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
   7 /*
   8  *      Get CPU information for use by the procfs.
   9  */
  10 static int show_cpuinfo(struct seq_file *m, void *v)
  11 {
  12         /*
  13          * These flag bits must match the definitions in <asm/cpufeature.h>.
  14          * NULL means this bit is undefined or reserved; either way it doesn't
  15          * have meaning as far as Linux is concerned.  Note that it's important
  16          * to realize there is a difference between this table and CPUID -- if
  17          * applications want to get the raw CPUID data, they should access
  18          * /dev/cpu/<cpu_nr>/cpuid instead.
  19          */
  20         static char *x86_cap_flags[] = {
  21                 /* Intel-defined */
  22                 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
  23                 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
  24                 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
  25                 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
  26
  27                 /* AMD-defined */
  28                 "pni", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  29                 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
  30                 NULL, NULL, NULL, "mp", "nx", NULL, "mmxext", NULL,
  31                 NULL, "fxsr_opt", NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
  32
  33                 /* Transmeta-defined */
  34                 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
  35                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  36                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  37                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  38
  39                 /* Other (Linux-defined) */
  40                 "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
  41                 NULL, NULL, NULL, NULL,
  42                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  43                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  44                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  45
  46                 /* Intel-defined (#2) */
  47                 "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "est",
  48                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
  49                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  50                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  51
  52                 /* VIA/Cyrix/Centaur-defined */
  53                 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
  54                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  55                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  56                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  57
  58                 /* AMD-defined (#2) */
  59                 "lahf_lm", "cmp_legacy", NULL, NULL, NULL, NULL, NULL, NULL,
  60                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  61                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  62                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  63         };
  64         struct cpuinfo_x86 *c = v;
  65         int i, n = c - cpu_data;
  66         int fpu_exception;
  67
  68 #ifdef CONFIG_SMP
  69         if (!cpu_online(n))
  70                 return 0;
  71 #endif
  72         seq_printf(m, "processor\t: %d\n"
  73                 "vendor_id\t: %s\n"
  74                 "cpu family\t: %d\n"
  75                 "model\t\t: %d\n"
  76                 "model name\t: %s\n",
  77                 n,
  78                 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
  79                 c->x86,
  80                 c->x86_model,
  81                 c->x86_model_id[0] ? c->x86_model_id : "unknown");
  82
  83         if (c->x86_mask || c->cpuid_level >= 0)
  84                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
  85         else
  86                 seq_printf(m, "stepping\t: unknown\n");
  87
  88         if ( cpu_has(c, X86_FEATURE_TSC) ) {
  89                 seq_printf(m, "cpu MHz\t\t: %lu.%03lu\n",
  90                         cpu_khz / 1000, (cpu_khz % 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 #ifdef CONFIG_X86_HT
  97         if (c->x86_num_cores * smp_num_siblings > 1) {
  98                 seq_printf(m, "physical id\t: %d\n", phys_proc_id[n]);
  99                 seq_printf(m, "siblings\t: %d\n",
 100                                 c->x86_num_cores * smp_num_siblings);
 101                 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[n]);
 102                 seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
 103         }
 104 #endif
 105
 106         /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
 107         fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
 108         seq_printf(m, "fdiv_bug\t: %s\n"
 109                         "hlt_bug\t\t: %s\n"
 110                         "f00f_bug\t: %s\n"
 111                         "coma_bug\t: %s\n"
 112                         "fpu\t\t: %s\n"
 113                         "fpu_exception\t: %s\n"
 114                         "cpuid level\t: %d\n"
 115                         "wp\t\t: %s\n"
 116                         "flags\t\t:",
 117                      c->fdiv_bug ? "yes" : "no",
 118                      c->hlt_works_ok ? "no" : "yes",
 119                      c->f00f_bug ? "yes" : "no",
 120                      c->coma_bug ? "yes" : "no",
 121                      c->hard_math ? "yes" : "no",
 122                      fpu_exception ? "yes" : "no",
 123                      c->cpuid_level,
 124                      c->wp_works_ok ? "yes" : "no");
 125
 126         for ( i = 0 ; i < 32*NCAPINTS ; i++ )
 127                 if ( test_bit(i, c->x86_capability) &&
 128                      x86_cap_flags[i] != NULL )
 129                         seq_printf(m, " %s", x86_cap_flags[i]);
 130
 131         seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
 132                      c->loops_per_jiffy/(500000/HZ),
 133                      (c->loops_per_jiffy/(5000/HZ)) % 100);
 134
 135         return 0;
 136 }
 137
 138 static void *c_start(struct seq_file *m, loff_t *pos)
 139 {
 140         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
 141 }
 142 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 143 {
 144         ++*pos;
 145         return c_start(m, pos);
 146 }
 147 static void c_stop(struct seq_file *m, void *v)
 148 {
 149 }
 150 struct seq_operations cpuinfo_op = {
 151         .start  = c_start,
 152         .next   = c_next,
 153         .stop   = c_stop,
 154         .show   = show_cpuinfo,
 155 };