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