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| author |   Kees Cook <keescook@chromium.org> | 2016-05-25 15:45:31 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2016-06-26 12:32:04 +0200 |
| commit | 11fdf97a3cd1a5a27625f820ceb74e1caba4fd26 (patch) | |
| tree | aa28003090795286509f62e8a90137f2d2078df6 /arch/x86/boot/compressed/misc.h | |
| parent | x86/boot: Refuse to build with data relocations (diff) | |
| download | linux-dev-11fdf97a3cd1a5a27625f820ceb74e1caba4fd26.tar.xz linux-dev-11fdf97a3cd1a5a27625f820ceb74e1caba4fd26.zip | |
x86/KASLR: Clarify identity map interface
This extracts the call to prepare_level4() into a top-level function
that the user of the pagetable.c interface must call to initialize
the new page tables. For clarity and to match the "finalize" function,
it has been renamed to initialize_identity_maps(). This function also
gains the initialization of mapping_info so we don't have to do it each
time in add_identity_map().
Additionally add copyright notice to the top, to make it clear that the
bulk of the pagetable.c code was written by Yinghai, and that I just
added bugs later. :)
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1464216334-17200-3-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
| -rw-r--r-- | arch/x86/boot/compressed/misc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index b6fec1ff10e4..09c4ddd02ac6 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -85,10 +85,13 @@ unsigned char *choose_random_location(unsigned long input_ptr, #endif #ifdef CONFIG_X86_64 +void initialize_identity_maps(void); void add_identity_map(unsigned long start, unsigned long size); void finalize_identity_maps(void); extern unsigned char _pgtable[]; #else +static inline void initialize_identity_maps(void) +{ } static inline void add_identity_map(unsigned long start, unsigned long size) { } static inline void finalize_identity_maps(void) |