aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/cpu/proc.c
blob: 62ac8cb6ba277218eec7cae7c7ef6d474d6406bc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/string.h>
#include <linux/seq_file.h>
#include <linux/cpufreq.h>

/*
 *	Get CPU information for use by the procfs.
 */
static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
			      unsigned int cpu)
{
#ifdef CONFIG_SMP
	if (c->x86_max_cores * smp_num_siblings > 1) {
		seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
		seq_printf(m, "siblings\t: %d\n",
			   cpumask_weight(cpu_core_mask(cpu)));
		seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
		seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
		seq_printf(m, "apicid\t\t: %d\n", c->apicid);
		seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
	}
#endif
}

#ifdef CONFIG_X86_32
static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
{
	/*
	 * We use exception 16 if we have hardware math and we've either seen
	 * it or the CPU claims it is internal
	 */
	int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
	seq_printf(m,
		   "fdiv_bug\t: %s\n"
		   "hlt_bug\t\t: %s\n"
		   "f00f_bug\t: %s\n"
		   "coma_bug\t: %s\n"
		   "fpu\t\t: %s\n"
		   "fpu_exception\t: %s\n"
		   "cpuid level\t: %d\n"
		   "wp\t\t: %s\n",
		   c->fdiv_bug ? "yes" : "no",
		   c->hlt_works_ok ? "no" : "yes",
		   c->f00f_bug ? "yes" : "no",
		   c->coma_bug ? "yes" : "no",
		   c->hard_math ? "yes" : "no",
		   fpu_exception ? "yes" : "no",
		   c->cpuid_level,
		   c->wp_works_ok ? "yes" : "no");
}
#else
static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
{
	seq_printf(m,
		   "fpu\t\t: yes\n"
		   "fpu_exception\t: yes\n"
		   "cpuid level\t: %d\n"
		   "wp\t\t: yes\n",
		   c->cpuid_level);
}
#endif

static int show_cpuinfo(struct seq_file *m, void *v)
{
	struct cpuinfo_x86 *c = v;
	unsigned int cpu = 0;
	int i;

#ifdef CONFIG_SMP
	cpu = c->cpu_index;
#endif
	seq_printf(m, "processor\t: %u\n"
		   "vendor_id\t: %s\n"
		   "cpu family\t: %d\n"
		   "model\t\t: %u\n"
		   "model name\t: %s\n",
		   cpu,
		   c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
		   c->x86,
		   c->x86_model,
		   c->x86_model_id[0] ? c->x86_model_id : "unknown");

	if (c->x86_mask || c->cpuid_level >= 0)
		seq_printf(m, "stepping\t: %d\n", c->x86_mask);
	else
		seq_printf(m, "stepping\t: unknown\n");

	if (cpu_has(c, X86_FEATURE_TSC)) {
		unsigned int freq = cpufreq_quick_get(cpu);

		if (!freq)
			freq = cpu_khz;
		seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
			   freq / 1000, (freq % 1000));
	}

	/* Cache size */
	if (c->x86_cache_size >= 0)
		seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);

	show_cpuinfo_core(m, c, cpu);
	show_cpuinfo_misc(m, c);

	seq_printf(m, "flags\t\t:");
	for (i = 0; i < 32*NCAPINTS; i++)
		if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
			seq_printf(m, " %s", x86_cap_flags[i]);

	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
		   c->loops_per_jiffy/(500000/HZ),
		   (c->loops_per_jiffy/(5000/HZ)) % 100);

#ifdef CONFIG_X86_64
	if (c->x86_tlbsize > 0)
		seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
#endif
	seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
	seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
	seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
		   c->x86_phys_bits, c->x86_virt_bits);

	seq_printf(m, "power management:");
	for (i = 0; i < 32; i++) {
		if (c->x86_power & (1 << i)) {
			if (i < ARRAY_SIZE(x86_power_flags) &&
			    x86_power_flags[i])
				seq_printf(m, "%s%s",
					   x86_power_flags[i][0] ? " " : "",
					   x86_power_flags[i]);
			else
				seq_printf(m, " [%d]", i);
		}
	}

	seq_printf(m, "\n\n");

	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	if (*pos == 0)	/* just in case, cpu 0 is not the first */
		*pos = cpumask_first(cpu_online_mask);
	else
		*pos = cpumask_next(*pos - 1, cpu_online_mask);
	if ((*pos) < nr_cpu_ids)
		return &cpu_data(*pos);
	return NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	(*pos)++;
	return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

const struct seq_operations cpuinfo_op = {
	.start	= c_start,
	.next	= c_next,
	.stop	= c_stop,
	.show	= show_cpuinfo,
};