Line data Source code
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
11 : extern const char * const x86_vmx_flags[NVMXINTS*32];
12 : #endif
13 :
14 : /*
15 : * Get CPU information for use by the procfs.
16 : */
17 0 : static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
18 : unsigned int cpu)
19 : {
20 : #ifdef CONFIG_SMP
21 0 : seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
22 0 : seq_printf(m, "siblings\t: %d\n",
23 0 : cpumask_weight(topology_core_cpumask(cpu)));
24 0 : seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
25 0 : seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
26 0 : seq_printf(m, "apicid\t\t: %d\n", c->apicid);
27 0 : seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
28 : #endif
29 0 : }
30 :
31 : #ifdef CONFIG_X86_32
32 : static 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
50 0 : static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
51 : {
52 0 : 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 :
61 0 : static int show_cpuinfo(struct seq_file *m, void *v)
62 : {
63 0 : struct cpuinfo_x86 *c = v;
64 0 : unsigned int cpu;
65 0 : int i;
66 :
67 0 : cpu = c->cpu_index;
68 0 : 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 0 : c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
75 0 : c->x86,
76 0 : c->x86_model,
77 0 : c->x86_model_id[0] ? c->x86_model_id : "unknown");
78 :
79 0 : if (c->x86_stepping || c->cpuid_level >= 0)
80 0 : seq_printf(m, "stepping\t: %d\n", c->x86_stepping);
81 : else
82 0 : seq_puts(m, "stepping\t: unknown\n");
83 0 : if (c->microcode)
84 0 : seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
85 :
86 0 : if (cpu_has(c, X86_FEATURE_TSC)) {
87 0 : unsigned int freq = aperfmperf_get_khz(cpu);
88 :
89 0 : if (!freq)
90 0 : freq = cpufreq_quick_get(cpu);
91 0 : if (!freq)
92 0 : freq = cpu_khz;
93 0 : seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
94 : freq / 1000, (freq % 1000));
95 : }
96 :
97 : /* Cache size */
98 0 : if (c->x86_cache_size)
99 0 : seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size);
100 :
101 0 : show_cpuinfo_core(m, c, cpu);
102 0 : show_cpuinfo_misc(m, c);
103 :
104 0 : seq_puts(m, "flags\t\t:");
105 0 : for (i = 0; i < 32*NCAPINTS; i++)
106 0 : if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
107 0 : seq_printf(m, " %s", x86_cap_flags[i]);
108 :
109 : #ifdef CONFIG_X86_VMX_FEATURE_NAMES
110 0 : if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) {
111 0 : seq_puts(m, "\nvmx flags\t:");
112 0 : for (i = 0; i < 32*NVMXINTS; i++) {
113 0 : if (test_bit(i, (unsigned long *)c->vmx_capability) &&
114 0 : x86_vmx_flags[i] != NULL)
115 0 : seq_printf(m, " %s", x86_vmx_flags[i]);
116 : }
117 : }
118 : #endif
119 :
120 0 : seq_puts(m, "\nbugs\t\t:");
121 0 : for (i = 0; i < 32*NBUGINTS; i++) {
122 0 : unsigned int bug_bit = 32*NCAPINTS + i;
123 :
124 0 : if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
125 0 : seq_printf(m, " %s", x86_bug_flags[i]);
126 : }
127 :
128 0 : seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
129 : c->loops_per_jiffy/(500000/HZ),
130 0 : (c->loops_per_jiffy/(5000/HZ)) % 100);
131 :
132 : #ifdef CONFIG_X86_64
133 0 : if (c->x86_tlbsize > 0)
134 0 : seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
135 : #endif
136 0 : seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
137 0 : seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
138 0 : seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
139 0 : c->x86_phys_bits, c->x86_virt_bits);
140 :
141 0 : seq_puts(m, "power management:");
142 0 : for (i = 0; i < 32; i++) {
143 0 : if (c->x86_power & (1 << i)) {
144 0 : if (i < ARRAY_SIZE(x86_power_flags) &&
145 0 : x86_power_flags[i])
146 0 : seq_printf(m, "%s%s",
147 0 : x86_power_flags[i][0] ? " " : "",
148 : x86_power_flags[i]);
149 : else
150 0 : seq_printf(m, " [%d]", i);
151 : }
152 : }
153 :
154 0 : seq_puts(m, "\n\n");
155 :
156 0 : return 0;
157 : }
158 :
159 0 : static void *c_start(struct seq_file *m, loff_t *pos)
160 : {
161 0 : *pos = cpumask_next(*pos - 1, cpu_online_mask);
162 0 : if ((*pos) < nr_cpu_ids)
163 0 : return &cpu_data(*pos);
164 : return NULL;
165 : }
166 :
167 0 : static void *c_next(struct seq_file *m, void *v, loff_t *pos)
168 : {
169 0 : (*pos)++;
170 0 : return c_start(m, pos);
171 : }
172 :
173 0 : static void c_stop(struct seq_file *m, void *v)
174 : {
175 0 : }
176 :
177 : const struct seq_operations cpuinfo_op = {
178 : .start = c_start,
179 : .next = c_next,
180 : .stop = c_stop,
181 : .show = show_cpuinfo,
182 : };
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