riscv: add ISA extension parsing for Ztso

Add support to parse the Ztso string in the riscv,isa string. The
bindings already supports it but not the ISA parsing code.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20231220155723.684081-2-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 2438d4685da67131b1a521a6d6e8a82736948fa8..3b31efe2f716d883beaa8ed686ebebc558e8e054 100644 (file)
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -84,6 +84,7 @@
 #define RISCV_ISA_EXT_ZVFH             69
 #define RISCV_ISA_EXT_ZVFHMIN          70
 #define RISCV_ISA_EXT_ZFA              71
+#define RISCV_ISA_EXT_ZTSO             72
 
 #define RISCV_ISA_EXT_MAX              128
 #define RISCV_ISA_EXT_INVALID          U32_MAX

diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index dc0ab3e97cd28a67eb32f621328523a10b98900c..3eb48a0eecb3e8a721f81e54cb8ae05825e0459e 100644 (file)
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -279,6 +279,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
        __RISCV_ISA_EXT_DATA(zkt, RISCV_ISA_EXT_ZKT),
        __RISCV_ISA_EXT_DATA(zksed, RISCV_ISA_EXT_ZKSED),
        __RISCV_ISA_EXT_DATA(zksh, RISCV_ISA_EXT_ZKSH),
+       __RISCV_ISA_EXT_DATA(ztso, RISCV_ISA_EXT_ZTSO),
        __RISCV_ISA_EXT_SUPERSET(zvbb, RISCV_ISA_EXT_ZVBB, riscv_zvbb_exts),
        __RISCV_ISA_EXT_DATA(zvbc, RISCV_ISA_EXT_ZVBC),
        __RISCV_ISA_EXT_DATA(zvfh, RISCV_ISA_EXT_ZVFH),