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   1 #include <linux/smp.h>
   2 #include <linux/timex.h>
   3 #include <linux/string.h>
   4 #include <asm/semaphore.h>
   5 #include <linux/seq_file.h>
   6 #include <linux/cpufreq.h>
   7
   8 /*
   9  *      Get CPU information for use by the procfs.
  10  */
  11 #ifdef CONFIG_X86_32
  12 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
  13                               unsigned int cpu)
  14 {
  15 #ifdef CONFIG_X86_HT
  16         if (c->x86_max_cores * smp_num_siblings > 1) {
  17                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  18                 seq_printf(m, "siblings\t: %d\n",
  19                            cpus_weight(per_cpu(cpu_core_map, cpu)));
  20                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  21                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  22         }
  23 #endif
  24 }
  25
  26 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  27 {
  28         /*
  29          * We use exception 16 if we have hardware math and we've either seen
  30          * it or the CPU claims it is internal
  31          */
  32         int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
  33         seq_printf(m,
  34                    "fdiv_bug\t: %s\n"
  35                    "hlt_bug\t\t: %s\n"
  36                    "f00f_bug\t: %s\n"
  37                    "coma_bug\t: %s\n"
  38                    "fpu\t\t: %s\n"
  39                    "fpu_exception\t: %s\n"
  40                    "cpuid level\t: %d\n"
  41                    "wp\t\t: %s\n",
  42                    c->fdiv_bug ? "yes" : "no",
  43                    c->hlt_works_ok ? "no" : "yes",
  44                    c->f00f_bug ? "yes" : "no",
  45                    c->coma_bug ? "yes" : "no",
  46                    c->hard_math ? "yes" : "no",
  47                    fpu_exception ? "yes" : "no",
  48                    c->cpuid_level,
  49                    c->wp_works_ok ? "yes" : "no");
  50 }
  51 #else
  52 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
  53                               unsigned int cpu)
  54 {
  55 #ifdef CONFIG_SMP
  56         if (c->x86_max_cores * smp_num_siblings > 1) {
  57                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
  58                 seq_printf(m, "siblings\t: %d\n",
  59                            cpus_weight(per_cpu(cpu_core_map, cpu)));
  60                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
  61                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
  62         }
  63 #endif
  64 }
  65
  66 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
  67 {
  68         seq_printf(m,
  69                    "fpu\t\t: yes\n"
  70                    "fpu_exception\t: yes\n"
  71                    "cpuid level\t: %d\n"
  72                    "wp\t\t: yes\n",
  73                    c->cpuid_level);
  74 }
  75 #endif
  76
  77 static int show_cpuinfo(struct seq_file *m, void *v)
  78 {
  79         struct cpuinfo_x86 *c = v;
  80         unsigned int cpu = 0;
  81         int i;
  82
  83 #ifdef CONFIG_SMP
  84         cpu = c->cpu_index;
  85 #endif
  86         seq_printf(m, "processor\t: %u\n"
  87                    "vendor_id\t: %s\n"
  88                    "cpu family\t: %d\n"
  89                    "model\t\t: %u\n"
  90                    "model name\t: %s\n",
  91                    cpu,
  92                    c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  93                    c->x86,
  94                    c->x86_model,
  95                    c->x86_model_id[0] ? c->x86_model_id : "unknown");
  96
  97         if (c->x86_mask || c->cpuid_level >= 0)
  98                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  99         else
 100                 seq_printf(m, "stepping\t: unknown\n");
 101
 102         if (cpu_has(c, X86_FEATURE_TSC)) {
 103                 unsigned int freq = cpufreq_quick_get(cpu);
 104
 105                 if (!freq)
 106                         freq = cpu_khz;
 107                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 108                            freq / 1000, (freq % 1000));
 109         }
 110
 111         /* Cache size */
 112         if (c->x86_cache_size >= 0)
 113                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 114
 115         show_cpuinfo_core(m, c, cpu);
 116         show_cpuinfo_misc(m, c);
 117
 118         seq_printf(m, "flags\t\t:");
 119         for (i = 0; i < 32*NCAPINTS; i++)
 120                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 121                         seq_printf(m, " %s", x86_cap_flags[i]);
 122
 123         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 124                    c->loops_per_jiffy/(500000/HZ),
 125                    (c->loops_per_jiffy/(5000/HZ)) % 100);
 126
 127 #ifdef CONFIG_X86_64
 128         if (c->x86_tlbsize > 0)
 129                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
 130 #endif
 131         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 132 #ifdef CONFIG_X86_64
 133         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 134         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
 135                    c->x86_phys_bits, c->x86_virt_bits);
 136 #endif
 137
 138         seq_printf(m, "power management:");
 139         for (i = 0; i < 32; i++) {
 140                 if (c->x86_power & (1 << i)) {
 141                         if (i < ARRAY_SIZE(x86_power_flags) &&
 142                             x86_power_flags[i])
 143                                 seq_printf(m, "%s%s",
 144                                            x86_power_flags[i][0]?" ":"",
 145                                            x86_power_flags[i]);
 146                         else
 147                                 seq_printf(m, " [%d]", i);
 148                 }
 149         }
 150
 151         seq_printf(m, "\n\n");
 152
 153         return 0;
 154 }
 155
 156 static void *c_start(struct seq_file *m, loff_t *pos)
 157 {
 158         if (*pos == 0)  /* just in case, cpu 0 is not the first */
 159                 *pos = first_cpu(cpu_online_map);
 160         if ((*pos) < NR_CPUS && cpu_online(*pos))
 161                 return &cpu_data(*pos);
 162         return NULL;
 163 }
 164
 165 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 166 {
 167         *pos = next_cpu(*pos, cpu_online_map);
 168         return c_start(m, pos);
 169 }
 170
 171 static void c_stop(struct seq_file *m, void *v)
 172 {
 173 }
 174
 175 const struct seq_operations cpuinfo_op = {
 176         .start  = c_start,
 177         .next   = c_next,
 178         .stop   = c_stop,
 179         .show   = show_cpuinfo,
 180 };