On Wed, Jun 19, 2024 at 05:39:10PM +0200, Clément Léger wrote:
Export the Zaamo and Zalrsc extensions to userspace using hwprobe.
Signed-off-by: Clément Léger cleger@rivosinc.com
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 25d783be2878..6836a789a9b1 100644 --- a/Documentation/arch/riscv/hwprobe.rst +++ b/Documentation/arch/riscv/hwprobe.rst @@ -235,6 +235,14 @@ The following keys are defined: supported as defined in the RISC-V ISA manual starting from commit c732a4f39a4 ("Zcmop is ratified/1.0").
- :c:macro:`RISCV_HWPROBE_EXT_ZAAMO`: The Zaamo extension is supported as
defined in the in the RISC-V ISA manual starting from commit e87412e621f1("integrate Zaamo and Zalrsc text (#1304)").
- :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)").
- :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 920fc6a586c9..52cd161e9a94 100644 --- a/arch/riscv/include/uapi/asm/hwprobe.h +++ b/arch/riscv/include/uapi/asm/hwprobe.h @@ -71,6 +71,8 @@ struct riscv_hwprobe { #define RISCV_HWPROBE_EXT_ZCD (1ULL << 45) #define RISCV_HWPROBE_EXT_ZCF (1ULL << 46) #define RISCV_HWPROBE_EXT_ZCMOP (1ULL << 47) +#define RISCV_HWPROBE_EXT_ZAAMO (1ULL << 48) +#define RISCV_HWPROBE_EXT_ZALRSC (1ULL << 49) #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 3d1aa13a0bb2..e09f1bc3af17 100644 --- a/arch/riscv/kernel/sys_hwprobe.c +++ b/arch/riscv/kernel/sys_hwprobe.c @@ -116,6 +116,8 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair, EXT_KEY(ZCA); EXT_KEY(ZCB); EXT_KEY(ZCMOP);
EXT_KEY(ZAAMO);EXT_KEY(ZALRSC);/* * All the following extensions must depend on the kernel -- 2.45.2
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Reviewed-by: Charlie Jenkins charlie@rivosinc.com