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