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.a...@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
--
2.17.2
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