arch/i386/kernel/cpu/proc.c

   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 static int show_cpuinfo(struct seq_file *m, void *v)
  12 {
  13         /*
  14          * These flag bits must match the definitions in <asm/cpufeature.h>.
  15          * NULL means this bit is undefined or reserved; either way it doesn't
  16          * have meaning as far as Linux is concerned.  Note that it's important
  17          * to realize there is a difference between this table and CPUID -- if
  18          * applications want to get the raw CPUID data, they should access
  19          * /dev/cpu/<cpu_nr>/cpuid instead.
  20          */
  21         static const char * const x86_cap_flags[] = {
  22                 /* Intel-defined */
  23                 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
  24                 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
  25                 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
  26                 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
  27
  28                 /* AMD-defined */
  29                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  30                 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
  31                 NULL, NULL, NULL, "mp", "nx", NULL, "mmxext", NULL,
  32                 NULL, "fxsr_opt", "rdtscp", NULL, NULL, "lm", "3dnowext", "3dnow",
  33
  34                 /* Transmeta-defined */
  35                 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
  36                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  37                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  38                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  39
  40                 /* Other (Linux-defined) */
  41                 "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
  42                 NULL, NULL, NULL, NULL,
  43                 "constant_tsc", "up", NULL, NULL, NULL, NULL, NULL, NULL,
  44                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  45                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  46
  47                 /* Intel-defined (#2) */
  48                 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
  49                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
  50                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  51                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  52
  53                 /* VIA/Cyrix/Centaur-defined */
  54                 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
  55                 "ace2", "ace2_en", "phe", "phe_en", "pmm", "pmm_en", NULL, NULL,
  56                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  57                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  58
  59                 /* AMD-defined (#2) */
  60                 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8legacy", NULL, NULL, NULL,
  61                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  62                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  63                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  64         };
  65         static const char * const x86_power_flags[] = {
  66                 "ts",   /* temperature sensor */
  67                 "fid",  /* frequency id control */
  68                 "vid",  /* voltage id control */
  69                 "ttp",  /* thermal trip */
  70                 "tm",
  71                 "stc",
  72                 NULL,
  73                 /* nothing */   /* constant_tsc - moved to flags */
  74         };
  75         struct cpuinfo_x86 *c = v;
  76         int i, n = c - cpu_data;
  77         int fpu_exception;
  78
  79 #ifdef CONFIG_SMP
  80         if (!cpu_online(n))
  81                 return 0;
  82 #endif
  83         seq_printf(m, "processor\t: %d\n"
  84                 "vendor_id\t: %s\n"
  85                 "cpu family\t: %d\n"
  86                 "model\t\t: %d\n"
  87                 "model name\t: %s\n",
  88                 n,
  89                 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  90                 c->x86,
  91                 c->x86_model,
  92                 c->x86_model_id[0] ? c->x86_model_id : "unknown");
  93
  94         if (c->x86_mask || c->cpuid_level >= 0)
  95                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  96         else
  97                 seq_printf(m, "stepping\t: unknown\n");
  98
  99         if ( cpu_has(c, X86_FEATURE_TSC) ) {
 100                 unsigned int freq = cpufreq_quick_get(n);
 101                 if (!freq)
 102                         freq = cpu_khz;
 103                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 104                         freq / 1000, (freq % 1000));
 105         }
 106
 107         /* Cache size */
 108         if (c->x86_cache_size >= 0)
 109                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 110 #ifdef CONFIG_X86_HT
 111         if (c->x86_max_cores * smp_num_siblings > 1) {
 112                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
 113                 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[n]));
 114                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
 115                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
 116         }
 117 #endif
 118
 119         /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
 120         fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
 121         seq_printf(m, "fdiv_bug\t: %s\n"
 122                         "hlt_bug\t\t: %s\n"
 123                         "f00f_bug\t: %s\n"
 124                         "coma_bug\t: %s\n"
 125                         "fpu\t\t: %s\n"
 126                         "fpu_exception\t: %s\n"
 127                         "cpuid level\t: %d\n"
 128                         "wp\t\t: %s\n"
 129                         "flags\t\t:",
 130                      c->fdiv_bug ? "yes" : "no",
 131                      c->hlt_works_ok ? "no" : "yes",
 132                      c->f00f_bug ? "yes" : "no",
 133                      c->coma_bug ? "yes" : "no",
 134                      c->hard_math ? "yes" : "no",
 135                      fpu_exception ? "yes" : "no",
 136                      c->cpuid_level,
 137                      c->wp_works_ok ? "yes" : "no");
 138
 139         for ( i = 0 ; i < 32*NCAPINTS ; i++ )
 140                 if ( test_bit(i, c->x86_capability) &&
 141                      x86_cap_flags[i] != NULL )
 142                         seq_printf(m, " %s", x86_cap_flags[i]);
 143
 144         for (i = 0; i < 32; i++)
 145                 if (c->x86_power & (1 << i)) {
 146                         if (i < ARRAY_SIZE(x86_power_flags) &&
 147                             x86_power_flags[i])
 148                                 seq_printf(m, "%s%s",
 149                                            x86_power_flags[i][0]?" ":"",
 150                                            x86_power_flags[i]);
 151                         else
 152                                 seq_printf(m, " [%d]", i);
 153                 }
 154
 155         seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
 156                      c->loops_per_jiffy/(500000/HZ),
 157                      (c->loops_per_jiffy/(5000/HZ)) % 100);
 158
 159         return 0;
 160 }
 161
 162 static void *c_start(struct seq_file *m, loff_t *pos)
 163 {
 164         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
 165 }
 166 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 167 {
 168         ++*pos;
 169         return c_start(m, pos);
 170 }
 171 static void c_stop(struct seq_file *m, void *v)
 172 {
 173 }
 174 struct seq_operations cpuinfo_op = {
 175         .start  = c_start,
 176         .next   = c_next,
 177         .stop   = c_stop,
 178         .show   = show_cpuinfo,
 179 };