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", "pdpe1gb", "rdtscp", 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", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
  50                 NULL, NULL, "dca", NULL, NULL, NULL, NULL, "popcnt",
  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", "extapic", "cr8legacy", "abm",
  61                 "sse4a", "misalignsse",
  62                 "3dnowprefetch", "osvw", "ibs", NULL, NULL, NULL, NULL, NULL,
  63                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  64                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  65         };
  66         static const char * const x86_power_flags[] = {
  67                 "ts",   /* temperature sensor */
  68                 "fid",  /* frequency id control */
  69                 "vid",  /* voltage id control */
  70                 "ttp",  /* thermal trip */
  71                 "tm",
  72                 "stc",
  73                 "100mhzsteps",
  74                 "hwpstate",
  75                 "",     /* constant_tsc - moved to flags */
  76                 /* nothing */
  77         };
  78         struct cpuinfo_x86 *c = v;
  79         int i, n = c - cpu_data;
  80         int fpu_exception;
  81
  82 #ifdef CONFIG_SMP
  83         if (!cpu_online(n))
  84                 return 0;
  85 #endif
  86         seq_printf(m, "processor\t: %d\n"
  87                 "vendor_id\t: %s\n"
  88                 "cpu family\t: %d\n"
  89                 "model\t\t: %d\n"
  90                 "model name\t: %s\n",
  91                 n,
  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(n);
 104                 if (!freq)
 105                         freq = cpu_khz;
 106                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 107                         freq / 1000, (freq % 1000));
 108         }
 109
 110         /* Cache size */
 111         if (c->x86_cache_size >= 0)
 112                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 113 #ifdef CONFIG_X86_HT
 114         if (c->x86_max_cores * smp_num_siblings > 1) {
 115                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
 116                 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[n]));
 117                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
 118                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
 119         }
 120 #endif
 121
 122         /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
 123         fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
 124         seq_printf(m, "fdiv_bug\t: %s\n"
 125                         "hlt_bug\t\t: %s\n"
 126                         "f00f_bug\t: %s\n"
 127                         "coma_bug\t: %s\n"
 128                         "fpu\t\t: %s\n"
 129                         "fpu_exception\t: %s\n"
 130                         "cpuid level\t: %d\n"
 131                         "wp\t\t: %s\n"
 132                         "flags\t\t:",
 133                      c->fdiv_bug ? "yes" : "no",
 134                      c->hlt_works_ok ? "no" : "yes",
 135                      c->f00f_bug ? "yes" : "no",
 136                      c->coma_bug ? "yes" : "no",
 137                      c->hard_math ? "yes" : "no",
 138                      fpu_exception ? "yes" : "no",
 139                      c->cpuid_level,
 140                      c->wp_works_ok ? "yes" : "no");
 141
 142         for ( i = 0 ; i < 32*NCAPINTS ; i++ )
 143                 if ( test_bit(i, c->x86_capability) &&
 144                      x86_cap_flags[i] != NULL )
 145                         seq_printf(m, " %s", x86_cap_flags[i]);
 146
 147         for (i = 0; i < 32; i++)
 148                 if (c->x86_power & (1 << i)) {
 149                         if (i < ARRAY_SIZE(x86_power_flags) &&
 150                             x86_power_flags[i])
 151                                 seq_printf(m, "%s%s",
 152                                            x86_power_flags[i][0]?" ":"",
 153                                            x86_power_flags[i]);
 154                         else
 155                                 seq_printf(m, " [%d]", i);
 156                 }
 157
 158         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 159                      c->loops_per_jiffy/(500000/HZ),
 160                      (c->loops_per_jiffy/(5000/HZ)) % 100);
 161         seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);
 162
 163         return 0;
 164 }
 165
 166 static void *c_start(struct seq_file *m, loff_t *pos)
 167 {
 168         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
 169 }
 170 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 171 {
 172         ++*pos;
 173         return c_start(m, pos);
 174 }
 175 static void c_stop(struct seq_file *m, void *v)
 176 {
 177 }
 178 struct seq_operations cpuinfo_op = {
 179         .start  = c_start,
 180         .next   = c_next,
 181         .stop   = c_stop,
 182         .show   = show_cpuinfo,
 183 };