linux-kernel - Re: [PATCH 1/3] x86: Introduce ia32

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Message-ID: <87r0qnk5wk.ffs@tglx>
Date:   Wed, 07 Jun 2023 10:55:55 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Nikolay Borisov <nik.borisov@...e.com>, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, mhocko@...e.com, jslaby@...e.cz,
        Nikolay Borisov <nik.borisov@...e.com>
Subject: Re: [PATCH 1/3] x86: Introduce ia32_disabled boot parameter

On Wed, Jun 07 2023 at 10:29, Nikolay Borisov wrote:
> Distributions would like to reduce their attack surface as much as
> possible but at the same time they have to cater to a wide variety of
> legacy software. One such avenue where distros have to strike a balance
> is the support for 32bit syscalls on a 64bit kernel. Ideally we'd have
> the ability to disable the the compat support at boot time. This would
> allow the decision whether it should be disabled/enabled can be
> delegated to system administrators.
>
> This patch simply introduces ia32_disable boot parameter which aims at

https://www.kernel.org/doc/html/latest/process/maintainer-tip.html

> disabling 32 bit process support even if CONFIG_IA32_EMULATION has been
> selected at build time.
>
> Signed-off-by: Nikolay Borisov <nik.borisov@...e.com>
> ---
>  arch/x86/entry/common.c      | 12 ++++++++++++
>  arch/x86/include/asm/traps.h |  4 ++++

New command line parameters require documentation.

https://www.kernel.org/doc/html/latest/process/

Thanks,

        tglx