diff options
| author | Evan Green <evan@rivosinc.com> | 2023-04-07 16:10:59 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-18 15:48:14 -0700 |
| commit | ea3de9ce8aa280c5175c835bd3e94a3a9b814b74 (patch) | |
| tree | 835575d48af67ab432d8e3497d9156538f8e6668 /arch/riscv/include/asm/hwprobe.h | |
| parent | ff77cf5b2e033d0bb5e3b7f83ebf65c5adc20d12 (diff) | |
RISC-V: Add a syscall for HW probing
We don't have enough space for these all in ELF_HWCAP{,2} and there's no
system call that quite does this, so let's just provide an arch-specific
one to probe for hardware capabilities. This currently just provides
m{arch,imp,vendor}id, but with the key-value pairs we can pass more in
the future.
Co-developed-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Evan Green <evan@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com>
Link: https://lore.kernel.org/r/20230407231103.2622178-3-evan@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/hwprobe.h')
| -rw-r--r-- | arch/riscv/include/asm/hwprobe.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/hwprobe.h b/arch/riscv/include/asm/hwprobe.h new file mode 100644 index 000000000000..6184bbc77256 --- /dev/null +++ b/arch/riscv/include/asm/hwprobe.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Copyright 2023 Rivos, Inc + */ + +#ifndef _ASM_HWPROBE_H +#define _ASM_HWPROBE_H + +#include <uapi/asm/hwprobe.h> + +#define RISCV_HWPROBE_MAX_KEY 2 + +#endif |