diff options
Diffstat (limited to 'tools/perf/arch/powerpc/util/kvm-stat.c')
| -rw-r--r-- | tools/perf/arch/powerpc/util/kvm-stat.c | 75 |
1 files changed, 61 insertions, 14 deletions
diff --git a/tools/perf/arch/powerpc/util/kvm-stat.c b/tools/perf/arch/powerpc/util/kvm-stat.c index 596ad6aedaac..c8357b571ccf 100644 --- a/tools/perf/arch/powerpc/util/kvm-stat.c +++ b/tools/perf/arch/powerpc/util/kvm-stat.c @@ -3,14 +3,17 @@ #include "util/kvm-stat.h" #include "util/parse-events.h" #include "util/debug.h" +#include "util/evsel.h" +#include "util/evlist.h" +#include "util/pmus.h" #include "book3s_hv_exits.h" #include "book3s_hcalls.h" +#include <subcmd/parse-options.h> #define NR_TPS 4 const char *vcpu_id_str = "vcpu_id"; -const int decode_str_len = 40; const char *kvm_entry_trace = "kvm_hv:kvm_guest_enter"; const char *kvm_exit_trace = "kvm_hv:kvm_guest_exit"; @@ -30,12 +33,12 @@ const char *ppc_book3s_hv_kvm_tp[] = { const char *kvm_events_tp[NR_TPS + 1]; const char *kvm_exit_reason; -static void hcall_event_get_key(struct perf_evsel *evsel, +static void hcall_event_get_key(struct evsel *evsel, struct perf_sample *sample, struct event_key *key) { key->info = 0; - key->key = perf_evsel__intval(evsel, sample, "req"); + key->key = evsel__intval(evsel, sample, "req"); } static const char *get_hcall_exit_reason(u64 exit_code) @@ -53,17 +56,17 @@ static const char *get_hcall_exit_reason(u64 exit_code) return "UNKNOWN"; } -static bool hcall_event_end(struct perf_evsel *evsel, +static bool hcall_event_end(struct evsel *evsel, struct perf_sample *sample __maybe_unused, struct event_key *key __maybe_unused) { - return (!strcmp(evsel->name, kvm_events_tp[3])); + return (evsel__name_is(evsel, kvm_events_tp[3])); } -static bool hcall_event_begin(struct perf_evsel *evsel, +static bool hcall_event_begin(struct evsel *evsel, struct perf_sample *sample, struct event_key *key) { - if (!strcmp(evsel->name, kvm_events_tp[2])) { + if (evsel__name_is(evsel, kvm_events_tp[2])) { hcall_event_get_key(evsel, sample, key); return true; } @@ -76,7 +79,7 @@ static void hcall_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused, { const char *hcall_reason = get_hcall_exit_reason(key->key); - scnprintf(decode, decode_str_len, "%s", hcall_reason); + scnprintf(decode, KVM_EVENT_NAME_LEN, "%s", hcall_reason); } static struct kvm_events_ops hcall_events = { @@ -104,20 +107,21 @@ const char * const kvm_skip_events[] = { }; -static int is_tracepoint_available(const char *str, struct perf_evlist *evlist) +static int is_tracepoint_available(const char *str, struct evlist *evlist) { struct parse_events_error err; int ret; - err.str = NULL; + parse_events_error__init(&err); ret = parse_events(evlist, str, &err); - if (err.str) - pr_err("%s : %s\n", str, err.str); + if (ret) + parse_events_error__print(&err, "tracepoint"); + parse_events_error__exit(&err); return ret; } static int ppc__setup_book3s_hv(struct perf_kvm_stat *kvm, - struct perf_evlist *evlist) + struct evlist *evlist) { const char **events_ptr; int i, nr_tp = 0, err = -1; @@ -144,7 +148,7 @@ static int ppc__setup_book3s_hv(struct perf_kvm_stat *kvm, /* Wrapper to setup kvm tracepoints */ static int ppc__setup_kvm_tp(struct perf_kvm_stat *kvm) { - struct perf_evlist *evlist = perf_evlist__new(); + struct evlist *evlist = evlist__new(); if (evlist == NULL) return -ENOMEM; @@ -170,3 +174,46 @@ int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused) return ret; } + +/* + * In case of powerpc architecture, pmu registers are programmable + * by guest kernel. So monitoring guest via host may not provide + * valid samples with default 'cycles' event. It is better to use + * 'trace_imc/trace_cycles' event for guest profiling, since it + * can track the guest instruction pointer in the trace-record. + * + * Function to parse the arguments and return appropriate values. + */ +int kvm_add_default_arch_event(int *argc, const char **argv) +{ + const char **tmp; + bool event = false; + int i, j = *argc; + + const struct option event_options[] = { + OPT_BOOLEAN('e', "event", &event, NULL), + OPT_END() + }; + + tmp = calloc(j + 1, sizeof(char *)); + if (!tmp) + return -EINVAL; + + for (i = 0; i < j; i++) + tmp[i] = argv[i]; + + parse_options(j, tmp, event_options, NULL, PARSE_OPT_KEEP_UNKNOWN); + if (!event) { + if (perf_pmus__have_event("trace_imc", "trace_cycles")) { + argv[j++] = strdup("-e"); + argv[j++] = strdup("trace_imc/trace_cycles/"); + *argc += 2; + } else { + free(tmp); + return -EINVAL; + } + } + + free(tmp); + return 0; +} |