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CONFIG_PPC_64S_HASH_MMU: Hash MMU Support

General informations

The Linux kernel configuration item CONFIG_PPC_64S_HASH_MMU:

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Enable support for the Power ISA Hash style MMU. This is implemented by all IBM Power and other 64-bit Book3S CPUs before ISA v3.0. The OpenPOWER ISA does not mandate the hash MMU and some CPUs do not implement it (e.g., Microwatt).

Note that POWER9 PowerVM platforms only support the hash MMU. From POWER10 radix is also supported by PowerVM.

If you're unsure, say Y.

Hardware

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