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
11u64 perf_reg_value(struct pt_regs *regs, int idx)
12{
13	if (WARN_ON_ONCE((u32)idx >= PERF_REG_CSKY_MAX))
14		return 0;
15
16	return (u64)*((u32 *)regs + idx);
17}
18
19#define REG_RESERVED (~((1ULL << PERF_REG_CSKY_MAX) - 1))
20
21int perf_reg_validate(u64 mask)
22{
23	if (!mask || mask & REG_RESERVED)
24		return -EINVAL;
25
26	return 0;
27}
28
29u64 perf_reg_abi(struct task_struct *task)
30{
31	return PERF_SAMPLE_REGS_ABI_32;
32}
33
34void perf_get_regs_user(struct perf_regs *regs_user,
35			struct pt_regs *regs)
36{
37	regs_user->regs = task_pt_regs(current);
38	regs_user->abi = perf_reg_abi(current);
39}
40