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
   6 /*
   7  *      Get CPU information for use by the procfs.
   8  */
   9 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
  10                               unsigned int cpu)
  11 {
  12 #ifdef CONFIG_SMP
  13         seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  14         seq_printf(m, "siblings\t: %d\n",
  15                    cpumask_weight(topology_core_cpumask(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: yes\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 }
  41 #else
  42 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  43 {
  44         seq_printf(m,
  45                    "fpu\t\t: yes\n"
  46                    "fpu_exception\t: yes\n"
  47                    "cpuid level\t: %d\n"
  48                    "wp\t\t: yes\n",
  49                    c->cpuid_level);
  50 }
  51 #endif
  52
  53 static int show_cpuinfo(struct seq_file *m, void *v)
  54 {
  55         struct cpuinfo_x86 *c = v;
  56         unsigned int cpu;
  57         int i;
  58
  59         cpu = c->cpu_index;
  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_puts(m, "stepping\t: unknown\n");
  75         if (c->microcode)
  76                 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
  77
  78         if (cpu_has(c, X86_FEATURE_TSC))
  79                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
  80                            cpu_khz / 1000, (cpu_khz % 1000));
  81
  82         /* Cache size */
  83         if (c->x86_cache_size >= 0)
  84                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
  85
  86         show_cpuinfo_core(m, c, cpu);
  87         show_cpuinfo_misc(m, c);
  88
  89         seq_puts(m, "flags\t\t:");
  90         for (i = 0; i < 32*NCAPINTS; i++)
  91                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
  92                         seq_printf(m, " %s", x86_cap_flags[i]);
  93
  94         seq_puts(m, "\nbugs\t\t:");
  95         for (i = 0; i < 32*NBUGINTS; i++) {
  96                 unsigned int bug_bit = 32*NCAPINTS + i;
  97
  98                 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
  99                         seq_printf(m, " %s", x86_bug_flags[i]);
 100         }
 101
 102         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 103                    c->loops_per_jiffy/(500000/HZ),
 104                    (c->loops_per_jiffy/(5000/HZ)) % 100);
 105
 106 #ifdef CONFIG_X86_64
 107         if (c->x86_tlbsize > 0)
 108                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 109 #endif
 110         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 111         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 112         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 113                    c->x86_phys_bits, c->x86_virt_bits);
 114
 115         seq_puts(m, "power management:");
 116         for (i = 0; i < 32; i++) {
 117                 if (c->x86_power & (1 << i)) {
 118                         if (i < ARRAY_SIZE(x86_power_flags) &&
 119                             x86_power_flags[i])
 120                                 seq_printf(m, "%s%s",
 121                                            x86_power_flags[i][0] ? " " : "",
 122                                            x86_power_flags[i]);
 123                         else
 124                                 seq_printf(m, " [%d]", i);
 125                 }
 126         }
 127
 128         seq_puts(m, "\n\n");
 129
 130         return 0;
 131 }
 132
 133 static void *c_start(struct seq_file *m, loff_t *pos)
 134 {
 135         *pos = cpumask_next(*pos - 1, cpu_online_mask);
 136         if ((*pos) < nr_cpu_ids)
 137                 return &cpu_data(*pos);
 138         return NULL;
 139 }
 140
 141 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 142 {
 143         (*pos)++;
 144         return c_start(m, pos);
 145 }
 146
 147 static void c_stop(struct seq_file *m, void *v)
 148 {
 149 }
 150
 151 const struct seq_operations cpuinfo_op = {
 152         .start  = c_start,
 153         .next   = c_next,
 154         .stop   = c_stop,
 155         .show   = show_cpuinfo,
 156 };