xref: /openbmc/linux/tools/perf/util/perf_regs.c (revision a2cce7a9)
1 #include <errno.h>
2 #include "perf_regs.h"
3 #include "event.h"
4 
5 const struct sample_reg __weak sample_reg_masks[] = {
6 	SMPL_REG_END
7 };
8 
9 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
10 {
11 	int i, idx = 0;
12 	u64 mask = regs->mask;
13 
14 	if (regs->cache_mask & (1 << id))
15 		goto out;
16 
17 	if (!(mask & (1 << id)))
18 		return -EINVAL;
19 
20 	for (i = 0; i < id; i++) {
21 		if (mask & (1 << i))
22 			idx++;
23 	}
24 
25 	regs->cache_mask |= (1 << id);
26 	regs->cache_regs[id] = regs->regs[idx];
27 
28 out:
29 	*valp = regs->cache_regs[id];
30 	return 0;
31 }
32