Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Arjan van de Ven |
86 |
26.46% |
1 |
7.14% |
| Thomas Gleixner |
77 |
23.69% |
3 |
21.43% |
| Kees Cook |
75 |
23.08% |
1 |
7.14% |
| Andrew Lutomirski |
37 |
11.38% |
1 |
7.14% |
| Borislav Petkov |
21 |
6.46% |
1 |
7.14% |
| Yangtao Li |
15 |
4.62% |
1 |
7.14% |
| Sai Praneeth |
4 |
1.23% |
1 |
7.14% |
| Steven Price |
3 |
0.92% |
1 |
7.14% |
| Huang Ying |
3 |
0.92% |
1 |
7.14% |
| Breno Leitão |
2 |
0.62% |
1 |
7.14% |
| Mike Rapoport |
1 |
0.31% |
1 |
7.14% |
| H. Peter Anvin |
1 |
0.31% |
1 |
7.14% |
| Total |
325 |
|
14 |
|
// 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_MITIGATION_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_MITIGATION_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_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
MODULE_DESCRIPTION("Kernel debugging helper that dumps pagetables");