From: Heiko Stuebner <heiko.stuebner@xxxxxxxx> Similar to Zbb add a Zbc option to allow making further functionality depend on it. Signed-off-by: Heiko Stuebner <heiko.stuebner@xxxxxxxx> --- arch/riscv/Kconfig | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 4c07b9189c86..cb5bd47c50c9 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -531,6 +531,29 @@ config RISCV_ISA_ZBB If you don't know what to do here, say Y. +config TOOLCHAIN_HAS_ZBC + bool + default y + depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zbc) + depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zbc) + depends on LLD_VERSION >= 150000 || LD_VERSION >= 23900 + depends on AS_HAS_OPTION_ARCH + +config RISCV_ISA_ZBC + bool "Zbc extension support for bit manipulation instructions" + depends on TOOLCHAIN_HAS_ZBC + depends on MMU + depends on RISCV_ALTERNATIVE + default y + help + Adds support to dynamically detect the presence of the ZBC + extension (carry-less multiplication) and enable its usage. + + The Zbc extension provides instructions clmul, clmulh and clmulr + to accelerate carry-less multiplications. + + If you don't know what to do here, say Y. + config RISCV_ISA_ZICBOM bool "Zicbom extension support for non-coherent DMA operation" depends on MMU -- 2.39.2
