linux-kernel - Re: [PATCH] LoongArch: Update help info of config ARCH_STRICT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAAhV-H4G4_Xvuy35Ff_deY3FrRAaYGRTYpPR5Ru1=BUMqSb1fA@mail.gmail.com>
Date: Wed, 27 Aug 2025 18:17:38 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc: loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] LoongArch: Update help info of config ARCH_STRICT_ALIGN

Applied, thanks.

Huacai

On Tue, Aug 26, 2025 at 2:39 PM Tiezhu Yang <yangtiezhu@...ngson.cn> wrote:
>
> Loongson 3A6000 and 3C6000 CPUs also support unaligned memory access, so
> the current description is out of date to some extent.
>
> Actually, all of Loongson-3 series processors based on LoongArch support
> unaligned memory access, this hardware capability is indicated by the bit
> 20 of CPUCFG1 register, update the help info to reflect the reality.
>
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> ---
>  arch/loongarch/Kconfig | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> index f0abc38c40ac..fcf6575b02f8 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -563,7 +563,8 @@ config ARCH_STRICT_ALIGN
>           -mstrict-align build parameter to prevent unaligned accesses.
>
>           CPUs with h/w unaligned access support:
> -         Loongson-2K2000/2K3000/3A5000/3C5000/3D5000.
> +         Loongson-2K2000/2K3000 and all of Loongson-3 series processors
> +         based on LoongArch.
>
>           CPUs without h/w unaligned access support:
>           Loongson-2K500/2K1000.
> @@ -573,6 +574,9 @@ config ARCH_STRICT_ALIGN
>           to run kernel only on systems with h/w unaligned access support in
>           order to optimise for performance.
>
> +         If you want to make sure whether to support unaligned memory access
> +         on your hardware, please read the bit 20 of CPUCFG1 register.
> +
>  config CPU_HAS_FPU
>         bool
>         default y
> --
> 2.42.0
>
>