]> git.baikalelectronics.ru Git - kernel.git/commit
x86/entry/64: Interleave XOR register clearing with PUSH instructions
authorDominik Brodowski <linux@dominikbrodowski.net>
Sun, 11 Feb 2018 10:49:44 +0000 (11:49 +0100)
committerIngo Molnar <mingo@kernel.org>
Tue, 13 Feb 2018 08:04:53 +0000 (09:04 +0100)
commitc01491526165a97b052ee05cb5c0daf0884790a0
tree376d948cc86ebb186e30ec8c36bc9dfedf8e1271
parent0395b435c375352fb39fcc2db8b6bb4034a47bf4
x86/entry/64: Interleave XOR register clearing with PUSH instructions

Same as is done for syscalls, interleave XOR with PUSH instructions
for exceptions/interrupts, in order to minimize the cost of the
additional instructions required for register clearing.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Andy Lutomirski <luto@kernel.org>
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: 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: dan.j.williams@intel.com
Link: http://lkml.kernel.org/r/20180211104949.12992-4-linux@dominikbrodowski.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/entry/calling.h
arch/x86/entry/entry_64.S