| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. */ |
| 3 | |
| 4 | #include <linux/errno.h> |
| 5 | #include <linux/kernel.h> |
| 6 | #include <linux/perf_event.h> |
| 7 | #include <linux/bug.h> |
| 8 | #include <asm/perf_regs.h> |
| 9 | #include <asm/ptrace.h> |
| 10 | |
| 11 | u64 perf_reg_value(struct pt_regs *regs, int idx) |
| 12 | { |
| 13 | if (WARN_ON_ONCE((u32)idx >= PERF_REG_RISCV_MAX)) |
| 14 | return 0; |
| 15 | |
| 16 | return ((unsigned long *)regs)[idx]; |
| 17 | } |
| 18 | |
| 19 | #define REG_RESERVED (~((1ULL << PERF_REG_RISCV_MAX) - 1)) |
| 20 | |
| 21 | int perf_reg_validate(u64 mask) |
| 22 | { |
| 23 | if (!mask || mask & REG_RESERVED) |
| 24 | return -EINVAL; |
| 25 | |
| 26 | return 0; |
| 27 | } |
| 28 | |
| 29 | u64 perf_reg_abi(struct task_struct *task) |
| 30 | { |
| 31 | #if __riscv_xlen == 64 |
| 32 | return PERF_SAMPLE_REGS_ABI_64; |
| 33 | #else |
| 34 | return PERF_SAMPLE_REGS_ABI_32; |
| 35 | #endif |
| 36 | } |
| 37 | |
| 38 | void perf_get_regs_user(struct perf_regs *regs_user, |
| 39 | struct pt_regs *regs) |
| 40 | { |
| 41 | regs_user->regs = task_pt_regs(current); |
| 42 | regs_user->abi = perf_reg_abi(current); |
| 43 | } |
| 44 |