5455f3b8b969ad7e55a3f6ca84c926857c2cbf18
[sfrench/cifs-2.6.git] / arch / x86 / kernel / cpu / proc.c
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
7 /*
8  *      Get CPU information for use by the procfs.
9  */
10 static 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",
16                    cpumask_weight(topology_core_cpumask(cpu)));
17         seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
18         seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
19         seq_printf(m, "apicid\t\t: %d\n", c->apicid);
20         seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
21 #endif
22 }
23
24 #ifdef CONFIG_X86_32
25 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
26 {
27         seq_printf(m,
28                    "fdiv_bug\t: %s\n"
29                    "f00f_bug\t: %s\n"
30                    "coma_bug\t: %s\n"
31                    "fpu\t\t: %s\n"
32                    "fpu_exception\t: %s\n"
33                    "cpuid level\t: %d\n"
34                    "wp\t\t: yes\n",
35                    static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
36                    static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
37                    static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
38                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
39                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
40                    c->cpuid_level);
41 }
42 #else
43 static 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
54 static 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_puts(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                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
81                            cpu_khz / 1000, (cpu_khz % 1000));
82
83         /* Cache size */
84         if (c->x86_cache_size >= 0)
85                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
86
87         show_cpuinfo_core(m, c, cpu);
88         show_cpuinfo_misc(m, c);
89
90         seq_puts(m, "flags\t\t:");
91         for (i = 0; i < 32*NCAPINTS; i++)
92                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
93                         seq_printf(m, " %s", x86_cap_flags[i]);
94
95         seq_puts(m, "\nbugs\t\t:");
96         for (i = 0; i < 32*NBUGINTS; i++) {
97                 unsigned int bug_bit = 32*NCAPINTS + i;
98
99                 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
100                         seq_printf(m, " %s", x86_bug_flags[i]);
101         }
102
103         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
104                    c->loops_per_jiffy/(500000/HZ),
105                    (c->loops_per_jiffy/(5000/HZ)) % 100);
106
107 #ifdef CONFIG_X86_64
108         if (c->x86_tlbsize > 0)
109                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
110 #endif
111         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
112         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
113         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
114                    c->x86_phys_bits, c->x86_virt_bits);
115
116         seq_puts(m, "power management:");
117         for (i = 0; i < 32; i++) {
118                 if (c->x86_power & (1 << i)) {
119                         if (i < ARRAY_SIZE(x86_power_flags) &&
120                             x86_power_flags[i])
121                                 seq_printf(m, "%s%s",
122                                            x86_power_flags[i][0] ? " " : "",
123                                            x86_power_flags[i]);
124                         else
125                                 seq_printf(m, " [%d]", i);
126                 }
127         }
128
129         seq_puts(m, "\n\n");
130
131         return 0;
132 }
133
134 static void *c_start(struct seq_file *m, loff_t *pos)
135 {
136         *pos = cpumask_next(*pos - 1, cpu_online_mask);
137         if ((*pos) < nr_cpu_ids)
138                 return &cpu_data(*pos);
139         return NULL;
140 }
141
142 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
143 {
144         (*pos)++;
145         return c_start(m, pos);
146 }
147
148 static void c_stop(struct seq_file *m, void *v)
149 {
150 }
151
152 const struct seq_operations cpuinfo_op = {
153         .start  = c_start,
154         .next   = c_next,
155         .stop   = c_stop,
156         .show   = show_cpuinfo,
157 };