1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /*
3 * arm64 callchain support
4 *
5 * Copyright (C) 2015 ARM Limited
6 */
7 #include <linux/perf_event.h>
8 #include <linux/stacktrace.h>
9 #include <linux/uaccess.h>
10
11 #include <asm/pointer_auth.h>
12
13 static bool callchain_trace(void *data, unsign
14 {
15 struct perf_callchain_entry_ctx *entry
16
17 return perf_callchain_store(entry, pc)
18 }
19
20 void perf_callchain_user(struct perf_callchain
21 struct pt_regs *regs)
22 {
23 if (perf_guest_state()) {
24 /* We don't support guest os c
25 return;
26 }
27
28 arch_stack_walk_user(callchain_trace,
29 }
30
31 void perf_callchain_kernel(struct perf_callcha
32 struct pt_regs *reg
33 {
34 if (perf_guest_state()) {
35 /* We don't support guest os c
36 return;
37 }
38
39 arch_stack_walk(callchain_trace, entry
40 }
41
42 unsigned long perf_instruction_pointer(struct
43 {
44 if (perf_guest_state())
45 return perf_guest_get_ip();
46
47 return instruction_pointer(regs);
48 }
49
50 unsigned long perf_misc_flags(struct pt_regs *
51 {
52 unsigned int guest_state = perf_guest_
53 int misc = 0;
54
55 if (guest_state) {
56 if (guest_state & PERF_GUEST_U
57 misc |= PERF_RECORD_MI
58 else
59 misc |= PERF_RECORD_MI
60 } else {
61 if (user_mode(regs))
62 misc |= PERF_RECORD_MI
63 else
64 misc |= PERF_RECORD_MI
65 }
66
67 return misc;
68 }
69
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