kvm-stat.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Arch specific functions for perf kvm stat.
  4 *
  5 * Copyright 2014 IBM Corp.
  6 * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
  7 */
  8
  9#include <errno.h>
 10#include <string.h>
 11#include "../../util/kvm-stat.h"
 12#include "../../util/evsel.h"
 13#include <asm/sie.h>
 14
 15define_exit_reasons_table(sie_exit_reasons, sie_intercept_code);
 16define_exit_reasons_table(sie_icpt_insn_codes, icpt_insn_codes);
 17define_exit_reasons_table(sie_sigp_order_codes, sigp_order_codes);
 18define_exit_reasons_table(sie_diagnose_codes, diagnose_codes);
 19define_exit_reasons_table(sie_icpt_prog_codes, icpt_prog_codes);
 20
 21const char *vcpu_id_str = "id";
 22const char *kvm_exit_reason = "icptcode";
 23const char *kvm_entry_trace = "kvm:kvm_s390_sie_enter";
 24const char *kvm_exit_trace = "kvm:kvm_s390_sie_exit";
 25
 26static void event_icpt_insn_get_key(struct evsel *evsel,
 27				    struct perf_sample *sample,
 28				    struct event_key *key)
 29{
 30	unsigned long insn;
 31
 32	insn = evsel__intval(evsel, sample, "instruction");
 33	key->key = icpt_insn_decoder(insn);
 34	key->exit_reasons = sie_icpt_insn_codes;
 35}
 36
 37static void event_sigp_get_key(struct evsel *evsel,
 38			       struct perf_sample *sample,
 39			       struct event_key *key)
 40{
 41	key->key = evsel__intval(evsel, sample, "order_code");
 42	key->exit_reasons = sie_sigp_order_codes;
 43}
 44
 45static void event_diag_get_key(struct evsel *evsel,
 46			       struct perf_sample *sample,
 47			       struct event_key *key)
 48{
 49	key->key = evsel__intval(evsel, sample, "code");
 50	key->exit_reasons = sie_diagnose_codes;
 51}
 52
 53static void event_icpt_prog_get_key(struct evsel *evsel,
 54				    struct perf_sample *sample,
 55				    struct event_key *key)
 56{
 57	key->key = evsel__intval(evsel, sample, "code");
 58	key->exit_reasons = sie_icpt_prog_codes;
 59}
 60
 61static struct child_event_ops child_events[] = {
 62	{ .name = "kvm:kvm_s390_intercept_instruction",
 63	  .get_key = event_icpt_insn_get_key },
 64	{ .name = "kvm:kvm_s390_handle_sigp",
 65	  .get_key = event_sigp_get_key },
 66	{ .name = "kvm:kvm_s390_handle_diag",
 67	  .get_key = event_diag_get_key },
 68	{ .name = "kvm:kvm_s390_intercept_prog",
 69	  .get_key = event_icpt_prog_get_key },
 70	{ NULL, NULL },
 71};
 72
 73static struct kvm_events_ops exit_events = {
 74	.is_begin_event = exit_event_begin,
 75	.is_end_event = exit_event_end,
 76	.child_ops = child_events,
 77	.decode_key = exit_event_decode_key,
 78	.name = "VM-EXIT"
 79};
 80
 81const char *kvm_events_tp[] = {
 82	"kvm:kvm_s390_sie_enter",
 83	"kvm:kvm_s390_sie_exit",
 84	"kvm:kvm_s390_intercept_instruction",
 85	"kvm:kvm_s390_handle_sigp",
 86	"kvm:kvm_s390_handle_diag",
 87	"kvm:kvm_s390_intercept_prog",
 88	NULL,
 89};
 90
 91struct kvm_reg_events_ops kvm_reg_events_ops[] = {
 92	{ .name = "vmexit", .ops = &exit_events },
 93	{ NULL, NULL },
 94};
 95
 96const char * const kvm_skip_events[] = {
 97	"Wait state",
 98	NULL,
 99};
100
101int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
102{
103	if (strstr(cpuid, "IBM")) {
104		kvm->exit_reasons = sie_exit_reasons;
105		kvm->exit_reasons_isa = "SIE";
106	} else
107		return -ENOTSUP;
108
109	return 0;
110}