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: 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 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_puts(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_puts(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_puts(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_puts(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