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)
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.
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.