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Linux/arch/x86/kernel/cpu/proc.c

  1 #include <linux/smp.h>
  2 #include <linux/timex.h>
  3 #include <linux/string.h>
  4 #include <linux/seq_file.h>
  5 #include <linux/cpufreq.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: %s\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                    c->wp_works_ok ? "yes" : "no");
 42 }
 43 #else
 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
 54 
 55 static int show_cpuinfo(struct seq_file *m, void *v)
 56 {
 57         struct cpuinfo_x86 *c = v;
 58         unsigned int cpu;
 59         int i;
 60 
 61         cpu = c->cpu_index;
 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");
 72 
 73         if (c->x86_mask || c->cpuid_level >= 0)
 74                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
 75         else
 76                 seq_puts(m, "stepping\t: unknown\n");
 77         if (c->microcode)
 78                 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
 79 
 80         if (cpu_has(c, X86_FEATURE_TSC)) {
 81                 unsigned int freq = cpufreq_quick_get(cpu);
 82 
 83                 if (!freq)
 84                         freq = cpu_khz;
 85                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 86                            freq / 1000, (freq % 1000));
 87         }
 88 
 89         /* Cache size */
 90         if (c->x86_cache_size >= 0)
 91                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 92 
 93         show_cpuinfo_core(m, c, cpu);
 94         show_cpuinfo_misc(m, c);
 95 
 96         seq_puts(m, "flags\t\t:");
 97         for (i = 0; i < 32*NCAPINTS; i++)
 98                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 99                         seq_printf(m, " %s", x86_cap_flags[i]);
100 
101         seq_puts(m, "\nbugs\t\t:");
102         for (i = 0; i < 32*NBUGINTS; i++) {
103                 unsigned int bug_bit = 32*NCAPINTS + i;
104 
105                 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
106                         seq_printf(m, " %s", x86_bug_flags[i]);
107         }
108 
109         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
110                    c->loops_per_jiffy/(500000/HZ),
111                    (c->loops_per_jiffy/(5000/HZ)) % 100);
112 
113 #ifdef CONFIG_X86_64
114         if (c->x86_tlbsize > 0)
115                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
116 #endif
117         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
118         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
119         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
120                    c->x86_phys_bits, c->x86_virt_bits);
121 
122         seq_puts(m, "power management:");
123         for (i = 0; i < 32; i++) {
124                 if (c->x86_power & (1 << i)) {
125                         if (i < ARRAY_SIZE(x86_power_flags) &&
126                             x86_power_flags[i])
127                                 seq_printf(m, "%s%s",
128                                            x86_power_flags[i][0] ? " " : "",
129                                            x86_power_flags[i]);
130                         else
131                                 seq_printf(m, " [%d]", i);
132                 }
133         }
134 
135         seq_puts(m, "\n\n");
136 
137         return 0;
138 }
139 
140 static void *c_start(struct seq_file *m, loff_t *pos)
141 {
142         *pos = cpumask_next(*pos - 1, cpu_online_mask);
143         if ((*pos) < nr_cpu_ids)
144                 return &cpu_data(*pos);
145         return NULL;
146 }
147 
148 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
149 {
150         (*pos)++;
151         return c_start(m, pos);
152 }
153 
154 static void c_stop(struct seq_file *m, void *v)
155 {
156 }
157 
158 const struct seq_operations cpuinfo_op = {
159         .start  = c_start,
160         .next   = c_next,
161         .stop   = c_stop,
162         .show   = show_cpuinfo,
163 };
164 

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