CONFIG_ARCH_STRICT_ALIGN: Enable -mstrict-align to prevent unaligned accesses

General informations

The Linux kernel configuration item CONFIG_ARCH_STRICT_ALIGN:

• prompt: Enable -mstrict-align to prevent unaligned accesses
• type: bool
• depends on: CONFIG_EXPERT
• defined in arch/loongarch/Kconfig
• found in Linux kernels: 6.3–6.8, 6.9-rc+HEAD

Help text

Not all LoongArch cores support h/w unaligned access, we can use -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.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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