riscv: hwprobe: export Zilsd and Zclsd ISA extensions

Export Zilsd and Zclsd ISA extensions through hwprobe.

Signed-off-by: Pincheng Wang <pincheng.plct@isrc.iscas.ac.cn>
Reviewed-by: Nutty Liu <nutty.liu@hotmail.com>
Link: https://patch.msgid.link/20250826162939.1494021-4-pincheng.plct@isrc.iscas.ac.cn
[pjw@kernel.org: fixed whitespace; updated to apply]
Signed-off-by: Paul Walmsley <pjw@kernel.org>

Author: wpcwzy

Documentation/arch/riscv/hwprobe.rst

@@ -281,6 +281,14 @@ The following keys are defined:
   * :c:macro:`RISCV_HWPROBE_EXT_ZICBOP`: The Zicbop extension is supported, as
        ratified in commit 3dd606f ("Create cmobase-v1.0.pdf") of riscv-CMOs.
 
+  * :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.

arch/riscv/include/uapi/asm/hwprobe.h

@@ -84,6 +84,9 @@ struct riscv_hwprobe {
 #define		RISCV_HWPROBE_EXT_ZABHA		(1ULL << 58)
 #define		RISCV_HWPROBE_EXT_ZALASR	(1ULL << 59)
 #define		RISCV_HWPROBE_EXT_ZICBOP	(1ULL << 60)
+#define		RISCV_HWPROBE_EXT_ZILSD		(1ULL << 61)
+#define		RISCV_HWPROBE_EXT_ZCLSD		(1ULL << 62)
+
 #define RISCV_HWPROBE_KEY_CPUPERF_0	5
 #define		RISCV_HWPROBE_MISALIGNED_UNKNOWN	(0 << 0)
 #define		RISCV_HWPROBE_MISALIGNED_EMULATED	(1 << 0)

arch/riscv/kernel/sys_hwprobe.c

@@ -121,6 +121,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 		EXT_KEY(ZBS);
 		EXT_KEY(ZCA);
 		EXT_KEY(ZCB);
+		EXT_KEY(ZCLSD);
 		EXT_KEY(ZCMOP);
 		EXT_KEY(ZICBOM);
 		EXT_KEY(ZICBOP);
@@ -130,6 +131,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 		EXT_KEY(ZIHINTNTL);
 		EXT_KEY(ZIHINTPAUSE);
 		EXT_KEY(ZIHPM);
+		EXT_KEY(ZILSD);
 		EXT_KEY(ZIMOP);
 		EXT_KEY(ZKND);
 		EXT_KEY(ZKNE);