[PATCH v4 04/20] riscv: hwprobe: add support for scalar crypto ISA extensions

[Clément Léger]

Export the following scalar crypto extensions through hwprobe:

- Zbkb
- Zbkc
- Zbkx
- Zknd
- Zkne
- Zknh
- Zksed
- Zksh
- Zkt

Signed-off-by: Clément Léger <cleger at rivosinc.com>
---
 Documentation/arch/riscv/hwprobe.rst  | 27 +++++++++++++++++++++++++++
 arch/riscv/include/uapi/asm/hwprobe.h |  9 +++++++++
 arch/riscv/kernel/sys_riscv.c         | 10 ++++++++++
 3 files changed, 46 insertions(+)

diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
index 3f71da935a65..3a18a31e32c3 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -83,6 +83,33 @@ The following keys are defined:
   * :c:macro:`RISCV_HWPROBE_EXT_ZBC` The Zbc extension is supported, as defined
        in version 1.0 of the Bit-Manipulation ISA extensions.
 
+  * :c:macro:`RISCV_HWPROBE_EXT_ZBKB` The Zbkb extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZBKC` The Zbkc extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZBKX` The Zbkx extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZKND` The Zknd extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZKNE` The Zkne extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZKNH` The Zknh extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZKSED` The Zksed extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZKSH` The Zksh extension is supported, as
+       defined in version 1.0 of the Scalar Crypto ISA extensions.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZKT` The Zkt extension is supported, as defined
+       in version 1.0 of the Scalar Crypto ISA extensions.
+
 * :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: A bitmask that contains performance
   information about the selected set of processors.
 
diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h
index aca5abc7ebee..624abd5cde29 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -31,6 +31,15 @@ struct riscv_hwprobe {
 #define		RISCV_HWPROBE_EXT_ZBS		(1 << 5)
 #define		RISCV_HWPROBE_EXT_ZICBOZ	(1 << 6)
 #define		RISCV_HWPROBE_EXT_ZBC		(1 << 7)
+#define		RISCV_HWPROBE_EXT_ZBKB		(1 << 8)
+#define		RISCV_HWPROBE_EXT_ZBKC		(1 << 9)
+#define		RISCV_HWPROBE_EXT_ZBKX		(1 << 10)
+#define		RISCV_HWPROBE_EXT_ZKND		(1 << 11)
+#define		RISCV_HWPROBE_EXT_ZKNE		(1 << 12)
+#define		RISCV_HWPROBE_EXT_ZKNH		(1 << 13)
+#define		RISCV_HWPROBE_EXT_ZKSED		(1 << 14)
+#define		RISCV_HWPROBE_EXT_ZKSH		(1 << 15)
+#define		RISCV_HWPROBE_EXT_ZKT		(1 << 16)
 #define RISCV_HWPROBE_KEY_CPUPERF_0	5
 #define		RISCV_HWPROBE_MISALIGNED_UNKNOWN	(0 << 0)
 #define		RISCV_HWPROBE_MISALIGNED_EMULATED	(1 << 0)
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index 7a40145e9628..43aa66e71418 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -163,6 +163,16 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 		EXT_KEY(ZBS);
 		EXT_KEY(ZICBOZ);
 		EXT_KEY(ZBC);
+
+		EXT_KEY(ZBKB);
+		EXT_KEY(ZBKC);
+		EXT_KEY(ZBKX);
+		EXT_KEY(ZKND);
+		EXT_KEY(ZKNE);
+		EXT_KEY(ZKNH);
+		EXT_KEY(ZKSED);
+		EXT_KEY(ZKSH);
+		EXT_KEY(ZKT);
 #undef EXT_KEY
 	}
 
-- 
2.42.0