1 #include <linux/smp.h> 2 #include <linux/timex.h> 3 #include <linux/string.h> 4 #include <linux/seq_file.h> 5 6 /* 7 * Get CPU information for use by the procfs. 8 */ 9 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c, 10 unsigned int cpu) 11 { 12 #ifdef CONFIG_SMP 13 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); 14 seq_printf(m, "siblings\t: %d\n", 15 cpumask_weight(topology_core_cpumask(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: yes\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 } 41 #else 42 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 43 { 44 seq_printf(m, 45 "fpu\t\t: yes\n" 46 "fpu_exception\t: yes\n" 47 "cpuid level\t: %d\n" 48 "wp\t\t: yes\n", 49 c->cpuid_level); 50 } 51 #endif 52 53 static int show_cpuinfo(struct seq_file *m, void *v) 54 { 55 struct cpuinfo_x86 *c = v; 56 unsigned int cpu; 57 int i; 58 59 cpu = c->cpu_index; 60 seq_printf(m, "processor\t: %u\n" 61 "vendor_id\t: %s\n" 62 "cpu family\t: %d\n" 63 "model\t\t: %u\n" 64 "model name\t: %s\n", 65 cpu, 66 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", 67 c->x86, 68 c->x86_model, 69 c->x86_model_id[0] ? c->x86_model_id : "unknown"); 70 71 if (c->x86_mask || c->cpuid_level >= 0) 72 seq_printf(m, "stepping\t: %d\n", c->x86_mask); 73 else 74 seq_puts(m, "stepping\t: unknown\n"); 75 if (c->microcode) 76 seq_printf(m, "microcode\t: 0x%x\n", c->microcode); 77 78 if (cpu_has(c, X86_FEATURE_TSC)) 79 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", 80 cpu_khz / 1000, (cpu_khz % 1000)); 81 82 /* Cache size */ 83 if (c->x86_cache_size >= 0) 84 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); 85 86 show_cpuinfo_core(m, c, cpu); 87 show_cpuinfo_misc(m, c); 88 89 seq_puts(m, "flags\t\t:"); 90 for (i = 0; i < 32*NCAPINTS; i++) 91 if (cpu_has(c, i) && x86_cap_flags[i] != NULL) 92 seq_printf(m, " %s", x86_cap_flags[i]); 93 94 seq_puts(m, "\nbugs\t\t:"); 95 for (i = 0; i < 32*NBUGINTS; i++) { 96 unsigned int bug_bit = 32*NCAPINTS + i; 97 98 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i]) 99 seq_printf(m, " %s", x86_bug_flags[i]); 100 } 101 102 seq_printf(m, "\nbogomips\t: %lu.%02lu\n", 103 c->loops_per_jiffy/(500000/HZ), 104 (c->loops_per_jiffy/(5000/HZ)) % 100); 105 106 #ifdef CONFIG_X86_64 107 if (c->x86_tlbsize > 0) 108 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); 109 #endif 110 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); 111 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); 112 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 113 c->x86_phys_bits, c->x86_virt_bits); 114 115 seq_puts(m, "power management:"); 116 for (i = 0; i < 32; i++) { 117 if (c->x86_power & (1 << i)) { 118 if (i < ARRAY_SIZE(x86_power_flags) && 119 x86_power_flags[i]) 120 seq_printf(m, "%s%s", 121 x86_power_flags[i][0] ? " " : "", 122 x86_power_flags[i]); 123 else 124 seq_printf(m, " [%d]", i); 125 } 126 } 127 128 seq_puts(m, "\n\n"); 129 130 return 0; 131 } 132 133 static void *c_start(struct seq_file *m, loff_t *pos) 134 { 135 *pos = cpumask_next(*pos - 1, cpu_online_mask); 136 if ((*pos) < nr_cpu_ids) 137 return &cpu_data(*pos); 138 return NULL; 139 } 140 141 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 142 { 143 (*pos)++; 144 return c_start(m, pos); 145 } 146 147 static void c_stop(struct seq_file *m, void *v) 148 { 149 } 150 151 const struct seq_operations cpuinfo_op = { 152 .start = c_start, 153 .next = c_next, 154 .stop = c_stop, 155 .show = show_cpuinfo, 156 }; 157