kernel/tools/perf/arch/s390/util/kvm-stat.c

   1 /*
   2  * Arch specific functions for perf kvm stat.
   3  *
   4  * Copyright 2014 IBM Corp.
   5  * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License (version 2 only)
   9  * as published by the Free Software Foundation.
  10  */
  11
  12 #include "../../util/kvm-stat.h"
  13 #include <asm/kvm_perf.h>
  14
  15 define_exit_reasons_table(sie_exit_reasons, sie_intercept_code);
  16 define_exit_reasons_table(sie_icpt_insn_codes, icpt_insn_codes);
  17 define_exit_reasons_table(sie_sigp_order_codes, sigp_order_codes);
  18 define_exit_reasons_table(sie_diagnose_codes, diagnose_codes);
  19 define_exit_reasons_table(sie_icpt_prog_codes, icpt_prog_codes);
  20
  21 static void event_icpt_insn_get_key(struct perf_evsel *evsel,
  22                                     struct perf_sample *sample,
  23                                     struct event_key *key)
  24 {
  25         unsigned long insn;
  26
  27         insn = perf_evsel__intval(evsel, sample, "instruction");
  28         key->key = icpt_insn_decoder(insn);
  29         key->exit_reasons = sie_icpt_insn_codes;
  30 }
  31
  32 static void event_sigp_get_key(struct perf_evsel *evsel,
  33                                struct perf_sample *sample,
  34                                struct event_key *key)
  35 {
  36         key->key = perf_evsel__intval(evsel, sample, "order_code");
  37         key->exit_reasons = sie_sigp_order_codes;
  38 }
  39
  40 static void event_diag_get_key(struct perf_evsel *evsel,
  41                                struct perf_sample *sample,
  42                                struct event_key *key)
  43 {
  44         key->key = perf_evsel__intval(evsel, sample, "code");
  45         key->exit_reasons = sie_diagnose_codes;
  46 }
  47
  48 static void event_icpt_prog_get_key(struct perf_evsel *evsel,
  49                                     struct perf_sample *sample,
  50                                     struct event_key *key)
  51 {
  52         key->key = perf_evsel__intval(evsel, sample, "code");
  53         key->exit_reasons = sie_icpt_prog_codes;
  54 }
  55
  56 static struct child_event_ops child_events[] = {
  57         { .name = "kvm:kvm_s390_intercept_instruction",
  58           .get_key = event_icpt_insn_get_key },
  59         { .name = "kvm:kvm_s390_handle_sigp",
  60           .get_key = event_sigp_get_key },
  61         { .name = "kvm:kvm_s390_handle_diag",
  62           .get_key = event_diag_get_key },
  63         { .name = "kvm:kvm_s390_intercept_prog",
  64           .get_key = event_icpt_prog_get_key },
  65         { NULL, NULL },
  66 };
  67
  68 static struct kvm_events_ops exit_events = {
  69         .is_begin_event = exit_event_begin,
  70         .is_end_event = exit_event_end,
  71         .child_ops = child_events,
  72         .decode_key = exit_event_decode_key,
  73         .name = "VM-EXIT"
  74 };
  75
  76 const char * const kvm_events_tp[] = {
  77         "kvm:kvm_s390_sie_enter",
  78         "kvm:kvm_s390_sie_exit",
  79         "kvm:kvm_s390_intercept_instruction",
  80         "kvm:kvm_s390_handle_sigp",
  81         "kvm:kvm_s390_handle_diag",
  82         "kvm:kvm_s390_intercept_prog",
  83         NULL,
  84 };
  85
  86 struct kvm_reg_events_ops kvm_reg_events_ops[] = {
  87         { .name = "vmexit", .ops = &exit_events },
  88         { NULL, NULL },
  89 };
  90
  91 const char * const kvm_skip_events[] = {
  92         "Wait state",
  93         NULL,
  94 };
  95
  96 int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
  97 {
  98         if (strstr(cpuid, "IBM/S390")) {
  99                 kvm->exit_reasons = sie_exit_reasons;
 100                 kvm->exit_reasons_isa = "SIE";
 101         } else
 102                 return -ENOTSUP;
 103
 104         return 0;
 105 }