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Message-ID: <20240331180042.13933-1-bp@alien8.de>
Date: Sun, 31 Mar 2024 20:00:38 +0200
From: Borislav Petkov <bp@...en8.de>
To: X86 ML <x86@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 0/4] x86/alternatives: Do NOPs optimization on a temporary buffer
From: "Borislav Petkov (AMD)" <bp@...en8.de>
Hi,
here's v2 of the set to do NOPs optimizations on a temporary buffer
after the last-minute conflict and resulting breakage before the last
merge window which made me retract those.
This v2 has been extensively tested on 6.9-rc1.
Thx.
Changelog:
=========
v0:
here's a small set which sprang out from my reacting to the fact that
NOPs optimization in the alternatives code needs to happen on
a temporary buffer like the other alternative operations - not in-place
and cause all kinds of fun.
The result is this, which makes the alternatives code simpler and it is
a net win, size-wise:
1 file changed, 50 insertions(+), 72 deletions(-)
Constructive feedback is always welcome!
Borislav Petkov (AMD) (4):
x86/alternatives: Use a temporary buffer when optimizing NOPs
x86/alternatives: Get rid of __optimize_nops()
x86/alternatives: Optimize optimize_nops()
x86/alternatives: Sort local vars in apply_alternatives()
arch/x86/include/asm/text-patching.h | 2 +-
arch/x86/kernel/alternative.c | 133 ++++++++++++---------------
arch/x86/kernel/callthunks.c | 9 +-
3 files changed, 62 insertions(+), 82 deletions(-)
--
2.43.0
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