Add Kconfig entries for the C (compressed instructions) and A (atomic instructions) ISA extensions. Only the C ISA extension is selectable. This matches the configuration in Linux.
The Kconfig entries are not used yet. A follow-up patch will select the appropriate compiler flags based on the Kconfig configuration.
Signed-off-by: Lukas Auer lukas.auer@aisec.fraunhofer.de ---
arch/riscv/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index b81e0d990a..e15329c35e 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -38,6 +38,15 @@ config ARCH_RV64I
endchoice
+config RISCV_ISA_C + bool "Emit compressed instructions" + default y + help + This enables the compressed instructions ("C") ISA extension. + +config RISCV_ISA_A + def_bool y + config 32BIT bool