[PATCH v4 13/20] riscv: hwprobe: export Zhintntl ISA extension

[Clément Léger]

Export Zihintntl extension[1] through hwprobe.

Link: https://drive.google.com/file/d/13_wsN8YmRfH8YWysFyTX-DjTkCnBd9hj/view [1]
Signed-off-by: Clément Léger <cleger at rivosinc.com>
Reviewed-by: Evan Green <evan at rivosinc.com>
---
 Documentation/arch/riscv/hwprobe.rst  | 3 +++
 arch/riscv/include/uapi/asm/hwprobe.h | 1 +
 arch/riscv/kernel/sys_riscv.c         | 1 +
 3 files changed, 5 insertions(+)

diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
index 397d53195f49..aa8ebeeddfe6 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -146,6 +146,9 @@ The following keys are defined:
   * :c:macro:`RISCV_HWPROBE_EXT_ZFHMIN`: The Zfhmin extension version 1.0 is
        supported as defined in the RISC-V ISA manual.
 
+  * :c:macro:`RISCV_HWPROBE_EXT_ZIHINTNTL`: The Zihintntl extension version 1.0
+       is supported as defined in the RISC-V ISA manual.
+
 * :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 2d960777ea43..d72c69ea0740 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -52,6 +52,7 @@ struct riscv_hwprobe {
 #define		RISCV_HWPROBE_EXT_ZVKT		(1 << 26)
 #define		RISCV_HWPROBE_EXT_ZFH		(1 << 27)
 #define		RISCV_HWPROBE_EXT_ZFHMIN	(1 << 28)
+#define		RISCV_HWPROBE_EXT_ZIHINTNTL	(1 << 29)
 #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 d776c6c39fcd..a46e4f6821dd 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -173,6 +173,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 		EXT_KEY(ZKSED);
 		EXT_KEY(ZKSH);
 		EXT_KEY(ZKT);
+		EXT_KEY(ZIHINTNTL);
 
 		if (has_vector()) {
 			EXT_KEY(ZVBB);
-- 
2.42.0