From: "Xin Li (Intel)" <xin@zytor.com>
To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
will@kernel.org, peterz@infradead.org, akpm@linux-foundation.org,
acme@kernel.org, namhyung@kernel.org
Subject: [PATCH v1 0/3] x86/cpufeatures: Automatically generate required and disabled feature masks
Date: Wed, 31 Jan 2024 21:46:26 -0800 [thread overview]
Message-ID: <20240201054629.3816748-1-xin@zytor.com> (raw)
When a CPU feature is not configured, e.g., CONFIG_X86_FRED=n, in a
build config, its feature disable flag, e.g. DISABLE_FRED, needs to
be defined and added to a specific disabled CPU features mask in
<asm/disabled-features.h>, as the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/fred&id=e554a8ca49d6d6d782f546ae4d7f036946e7dd87
This patch set adds an awk script to automatically generate a header
with required and disabled CPU features masks based on build config.
H. Peter Anvin (Intel) (2):
x86/cpufeatures: Add {required,disabled} feature configs
x86/cpufeatures: Generate a feature mask header based on build config
Xin Li (Intel) (1):
x86/cpufeatures: Remove {disabled,required}-features.h
arch/x86/Kconfig | 4 +-
arch/x86/Kconfig.cpu | 16 +-
arch/x86/Kconfig.cpufeatures | 149 +++++++++++++++++
arch/x86/Makefile | 17 +-
arch/x86/boot/cpucheck.c | 3 +-
arch/x86/boot/cpuflags.c | 1 -
arch/x86/boot/mkcpustr.c | 3 +-
arch/x86/include/asm/Kbuild | 1 +
arch/x86/include/asm/asm-prototypes.h | 2 +-
arch/x86/include/asm/atomic64_32.h | 2 +-
arch/x86/include/asm/bitops.h | 4 +-
arch/x86/include/asm/cmpxchg_32.h | 4 +-
arch/x86/include/asm/cpufeature.h | 1 +
arch/x86/include/asm/cpufeatures.h | 8 -
arch/x86/include/asm/disabled-features.h | 154 ------------------
arch/x86/include/asm/required-features.h | 104 ------------
arch/x86/kernel/verify_cpu.S | 1 +
arch/x86/lib/Makefile | 2 +-
arch/x86/lib/cmpxchg8b_emu.S | 2 +-
arch/x86/tools/featuremasks.awk | 108 ++++++++++++
lib/atomic64_test.c | 2 +-
tools/arch/x86/include/asm/cpufeatures.h | 8 -
.../arch/x86/include/asm/disabled-features.h | 154 ------------------
.../arch/x86/include/asm/required-features.h | 104 ------------
tools/perf/check-headers.sh | 2 -
25 files changed, 303 insertions(+), 553 deletions(-)
create mode 100644 arch/x86/Kconfig.cpufeatures
delete mode 100644 arch/x86/include/asm/disabled-features.h
delete mode 100644 arch/x86/include/asm/required-features.h
create mode 100755 arch/x86/tools/featuremasks.awk
delete mode 100644 tools/arch/x86/include/asm/disabled-features.h
delete mode 100644 tools/arch/x86/include/asm/required-features.h
base-commit: 078b7b997b47c7166c1240cf1d39db9f646a56be
--
2.43.0
next reply other threads:[~2024-02-01 5:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-01 5:46 Xin Li (Intel) [this message]
2024-02-01 5:46 ` [PATCH v1 1/3] x86/cpufeatures: Add {required,disabled} feature configs Xin Li (Intel)
2024-02-01 5:46 ` [PATCH v1 2/3] x86/cpufeatures: Generate a feature mask header based on build config Xin Li (Intel)
2024-02-01 5:46 ` [PATCH v1 3/3] x86/cpufeatures: Remove {disabled,required}-features.h Xin Li (Intel)
2024-03-18 17:01 ` [PATCH v1 0/3] x86/cpufeatures: Automatically generate required and disabled feature masks Xin Li
2024-03-18 17:08 ` H. Peter Anvin
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