// SPDX-License-Identifier: GPL-2.0#include <linux/smp.h>#include <linux/timex.h>#include <linux/string.h>#include <linux/seq_file.h>#include <linux/cpufreq.h>#include <asm/prctl.h>#include <linux/proc_fs.h> #include "cpu.h" #ifdef CONFIG_X86_VMX_FEATURE_NAMESextern const char * const x86_vmx_flags[NVMXINTS*32];#endif /* *	Get CPU information for use by the procfs. */static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,			      unsigned int cpu){#ifdef CONFIG_SMP	seq_printf(m, "physical id\t: %d\n", c->topo.pkg_id);	seq_printf(m, "siblings\t: %d\n",		   cpumask_weight(topology_core_cpumask(cpu)));	seq_printf(m, "core id\t\t: %d\n", c->topo.core_id);	seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);	seq_printf(m, "apicid\t\t: %d\n", c->topo.apicid);	seq_printf(m, "initial apicid\t: %d\n", c->topo.initial_apicid);#endif} #ifdef CONFIG_X86_32static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c){	seq_printf(m,		   "fdiv_bug\t: %s\n"		   "f00f_bug\t: %s\n"		   "coma_bug\t: %s\n"		   "fpu\t\t: %s\n"		   "fpu_exception\t: %s\n"		   "cpuid level\t: %d\n"		   "wp\t\t: yes\n",		   str_yes_no(boot_cpu_has_bug(X86_BUG_FDIV)),		   str_yes_no(boot_cpu_has_bug(X86_BUG_F00F)),		   str_yes_no(boot_cpu_has_bug(X86_BUG_COMA)),		   str_yes_no(boot_cpu_has(X86_FEATURE_FPU)),		   str_yes_no(boot_cpu_has(X86_FEATURE_FPU)),		   c->cpuid_level);}#elsestatic void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c){	seq_printf(m,		   "fpu\t\t: yes\n"		   "fpu_exception\t: yes\n"		   "cpuid level\t: %d\n"		   "wp\t\t: yes\n",		   c->cpuid_level);}#endif static int show_cpuinfo(struct seq_file *m, void *v){	struct cpuinfo_x86 *c = v;	unsigned int cpu;	int i; 	cpu = c->cpu_index;	seq_printf(m, "processor\t: %u\n"		   "vendor_id\t: %s\n"		   "cpu family\t: %d\n"		   "model\t\t: %u\n"		   "model name\t: %s\n",		   cpu,		   c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",		   c->x86,		   c->x86_model,		   c->x86_model_id[0] ? c->x86_model_id : "unknown"); 	if (c->x86_stepping || c->cpuid_level >= 0)		seq_printf(m, "stepping\t: %d\n", c->x86_stepping);	else		seq_puts(m, "stepping\t: unknown\n");	if (c->microcode)		seq_printf(m, "microcode\t: 0x%x\n", c->microcode); 	if (cpu_has(c, X86_FEATURE_TSC)) {		int freq = arch_freq_get_on_cpu(cpu); 		if (freq < 0)			seq_puts(m, "cpu MHz\t\t: Unknown\n");		else			seq_printf(m, "cpu MHz\t\t: %u.%03u\n", freq / 1000, (freq % 1000));	} 	/* Cache size */	if (c->x86_cache_size)		seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size); 	show_cpuinfo_core(m, c, cpu);	show_cpuinfo_misc(m, c); 	seq_puts(m, "flags\t\t:");	for (i = 0; i < 32*NCAPINTS; i++)		if (cpu_has(c, i) && x86_cap_flags[i] != NULL)			seq_printf(m, " %s", x86_cap_flags[i]); #ifdef CONFIG_X86_VMX_FEATURE_NAMES	if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) {		seq_puts(m, "\nvmx flags\t:");		for (i = 0; i < 32*NVMXINTS; i++) {			if (test_bit(i, (unsigned long *)c->vmx_capability) &&			    x86_vmx_flags[i] != NULL)				seq_printf(m, " %s", x86_vmx_flags[i]);		}	}#endif 	seq_puts(m, "\nbugs\t\t:");	for (i = 0; i < 32*NBUGINTS; i++) {		unsigned int bug_bit = 32*NCAPINTS + i; 		if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])			seq_printf(m, " %s", x86_bug_flags[i]);	} 	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",		   c->loops_per_jiffy/(500000/HZ),		   (c->loops_per_jiffy/(5000/HZ)) % 100); #ifdef CONFIG_X86_64	if (c->x86_tlbsize > 0)		seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);#endif	seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);	seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);	seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",		   c->x86_phys_bits, c->x86_virt_bits); 	seq_puts(m, "power management:");	for (i = 0; i < 32; i++) {		if (c->x86_power & (1 << i)) {			if (i < ARRAY_SIZE(x86_power_flags) &&			    x86_power_flags[i])				seq_printf(m, "%s%s",					   x86_power_flags[i][0] ? " " : "",					   x86_power_flags[i]);			else				seq_printf(m, " [%d]", i);		}	} 	seq_puts(m, "\n\n"); 	return 0;} static void *c_start(struct seq_file *m, loff_t *pos){	*pos = cpumask_next(*pos - 1, cpu_online_mask);	if ((*pos) < nr_cpu_ids)		return &cpu_data(*pos);	return NULL;} static void *c_next(struct seq_file *m, void *v, loff_t *pos){	(*pos)++;	return c_start(m, pos);} static void c_stop(struct seq_file *m, void *v){} const struct seq_operations cpuinfo_op = {	.start	= c_start,	.next	= c_next,	.stop	= c_stop,	.show	= show_cpuinfo,}; #ifdef CONFIG_X86_USER_SHADOW_STACKstatic void dump_x86_features(struct seq_file *m, unsigned long features){	if (features & ARCH_SHSTK_SHSTK)		seq_puts(m, "shstk ");	if (features & ARCH_SHSTK_WRSS)		seq_puts(m, "wrss ");} void arch_proc_pid_thread_features(struct seq_file *m, struct task_struct *task){	seq_puts(m, "x86_Thread_features:\t");	dump_x86_features(m, task->thread.features);	seq_putc(m, '\n'); 	seq_puts(m, "x86_Thread_features_locked:\t");	dump_x86_features(m, task->thread.features_locked);	seq_putc(m, '\n');}#endif /* CONFIG_X86_USER_SHADOW_STACK */