Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Thomas Gleixner |
118 |
35.76% |
3 |
30.00% |
| Kees Cook |
101 |
30.61% |
1 |
10.00% |
| Andrew Lutomirski |
70 |
21.21% |
1 |
10.00% |
| Yangtao Li |
15 |
4.55% |
1 |
10.00% |
| Borislav Petkov |
15 |
4.55% |
1 |
10.00% |
| Sai Praneeth |
7 |
2.12% |
1 |
10.00% |
| Steven Price |
3 |
0.91% |
1 |
10.00% |
| Mike Rapoport |
1 |
0.30% |
1 |
10.00% |
| Total |
330 |
|
10 |
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/debugfs.h>
#include <linux/efi.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/pgtable.h>
static int ptdump_show(struct seq_file *m, void *v)
{
ptdump_walk_pgd_level_debugfs(m, &init_mm, false);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ptdump);
static int ptdump_curknl_show(struct seq_file *m, void *v)
{
if (current->mm->pgd)
ptdump_walk_pgd_level_debugfs(m, current->mm, false);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ptdump_curknl);
#ifdef CONFIG_PAGE_TABLE_ISOLATION
static int ptdump_curusr_show(struct seq_file *m, void *v)
{
if (current->mm->pgd)
ptdump_walk_pgd_level_debugfs(m, current->mm, true);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ptdump_curusr);
#endif
#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
static int ptdump_efi_show(struct seq_file *m, void *v)
{
if (efi_mm.pgd)
ptdump_walk_pgd_level_debugfs(m, &efi_mm, false);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ptdump_efi);
#endif
static struct dentry *dir;
static int __init pt_dump_debug_init(void)
{
dir = debugfs_create_dir("page_tables", NULL);
debugfs_create_file("kernel", 0400, dir, NULL, &ptdump_fops);
debugfs_create_file("current_kernel", 0400, dir, NULL,
&ptdump_curknl_fops);
#ifdef CONFIG_PAGE_TABLE_ISOLATION
debugfs_create_file("current_user", 0400, dir, NULL,
&ptdump_curusr_fops);
#endif
#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
debugfs_create_file("efi", 0400, dir, NULL, &ptdump_efi_fops);
#endif
return 0;
}
static void __exit pt_dump_debug_exit(void)
{
debugfs_remove_recursive(dir);
}
module_init(pt_dump_debug_init);
module_exit(pt_dump_debug_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
MODULE_DESCRIPTION("Kernel debugging helper that dumps pagetables");