CONFIG_RISCV_ISA_ZBB: Zbb extension support for bit manipulation instructions

General informations

The Linux kernel configuration item CONFIG_RISCV_ISA_ZBB:

• prompt: Zbb extension support for bit manipulation instructions
• type: bool
• depends on: ( CONFIG_TOOLCHAIN_HAS_ZBB ) && ( CONFIG_MMU ) && ( CONFIG_RISCV_ALTERNATIVE )
• defined in arch/riscv/Kconfig
• found in Linux kernels: 6.3–6.8, 6.9-rc+HEAD

Help text

Adds support to dynamically detect the presence of the ZBB extension (basic bit manipulation) and enable its usage.

The Zbb extension provides instructions to accelerate a number of bit-specific operations (count bit population, sign extending, bitrotation, etc).

If you don't know what to do here, say Y.

Hardware

LKDDb

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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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