CONFIG_RISCV_ISA_ZBB is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv
Zbb extension support for bit manipulation instructions
configname: CONFIG_RISCV_ISA_ZBB
Linux Kernel Configuration
└─>Platform type
└─>Zbb extension support for bit manipulation instructions
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
Add support for enabling optimisations in the kernel when the
Zbb extension is detected at boot. Some optimisations may
additionally depend on toolchain support for Zbb.
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.
Zbb extension is detected at boot. Some optimisations may
additionally depend on toolchain support for Zbb.
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.