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 #ifdef CONFIG_X86_32 11 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c, 12 unsigned int cpu) 13 { 14 #ifdef CONFIG_X86_HT 15 if (c->x86_max_cores * smp_num_siblings > 1) { 16 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); 17 seq_printf(m, "siblings\t: %d\n", 18 cpus_weight(per_cpu(cpu_core_map, cpu))); 19 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id); 20 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); 21 seq_printf(m, "apicid\t\t: %d\n", c->apicid); 22 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid); 23 } 24 #endif 25 } 26 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_core(struct seq_file *m, struct cpuinfo_x86 *c, 54 unsigned int cpu) 55 { 56 #ifdef CONFIG_SMP 57 if (c->x86_max_cores * smp_num_siblings > 1) { 58 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); 59 seq_printf(m, "siblings\t: %d\n", 60 cpus_weight(per_cpu(cpu_core_map, cpu))); 61 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id); 62 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); 63 seq_printf(m, "apicid\t\t: %d\n", c->apicid); 64 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid); 65 } 66 #endif 67 } 68 69 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 70 { 71 seq_printf(m, 72 "fpu\t\t: yes\n" 73 "fpu_exception\t: yes\n" 74 "cpuid level\t: %d\n" 75 "wp\t\t: yes\n", 76 c->cpuid_level); 77 } 78 #endif 79 80 static int show_cpuinfo(struct seq_file *m, void *v) 81 { 82 struct cpuinfo_x86 *c = v; 83 unsigned int cpu = 0; 84 int i; 85 86 #ifdef CONFIG_SMP 87 cpu = c->cpu_index; 88 #endif 89 seq_printf(m, "processor\t: %u\n" 90 "vendor_id\t: %s\n" 91 "cpu family\t: %d\n" 92 "model\t\t: %u\n" 93 "model name\t: %s\n", 94 cpu, 95 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", 96 c->x86, 97 c->x86_model, 98 c->x86_model_id[0] ? c->x86_model_id : "unknown"); 99 100 if (c->x86_mask || c->cpuid_level >= 0) 101 seq_printf(m, "stepping\t: %d\n", c->x86_mask); 102 else 103 seq_printf(m, "stepping\t: unknown\n"); 104 105 if (cpu_has(c, X86_FEATURE_TSC)) { 106 unsigned int freq = cpufreq_quick_get(cpu); 107 108 if (!freq) 109 freq = cpu_khz; 110 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", 111 freq / 1000, (freq % 1000)); 112 } 113 114 /* Cache size */ 115 if (c->x86_cache_size >= 0) 116 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); 117 118 show_cpuinfo_core(m, c, cpu); 119 show_cpuinfo_misc(m, c); 120 121 seq_printf(m, "flags\t\t:"); 122 for (i = 0; i < 32*NCAPINTS; i++) 123 if (cpu_has(c, i) && x86_cap_flags[i] != NULL) 124 seq_printf(m, " %s", x86_cap_flags[i]); 125 126 seq_printf(m, "\nbogomips\t: %lu.%02lu\n", 127 c->loops_per_jiffy/(500000/HZ), 128 (c->loops_per_jiffy/(5000/HZ)) % 100); 129 130 #ifdef CONFIG_X86_64 131 if (c->x86_tlbsize > 0) 132 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); 133 #endif 134 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); 135 #ifdef CONFIG_X86_64 136 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); 137 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 138 c->x86_phys_bits, c->x86_virt_bits); 139 #endif 140 141 seq_printf(m, "power management:"); 142 for (i = 0; i < 32; i++) { 143 if (c->x86_power & (1 << i)) { 144 if (i < ARRAY_SIZE(x86_power_flags) && 145 x86_power_flags[i]) 146 seq_printf(m, "%s%s", 147 x86_power_flags[i][0]?" ":"", 148 x86_power_flags[i]); 149 else 150 seq_printf(m, " [%d]", i); 151 } 152 } 153 154 seq_printf(m, "\n\n"); 155 156 return 0; 157 } 158 159 static void *c_start(struct seq_file *m, loff_t *pos) 160 { 161 if (*pos == 0) /* just in case, cpu 0 is not the first */ 162 *pos = first_cpu(cpu_online_map); 163 else 164 *pos = next_cpu_nr(*pos - 1, cpu_online_map); 165 if ((*pos) < nr_cpu_ids) 166 return &cpu_data(*pos); 167 return NULL; 168 } 169 170 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 171 { 172 (*pos)++; 173 return c_start(m, pos); 174 } 175 176 static void c_stop(struct seq_file *m, void *v) 177 { 178 } 179 180 const struct seq_operations cpuinfo_op = { 181 .start = c_start, 182 .next = c_next, 183 .stop = c_stop, 184 .show = show_cpuinfo, 185 }; 186