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| author | Evan Green <evan@rivosinc.com> | 2023-04-08 01:10:59 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-19 00:48:14 +0200 |
| commit | ea3de9ce8aa280c5175c835bd3e94a3a9b814b74 (patch) | |
| tree | 835575d48af67ab432d8e3497d9156538f8e6668 /arch/riscv/include/asm/syscall.h | |
| parent | RISC-V: Move struct riscv_cpuinfo to new header (diff) | |
| download | linux-ea3de9ce8aa280c5175c835bd3e94a3a9b814b74.tar.xz linux-ea3de9ce8aa280c5175c835bd3e94a3a9b814b74.zip | |
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/syscall.h')
| -rw-r--r-- | arch/riscv/include/asm/syscall.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h index 384a63b86420..3b5a667928bf 100644 --- a/arch/riscv/include/asm/syscall.h +++ b/arch/riscv/include/asm/syscall.h @@ -10,6 +10,7 @@ #ifndef _ASM_RISCV_SYSCALL_H #define _ASM_RISCV_SYSCALL_H +#include <asm/hwprobe.h> #include <uapi/linux/audit.h> #include <linux/sched.h> #include <linux/err.h> @@ -75,4 +76,7 @@ static inline int syscall_get_arch(struct task_struct *task) } asmlinkage long sys_riscv_flush_icache(uintptr_t, uintptr_t, uintptr_t); + +asmlinkage long sys_riscv_hwprobe(struct riscv_hwprobe *, size_t, size_t, + unsigned long *, unsigned int); #endif /* _ASM_RISCV_SYSCALL_H */ |