linux/arch/x86/mm/debug_pagetables.c
Mike Rapoport ca5999fde0 mm: introduce include/linux/pgtable.h
The include/linux/pgtable.h is going to be the home of generic page table
manipulation functions.

Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and
make the latter include asm/pgtable.h.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-09 09:39:13 -07:00

77 lines
1.8 KiB
C

// 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");