linux/arch/x86/kernel/cpu/proc.c

// 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_NAMES
extern 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_X86_32
static 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",
		   boot_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
		   boot_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
		   boot_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
		   boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
		   boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
		   c->cpuid_level);
}
#else
static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
{ … }
#endif

static int show_cpuinfo(struct seq_file *m, void *v)
{ … }

static void *c_start(struct seq_file *m, loff_t *pos)
{ … }

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{ … }

static void c_stop(struct seq_file *m, void *v)
{ … }

const struct seq_operations cpuinfo_op = …;

#ifdef CONFIG_X86_USER_SHADOW_STACK
static void dump_x86_features(struct seq_file *m, unsigned long features)
{ … }

void arch_proc_pid_thread_features(struct seq_file *m, struct task_struct *task)
{ … }
#endif /* CONFIG_X86_USER_SHADOW_STACK */