• Dave Hansen's avatar
    x86/espfix: Document use of _PAGE_GLOBAL · 6baf4bec
    Dave Hansen authored
    The "normal" kernel page table creation mechanisms using
    PAGE_KERNEL_* page protections will never set _PAGE_GLOBAL with PTI.
    The few places in the kernel that always want _PAGE_GLOBAL must
    avoid using PAGE_KERNEL_*.
    
    Document that we want it here and its use is not accidental.
    Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
    Cc: Andrea Arcangeli <aarcange@redhat.com>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Arjan van de Ven <arjan@linux.intel.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: David Woodhouse <dwmw2@infradead.org>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Hugh Dickins <hughd@google.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: Kees Cook <keescook@google.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Nadav Amit <namit@vmware.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: linux-mm@kvack.org
    Link: http://lkml.kernel.org/r/20180406205507.BCF4D4F0@viggo.jf.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    6baf4bec
espfix_64.c 6.6 KB