Commit-ID: 36a39ac967a548154a0fe44d71cb0063fa05010f Gitweb: http://git.kernel.org/tip/36a39ac967a548154a0fe44d71cb0063fa05010f Author: Borislav Petkov <[email protected]> AuthorDate: Sat, 7 May 2016 11:59:40 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 10 May 2016 10:12:02 +0200
x86/boot: Comment what finalize_identity_maps() does So it is not really obvious that finalize_identity_maps() doesn't do any finalization but it *actually* writes CR3 with the ident PGD. Comment that at the call site. Signed-off-by: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Kees Cook <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/boot/compressed/kaslr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index f82975b..f5a138c 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -437,6 +437,8 @@ unsigned char *choose_random_location(unsigned long input, choice = random_addr; add_identity_map(choice, output_size); + + /* This actually loads the identity pagetable on x86_64. */ finalize_identity_maps(); out: return (unsigned char *)choice;
