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authorHuacai Chen <chenhuacai@loongson.cn>2023-02-25 15:52:56 +0800
committerHuacai Chen <chenhuacai@loongson.cn>2023-02-25 22:12:16 +0800
commit41596803302d83a67a80dc1efef4e51ac46acabb (patch)
tree91fb727f636ae6d72b1f0653567edd861c1afa9e /arch/loongarch/kernel/entry.S
parentbb7a78e343468873bf00b2b181fcfd3c02d8cb56 (diff)
LoongArch: Make -mstrict-align configurable
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. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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