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 "constant_tsc", 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
,