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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | #include <linux/smp.h> |
3 | #include <linux/timex.h> | |
4 | #include <linux/string.h> | |
1da177e4 | 5 | #include <linux/seq_file.h> |
890da9cf | 6 | #include <linux/cpufreq.h> |
1da177e4 LT |
7 | |
8 | /* | |
9 | * Get CPU information for use by the procfs. | |
10 | */ | |
a967ceac HS |
11 | static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c, |
12 | unsigned int cpu) | |
13 | { | |
327f4387 | 14 | #ifdef CONFIG_SMP |
a477c859 | 15 | seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); |
7d79a7bd BG |
16 | seq_printf(m, "siblings\t: %d\n", |
17 | cpumask_weight(topology_core_cpumask(cpu))); | |
a477c859 HD |
18 | seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id); |
19 | seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); | |
20 | seq_printf(m, "apicid\t\t: %d\n", c->apicid); | |
21 | seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid); | |
a967ceac HS |
22 | #endif |
23 | } | |
24 | ||
327f4387 | 25 | #ifdef CONFIG_X86_32 |
a967ceac HS |
26 | static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) |
27 | { | |
a967ceac HS |
28 | seq_printf(m, |
29 | "fdiv_bug\t: %s\n" | |
a967ceac HS |
30 | "f00f_bug\t: %s\n" |
31 | "coma_bug\t: %s\n" | |
32 | "fpu\t\t: %s\n" | |
33 | "fpu_exception\t: %s\n" | |
34 | "cpuid level\t: %d\n" | |
6415813b | 35 | "wp\t\t: yes\n", |
93a829e8 | 36 | static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no", |
e2604b49 | 37 | static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no", |
c5b41a67 | 38 | static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no", |
60e019eb PA |
39 | static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no", |
40 | static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no", | |
6415813b | 41 | c->cpuid_level); |
a967ceac | 42 | } |
2aef7720 | 43 | #else |
2aef7720 HS |
44 | static 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 | |
a967ceac | 54 | |
1da177e4 LT |
55 | static int show_cpuinfo(struct seq_file *m, void *v) |
56 | { | |
1da177e4 | 57 | struct cpuinfo_x86 *c = v; |
141168c3 | 58 | unsigned int cpu; |
a967ceac | 59 | int i; |
1da177e4 | 60 | |
a967ceac | 61 | cpu = c->cpu_index; |
a967ceac HS |
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"); | |
1da177e4 LT |
72 | |
73 | if (c->x86_mask || c->cpuid_level >= 0) | |
74 | seq_printf(m, "stepping\t: %d\n", c->x86_mask); | |
75 | else | |
3736708f | 76 | seq_puts(m, "stepping\t: unknown\n"); |
506ed6b5 | 77 | if (c->microcode) |
881e23e5 | 78 | seq_printf(m, "microcode\t: 0x%x\n", c->microcode); |
1da177e4 | 79 | |
890da9cf | 80 | if (cpu_has(c, X86_FEATURE_TSC)) { |
941f5f0f | 81 | unsigned int freq = arch_freq_get_on_cpu(cpu); |
890da9cf | 82 | |
941f5f0f RW |
83 | if (!freq) |
84 | freq = cpufreq_quick_get(cpu); | |
890da9cf LT |
85 | if (!freq) |
86 | freq = cpu_khz; | |
a3a255e7 | 87 | seq_printf(m, "cpu MHz\t\t: %u.%03u\n", |
890da9cf LT |
88 | freq / 1000, (freq % 1000)); |
89 | } | |
1da177e4 LT |
90 | |
91 | /* Cache size */ | |
92 | if (c->x86_cache_size >= 0) | |
93 | seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); | |
a967ceac HS |
94 | |
95 | show_cpuinfo_core(m, c, cpu); | |
96 | show_cpuinfo_misc(m, c); | |
97 | ||
3736708f | 98 | seq_puts(m, "flags\t\t:"); |
a967ceac HS |
99 | for (i = 0; i < 32*NCAPINTS; i++) |
100 | if (cpu_has(c, i) && x86_cap_flags[i] != NULL) | |
1da177e4 LT |
101 | seq_printf(m, " %s", x86_cap_flags[i]); |
102 | ||
3736708f | 103 | seq_puts(m, "\nbugs\t\t:"); |
80a208bd BP |
104 | for (i = 0; i < 32*NBUGINTS; i++) { |
105 | unsigned int bug_bit = 32*NCAPINTS + i; | |
106 | ||
107 | if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i]) | |
108 | seq_printf(m, " %s", x86_bug_flags[i]); | |
109 | } | |
110 | ||
f84c3a42 HS |
111 | seq_printf(m, "\nbogomips\t: %lu.%02lu\n", |
112 | c->loops_per_jiffy/(500000/HZ), | |
113 | (c->loops_per_jiffy/(5000/HZ)) % 100); | |
2aef7720 HS |
114 | |
115 | #ifdef CONFIG_X86_64 | |
116 | if (c->x86_tlbsize > 0) | |
117 | seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); | |
118 | #endif | |
f84c3a42 | 119 | seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); |
2aef7720 HS |
120 | seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); |
121 | seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", | |
122 | c->x86_phys_bits, c->x86_virt_bits); | |
f84c3a42 | 123 | |
3736708f | 124 | seq_puts(m, "power management:"); |
f84c3a42 | 125 | for (i = 0; i < 32; i++) { |
3f98bc49 AK |
126 | if (c->x86_power & (1 << i)) { |
127 | if (i < ARRAY_SIZE(x86_power_flags) && | |
128 | x86_power_flags[i]) | |
129 | seq_printf(m, "%s%s", | |
8bdbd962 | 130 | x86_power_flags[i][0] ? " " : "", |
3f98bc49 AK |
131 | x86_power_flags[i]); |
132 | else | |
133 | seq_printf(m, " [%d]", i); | |
134 | } | |
f84c3a42 | 135 | } |
3f98bc49 | 136 | |
3736708f | 137 | seq_puts(m, "\n\n"); |
3dd9d514 | 138 | |
1da177e4 LT |
139 | return 0; |
140 | } | |
141 | ||
142 | static void *c_start(struct seq_file *m, loff_t *pos) | |
143 | { | |
dec08a83 | 144 | *pos = cpumask_next(*pos - 1, cpu_online_mask); |
bc8bcc79 | 145 | if ((*pos) < nr_cpu_ids) |
92cb7612 MT |
146 | return &cpu_data(*pos); |
147 | return NULL; | |
1da177e4 | 148 | } |
a967ceac | 149 | |
1da177e4 LT |
150 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
151 | { | |
bc8bcc79 | 152 | (*pos)++; |
1da177e4 LT |
153 | return c_start(m, pos); |
154 | } | |
a967ceac | 155 | |
1da177e4 LT |
156 | static void c_stop(struct seq_file *m, void *v) |
157 | { | |
158 | } | |
a967ceac | 159 | |
8a45eb31 | 160 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
161 | .start = c_start, |
162 | .next = c_next, | |
163 | .stop = c_stop, | |
164 | .show = show_cpuinfo, | |
165 | }; |