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

Borislav Petkov
2022-01-27T11:56:38Z

From: Borislav Petkov <bp@suse.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