// SPDX-License-Identifier: GPL-2.0-or-later/* * FIPS 200 support. * * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com> */ #include <linux/export.h>#include <linux/fips.h>#include <linux/init.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/sysctl.h>#include <linux/notifier.h> int fips_enabled;EXPORT_SYMBOL_GPL(fips_enabled); ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);EXPORT_SYMBOL_GPL(fips_fail_notif_chain); /* Process kernel command-line parameter at boot time. fips=0 or fips=1 */static int fips_enable(char *str){	fips_enabled = !!simple_strtol(str, NULL, 0);	printk(KERN_INFO "fips mode: %s\n",		fips_enabled ? "enabled" : "disabled");	return 1;} __setup("fips=", fips_enable); static struct ctl_table crypto_sysctl_table[] = {	{		.procname       = "fips_enabled",		.data           = &fips_enabled,		.maxlen         = sizeof(int),		.mode           = 0444,		.proc_handler   = proc_dointvec	},	{}}; static struct ctl_table crypto_dir_table[] = {	{		.procname       = "crypto",		.mode           = 0555,		.child          = crypto_sysctl_table	},	{}}; static struct ctl_table_header *crypto_sysctls; static void crypto_proc_fips_init(void){	crypto_sysctls = register_sysctl_table(crypto_dir_table);} static void crypto_proc_fips_exit(void){	unregister_sysctl_table(crypto_sysctls);} void fips_fail_notify(void){	if (fips_enabled)		atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL);}EXPORT_SYMBOL_GPL(fips_fail_notify); static int __init fips_init(void){	crypto_proc_fips_init();	return 0;} static void __exit fips_exit(void){	crypto_proc_fips_exit();} subsys_initcall(fips_init);module_exit(fips_exit);