kvm-stat.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Arch specific functions for perf kvm stat.
 4 *
 5 * Copyright 2024 Beijing ESWIN Computing Technology Co., Ltd.
 6 *
 7 */
 8#include <errno.h>
 9#include <memory.h>
10#include "../../../util/evsel.h"
11#include "../../../util/kvm-stat.h"
12#include "riscv_trap_types.h"
13#include "debug.h"
14
15define_exit_reasons_table(riscv_exit_reasons, kvm_riscv_trap_class);
16
17const char *vcpu_id_str = "id";
18const char *kvm_exit_reason = "scause";
19const char *kvm_entry_trace = "kvm:kvm_entry";
20const char *kvm_exit_trace = "kvm:kvm_exit";
21
22const char *kvm_events_tp[] = {
23	"kvm:kvm_entry",
24	"kvm:kvm_exit",
25	NULL,
26};
27
28static void event_get_key(struct evsel *evsel,
29			  struct perf_sample *sample,
30			  struct event_key *key)
31{
32	key->info = 0;
33	key->key = evsel__intval(evsel, sample, kvm_exit_reason) & ~CAUSE_IRQ_FLAG;
34	key->exit_reasons = riscv_exit_reasons;
35}
36
37static bool event_begin(struct evsel *evsel,
38			struct perf_sample *sample __maybe_unused,
39			struct event_key *key __maybe_unused)
40{
41	return evsel__name_is(evsel, kvm_entry_trace);
42}
43
44static bool event_end(struct evsel *evsel,
45		      struct perf_sample *sample,
46		      struct event_key *key)
47{
48	if (evsel__name_is(evsel, kvm_exit_trace)) {
49		event_get_key(evsel, sample, key);
50		return true;
51	}
52	return false;
53}
54
55static struct kvm_events_ops exit_events = {
56	.is_begin_event = event_begin,
57	.is_end_event	= event_end,
58	.decode_key	= exit_event_decode_key,
59	.name		= "VM-EXIT"
60};
61
62struct kvm_reg_events_ops kvm_reg_events_ops[] = {
63	{
64		.name	= "vmexit",
65		.ops	= &exit_events,
66	},
67	{ NULL, NULL },
68};
69
70const char * const kvm_skip_events[] = {
71	NULL,
72};
73
74int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)
75{
76	kvm->exit_reasons_isa = "riscv64";
77	return 0;
78}