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 <errno.h>
  13 #include "../../util/kvm-stat.h"
  14 #include <asm/sie.h>
  15
  16 define_exit_reasons_table(sie_exit_reasons, sie_intercept_code);
  17 define_exit_reasons_table(sie_icpt_insn_codes, icpt_insn_codes);
  18 define_exit_reasons_table(sie_sigp_order_codes, sigp_order_codes);
  19 define_exit_reasons_table(sie_diagnose_codes, diagnose_codes);
  20 define_exit_reasons_table(sie_icpt_prog_codes, icpt_prog_codes);
  21
  22 const char *vcpu_id_str = "id";
  23 const int decode_str_len = 40;
  24 const char *kvm_exit_reason = "icptcode";
  25 const char *kvm_entry_trace = "kvm:kvm_s390_sie_enter";
  26 const char *kvm_exit_trace = "kvm:kvm_s390_sie_exit";
  27
  28 static void event_icpt_insn_get_key(struct perf_evsel *evsel,
  29                                     struct perf_sample *sample,
  30                                     struct event_key *key)
  31 {
  32         unsigned long insn;
  33
  34         insn = perf_evsel__intval(evsel, sample, "instruction");
  35         key->key = icpt_insn_decoder(insn);
  36         key->exit_reasons = sie_icpt_insn_codes;
  37 }
  38
  39 static void event_sigp_get_key(struct perf_evsel *evsel,
  40                                struct perf_sample *sample,
  41                                struct event_key *key)
  42 {
  43         key->key = perf_evsel__intval(evsel, sample, "order_code");
  44         key->exit_reasons = sie_sigp_order_codes;
  45 }
  46
  47 static void event_diag_get_key(struct perf_evsel *evsel,
  48                                struct perf_sample *sample,
  49                                struct event_key *key)
  50 {
  51         key->key = perf_evsel__intval(evsel, sample, "code");
  52         key->exit_reasons = sie_diagnose_codes;
  53 }
  54
  55 static void event_icpt_prog_get_key(struct perf_evsel *evsel,
  56                                     struct perf_sample *sample,
  57                                     struct event_key *key)
  58 {
  59         key->key = perf_evsel__intval(evsel, sample, "code");
  60         key->exit_reasons = sie_icpt_prog_codes;
  61 }
  62
  63 static struct child_event_ops child_events[] = {
  64         { .name = "kvm:kvm_s390_intercept_instruction",
  65           .get_key = event_icpt_insn_get_key },
  66         { .name = "kvm:kvm_s390_handle_sigp",
  67           .get_key = event_sigp_get_key },
  68         { .name = "kvm:kvm_s390_handle_diag",
  69           .get_key = event_diag_get_key },
  70         { .name = "kvm:kvm_s390_intercept_prog",
  71           .get_key = event_icpt_prog_get_key },
  72         { NULL, NULL },
  73 };
  74
  75 static struct kvm_events_ops exit_events = {
  76         .is_begin_event = exit_event_begin,
  77         .is_end_event = exit_event_end,
  78         .child_ops = child_events,
  79         .decode_key = exit_event_decode_key,
  80         .name = "VM-EXIT"
  81 };
  82
  83 const char *kvm_events_tp[] = {
  84         "kvm:kvm_s390_sie_enter",
  85         "kvm:kvm_s390_sie_exit",
  86         "kvm:kvm_s390_intercept_instruction",
  87         "kvm:kvm_s390_handle_sigp",
  88         "kvm:kvm_s390_handle_diag",
  89         "kvm:kvm_s390_intercept_prog",
  90         NULL,
  91 };
  92
  93 struct kvm_reg_events_ops kvm_reg_events_ops[] = {
  94         { .name = "vmexit", .ops = &exit_events },
  95         { NULL, NULL },
  96 };
  97
  98 const char * const kvm_skip_events[] = {
  99         "Wait state",
 100         NULL,
 101 };
 102
 103 int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
 104 {
 105         if (strstr(cpuid, "IBM/S390")) {
 106                 kvm->exit_reasons = sie_exit_reasons;
 107                 kvm->exit_reasons_isa = "SIE";
 108         } else
 109                 return -ENOTSUP;
 110
 111         return 0;
 112 }