1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h>
3 #include "perf_regs.h"
4 #include "event.h"
5 
arch_sdt_arg_parse_op(char * old_op __maybe_unused,char ** new_op __maybe_unused)6 int __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 
arch__intr_reg_mask(void)12 uint64_t __weak arch__intr_reg_mask(void)
13 {
14 	return PERF_REGS_MASK;
15 }
16 
arch__user_reg_mask(void)17 uint64_t __weak arch__user_reg_mask(void)
18 {
19 	return PERF_REGS_MASK;
20 }
21 
22 #ifdef HAVE_PERF_REGS_SUPPORT
perf_reg_value(u64 * valp,struct regs_dump * regs,int id)23 int 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 ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
29 		return -EINVAL;
30 
31 	if (regs->cache_mask & (1ULL << id))
32 		goto out;
33 
34 	if (!(mask & (1ULL << id)))
35 		return -EINVAL;
36 
37 	for (i = 0; i < id; i++) {
38 		if (mask & (1ULL << i))
39 			idx++;
40 	}
41 
42 	regs->cache_mask |= (1ULL << id);
43 	regs->cache_regs[id] = regs->regs[idx];
44 
45 out:
46 	*valp = regs->cache_regs[id];
47 	return 0;
48 }
49 #endif
50