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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
static int __init cpui_init(void)
{
char id_str[13];
uint32_t eax = 0, ebx, ecx, edx;
if (!have_cpuid_p()) {
pr_err("CPUID instruction is NOT supported. Aborting.\n");
return 1;
}
cpuid(0, &eax, &ebx, &ecx, &edx);
pr_info("CPUID instruction is supported.\n");
pr_info("Maximum Input Value for Basic CPUID Information = %d\n", eax);
memcpy(&(id_str[0]), &ebx, 4);
memcpy(&(id_str[4]), &edx, 4);
memcpy(&(id_str[8]), &ecx, 4);
id_str[12] = '\0';
pr_info("Identity string = %s\n", id_str);
return 0;
}
static void __exit cpui_exit(void)
{
pr_info("Exit complete\n");
}
module_init(cpui_init);
module_exit(cpui_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Joursoir");
MODULE_DESCRIPTION("A driver that allows users to interact with various internal components of the CPU");
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