On Mon, Oct 20, 2025 at 12:21 PM Xu Lu luxu.kernel@bytedance.com wrote:
Export the Zalasr extension to userspace using hwprobe.
Signed-off-by: Xu Lu luxu.kernel@bytedance.com
Documentation/arch/riscv/hwprobe.rst | 5 ++++- arch/riscv/include/uapi/asm/hwprobe.h | 1 + arch/riscv/kernel/sys_hwprobe.c | 1 + 3 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst index 2aa9be272d5de..067a3595fb9d5 100644 --- a/Documentation/arch/riscv/hwprobe.rst +++ b/Documentation/arch/riscv/hwprobe.rst @@ -249,6 +249,9 @@ The following keys are defined: defined in the in the RISC-V ISA manual starting from commit e87412e621f1 ("integrate Zaamo and Zalrsc text (#1304)").
- :c:macro:`RISCV_HWPROBE_EXT_ZALASR`: The Zalasr extension is supported as
frozen at commit 194f0094 ("Version 0.9 for freeze") of riscv-zalasr.
"Frozen Version 0.9" might not be proper; it denotes the current temporary state, not the goal of the patch.
- :c:macro:`RISCV_HWPROBE_EXT_ZALRSC`: The Zalrsc extension is supported as defined in the in the RISC-V ISA manual starting from commit e87412e621f1 ("integrate Zaamo and Zalrsc text (#1304)").
@@ -360,4 +363,4 @@ The following keys are defined:
* :c:macro:`RISCV_HWPROBE_VENDOR_EXT_XSFVFWMACCQQQ`: The Xsfvfwmaccqqq vendor extension is supported in version 1.0 of Matrix Multiply Accumulate
Instruction Extensions Specification.\ No newline at end of file
Instruction Extensions Specification.diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h index aaf6ad9704993..d3a65f8ff7da4 100644 --- a/arch/riscv/include/uapi/asm/hwprobe.h +++ b/arch/riscv/include/uapi/asm/hwprobe.h @@ -82,6 +82,7 @@ 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_ZALASR (1ULL << 59) #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 0b170e18a2beb..0529e692b1173 100644 --- a/arch/riscv/kernel/sys_hwprobe.c +++ b/arch/riscv/kernel/sys_hwprobe.c @@ -99,6 +99,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair, EXT_KEY(ZAAMO); EXT_KEY(ZABHA); EXT_KEY(ZACAS);
EXT_KEY(ZALASR); EXT_KEY(ZALRSC); EXT_KEY(ZAWRS); EXT_KEY(ZBA);-- 2.20.1