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 /* 30 * We use exception 16 if we have hardware math and we've either seen 31 * it or the CPU claims it is internal 32 */ 33 int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu); 34 seq_printf(m, 35 "fdiv_bug\t: %s\n" 36 "hlt_bug\t\t: %s\n" 37 "f00f_bug\t: %s\n" 38 "coma_bug\t: %s\n" 39 "fpu\t\t: %s\n" 40 "fpu_exception\t: %s\n" 41 "cpuid level\t: %d\n" 42 "wp\t\t: %s\n", 43 c->fdiv_bug ? "yes" : "no", 44 c->hlt_works_ok ? "no" : "yes", 45 c->f00f_bug ? "yes" : "no", 46 c->coma_bug ? "yes" : "no", 47 c->hard_math ? "yes" : "no", 48 fpu_exception ? "yes" : "no", 49 c->cpuid_level, 50 c->wp_works_ok ? "yes" : "no"); 51 } 52 #else 53 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 54 { 55 seq_printf(m, 56 "fpu\t\t: yes\n" 57 "fpu_exception\t: yes\n" 58 "cpuid level\t: %d\n" 59 "wp\t\t: yes\n", 60 c->cpuid_level); 61 } 62 #endif 63 64 static int show_cpuinfo(struct seq_file *m, void *v) 65 { 66 struct cpuinfo_x86 *c = v; 67 unsigned int cpu; 68 int i; 69 70 cpu = c->cpu_index; 71 seq_printf(m, "processor\t: %u\n" 72 "vendor_id\t: %s\n" 73 "cpu family\t: %d\n" 74 "model\t\t: %u\n" 75 "model name\t: %s\n", 76 cpu, 77 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", 78 c->x86, 79 c->x86_model, 80 c->x86_model_id[0] ? c->x86_model_id : "unknown"); 81 82 if (c->x86_mask || c->cpuid_level >= 0) 83 seq_printf(m, "stepping\t: %d\n", c->x86_mask); 84 else 85 seq_printf(m, "stepping\t: unknown\n"); 86 if (c->microcode) 87 seq_printf(m, "microcode\t: 0x%x\n", c->microcode); 88 89 if (cpu_has(c, X86_FEATURE_TSC)) { 90 unsigned int freq = cpufreq_quick_get(cpu); 91 92 if (!freq) 93 freq = cpu_khz; 94 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", 95 freq / 1000, (freq % 1000)); 96 } 97 98 /* Cache size */ 99 if (c->x86_cache_size >= 0) 100 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); 101 102 show_cpuinfo_core(m, c, cpu); 103 show_cpuinfo_misc(m, c); 104 105 seq_printf(m, "flags\t\t:"); 106 for (i = 0; i < 32*NCAPINTS; i++) 107 if (cpu_has(c, i) && x86_cap_flags[i] != NULL) 108 seq_printf(m, " %s", x86_cap_flags[i]); 109 110 seq_printf(m, "\nbogomips\t: %lu.%02lu\n", 111 c->loops_per_jiffy/(500000/HZ), 112 (c->loops_per_jiffy/(5000/HZ)) % 100); 113 114 #ifdef CONFIG_X86_64 115 if (c->x86_tlbsize > 0) 116 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); 117 #endif 118 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); 119 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); 120 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 121 c->x86_phys_bits, c->x86_virt_bits); 122 123 seq_printf(m, "power management:"); 124 for (i = 0; i < 32; i++) { 125 if (c->x86_power & (1 << i)) { 126 if (i < ARRAY_SIZE(x86_power_flags) && 127 x86_power_flags[i]) 128 seq_printf(m, "%s%s", 129 x86_power_flags[i][0] ? " " : "", 130 x86_power_flags[i]); 131 else 132 seq_printf(m, " [%d]", i); 133 } 134 } 135 136 seq_printf(m, "\n\n"); 137 138 return 0; 139 } 140 141 static void *c_start(struct seq_file *m, loff_t *pos) 142 { 143 if (*pos == 0) /* just in case, cpu 0 is not the first */ 144 *pos = cpumask_first(cpu_online_mask); 145 else 146 *pos = cpumask_next(*pos - 1, cpu_online_mask); 147 if ((*pos) < nr_cpu_ids) 148 return &cpu_data(*pos); 149 return NULL; 150 } 151 152 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 153 { 154 (*pos)++; 155 return c_start(m, pos); 156 } 157 158 static void c_stop(struct seq_file *m, void *v) 159 { 160 } 161 162 const struct seq_operations cpuinfo_op = { 163 .start = c_start, 164 .next = c_next, 165 .stop = c_stop, 166 .show = show_cpuinfo, 167 }; 168