From: "Arnd Bergmann" <arnd@arndb.de>
To: "Huacai Chen" <chenhuacai@loongson.cn>,
"Huacai Chen" <chenhuacai@kernel.org>
Cc: loongarch@lists.linux.dev,
Linux-Arch <linux-arch@vger.kernel.org>,
"Xuefeng Li" <lixuefeng@loongson.cn>, guoren <guoren@kernel.org>,
"WANG Xuerui" <kernel@xen0n.name>,
"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2] LoongArch: Make -mstrict-align configurable
Date: Wed, 08 Feb 2023 15:08:31 +0100 [thread overview]
Message-ID: <93dbbc7c-0e0d-4ae0-98fa-0d611ccd73d6@app.fastmail.com> (raw)
In-Reply-To: <20230208140536.2911880-1-chenhuacai@loongson.cn>
On Wed, Feb 8, 2023, at 15:05, Huacai Chen wrote:
> Introduce Kconfig option ARCH_STRICT_ALIGN to make -mstrict-align be
> configurable.
>
> Not all LoongArch cores support h/w unaligned access, we can use the
> -mstrict-align build parameter to prevent unaligned accesses.
>
> CPUs with h/w unaligned access support:
> Loongson-2K2000/2K3000/3A5000/3C5000/3D5000.
>
> CPUs without h/w unaligned access support:
> Loongson-2K500/2K1000.
>
> This option is enabled by default to make the kernel be able to run on
> all LoongArch systems. But you can disable it manually if you want to
> run kernel only on systems with h/w unaligned access support in order to
> optimise for performance.
>
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
prev parent reply other threads:[~2023-02-08 14:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-08 14:05 [PATCH V2] LoongArch: Make -mstrict-align configurable Huacai Chen
2023-02-08 14:08 ` Arnd Bergmann [this message]
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