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From: Petr Tesarik <ptesarik@suse.com>
To: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Nikolay Borisov <nik.borisov@suse.com>,
	x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
	linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT
	AND 64-BIT)), Petr Tesarik <ptesarik@suse.com>
Subject: [PATCH v3 0/2] x86/tsx: Improve handling of the tsx= kernel parameter
Date: Wed, 22 Oct 2025 12:26:11 +0200	[thread overview]
Message-ID: <cover.1761127696.git.ptesarik@suse.com> (raw)

Parse the tsx= kernel parameter with early_param(), so it is not
reported as unknown.

As a side note, it was not necessary to defer the handling of
tsx=auto. Contrary to Pawan's claim, cpu_set_bug_bits() is called
from setup_arch() via early_cpu_init() and early_identify_cpu() before
parse_early_param(). But it is a nice cleanup, nevertheless, and I
learned something about parsing the command line. Cf. the NAK here:
https://lore.kernel.org/all/20251009185134.fb4evjrk76rwxv37@desk/

Changes from v2:
* compile-time initialization with the configured default
* defer tsx=auto handling to tsx_init()
* add more detail to the commit message

Changes from v1:
* make tsx_ctrl_state local to tsx.c
* use early_param() instead of core_param()

Petr Tesarik (2):
  x86/tsx: Make tsx_ctrl_state static
  x86/tsx: Get the tsx= command line parameter with early_param()

 arch/x86/kernel/cpu/cpu.h |  9 ------
 arch/x86/kernel/cpu/tsx.c | 59 ++++++++++++++++++++++-----------------
 2 files changed, 34 insertions(+), 34 deletions(-)

-- 
2.51.0


             reply	other threads:[~2025-10-22 10:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-22 10:26 Petr Tesarik [this message]
2025-10-22 10:26 ` [PATCH v3 1/2] x86/tsx: Make tsx_ctrl_state static Petr Tesarik
2025-10-22 10:26 ` [PATCH v3 2/2] x86/tsx: Get the tsx= command line parameter with early_param() Petr Tesarik
2025-10-22 17:46   ` Pawan Gupta
2025-10-23  6:45     ` Petr Tesarik
2025-10-23 16:05       ` Pawan Gupta

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