kvm-stat.c

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/*
 * Arch specific functions for perf kvm stat.
 *
 * Copyright 2014 IBM Corp.
 * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2 only)
 * as published by the Free Software Foundation.
 */

#include <errno.h>
#include "../../util/kvm-stat.h"
#include <asm/sie.h>

define_exit_reasons_table(sie_exit_reasons, sie_intercept_code);
define_exit_reasons_table(sie_icpt_insn_codes, icpt_insn_codes);
define_exit_reasons_table(sie_sigp_order_codes, sigp_order_codes);
define_exit_reasons_table(sie_diagnose_codes, diagnose_codes);
define_exit_reasons_table(sie_icpt_prog_codes, icpt_prog_codes);

const char *vcpu_id_str = "id";
const int decode_str_len = 40;
const char *kvm_exit_reason = "icptcode";
const char *kvm_entry_trace = "kvm:kvm_s390_sie_enter";
const char *kvm_exit_trace = "kvm:kvm_s390_sie_exit";

static void event_icpt_insn_get_key(struct perf_evsel *evsel,
                    struct perf_sample *sample,
                    struct event_key *key)
{
    unsigned long insn;

    insn = perf_evsel__intval(evsel, sample, "instruction");
    key->key = icpt_insn_decoder(insn);
    key->exit_reasons = sie_icpt_insn_codes;
}

static void event_sigp_get_key(struct perf_evsel *evsel,
                   struct perf_sample *sample,
                   struct event_key *key)
{
    key->key = perf_evsel__intval(evsel, sample, "order_code");
    key->exit_reasons = sie_sigp_order_codes;
}

static void event_diag_get_key(struct perf_evsel *evsel,
                   struct perf_sample *sample,
                   struct event_key *key)
{
    key->key = perf_evsel__intval(evsel, sample, "code");
    key->exit_reasons = sie_diagnose_codes;
}

static void event_icpt_prog_get_key(struct perf_evsel *evsel,
                    struct perf_sample *sample,
                    struct event_key *key)
{
    key->key = perf_evsel__intval(evsel, sample, "code");
    key->exit_reasons = sie_icpt_prog_codes;
}

static struct child_event_ops child_events[] = {
    { .name = "kvm:kvm_s390_intercept_instruction",
      .get_key = event_icpt_insn_get_key },
    { .name = "kvm:kvm_s390_handle_sigp",
      .get_key = event_sigp_get_key },
    { .name = "kvm:kvm_s390_handle_diag",
      .get_key = event_diag_get_key },
    { .name = "kvm:kvm_s390_intercept_prog",
      .get_key = event_icpt_prog_get_key },
    { NULL, NULL },
};

static struct kvm_events_ops exit_events = {
    .is_begin_event = exit_event_begin,
    .is_end_event = exit_event_end,
    .child_ops = child_events,
    .decode_key = exit_event_decode_key,
    .name = "VM-EXIT"
};

const char *kvm_events_tp[] = {
    "kvm:kvm_s390_sie_enter",
    "kvm:kvm_s390_sie_exit",
    "kvm:kvm_s390_intercept_instruction",
    "kvm:kvm_s390_handle_sigp",
    "kvm:kvm_s390_handle_diag",
    "kvm:kvm_s390_intercept_prog",
    NULL,
};

struct kvm_reg_events_ops kvm_reg_events_ops[] = {
    { .name = "vmexit", .ops = &exit_events },
    { NULL, NULL },
};

const char * const kvm_skip_events[] = {
    "Wait state",
    NULL,
};

int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
{
    if (strstr(cpuid, "IBM/S390")) {
        kvm->exit_reasons = sie_exit_reasons;
        kvm->exit_reasons_isa = "SIE";
    } else
        return -ENOTSUP;

    return 0;
}