• Thomas Gleixner's avatar
    x86/mm/dump_pagetables: Allow dumping current pagetables · a4b51ef6
    Thomas Gleixner authored
    Add two debugfs files which allow to dump the pagetable of the current
    task.
    
    current_kernel dumps the regular page table. This is the page table which
    is normally shared between kernel and user space. If kernel page table
    isolation is enabled this is the kernel space mapping.
    
    If kernel page table isolation is enabled the second file, current_user,
    dumps the user space page table.
    
    These files allow to verify the resulting page tables for page table
    isolation, but even in the normal case its useful to be able to inspect
    user space page tables of current for debugging purposes.
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: David Laight <David.Laight@aculab.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: Eduardo Valentin <eduval@amazon.com>
    Cc: Greg KH <gregkh@linuxfoundation.org>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: aliguori@amazon.com
    Cc: daniel.gruss@iaik.tugraz.at
    Cc: hughd@google.com
    Cc: keescook@google.com
    Cc: linux-mm@kvack.org
    Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    a4b51ef6
debug_pagetables.c 2.56 KB