cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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of-reconfig-notifier-error-inject.c (1346B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2#include <linux/kernel.h>
      3#include <linux/module.h>
      4#include <linux/of.h>
      5
      6#include "notifier-error-inject.h"
      7
      8static int priority;
      9module_param(priority, int, 0);
     10MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority");
     11
     12static struct notifier_err_inject reconfig_err_inject = {
     13	.actions = {
     14		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ATTACH_NODE) },
     15		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_DETACH_NODE) },
     16		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ADD_PROPERTY) },
     17		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_REMOVE_PROPERTY) },
     18		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_UPDATE_PROPERTY) },
     19		{}
     20	}
     21};
     22
     23static struct dentry *dir;
     24
     25static int err_inject_init(void)
     26{
     27	int err;
     28
     29	dir = notifier_err_inject_init("OF-reconfig",
     30		notifier_err_inject_dir, &reconfig_err_inject, priority);
     31	if (IS_ERR(dir))
     32		return PTR_ERR(dir);
     33
     34	err = of_reconfig_notifier_register(&reconfig_err_inject.nb);
     35	if (err)
     36		debugfs_remove_recursive(dir);
     37
     38	return err;
     39}
     40
     41static void err_inject_exit(void)
     42{
     43	of_reconfig_notifier_unregister(&reconfig_err_inject.nb);
     44	debugfs_remove_recursive(dir);
     45}
     46
     47module_init(err_inject_init);
     48module_exit(err_inject_exit);
     49
     50MODULE_DESCRIPTION("OF reconfig notifier error injection module");
     51MODULE_LICENSE("GPL");
     52MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");