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ca5999fde0
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>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/debugfs.h>
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#include <linux/efi.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/pgtable.h>
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static int ptdump_show(struct seq_file *m, void *v)
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{
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ptdump_walk_pgd_level_debugfs(m, &init_mm, false);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ptdump);
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static int ptdump_curknl_show(struct seq_file *m, void *v)
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{
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if (current->mm->pgd)
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ptdump_walk_pgd_level_debugfs(m, current->mm, false);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ptdump_curknl);
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#ifdef CONFIG_PAGE_TABLE_ISOLATION
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static int ptdump_curusr_show(struct seq_file *m, void *v)
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{
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if (current->mm->pgd)
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ptdump_walk_pgd_level_debugfs(m, current->mm, true);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ptdump_curusr);
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#endif
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#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
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static int ptdump_efi_show(struct seq_file *m, void *v)
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{
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if (efi_mm.pgd)
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ptdump_walk_pgd_level_debugfs(m, &efi_mm, false);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ptdump_efi);
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#endif
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static struct dentry *dir;
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static int __init pt_dump_debug_init(void)
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{
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dir = debugfs_create_dir("page_tables", NULL);
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debugfs_create_file("kernel", 0400, dir, NULL, &ptdump_fops);
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debugfs_create_file("current_kernel", 0400, dir, NULL,
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&ptdump_curknl_fops);
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#ifdef CONFIG_PAGE_TABLE_ISOLATION
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debugfs_create_file("current_user", 0400, dir, NULL,
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&ptdump_curusr_fops);
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#endif
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#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
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debugfs_create_file("efi", 0400, dir, NULL, &ptdump_efi_fops);
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#endif
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return 0;
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}
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static void __exit pt_dump_debug_exit(void)
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{
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debugfs_remove_recursive(dir);
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}
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module_init(pt_dump_debug_init);
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module_exit(pt_dump_debug_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
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MODULE_DESCRIPTION("Kernel debugging helper that dumps pagetables");
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