diff options
| author | Andy Lutomirski <luto@kernel.org> | 2016-04-07 17:31:46 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-13 10:20:41 +0200 |
| commit | 7a5d67048745e3eab62779c6d043a2e3d95dc848 (patch) | |
| tree | c3052c7d6e5b675ced4c3a7edb2f7a6c2c7bb65f /arch/x86/kernel/process_64.c | |
| parent | d47b50e7a111bb7a56fb1c974728b56209d7f515 (diff) | |
x86/cpu: Probe the behavior of nulling out a segment at boot time
AMD and Intel do different things when writing zero to a segment
selector. Since neither vendor documents the behavior well and it's
easy to test the behavior, try nulling fs to see what happens.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-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: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/61588ba0e0df35beafd363dc8b68a4c5878ef095.1460075211.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
0 files changed, 0 insertions, 0 deletions