Merge tag 'hyperv-fixes-signed-20211007' of git://git.kernel.org/pub/scm/linux/kernel...
[platform/kernel/linux-starfive.git] / tools / perf / util / perf_regs.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h>
3 #include "perf_regs.h"
4 #include "event.h"
5
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
12 uint64_t __weak arch__intr_reg_mask(void)
13 {
14         return PERF_REGS_MASK;
15 }
16
17 uint64_t __weak arch__user_reg_mask(void)
18 {
19         return PERF_REGS_MASK;
20 }
21
22 #ifdef HAVE_PERF_REGS_SUPPORT
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 (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
42 out:
43         *valp = regs->cache_regs[id];
44         return 0;
45 }
46 #endif