linux-kernel - [PATCH v2 0/6] x86/cpu: Do some janitorial work

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Date:   Thu, 27 Jan 2022 12:56:20 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     X86 ML <x86@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 0/6] x86/cpu: Do some janitorial work

From: Borislav Petkov <bp@...e.de>

Hi all,

here's v2 with some adjustments due to dependent changes which went
upstream, in the meantime. I figure I should send them out one more time
before I queue them.

Also, patch 1 handles printing of naked feature numbers for which we
don't generate a string for /proc/cpuinfo now too.

Thx.

changelog:
----------

v1
--

Beef up clearcpuid= so that it supports the strings from /proc/cpuinfo
too and remove a bunch of useless, and, in some cases even downright
dangerous, chicken bits we have added over the years.

Borislav Petkov (6):
  x86/cpu: Allow feature bit names from /proc/cpuinfo in clearcpuid=
  x86/cpu: Remove "nosep"
  x86/cpu: Remove CONFIG_X86_SMAP and "nosmap"
  x86/cpu: Remove "nosmep"
  x86/cpu: Remove "noexec"
  x86/cpu: Remove "noclflush"

 .../admin-guide/kernel-parameters.txt         | 24 ++---
 Documentation/x86/cpuinfo.rst                 |  5 +-
 Documentation/x86/x86_64/boot-options.rst     |  9 --
 arch/x86/Kconfig                              | 11 ---
 arch/x86/include/asm/cpufeature.h             |  7 +-
 arch/x86/include/asm/disabled-features.h      |  8 +-
 arch/x86/include/asm/proto.h                  |  1 -
 arch/x86/include/asm/smap.h                   | 24 -----
 arch/x86/kernel/cpu/common.c                  | 94 +++++++++----------
 arch/x86/kernel/setup.c                       | 28 +++++-
 arch/x86/mm/Makefile                          |  3 +-
 arch/x86/mm/init_64.c                         |  1 -
 arch/x86/mm/setup_nx.c                        | 62 ------------
 scripts/Makefile.build                        |  1 -
 scripts/link-vmlinux.sh                       |  3 -
 .../arch/x86/include/asm/disabled-features.h  |  8 +-
 16 files changed, 91 insertions(+), 198 deletions(-)
 delete mode 100644 arch/x86/mm/setup_nx.c

-- 
2.29.2