linux/arch/x86/kernel/cpu/proc.c
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   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 */
  10static 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
  27static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  28{
  29        seq_printf(m,
  30                   "fdiv_bug\t: %s\n"
  31                   "hlt_bug\t\t: %s\n"
  32                   "f00f_bug\t: %s\n"
  33                   "coma_bug\t: %s\n"
  34                   "fpu\t\t: %s\n"
  35                   "fpu_exception\t: %s\n"
  36                   "cpuid level\t: %d\n"
  37                   "wp\t\t: %s\n",
  38                   c->fdiv_bug ? "yes" : "no",
  39                   c->hlt_works_ok ? "no" : "yes",
  40                   c->f00f_bug ? "yes" : "no",
  41                   c->coma_bug ? "yes" : "no",
  42                   c->hard_math ? "yes" : "no",
  43                   c->hard_math ? "yes" : "no",
  44                   c->cpuid_level,
  45                   c->wp_works_ok ? "yes" : "no");
  46}
  47#else
  48static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  49{
  50        seq_printf(m,
  51                   "fpu\t\t: yes\n"
  52                   "fpu_exception\t: yes\n"
  53                   "cpuid level\t: %d\n"
  54                   "wp\t\t: yes\n",
  55                   c->cpuid_level);
  56}
  57#endif
  58
  59static int show_cpuinfo(struct seq_file *m, void *v)
  60{
  61        struct cpuinfo_x86 *c = v;
  62        unsigned int cpu;
  63        int i;
  64
  65        cpu = c->cpu_index;
  66        seq_printf(m, "processor\t: %u\n"
  67                   "vendor_id\t: %s\n"
  68                   "cpu family\t: %d\n"
  69                   "model\t\t: %u\n"
  70                   "model name\t: %s\n",
  71                   cpu,
  72                   c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  73                   c->x86,
  74                   c->x86_model,
  75                   c->x86_model_id[0] ? c->x86_model_id : "unknown");
  76
  77        if (c->x86_mask || c->cpuid_level >= 0)
  78                seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  79        else
  80                seq_printf(m, "stepping\t: unknown\n");
  81        if (c->microcode)
  82                seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
  83
  84        if (cpu_has(c, X86_FEATURE_TSC)) {
  85                unsigned int freq = cpufreq_quick_get(cpu);
  86
  87                if (!freq)
  88                        freq = cpu_khz;
  89                seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
  90                           freq / 1000, (freq % 1000));
  91        }
  92
  93        /* Cache size */
  94        if (c->x86_cache_size >= 0)
  95                seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
  96
  97        show_cpuinfo_core(m, c, cpu);
  98        show_cpuinfo_misc(m, c);
  99
 100        seq_printf(m, "flags\t\t:");
 101        for (i = 0; i < 32*NCAPINTS; i++)
 102                if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 103                        seq_printf(m, " %s", x86_cap_flags[i]);
 104
 105        seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 106                   c->loops_per_jiffy/(500000/HZ),
 107                   (c->loops_per_jiffy/(5000/HZ)) % 100);
 108
 109#ifdef CONFIG_X86_64
 110        if (c->x86_tlbsize > 0)
 111                seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 112#endif
 113        seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 114        seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 115        seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 116                   c->x86_phys_bits, c->x86_virt_bits);
 117
 118        seq_printf(m, "power management:");
 119        for (i = 0; i < 32; i++) {
 120                if (c->x86_power & (1 << i)) {
 121                        if (i < ARRAY_SIZE(x86_power_flags) &&
 122                            x86_power_flags[i])
 123                                seq_printf(m, "%s%s",
 124                                           x86_power_flags[i][0] ? " " : "",
 125                                           x86_power_flags[i]);
 126                        else
 127                                seq_printf(m, " [%d]", i);
 128                }
 129        }
 130
 131        seq_printf(m, "\n\n");
 132
 133        return 0;
 134}
 135
 136static void *c_start(struct seq_file *m, loff_t *pos)
 137{
 138        *pos = cpumask_next(*pos - 1, cpu_online_mask);
 139        if ((*pos) < nr_cpu_ids)
 140                return &cpu_data(*pos);
 141        return NULL;
 142}
 143
 144static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 145{
 146        (*pos)++;
 147        return c_start(m, pos);
 148}
 149
 150static void c_stop(struct seq_file *m, void *v)
 151{
 152}
 153
 154const struct seq_operations cpuinfo_op = {
 155        .start  = c_start,
 156        .next   = c_next,
 157        .stop   = c_stop,
 158        .show   = show_cpuinfo,
 159};
 160
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