1#include <linux/smp.h>
2#include <linux/timex.h>
3#include <linux/string.h>
4#include <linux/seq_file.h>
5#include <linux/cpufreq.h>
6
7/*
8 *	Get CPU information for use by the procfs.
9 */
10static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
11			      unsigned int cpu)
12{
13#ifdef CONFIG_SMP
14	seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
15	seq_printf(m, "siblings\t: %d\n",
16		   cpumask_weight(topology_core_cpumask(cpu)));
17	seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
18	seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
19	seq_printf(m, "apicid\t\t: %d\n", c->apicid);
20	seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
21#endif
22}
23
24#ifdef CONFIG_X86_32
25static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
26{
27	seq_printf(m,
28		   "fdiv_bug\t: %s\n"
29		   "f00f_bug\t: %s\n"
30		   "coma_bug\t: %s\n"
31		   "fpu\t\t: %s\n"
32		   "fpu_exception\t: %s\n"
33		   "cpuid level\t: %d\n"
34		   "wp\t\t: %s\n",
35		   static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
36		   static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
37		   static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
38		   static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
39		   static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
40		   c->cpuid_level,
41		   c->wp_works_ok ? "yes" : "no");
42}
43#else
44static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
45{
46	seq_printf(m,
47		   "fpu\t\t: yes\n"
48		   "fpu_exception\t: yes\n"
49		   "cpuid level\t: %d\n"
50		   "wp\t\t: yes\n",
51		   c->cpuid_level);
52}
53#endif
54
55static int show_cpuinfo(struct seq_file *m, void *v)
56{
57	struct cpuinfo_x86 *c = v;
58	unsigned int cpu;
59	int i;
60
61	cpu = c->cpu_index;
62	seq_printf(m, "processor\t: %u\n"
63		   "vendor_id\t: %s\n"
64		   "cpu family\t: %d\n"
65		   "model\t\t: %u\n"
66		   "model name\t: %s\n",
67		   cpu,
68		   c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
69		   c->x86,
70		   c->x86_model,
71		   c->x86_model_id[0] ? c->x86_model_id : "unknown");
72
73	if (c->x86_mask || c->cpuid_level >= 0)
74		seq_printf(m, "stepping\t: %d\n", c->x86_mask);
75	else
76		seq_puts(m, "stepping\t: unknown\n");
77	if (c->microcode)
78		seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
79
80	if (cpu_has(c, X86_FEATURE_TSC)) {
81		unsigned int freq = cpufreq_quick_get(cpu);
82
83		if (!freq)
84			freq = cpu_khz;
85		seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
86			   freq / 1000, (freq % 1000));
87	}
88
89	/* Cache size */
90	if (c->x86_cache_size >= 0)
91		seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
92
93	show_cpuinfo_core(m, c, cpu);
94	show_cpuinfo_misc(m, c);
95
96	seq_puts(m, "flags\t\t:");
97	for (i = 0; i < 32*NCAPINTS; i++)
98		if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
99			seq_printf(m, " %s", x86_cap_flags[i]);
100
101	seq_puts(m, "\nbugs\t\t:");
102	for (i = 0; i < 32*NBUGINTS; i++) {
103		unsigned int bug_bit = 32*NCAPINTS + i;
104
105		if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
106			seq_printf(m, " %s", x86_bug_flags[i]);
107	}
108
109	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
110		   c->loops_per_jiffy/(500000/HZ),
111		   (c->loops_per_jiffy/(5000/HZ)) % 100);
112
113#ifdef CONFIG_X86_64
114	if (c->x86_tlbsize > 0)
115		seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
116#endif
117	seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
118	seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
119	seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
120		   c->x86_phys_bits, c->x86_virt_bits);
121
122	seq_puts(m, "power management:");
123	for (i = 0; i < 32; i++) {
124		if (c->x86_power & (1 << i)) {
125			if (i < ARRAY_SIZE(x86_power_flags) &&
126			    x86_power_flags[i])
127				seq_printf(m, "%s%s",
128					   x86_power_flags[i][0] ? " " : "",
129					   x86_power_flags[i]);
130			else
131				seq_printf(m, " [%d]", i);
132		}
133	}
134
135	seq_puts(m, "\n\n");
136
137	return 0;
138}
139
140static void *c_start(struct seq_file *m, loff_t *pos)
141{
142	*pos = cpumask_next(*pos - 1, cpu_online_mask);
143	if ((*pos) < nr_cpu_ids)
144		return &cpu_data(*pos);
145	return NULL;
146}
147
148static void *c_next(struct seq_file *m, void *v, loff_t *pos)
149{
150	(*pos)++;
151	return c_start(m, pos);
152}
153
154static void c_stop(struct seq_file *m, void *v)
155{
156}
157
158const struct seq_operations cpuinfo_op = {
159	.start	= c_start,
160	.next	= c_next,
161	.stop	= c_stop,
162	.show	= show_cpuinfo,
163};
164