1// SPDX-License-Identifier: GPL-2.0
 2#include <errno.h>
 3#include <memory.h>
 4#include "../../../util/evsel.h"
 5#include "../../../util/kvm-stat.h"
 6#include "arm64_exception_types.h"
 7#include "debug.h"
 8
 9define_exit_reasons_table(arm64_exit_reasons, kvm_arm_exception_type);
10define_exit_reasons_table(arm64_trap_exit_reasons, kvm_arm_exception_class);
11
12const char *kvm_trap_exit_reason = "esr_ec";
13const char *vcpu_id_str = "id";
14const char *kvm_exit_reason = "ret";
15const char *kvm_entry_trace = "kvm:kvm_entry";
16const char *kvm_exit_trace = "kvm:kvm_exit";
17
18const char *kvm_events_tp[] = {
19	"kvm:kvm_entry",
20	"kvm:kvm_exit",
21	NULL,
22};
23
24static void event_get_key(struct evsel *evsel,
25			  struct perf_sample *sample,
26			  struct event_key *key)
27{
28	key->info = 0;
29	key->key = evsel__intval(evsel, sample, kvm_exit_reason);
30	key->exit_reasons = arm64_exit_reasons;
31
32	/*
33	 * TRAP exceptions carry exception class info in esr_ec field
34	 * and, hence, we need to use a different exit_reasons table to
35	 * properly decode event's est_ec.
36	 */
37	if (key->key == ARM_EXCEPTION_TRAP) {
38		key->key = evsel__intval(evsel, sample, kvm_trap_exit_reason);
39		key->exit_reasons = arm64_trap_exit_reasons;
40	}
41}
42
43static bool event_begin(struct evsel *evsel,
44			struct perf_sample *sample __maybe_unused,
45			struct event_key *key __maybe_unused)
46{
47	return evsel__name_is(evsel, kvm_entry_trace);
48}
49
50static bool event_end(struct evsel *evsel,
51		      struct perf_sample *sample,
52		      struct event_key *key)
53{
54	if (evsel__name_is(evsel, kvm_exit_trace)) {
55		event_get_key(evsel, sample, key);
56		return true;
57	}
58	return false;
59}
60
61static struct kvm_events_ops exit_events = {
62	.is_begin_event = event_begin,
63	.is_end_event	= event_end,
64	.decode_key	= exit_event_decode_key,
65	.name		= "VM-EXIT"
66};
67
68struct kvm_reg_events_ops kvm_reg_events_ops[] = {
69	{
70		.name	= "vmexit",
71		.ops	= &exit_events,
72	},
73	{ NULL, NULL },
74};
75
76const char * const kvm_skip_events[] = {
77	NULL,
78};
79
80int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)
81{
82	kvm->exit_reasons_isa = "arm64";
83	return 0;
84}