diff options
| author | Borislav Petkov <bp@suse.de> | 2016-05-07 11:59:40 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-05-10 10:12:02 +0200 |
| commit | 36a39ac967a548154a0fe44d71cb0063fa05010f (patch) | |
| tree | 29f60f71e430dd277a1bb2b0ab2600680721d2d8 /arch/x86/boot/compressed/kaslr.c | |
| parent | 3a94707d7a7bb1eb82acae5fbc035247dd1ba8a5 (diff) | |
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 <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: akpm@linux-foundation.org
Cc: bhe@redhat.com
Cc: dyoung@redhat.com
Cc: jkosina@suse.cz
Cc: linux-tip-commits@vger.kernel.org
Cc: luto@kernel.org
Cc: vgoyal@redhat.com
Cc: yinghai@kernel.org
Link: http://lkml.kernel.org/r/20160507100541.GA24613@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot/compressed/kaslr.c')
| -rw-r--r-- | arch/x86/boot/compressed/kaslr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index f82975b0f9d6..f5a138c3fe96 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; |