Follow the planning doc for more info [planning doc](https://docs.google.com/document/d/1cux90hElHyX36Sfyp8-hS3FQ8t0lH8sED4ILTD51HKo/edit?pli=1&tab=t.0#heading=h.ga0sq165ski0) RISC-V spec for `Zbkb`: https://docs.riscv.org/reference/isa/v20260120/unpriv/b-st-ext.html#zbkb
Follow the planning doc for more info planning doc
RISC-V spec for
Zbkb: https://docs.riscv.org/reference/isa/v20260120/unpriv/b-st-ext.html#zbkb