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Subject[PATCH v3 13/20] riscv: hwprobe: export Zhintntl ISA extension
Date
Export Zihintntl extension[1] through hwprobe.

Link: https://drive.google.com/file/d/13_wsN8YmRfH8YWysFyTX-DjTkCnBd9hj/view [1]
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Evan Green <evan@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 ce0490e3130c..2f37b26d27da 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -143,6 +143,9 @@ 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 12680081c602..36c8d073c987 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -51,6 +51,7 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_EXT_ZVKT (1 << 25)
#define RISCV_HWPROBE_EXT_ZFH (1 << 26)
#define RISCV_HWPROBE_EXT_ZFHMIN (1 << 27)
+#define RISCV_HWPROBE_EXT_ZIHINTNTL (1 << 28)
#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 486e053a0797..af2b01b0a5b6 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -172,6 +172,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
CHECK_ISA_EXT(ZKSED);
CHECK_ISA_EXT(ZKSH);
CHECK_ISA_EXT(ZKT);
+ CHECK_ISA_EXT(ZIHINTNTL);

if (has_vector()) {
CHECK_ISA_EXT(ZVBB);
--
2.42.0
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