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>
9 * Get CPU information for use by the procfs.
11 static int show_cpuinfo(struct seq_file *m, void *v)
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.
21 static char *x86_cap_flags[] = {
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",
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", NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
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,
40 /* Other (Linux-defined) */
41 "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
42 NULL, NULL, NULL, NULL,
43 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
44 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
45 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
47 /* Intel-defined (#2) */
48 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", NULL, "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,
53 /* VIA/Cyrix/Centaur-defined */
54 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
55 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
56 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
57 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
59 /* AMD-defined (#2) */
60 "lahf_lm", "cmp_legacy", 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 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
65 struct cpuinfo_x86 *c = v;
66 int i, n = c - cpu_data;
73 seq_printf(m, "processor\t: %d\n"
79 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
82 c->x86_model_id[0] ? c->x86_model_id : "unknown");
84 if (c->x86_mask || c->cpuid_level >= 0)
85 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
87 seq_printf(m, "stepping\t: unknown\n");
89 if ( cpu_has(c, X86_FEATURE_TSC) ) {
90 unsigned int freq = cpufreq_quick_get(n);
93 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
94 freq / 1000, (freq % 1000));
98 if (c->x86_cache_size >= 0)
99 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
101 if (c->x86_max_cores * smp_num_siblings > 1) {
102 seq_printf(m, "physical id\t: %d\n", phys_proc_id[n]);
103 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[n]));
104 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[n]);
105 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
109 /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
110 fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
111 seq_printf(m, "fdiv_bug\t: %s\n"
116 "fpu_exception\t: %s\n"
117 "cpuid level\t: %d\n"
120 c->fdiv_bug ? "yes" : "no",
121 c->hlt_works_ok ? "no" : "yes",
122 c->f00f_bug ? "yes" : "no",
123 c->coma_bug ? "yes" : "no",
124 c->hard_math ? "yes" : "no",
125 fpu_exception ? "yes" : "no",
127 c->wp_works_ok ? "yes" : "no");
129 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
130 if ( test_bit(i, c->x86_capability) &&
131 x86_cap_flags[i] != NULL )
132 seq_printf(m, " %s", x86_cap_flags[i]);
134 seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
135 c->loops_per_jiffy/(500000/HZ),
136 (c->loops_per_jiffy/(5000/HZ)) % 100);
141 static void *c_start(struct seq_file *m, loff_t *pos)
143 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
145 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
148 return c_start(m, pos);
150 static void c_stop(struct seq_file *m, void *v)
153 struct seq_operations cpuinfo_op = {
157 .show = show_cpuinfo,