1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/smp.h> 3 #include <linux/timex.h> 4 #include <linux/string.h> 5 #include <linux/seq_file.h> 6 #include <linux/cpufreq.h> 7 8 #include "cpu.h" 9 10 #ifdef CONFIG_X86_VMX_FEATURE_NAMES 11 extern const char * const x86_vmx_flags[NVMXINTS*32]; 12 #endif 13 14 /* 15 * Get CPU information for use by the procfs. 16 */ 17 static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c, 18 unsigned int cpu) 19 { 20 #ifdef CONFIG_SMP 21 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); 22 seq_printf(m, "siblings\t: %d\n", 23 cpumask_weight(topology_core_cpumask(cpu))); 24 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id); 25 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); 26 seq_printf(m, "apicid\t\t: %d\n", c->apicid); 27 seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid); 28 #endif 29 } 30 31 #ifdef CONFIG_X86_32 32 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 33 { 34 seq_printf(m, 35 "fdiv_bug\t: %s\n" 36 "f00f_bug\t: %s\n" 37 "coma_bug\t: %s\n" 38 "fpu\t\t: %s\n" 39 "fpu_exception\t: %s\n" 40 "cpuid level\t: %d\n" 41 "wp\t\t: yes\n", 42 boot_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no", 43 boot_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no", 44 boot_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no", 45 boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no", 46 boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no", 47 c->cpuid_level); 48 } 49 #else 50 static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c) 51 { 52 seq_printf(m, 53 "fpu\t\t: yes\n" 54 "fpu_exception\t: yes\n" 55 "cpuid level\t: %d\n" 56 "wp\t\t: yes\n", 57 c->cpuid_level); 58 } 59 #endif 60 61 static int show_cpuinfo(struct seq_file *m, void *v) 62 { 63 struct cpuinfo_x86 *c = v; 64 unsigned int cpu; 65 int i; 66 67 cpu = c->cpu_index; 68 seq_printf(m, "processor\t: %u\n" 69 "vendor_id\t: %s\n" 70 "cpu family\t: %d\n" 71 "model\t\t: %u\n" 72 "model name\t: %s\n", 73 cpu, 74 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", 75 c->x86, 76 c->x86_model, 77 c->x86_model_id[0] ? c->x86_model_id : "unknown"); 78 79 if (c->x86_stepping || c->cpuid_level >= 0) 80 seq_printf(m, "stepping\t: %d\n", c->x86_stepping); 81 else 82 seq_puts(m, "stepping\t: unknown\n"); 83 if (c->microcode) 84 seq_printf(m, "microcode\t: 0x%x\n", c->microcode); 85 86 if (cpu_has(c, X86_FEATURE_TSC)) { 87 unsigned int freq = aperfmperf_get_khz(cpu); 88 89 if (!freq) 90 freq = cpufreq_quick_get(cpu); 91 if (!freq) 92 freq = cpu_khz; 93 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", 94 freq / 1000, (freq % 1000)); 95 } 96 97 /* Cache size */ 98 if (c->x86_cache_size) 99 seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size); 100 101 show_cpuinfo_core(m, c, cpu); 102 show_cpuinfo_misc(m, c); 103 104 seq_puts(m, "flags\t\t:"); 105 for (i = 0; i < 32*NCAPINTS; i++) 106 if (cpu_has(c, i) && x86_cap_flags[i] != NULL) 107 seq_printf(m, " %s", x86_cap_flags[i]); 108 109 #ifdef CONFIG_X86_VMX_FEATURE_NAMES 110 if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) { 111 seq_puts(m, "\nvmx flags\t:"); 112 for (i = 0; i < 32*NVMXINTS; i++) { 113 if (test_bit(i, (unsigned long *)c->vmx_capability) && 114 x86_vmx_flags[i] != NULL) 115 seq_printf(m, " %s", x86_vmx_flags[i]); 116 } 117 } 118 #endif 119 120 seq_puts(m, "\nbugs\t\t:"); 121 for (i = 0; i < 32*NBUGINTS; i++) { 122 unsigned int bug_bit = 32*NCAPINTS + i; 123 124 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i]) 125 seq_printf(m, " %s", x86_bug_flags[i]); 126 } 127 128 seq_printf(m, "\nbogomips\t: %lu.%02lu\n", 129 c->loops_per_jiffy/(500000/HZ), 130 (c->loops_per_jiffy/(5000/HZ)) % 100); 131 132 #ifdef CONFIG_X86_64 133 if (c->x86_tlbsize > 0) 134 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); 135 #endif 136 seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); 137 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); 138 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 139 c->x86_phys_bits, c->x86_virt_bits); 140 141 seq_puts(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_puts(m, "\n\n"); 155 156 return 0; 157 } 158 159 static void *c_start(struct seq_file *m, loff_t *pos) 160 { 161 *pos = cpumask_next(*pos - 1, cpu_online_mask); 162 if ((*pos) < nr_cpu_ids) 163 return &cpu_data(*pos); 164 return NULL; 165 } 166 167 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 168 { 169 (*pos)++; 170 return c_start(m, pos); 171 } 172 173 static void c_stop(struct seq_file *m, void *v) 174 { 175 } 176 177 const struct seq_operations cpuinfo_op = { 178 .start = c_start, 179 .next = c_next, 180 .stop = c_stop, 181 .show = show_cpuinfo, 182 }; 183