[PATCH v1 02/13] riscv: add ISA extension probing for Zv* extensions

["Clément Léger" <cleger@rivosinc.com>]

Add probing of some Zv* ISA extensions that are mentioned in "RISC-V
Cryptography Extensions Volume II" [1]. These ISA extensions are the
following:

- Zvbb: Vector Basic Bit-manipulation
- Zvbc: Vector Carryless Multiplication
- Zvkb: Vector Cryptography Bit-manipulation
- Zvkg: Vector GCM/GMAC.
- Zvkned: NIST Suite: Vector AES Block Cipher
- Zvknh[ab]: NIST Suite: Vector SHA-2 Secure Hash
- Zvksed: ShangMi Suite: SM4 Block Cipher
- Zvksh: ShangMi Suite: SM3 Secure Hash
- Zvkn: NIST Algorithm Suite
- Zvknc: NIST Algorithm Suite with carryless multiply
- Zvkng: NIST Algorithm Suite with GCM.
- Zvks: ShangMi Algorithm Suite
- Zvksc: ShangMi Algorithm Suite with carryless multiplication
- Zvksg: ShangMi Algorithm Suite with GCM.
- Zvkt: Vector Data-Independent Execution Latency.

[1] https://drive.google.com/file/d/1gb9OLH-DhbCgWp7VwpPOVrrY6f3oSJLL/view

Signed-off-by: Clément Léger <cleger@rivosinc.com>
---
 arch/riscv/include/asm/hwcap.h | 16 ++++++++++++++++
 arch/riscv/kernel/cpufeature.c | 16 ++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index b7b58258f6c7..4e46981ac6c8 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -58,6 +58,22 @@
 #define RISCV_ISA_EXT_ZICSR		40
 #define RISCV_ISA_EXT_ZIFENCEI		41
 #define RISCV_ISA_EXT_ZIHPM		42
+#define RISCV_ISA_EXT_ZVBB		43
+#define RISCV_ISA_EXT_ZVBC		44
+#define RISCV_ISA_EXT_ZVKB		45
+#define RISCV_ISA_EXT_ZVKG		46
+#define RISCV_ISA_EXT_ZVKN		47
+#define RISCV_ISA_EXT_ZVKNC		48
+#define RISCV_ISA_EXT_ZVKNED		49
+#define RISCV_ISA_EXT_ZVKNG		50
+#define RISCV_ISA_EXT_ZVKNHA		51
+#define RISCV_ISA_EXT_ZVKNHB		52
+#define RISCV_ISA_EXT_ZVKS		53
+#define RISCV_ISA_EXT_ZVKSC		54
+#define RISCV_ISA_EXT_ZVKSED		55
+#define RISCV_ISA_EXT_ZVKSH		56
+#define RISCV_ISA_EXT_ZVKSG		57
+#define RISCV_ISA_EXT_ZVKT		58
 
 #define RISCV_ISA_EXT_MAX		64
 
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 1cfbba65d11a..859d647f3ced 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -174,6 +174,22 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
 	__RISCV_ISA_EXT_DATA(zba, RISCV_ISA_EXT_ZBA),
 	__RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
 	__RISCV_ISA_EXT_DATA(zbs, RISCV_ISA_EXT_ZBS),
+	__RISCV_ISA_EXT_DATA(zvbb, RISCV_ISA_EXT_ZVBB),
+	__RISCV_ISA_EXT_DATA(zvbc, RISCV_ISA_EXT_ZVBC),
+	__RISCV_ISA_EXT_DATA(zvkb, RISCV_ISA_EXT_ZVKB),
+	__RISCV_ISA_EXT_DATA(zvkg, RISCV_ISA_EXT_ZVKG),
+	__RISCV_ISA_EXT_DATA(zvkn, RISCV_ISA_EXT_ZVKN),
+	__RISCV_ISA_EXT_DATA(zvknc, RISCV_ISA_EXT_ZVKNC),
+	__RISCV_ISA_EXT_DATA(zvkned, RISCV_ISA_EXT_ZVKNED),
+	__RISCV_ISA_EXT_DATA(zvkng, RISCV_ISA_EXT_ZVKNG),
+	__RISCV_ISA_EXT_DATA(zvknha, RISCV_ISA_EXT_ZVKNHA),
+	__RISCV_ISA_EXT_DATA(zvknhb, RISCV_ISA_EXT_ZVKNHB),
+	__RISCV_ISA_EXT_DATA(zvks, RISCV_ISA_EXT_ZVKS),
+	__RISCV_ISA_EXT_DATA(zvksc, RISCV_ISA_EXT_ZVKSC),
+	__RISCV_ISA_EXT_DATA(zvksed, RISCV_ISA_EXT_ZVKSED),
+	__RISCV_ISA_EXT_DATA(zvksh, RISCV_ISA_EXT_ZVKSH),
+	__RISCV_ISA_EXT_DATA(zvksg, RISCV_ISA_EXT_ZVKSG),
+	__RISCV_ISA_EXT_DATA(zvkt, RISCV_ISA_EXT_ZVKT),
 	__RISCV_ISA_EXT_DATA(smaia, RISCV_ISA_EXT_SMAIA),
 	__RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA),
 	__RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
-- 
2.42.0