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