diff options
author | Andy Lutomirski <luto@amacapital.net> | 2014-10-24 15:58:07 -0700 |
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committer | Sasha Levin <sasha.levin@oracle.com> | 2015-06-28 13:39:27 -0400 |
commit | 8ca6fadf220ab0a1369a667462d8d8c0c5d6ac29 (patch) | |
tree | f0a748c7f889b9dff3d540697ff679229485da86 /arch/x86/platform/efi | |
parent | 4621614dd5115749c2b04c80f0f53861cd93590e (diff) |
x86: Clean up cr4 manipulation
[ Upstream commit 375074cc736ab1d89a708c0a8d7baa4a70d5d476 ]
CR4 manipulation was split, seemingly at random, between direct
(write_cr4) and using a helper (set/clear_in_cr4). Unfortunately,
the set_in_cr4 and clear_in_cr4 helpers also poke at the boot code,
which only a small subset of users actually wanted.
This patch replaces all cr4 access in functions that don't leave cr4
exactly the way they found it with new helpers cr4_set_bits,
cr4_clear_bits, and cr4_set_bits_and_update_boot.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Vince Weaver <vince@deater.net>
Cc: "hillf.zj" <hillf.zj@alibaba-inc.com>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/495a10bdc9e67016b8fd3945700d46cfd5c12c2f.1414190806.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'arch/x86/platform/efi')
0 files changed, 0 insertions, 0 deletions