1// SPDX-License-Identifier: GPL-2.0
 2#include <errno.h>
 3#include "perf_regs.h"
 4#include "event.h"
 5
 6int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused,
 7				 char **new_op __maybe_unused)
 8{
 9	return SDT_ARG_SKIP;
10}
11
12uint64_t __weak arch__intr_reg_mask(void)
13{
14	return PERF_REGS_MASK;
15}
16
17uint64_t __weak arch__user_reg_mask(void)
18{
19	return PERF_REGS_MASK;
20}
21
22#ifdef HAVE_PERF_REGS_SUPPORT
23int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
24{
25	int i, idx = 0;
26	u64 mask = regs->mask;
27
28	if (regs->cache_mask & (1ULL << id))
29		goto out;
30
31	if (!(mask & (1ULL << id)))
32		return -EINVAL;
33
34	for (i = 0; i < id; i++) {
35		if (mask & (1ULL << i))
36			idx++;
37	}
38
39	regs->cache_mask |= (1ULL << id);
40	regs->cache_regs[id] = regs->regs[idx];
41
42out:
43	*valp = regs->cache_regs[id];
44	return 0;
45}
46#endif