linux-kernel - [PATCH 3/5] riscv: hwprobe: export Zilsd and Zclsd ISA extensions

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Message-Id: <20250821135527.224044-4-pincheng.plct@isrc.iscas.ac.cn>
Date: Thu, 21 Aug 2025 21:55:25 +0800
From: Pincheng Wang <pincheng.plct@...c.iscas.ac.cn>
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Subject: [PATCH 3/5] riscv: hwprobe: export Zilsd and Zclsd ISA extensions

Export Zilsd and Zclsd ISA extensions through hwprobe.

Signed-off-by: Pincheng Wang <pincheng.plct@...c.iscas.ac.cn>
---
 Documentation/arch/riscv/hwprobe.rst  | 8 ++++++++
 arch/riscv/include/uapi/asm/hwprobe.h | 2 ++
 arch/riscv/kernel/sys_hwprobe.c       | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
index 2aa9be272d5d..538ab6c08f7b 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -275,6 +275,14 @@ The following keys are defined:
        ratified in commit 49f49c842ff9 ("Update to Rafified state") of
        riscv-zabha.
 
+  * :c:macro:`RISCV_HWPROBE_EXT_ZILSD`: The Zilsd extension is supported as
+       defined in the RISC-V ISA manual starting from commit f88abf1("Integrating
+       load/store pair for RV32 with the main manual") of the riscv-isa-manual.
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZCLSD`: The Zclsd extension is supported as
+       defined in the RISC-V ISA manual starting from commit f88abf1("Integrating
+       load/store pair for RV32 with the main manual") of the riscv-isa-manual.
+
 * :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: Deprecated.  Returns similar values to
      :c:macro:`RISCV_HWPROBE_KEY_MISALIGNED_SCALAR_PERF`, but the key was
      mistakenly classified as a bitmask rather than a value.
diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h
index aaf6ad970499..e086179bb4fa 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -82,6 +82,8 @@ struct riscv_hwprobe {
 #define		RISCV_HWPROBE_EXT_ZAAMO		(1ULL << 56)
 #define		RISCV_HWPROBE_EXT_ZALRSC	(1ULL << 57)
 #define		RISCV_HWPROBE_EXT_ZABHA		(1ULL << 58)
+#define 	RISCV_HWPROBE_EXT_ZILSD 	(1ULL << 59)
+#define 	RISCV_HWPROBE_EXT_ZCLSD 	(1ULL << 60)
 #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_hwprobe.c b/arch/riscv/kernel/sys_hwprobe.c
index 0b170e18a2be..12f4b68ad2ac 100644
--- a/arch/riscv/kernel/sys_hwprobe.c
+++ b/arch/riscv/kernel/sys_hwprobe.c
@@ -111,6 +111,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 		EXT_KEY(ZCA);
 		EXT_KEY(ZCB);
 		EXT_KEY(ZCMOP);
+		EXT_KEY(ZCLSD);
 		EXT_KEY(ZICBOM);
 		EXT_KEY(ZICBOZ);
 		EXT_KEY(ZICNTR);
@@ -119,6 +120,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 		EXT_KEY(ZIHINTPAUSE);
 		EXT_KEY(ZIHPM);
 		EXT_KEY(ZIMOP);
+		EXT_KEY(ZILSD);
 		EXT_KEY(ZKND);
 		EXT_KEY(ZKNE);
 		EXT_KEY(ZKNH);
-- 
2.39.5