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 */
show_cpuinfo_core(struct seq_file * m,struct cpuinfo_x86 * c,unsigned int cpu)17 static 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
show_cpuinfo_misc(struct seq_file * m,struct cpuinfo_x86 * c)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
show_cpuinfo_misc(struct seq_file * m,struct cpuinfo_x86 * c)50 static 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
show_cpuinfo(struct seq_file * m,void * v)61 static 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 = arch_freq_get_on_cpu(cpu);
88
89 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", freq / 1000, (freq % 1000));
90 }
91
92 /* Cache size */
93 if (c->x86_cache_size)
94 seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size);
95
96 show_cpuinfo_core(m, c, cpu);
97 show_cpuinfo_misc(m, c);
98
99 seq_puts(m, "flags\t\t:");
100 for (i = 0; i < 32*NCAPINTS; i++)
101 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
102 seq_printf(m, " %s", x86_cap_flags[i]);
103
104 #ifdef CONFIG_X86_VMX_FEATURE_NAMES
105 if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) {
106 seq_puts(m, "\nvmx flags\t:");
107 for (i = 0; i < 32*NVMXINTS; i++) {
108 if (test_bit(i, (unsigned long *)c->vmx_capability) &&
109 x86_vmx_flags[i] != NULL)
110 seq_printf(m, " %s", x86_vmx_flags[i]);
111 }
112 }
113 #endif
114
115 seq_puts(m, "\nbugs\t\t:");
116 for (i = 0; i < 32*NBUGINTS; i++) {
117 unsigned int bug_bit = 32*NCAPINTS + i;
118
119 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
120 seq_printf(m, " %s", x86_bug_flags[i]);
121 }
122
123 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
124 c->loops_per_jiffy/(500000/HZ),
125 (c->loops_per_jiffy/(5000/HZ)) % 100);
126
127 #ifdef CONFIG_X86_64
128 if (c->x86_tlbsize > 0)
129 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
130 #endif
131 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
132 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
133 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
134 c->x86_phys_bits, c->x86_virt_bits);
135
136 seq_puts(m, "power management:");
137 for (i = 0; i < 32; i++) {
138 if (c->x86_power & (1 << i)) {
139 if (i < ARRAY_SIZE(x86_power_flags) &&
140 x86_power_flags[i])
141 seq_printf(m, "%s%s",
142 x86_power_flags[i][0] ? " " : "",
143 x86_power_flags[i]);
144 else
145 seq_printf(m, " [%d]", i);
146 }
147 }
148
149 seq_puts(m, "\n\n");
150
151 return 0;
152 }
153
c_start(struct seq_file * m,loff_t * pos)154 static void *c_start(struct seq_file *m, loff_t *pos)
155 {
156 *pos = cpumask_next(*pos - 1, cpu_online_mask);
157 if ((*pos) < nr_cpu_ids)
158 return &cpu_data(*pos);
159 return NULL;
160 }
161
c_next(struct seq_file * m,void * v,loff_t * pos)162 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
163 {
164 (*pos)++;
165 return c_start(m, pos);
166 }
167
c_stop(struct seq_file * m,void * v)168 static void c_stop(struct seq_file *m, void *v)
169 {
170 }
171
172 const struct seq_operations cpuinfo_op = {
173 .start = c_start,
174 .next = c_next,
175 .stop = c_stop,
176 .show = show_cpuinfo,
177 };
178