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