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riscv: hwprobe: export bfloat16 ISA extension

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Export Zfbmin, Zvfbfmin, Zvfbfwma ISA extension through hwprobe.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Reviewed-by: Clément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20250213003849.147358-4-inochiama@gmail.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
This commit is contained in:
Inochi Amaoto
2025-02-13 08:38:47 +08:00
committed by Alexandre Ghiti
parent e186c28dda
commit a4863e002c
3 changed files with 18 additions and 0 deletions
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12
Documentation/arch/riscv/hwprobe.rst
View File

@@ -242,6 +242,18 @@ The following keys are defined:
* :c:macro:`RISCV_HWPROBE_EXT_SUPM`: The Supm extension is supported as
defined in version 1.0 of the RISC-V Pointer Masking extensions.
* :c:macro:`RISCV_HWPROBE_EXT_ZFBFMIN`: The Zfbfmin extension is supported as
defined in the RISC-V ISA manual starting from commit 4dc23d6229de
("Added Chapter title to BF16").
* :c:macro:`RISCV_HWPROBE_EXT_ZVFBFMIN`: The Zvfbfmin extension is supported as
defined in the RISC-V ISA manual starting from commit 4dc23d6229de
("Added Chapter title to BF16").
* :c:macro:`RISCV_HWPROBE_EXT_ZVFBFWMA`: The Zvfbfwma extension is supported as
defined in the RISC-V ISA manual starting from commit 4dc23d6229de
("Added Chapter title to BF16").
* :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.

3
arch/riscv/include/uapi/asm/hwprobe.h
View File

@@ -73,6 +73,9 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_EXT_ZCMOP (1ULL << 47)
#define RISCV_HWPROBE_EXT_ZAWRS (1ULL << 48)
#define RISCV_HWPROBE_EXT_SUPM (1ULL << 49)
#define RISCV_HWPROBE_EXT_ZFBFMIN (1ULL << 50)
#define RISCV_HWPROBE_EXT_ZVFBFMIN (1ULL << 51)
#define RISCV_HWPROBE_EXT_ZVFBFWMA (1ULL << 52)
#define RISCV_HWPROBE_KEY_CPUPERF_0 5
#define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
#define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0)

3
arch/riscv/kernel/sys_hwprobe.c
View File

@@ -131,6 +131,8 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(ZVE64D);
EXT_KEY(ZVE64F);
EXT_KEY(ZVE64X);
EXT_KEY(ZVFBFMIN);
EXT_KEY(ZVFBFWMA);
EXT_KEY(ZVFH);
EXT_KEY(ZVFHMIN);
EXT_KEY(ZVKB);
@@ -147,6 +149,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(ZCD);
EXT_KEY(ZCF);
EXT_KEY(ZFA);
EXT_KEY(ZFBFMIN);
EXT_KEY(ZFH);
EXT_KEY(ZFHMIN);
}