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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fault-inject-usercopy.c (823B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2#include <linux/fault-inject.h>
      3#include <linux/fault-inject-usercopy.h>
      4
      5static struct {
      6	struct fault_attr attr;
      7} fail_usercopy = {
      8	.attr = FAULT_ATTR_INITIALIZER,
      9};
     10
     11static int __init setup_fail_usercopy(char *str)
     12{
     13	return setup_fault_attr(&fail_usercopy.attr, str);
     14}
     15__setup("fail_usercopy=", setup_fail_usercopy);
     16
     17#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
     18
     19static int __init fail_usercopy_debugfs(void)
     20{
     21	struct dentry *dir;
     22
     23	dir = fault_create_debugfs_attr("fail_usercopy", NULL,
     24					&fail_usercopy.attr);
     25	if (IS_ERR(dir))
     26		return PTR_ERR(dir);
     27
     28	return 0;
     29}
     30
     31late_initcall(fail_usercopy_debugfs);
     32
     33#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
     34
     35bool should_fail_usercopy(void)
     36{
     37	return should_fail(&fail_usercopy.attr, 1);
     38}
     39EXPORT_SYMBOL_GPL(should_fail_usercopy);