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         seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  15         seq_printf(m, "siblings\t: %d\n", cpumask_weight(cpu_core_mask(cpu)));
  16         seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  17         seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  18         seq_printf(m, "apicid\t\t: %d\n", c->apicid);
  19         seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
  20 #endif
  21 }
  22
  23 #ifdef CONFIG_X86_32
  24 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  25 {
  26         seq_printf(m,
  27                    "fdiv_bug\t: %s\n"
  28                    "f00f_bug\t: %s\n"
  29                    "coma_bug\t: %s\n"
  30                    "fpu\t\t: %s\n"
  31                    "fpu_exception\t: %s\n"
  32                    "cpuid level\t: %d\n"
  33                    "wp\t\t: %s\n",
  34                    static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
  35                    static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
  36                    static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
  37                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
  38                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
  39                    c->cpuid_level,
  40                    c->wp_works_ok ? "yes" : "no");
  41 }
  42 #else
  43 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  44 {
  45         seq_printf(m,
  46                    "fpu\t\t: yes\n"
  47                    "fpu_exception\t: yes\n"
  48                    "cpuid level\t: %d\n"
  49                    "wp\t\t: yes\n",
  50                    c->cpuid_level);
  51 }
  52 #endif
  53
  54 static int show_cpuinfo(struct seq_file *m, void *v)
  55 {
  56         struct cpuinfo_x86 *c = v;
  57         unsigned int cpu;
  58         int i;
  59
  60         cpu = c->cpu_index;
  61         seq_printf(m, "processor\t: %u\n"
  62                    "vendor_id\t: %s\n"
  63                    "cpu family\t: %d\n"
  64                    "model\t\t: %u\n"
  65                    "model name\t: %s\n",
  66                    cpu,
  67                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  68                    c->x86,
  69                    c->x86_model,
  70                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
  71
  72         if (c->x86_mask || c->cpuid_level >= 0)
  73                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  74         else
  75                 seq_puts(m, "stepping\t: unknown\n");
  76         if (c->microcode)
  77                 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
  78
  79         if (cpu_has(c, X86_FEATURE_TSC)) {
  80                 unsigned int freq = cpufreq_quick_get(cpu);
  81
  82                 if (!freq)
  83                         freq = cpu_khz;
  84                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
  85                            freq / 1000, (freq % 1000));
  86         }
  87
  88         /* Cache size */
  89         if (c->x86_cache_size >= 0)
  90                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
  91
  92         show_cpuinfo_core(m, c, cpu);
  93         show_cpuinfo_misc(m, c);
  94
  95         seq_puts(m, "flags\t\t:");
  96         for (i = 0; i < 32*NCAPINTS; i++)
  97                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
  98                         seq_printf(m, " %s", x86_cap_flags[i]);
  99
 100         seq_puts(m, "\nbugs\t\t:");
 101         for (i = 0; i < 32*NBUGINTS; i++) {
 102                 unsigned int bug_bit = 32*NCAPINTS + i;
 103
 104                 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
 105                         seq_printf(m, " %s", x86_bug_flags[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
 112 #ifdef CONFIG_X86_64
 113         if (c->x86_tlbsize > 0)
 114                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 115 #endif
 116         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 117         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 118         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 119                    c->x86_phys_bits, c->x86_virt_bits);
 120
 121         seq_puts(m, "power management:");
 122         for (i = 0; i < 32; i++) {
 123                 if (c->x86_power & (1 << i)) {
 124                         if (i < ARRAY_SIZE(x86_power_flags) &&
 125                             x86_power_flags[i])
 126                                 seq_printf(m, "%s%s",
 127                                            x86_power_flags[i][0] ? " " : "",
 128                                            x86_power_flags[i]);
 129                         else
 130                                 seq_printf(m, " [%d]", i);
 131                 }
 132         }
 133
 134         seq_puts(m, "\n\n");
 135
 136         return 0;
 137 }
 138
 139 static void *c_start(struct seq_file *m, loff_t *pos)
 140 {
 141         *pos = cpumask_next(*pos - 1, cpu_online_mask);
 142         if ((*pos) < nr_cpu_ids)
 143                 return &cpu_data(*pos);
 144         return NULL;
 145 }
 146
 147 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 148 {
 149         (*pos)++;
 150         return c_start(m, pos);
 151 }
 152
 153 static void c_stop(struct seq_file *m, void *v)
 154 {
 155 }
 156
 157 const struct seq_operations cpuinfo_op = {
 158         .start  = c_start,
 159         .next   = c_next,
 160         .stop   = c_stop,
 161         .show   = show_cpuinfo,
 162 };