mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 16:35:34 +07:00
6848ac7ca3
Use DEFINE_SHOW_ATTRIBUTE() instead of open coding it. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: keescook@chromium.org Cc: luto@kernel.org Cc: peterz@infradead.org Cc: bp@alien8.de Cc: hpa@zytor.com Link: https://lkml.kernel.org/r/20181119154334.18265-1-tiny.windzz@gmail.com
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
#include <linux/debugfs.h>
|
|
#include <linux/efi.h>
|
|
#include <linux/module.h>
|
|
#include <linux/seq_file.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
static int ptdump_show(struct seq_file *m, void *v)
|
|
{
|
|
ptdump_walk_pgd_level_debugfs(m, NULL, false);
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(ptdump);
|
|
|
|
static int ptdump_curknl_show(struct seq_file *m, void *v)
|
|
{
|
|
if (current->mm->pgd) {
|
|
down_read(¤t->mm->mmap_sem);
|
|
ptdump_walk_pgd_level_debugfs(m, current->mm->pgd, false);
|
|
up_read(¤t->mm->mmap_sem);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(ptdump_curknl);
|
|
|
|
#ifdef CONFIG_PAGE_TABLE_ISOLATION
|
|
static struct dentry *pe_curusr;
|
|
|
|
static int ptdump_curusr_show(struct seq_file *m, void *v)
|
|
{
|
|
if (current->mm->pgd) {
|
|
down_read(¤t->mm->mmap_sem);
|
|
ptdump_walk_pgd_level_debugfs(m, current->mm->pgd, true);
|
|
up_read(¤t->mm->mmap_sem);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(ptdump_curusr);
|
|
#endif
|
|
|
|
#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
|
|
static struct dentry *pe_efi;
|
|
|
|
static int ptdump_efi_show(struct seq_file *m, void *v)
|
|
{
|
|
if (efi_mm.pgd)
|
|
ptdump_walk_pgd_level_debugfs(m, efi_mm.pgd, false);
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(ptdump_efi);
|
|
#endif
|
|
|
|
static struct dentry *dir, *pe_knl, *pe_curknl;
|
|
|
|
static int __init pt_dump_debug_init(void)
|
|
{
|
|
dir = debugfs_create_dir("page_tables", NULL);
|
|
if (!dir)
|
|
return -ENOMEM;
|
|
|
|
pe_knl = debugfs_create_file("kernel", 0400, dir, NULL,
|
|
&ptdump_fops);
|
|
if (!pe_knl)
|
|
goto err;
|
|
|
|
pe_curknl = debugfs_create_file("current_kernel", 0400,
|
|
dir, NULL, &ptdump_curknl_fops);
|
|
if (!pe_curknl)
|
|
goto err;
|
|
|
|
#ifdef CONFIG_PAGE_TABLE_ISOLATION
|
|
pe_curusr = debugfs_create_file("current_user", 0400,
|
|
dir, NULL, &ptdump_curusr_fops);
|
|
if (!pe_curusr)
|
|
goto err;
|
|
#endif
|
|
|
|
#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
|
|
pe_efi = debugfs_create_file("efi", 0400, dir, NULL, &ptdump_efi_fops);
|
|
if (!pe_efi)
|
|
goto err;
|
|
#endif
|
|
|
|
return 0;
|
|
err:
|
|
debugfs_remove_recursive(dir);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
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");
|