[PATCH 02/10] riscv: add ISA parsing for Zca, Zcf, Zcd and Zcb

[Clément Léger]

The Zc* standard extension for code reduction introduces new extensions.
This patch adds support for Zca, Zcf, Zcd and Zcb. Zce, Zcmt and Zcmp
are left out of this patch since they are targeting microcontrollers/
embedded CPUs instead of application processors.

Signed-off-by: Clément Léger <cle...@rivosinc.com>
---
 arch/riscv/include/asm/hwcap.h | 4 ++++
 arch/riscv/kernel/cpufeature.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 543e3ea2da0e..b7551bad341b 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -82,6 +82,10 @@
 #define RISCV_ISA_EXT_ZACAS            73
 #define RISCV_ISA_EXT_XANDESPMU                74
 #define RISCV_ISA_EXT_ZIMOP            75
+#define RISCV_ISA_EXT_ZCA              76
+#define RISCV_ISA_EXT_ZCB              77
+#define RISCV_ISA_EXT_ZCD              78
+#define RISCV_ISA_EXT_ZCF              79
 
 #define RISCV_ISA_EXT_XLINUXENVCFG     127
 
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 115ba001f1bc..09dee071274d 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -261,6 +261,10 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
        __RISCV_ISA_EXT_DATA(zfa, RISCV_ISA_EXT_ZFA),
        __RISCV_ISA_EXT_DATA(zfh, RISCV_ISA_EXT_ZFH),
        __RISCV_ISA_EXT_DATA(zfhmin, RISCV_ISA_EXT_ZFHMIN),
+       __RISCV_ISA_EXT_DATA(zca, RISCV_ISA_EXT_ZCA),
+       __RISCV_ISA_EXT_DATA(zcb, RISCV_ISA_EXT_ZCB),
+       __RISCV_ISA_EXT_DATA(zcd, RISCV_ISA_EXT_ZCD),
+       __RISCV_ISA_EXT_DATA(zcf, RISCV_ISA_EXT_ZCF),
        __RISCV_ISA_EXT_DATA(zba, RISCV_ISA_EXT_ZBA),
        __RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
        __RISCV_ISA_EXT_DATA(zbc, RISCV_ISA_EXT_ZBC),
-- 
2.43.0