diff options
| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2025-09-18 19:43:42 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-25 11:13:45 +0200 |
| commit | 1766f14c8f97159845737f808ed7875e2b2563b3 (patch) | |
| tree | 6ed9d2c0aa5ce62265a5878861f942716459365b | |
| parent | cbb8cd66d0bc2021b9594ae18edc3f027375455f (diff) | |
LoongArch: Update help info of ARCH_STRICT_ALIGN
commit f5003098e2f337d8e8a87dc636250e3fa978d9ad upstream.
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the current description is out of date to some extent.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 (UAL) of CPUCFG1 register, update the help info to reflect the reality.
Cc: stable@vger.kernel.org
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/loongarch/Kconfig | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index a7a1f15bcc67..5f35a8bd8996 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -540,10 +540,14 @@ 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. + Loongson-2K0300/2K0500/2K1000. + + If you want to make sure whether to support unaligned memory access + on your hardware, please read the bit 20 (UAL) of CPUCFG1 register. 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 |