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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", cpumask_weight(cpu_core_mask(cpu)));
 16         seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
 17         seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
 18         seq_printf(m, "apicid\t\t: %d\n", c->apicid);
 19         seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
 20 #endif
 21 }
 22 
 23 #ifdef CONFIG_X86_32
 24 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
 25 {
 26         seq_printf(m,
 27                    "fdiv_bug\t: %s\n"
 28                    "f00f_bug\t: %s\n"
 29                    "coma_bug\t: %s\n"
 30                    "fpu\t\t: %s\n"
 31                    "fpu_exception\t: %s\n"
 32                    "cpuid level\t: %d\n"
 33                    "wp\t\t: %s\n",
 34                    static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
 35                    static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
 36                    static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
 37                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
 38                    static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
 39                    c->cpuid_level,
 40                    c->wp_works_ok ? "yes" : "no");
 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_printf(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                 unsigned int freq = cpufreq_quick_get(cpu);
 81 
 82                 if (!freq)
 83                         freq = cpu_khz;
 84                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
 85                            freq / 1000, (freq % 1000));
 86         }
 87 
 88         /* Cache size */
 89         if (c->x86_cache_size >= 0)
 90                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 91 
 92         show_cpuinfo_core(m, c, cpu);
 93         show_cpuinfo_misc(m, c);
 94 
 95         seq_printf(m, "flags\t\t:");
 96         for (i = 0; i < 32*NCAPINTS; i++)
 97                 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 98                         seq_printf(m, " %s", x86_cap_flags[i]);
 99 
100         seq_printf(m, "\nbugs\t\t:");
101         for (i = 0; i < 32*NBUGINTS; i++) {
102                 unsigned int bug_bit = 32*NCAPINTS + i;
103 
104                 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
105                         seq_printf(m, " %s", x86_bug_flags[i]);
106         }
107 
108         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
109                    c->loops_per_jiffy/(500000/HZ),
110                    (c->loops_per_jiffy/(5000/HZ)) % 100);
111 
112 #ifdef CONFIG_X86_64
113         if (c->x86_tlbsize > 0)
114                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
115 #endif
116         seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
117         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
118         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
119                    c->x86_phys_bits, c->x86_virt_bits);
120 
121         seq_printf(m, "power management:");
122         for (i = 0; i < 32; i++) {
123                 if (c->x86_power & (1 << i)) {
124                         if (i < ARRAY_SIZE(x86_power_flags) &&
125                             x86_power_flags[i])
126                                 seq_printf(m, "%s%s",
127                                            x86_power_flags[i][0] ? " " : "",
128                                            x86_power_flags[i]);
129                         else
130                                 seq_printf(m, " [%d]", i);
131                 }
132         }
133 
134         seq_printf(m, "\n\n");
135 
136         return 0;
137 }
138 
139 static void *c_start(struct seq_file *m, loff_t *pos)
140 {
141         *pos = cpumask_next(*pos - 1, cpu_online_mask);
142         if ((*pos) < nr_cpu_ids)
143                 return &cpu_data(*pos);
144         return NULL;
145 }
146 
147 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
148 {
149         (*pos)++;
150         return c_start(m, pos);
151 }
152 
153 static void c_stop(struct seq_file *m, void *v)
154 {
155 }
156 
157 const struct seq_operations cpuinfo_op = {
158         .start  = c_start,
159         .next   = c_next,
160         .stop   = c_stop,
161         .show   = show_cpuinfo,
162 };
163 

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