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         seq_printf(m,
  30                    "fdiv_bug\t: %s\n"
  31                    "f00f_bug\t: %s\n"
  32                    "coma_bug\t: %s\n"
  33                    "fpu\t\t: %s\n"
  34                    "fpu_exception\t: %s\n"
  35                    "cpuid level\t: %d\n"
  36                    "wp\t\t: %s\n",
  37                    static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
  38                    static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
  39                    static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
  40                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
  41                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
  42                    c->cpuid_level,
  43                    c->wp_works_ok ? "yes" : "no");
  44 }
  45 #else
  46 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  47 {
  48         seq_printf(m,
  49                    "fpu\t\t: yes\n"
  50                    "fpu_exception\t: yes\n"
  51                    "cpuid level\t: %d\n"
  52                    "wp\t\t: yes\n",
  53                    c->cpuid_level);
  54 }
  55 #endif
  56
  57 static int show_cpuinfo(struct seq_file *m, void *v)
  58 {
  59         struct cpuinfo_x86 *c = v;
  60         unsigned int cpu;
  61         int i;
  62
  63         cpu = c->cpu_index;
  64         seq_printf(m, "processor\t: %u\n"
  65                    "vendor_id\t: %s\n"
  66                    "cpu family\t: %d\n"
  67                    "model\t\t: %u\n"
  68                    "model name\t: %s\n",
  69                    cpu,
  70                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  71                    c->x86,
  72                    c->x86_model,
  73                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
  74
  75         if (c->x86_mask || c->cpuid_level >= 0)
  76                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  77         else
  78                 seq_printf(m, "stepping\t: unknown\n");
  79         if (c->microcode)
  80                 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
  81
  82         if (cpu_has(c, X86_FEATURE_TSC)) {
  83                 unsigned int freq = cpufreq_quick_get(cpu);
  84
  85                 if (!freq)
  86                         freq = cpu_khz;
  87                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
  88                            freq / 1000, (freq % 1000));
  89         }
  90
  91         /* Cache size */
  92         if (c->x86_cache_size >= 0)
  93                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
  94
  95         show_cpuinfo_core(m, c, cpu);
  96         show_cpuinfo_misc(m, c);
  97
  98         seq_printf(m, "flags\t\t:");
  99         for (i = 0; i < 32*NCAPINTS; i++)
 100                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 101                         seq_printf(m, " %s", x86_cap_flags[i]);
 102
 103         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 104                    c->loops_per_jiffy/(500000/HZ),
 105                    (c->loops_per_jiffy/(5000/HZ)) % 100);
 106
 107 #ifdef CONFIG_X86_64
 108         if (c->x86_tlbsize > 0)
 109                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 110 #endif
 111         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 112         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 113         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 114                    c->x86_phys_bits, c->x86_virt_bits);
 115
 116         seq_printf(m, "power management:");
 117         for (i = 0; i < 32; i++) {
 118                 if (c->x86_power & (1 << i)) {
 119                         if (i < ARRAY_SIZE(x86_power_flags) &&
 120                             x86_power_flags[i])
 121                                 seq_printf(m, "%s%s",
 122                                            x86_power_flags[i][0] ? " " : "",
 123                                            x86_power_flags[i]);
 124                         else
 125                                 seq_printf(m, " [%d]", i);
 126                 }
 127         }
 128
 129         seq_printf(m, "\n\n");
 130
 131         return 0;
 132 }
 133
 134 static void *c_start(struct seq_file *m, loff_t *pos)
 135 {
 136         *pos = cpumask_next(*pos - 1, cpu_online_mask);
 137         if ((*pos) < nr_cpu_ids)
 138                 return &cpu_data(*pos);
 139         return NULL;
 140 }
 141
 142 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 143 {
 144         (*pos)++;
 145         return c_start(m, pos);
 146 }
 147
 148 static void c_stop(struct seq_file *m, void *v)
 149 {
 150 }
 151
 152 const struct seq_operations cpuinfo_op = {
 153         .start  = c_start,
 154         .next   = c_next,
 155         .stop   = c_stop,
 156         .show   = show_cpuinfo,
 157 };