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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/smp.h>
3#include <linux/timex.h>
4#include <linux/string.h>
5#include <linux/seq_file.h>
6#include <linux/cpufreq.h>
7
8#include "cpu.h"
9
10#ifdef CONFIG_X86_VMX_FEATURE_NAMES
11extern const char * const x86_vmx_flags[NVMXINTS*32];
12#endif
13
14/*
15 * Get CPU information for use by the procfs.
16 */
17static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
18 unsigned int cpu)
19{
20#ifdef CONFIG_SMP
21 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
22 seq_printf(m, "siblings\t: %d\n",
23 cpumask_weight(topology_core_cpumask(cpu)));
24 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
25 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
26 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
27 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
28#endif
29}
30
31#ifdef CONFIG_X86_32
32static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
33{
34 seq_printf(m,
35 "fdiv_bug\t: %s\n"
36 "f00f_bug\t: %s\n"
37 "coma_bug\t: %s\n"
38 "fpu\t\t: %s\n"
39 "fpu_exception\t: %s\n"
40 "cpuid level\t: %d\n"
41 "wp\t\t: yes\n",
42 boot_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
43 boot_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
44 boot_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
45 boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
46 boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
47 c->cpuid_level);
48}
49#else
50static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
51{
52 seq_printf(m,
53 "fpu\t\t: yes\n"
54 "fpu_exception\t: yes\n"
55 "cpuid level\t: %d\n"
56 "wp\t\t: yes\n",
57 c->cpuid_level);
58}
59#endif
60
61static int show_cpuinfo(struct seq_file *m, void *v)
62{
63 struct cpuinfo_x86 *c = v;
64 unsigned int cpu;
65 int i;
66
67 cpu = c->cpu_index;
68 seq_printf(m, "processor\t: %u\n"
69 "vendor_id\t: %s\n"
70 "cpu family\t: %d\n"
71 "model\t\t: %u\n"
72 "model name\t: %s\n",
73 cpu,
74 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
75 c->x86,
76 c->x86_model,
77 c->x86_model_id[0] ? c->x86_model_id : "unknown");
78
79 if (c->x86_stepping || c->cpuid_level >= 0)
80 seq_printf(m, "stepping\t: %d\n", c->x86_stepping);
81 else
82 seq_puts(m, "stepping\t: unknown\n");
83 if (c->microcode)
84 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
85
86 if (cpu_has(c, X86_FEATURE_TSC)) {
87 unsigned int freq = aperfmperf_get_khz(cpu);
88
89 if (!freq)
90 freq = cpufreq_quick_get(cpu);
91 if (!freq)
92 freq = cpu_khz;
93 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
94 freq / 1000, (freq % 1000));
95 }
96
97 /* Cache size */
98 if (c->x86_cache_size)
99 seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size);
100
101 show_cpuinfo_core(m, c, cpu);
102 show_cpuinfo_misc(m, c);
103
104 seq_puts(m, "flags\t\t:");
105 for (i = 0; i < 32*NCAPINTS; i++)
106 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
107 seq_printf(m, " %s", x86_cap_flags[i]);
108
109#ifdef CONFIG_X86_VMX_FEATURE_NAMES
110 if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) {
111 seq_puts(m, "\nvmx flags\t:");
112 for (i = 0; i < 32*NVMXINTS; i++) {
113 if (test_bit(i, (unsigned long *)c->vmx_capability) &&
114 x86_vmx_flags[i] != NULL)
115 seq_printf(m, " %s", x86_vmx_flags[i]);
116 }
117 }
118#endif
119
120 seq_puts(m, "\nbugs\t\t:");
121 for (i = 0; i < 32*NBUGINTS; i++) {
122 unsigned int bug_bit = 32*NCAPINTS + i;
123
124 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
125 seq_printf(m, " %s", x86_bug_flags[i]);
126 }
127
128 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
129 c->loops_per_jiffy/(500000/HZ),
130 (c->loops_per_jiffy/(5000/HZ)) % 100);
131
132#ifdef CONFIG_X86_64
133 if (c->x86_tlbsize > 0)
134 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
135#endif
136 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
137 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
138 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
139 c->x86_phys_bits, c->x86_virt_bits);
140
141 seq_puts(m, "power management:");
142 for (i = 0; i < 32; i++) {
143 if (c->x86_power & (1 << i)) {
144 if (i < ARRAY_SIZE(x86_power_flags) &&
145 x86_power_flags[i])
146 seq_printf(m, "%s%s",
147 x86_power_flags[i][0] ? " " : "",
148 x86_power_flags[i]);
149 else
150 seq_printf(m, " [%d]", i);
151 }
152 }
153
154 seq_puts(m, "\n\n");
155
156 return 0;
157}
158
159static void *c_start(struct seq_file *m, loff_t *pos)
160{
161 *pos = cpumask_next(*pos - 1, cpu_online_mask);
162 if ((*pos) < nr_cpu_ids)
163 return &cpu_data(*pos);
164 return NULL;
165}
166
167static void *c_next(struct seq_file *m, void *v, loff_t *pos)
168{
169 (*pos)++;
170 return c_start(m, pos);
171}
172
173static void c_stop(struct seq_file *m, void *v)
174{
175}
176
177const struct seq_operations cpuinfo_op = {
178 .start = c_start,
179 .next = c_next,
180 .stop = c_stop,
181 .show = show_cpuinfo,
182};
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_printf(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_printf(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_printf(m, "\nbogomips\t: %lu.%02lu\n",
101 c->loops_per_jiffy/(500000/HZ),
102 (c->loops_per_jiffy/(5000/HZ)) % 100);
103
104#ifdef CONFIG_X86_64
105 if (c->x86_tlbsize > 0)
106 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
107#endif
108 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
109 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
110 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
111 c->x86_phys_bits, c->x86_virt_bits);
112
113 seq_printf(m, "power management:");
114 for (i = 0; i < 32; i++) {
115 if (c->x86_power & (1 << i)) {
116 if (i < ARRAY_SIZE(x86_power_flags) &&
117 x86_power_flags[i])
118 seq_printf(m, "%s%s",
119 x86_power_flags[i][0] ? " " : "",
120 x86_power_flags[i]);
121 else
122 seq_printf(m, " [%d]", i);
123 }
124 }
125
126 seq_printf(m, "\n\n");
127
128 return 0;
129}
130
131static void *c_start(struct seq_file *m, loff_t *pos)
132{
133 *pos = cpumask_next(*pos - 1, cpu_online_mask);
134 if ((*pos) < nr_cpu_ids)
135 return &cpu_data(*pos);
136 return NULL;
137}
138
139static void *c_next(struct seq_file *m, void *v, loff_t *pos)
140{
141 (*pos)++;
142 return c_start(m, pos);
143}
144
145static void c_stop(struct seq_file *m, void *v)
146{
147}
148
149const struct seq_operations cpuinfo_op = {
150 .start = c_start,
151 .next = c_next,
152 .stop = c_stop,
153 .show = show_cpuinfo,
154};