i);
 151                 }
 152         }
 153
 154         seq_printf(m, "\n\n");
 155
 156         return 0;
 157 }
 158
 159 static void *c_start(struct seq_file *m, loff_t *pos)
 160 {
 161         if (*pos == 0)  /* just in case, cpu 0 is not the first */
 162                 *pos = first_cpu(cpu_online_map);
 163         if ((*pos) < nr_cpu_ids && cpu_online(*pos))
 164                 return &cpu_data(*pos);
 165         return NULL;
 166 }
 167
 168 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 169 {
 170         *pos = next_cpu(*pos, cpu_online_map);
 171         return c_start(m, pos);
 172 }
 173
 174 static void c_stop(struct seq_file *m, void *v)
 175 {
 176 }
 177
 178 const struct seq_operations cpuinfo_op = {
 179         .start  = c_start,
 180         .next   = c_next,
 181         .stop   = c_stop,
 182         .show   = show_cpuinfo,
 183 };