mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
cae681fc12
Useful for some testing scenarios, although specific testing is often done better through MADV_POISON This can be done with the x86 level MCE injector too, but this interface allows it to do independently from low level x86 changes. v2: Add module license (Haicheng Li) Signed-off-by: Andi Kleen <ak@linux.intel.com>
42 lines
988 B
C
42 lines
988 B
C
/* Inject a hwpoison memory failure on a arbitary pfn */
|
|
#include <linux/module.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
|
|
static struct dentry *hwpoison_dir, *corrupt_pfn;
|
|
|
|
static int hwpoison_inject(void *data, u64 val)
|
|
{
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
printk(KERN_INFO "Injecting memory failure at pfn %Lx\n", val);
|
|
return __memory_failure(val, 18, 0);
|
|
}
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(hwpoison_fops, NULL, hwpoison_inject, "%lli\n");
|
|
|
|
static void pfn_inject_exit(void)
|
|
{
|
|
if (hwpoison_dir)
|
|
debugfs_remove_recursive(hwpoison_dir);
|
|
}
|
|
|
|
static int pfn_inject_init(void)
|
|
{
|
|
hwpoison_dir = debugfs_create_dir("hwpoison", NULL);
|
|
if (hwpoison_dir == NULL)
|
|
return -ENOMEM;
|
|
corrupt_pfn = debugfs_create_file("corrupt-pfn", 0600, hwpoison_dir,
|
|
NULL, &hwpoison_fops);
|
|
if (corrupt_pfn == NULL) {
|
|
pfn_inject_exit();
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
module_init(pfn_inject_init);
|
|
module_exit(pfn_inject_exit);
|
|
MODULE_LICENSE("GPL");
|