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 if (c->x86_max_cores * smp_num_siblings > 1) { 15 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); 16 seq_printf(m, "siblings\t: %d\n", 17 cpumask_weight(cpu_core_mask(cpu))); 18 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id); 19 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); 20 seq_printf(m, "apicid\t\t: %d\n", c->apicid); 21 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid); 22 } 23 #endif 24 } 25 26 #ifdef CONFIG_X86_32 27 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 28 { 29 seq_printf(m, 30 "fdiv_bug\t: %s\n" 31 "hlt_bug\t\t: %s\n" 32 "f00f_bug\t: %s\n" 33 "coma_bug\t: %s\n" 34 "fpu\t\t: %s\n" 35 "fpu_exception\t: %s\n" 36 "cpuid level\t: %d\n" 37 "wp\t\t: %s\n", 38 c->fdiv_bug ? "yes" : "no", 39 c->hlt_works_ok ? "no" : "yes", 40 c->f00f_bug ? "yes" : "no", 41 c->coma_bug ? "yes" : "no", 42 c->hard_math ? "yes" : "no", 43 c->hard_math ? "yes" : "no", 44 c->cpuid_level, 45 c->wp_works_ok ? "yes" : "no"); 46 } 47 #else 48 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 49 { 50 seq_printf(m, 51 "fpu\t\t: yes\n" 52 "fpu_exception\t: yes\n" 53 "cpuid level\t: %d\n" 54 "wp\t\t: yes\n", 55 c->cpuid_level); 56 } 57 #endif 58 59 static int show_cpuinfo(struct seq_file *m, void *v) 60 { 61 struct cpuinfo_x86 *c = v; 62 unsigned int cpu; 63 int i; 64 65 cpu = c->cpu_index; 66 seq_printf(m, "processor\t: %u\n" 67 "vendor_id\t: %s\n" 68 "cpu family\t: %d\n" 69 "model\t\t: %u\n" 70 "model name\t: %s\n", 71 cpu, 72 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", 73 c->x86, 74 c->x86_model, 75 c->x86_model_id[0] ? c->x86_model_id : "unknown"); 76 77 if (c->x86_mask || c->cpuid_level >= 0) 78 seq_printf(m, "stepping\t: %d\n", c->x86_mask); 79 else 80 seq_printf(m, "stepping\t: unknown\n"); 81 if (c->microcode) 82 seq_printf(m, "microcode\t: 0x%x\n", c->microcode); 83 84 if (cpu_has(c, X86_FEATURE_TSC)) { 85 unsigned int freq = cpufreq_quick_get(cpu); 86 87 if (!freq) 88 freq = cpu_khz; 89 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", 90 freq / 1000, (freq % 1000)); 91 } 92 93 /* Cache size */ 94 if (c->x86_cache_size >= 0) 95 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); 96 97 show_cpuinfo_core(m, c, cpu); 98 show_cpuinfo_misc(m, c); 99 100 seq_printf(m, "flags\t\t:"); 101 for (i = 0; i < 32*NCAPINTS; i++) 102 if (cpu_has(c, i) && x86_cap_flags[i] != NULL) 103 seq_printf(m, " %s", x86_cap_flags[i]); 104 105 seq_printf(m, "\nbogomips\t: %lu.%02lu\n", 106 c->loops_per_jiffy/(500000/HZ), 107 (c->loops_per_jiffy/(5000/HZ)) % 100); 108 109 #ifdef CONFIG_X86_64 110 if (c->x86_tlbsize > 0) 111 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); 112 #endif 113 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); 114 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); 115 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 116 c->x86_phys_bits, c->x86_virt_bits); 117 118 seq_printf(m, "power management:"); 119 for (i = 0; i < 32; i++) { 120 if (c->x86_power & (1 << i)) { 121 if (i < ARRAY_SIZE(x86_power_flags) && 122 x86_power_flags[i]) 123 seq_printf(m, "%s%s", 124 x86_power_flags[i][0] ? " " : "", 125 x86_power_flags[i]); 126 else 127 seq_printf(m, " [%d]", i); 128 } 129 } 130 131 seq_printf(m, "\n\n"); 132 133 return 0; 134 } 135 136 static void *c_start(struct seq_file *m, loff_t *pos) 137 { 138 *pos = cpumask_next(*pos - 1, cpu_online_mask); 139 if ((*pos) < nr_cpu_ids) 140 return &cpu_data(*pos); 141 return NULL; 142 } 143 144 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 145 { 146 (*pos)++; 147 return c_start(m, pos); 148 } 149 150 static void c_stop(struct seq_file *m, void *v) 151 { 152 } 153 154 const struct seq_operations cpuinfo_op = { 155 .start = c_start, 156 .next = c_next, 157 .stop = c_stop, 158 .show = show_cpuinfo, 159 }; 160