linux-kernel - [PATCH RFC 09/21] perf auxtrace: Record whether an auxtrace mmap is needed

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Message-Id: <20220422162402.147958-10-adrian.hunter@intel.com>
Date:   Fri, 22 Apr 2022 19:23:50 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Ian Rogers <irogers@...gle.com>,
        Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Leo Yan <leo.yan@...aro.org>, linux-kernel@...r.kernel.org
Subject: [PATCH RFC 09/21] perf auxtrace: Record whether an auxtrace mmap is needed

Add a flag needs_auxtrace_mmap to record whether an auxtrace mmap is
needed, in preparation for correctly determining whether or not an
auxtrace mmap is needed.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/arch/arm/util/cs-etm.c    | 1 +
 tools/perf/arch/arm64/util/arm-spe.c | 1 +
 tools/perf/arch/s390/util/auxtrace.c | 1 +
 tools/perf/arch/x86/util/intel-bts.c | 1 +
 tools/perf/arch/x86/util/intel-pt.c  | 1 +
 tools/perf/util/evsel.h              | 1 +
 6 files changed, 6 insertions(+)

diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index 11c71aa219f7..1b54638d53b0 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -319,6 +319,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
 			}
 			evsel->core.attr.freq = 0;
 			evsel->core.attr.sample_period = 1;
+			evsel->needs_auxtrace_mmap = true;
 			cs_etm_evsel = evsel;
 			opts->full_auxtrace = true;
 		}
diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c
index af4d63af8072..e24c22f187df 100644
--- a/tools/perf/arch/arm64/util/arm-spe.c
+++ b/tools/perf/arch/arm64/util/arm-spe.c
@@ -159,6 +159,7 @@ static int arm_spe_recording_options(struct auxtrace_record *itr,
 			}
 			evsel->core.attr.freq = 0;
 			evsel->core.attr.sample_period = arm_spe_pmu->default_config->sample_period;
+			evsel->needs_auxtrace_mmap = true;
 			arm_spe_evsel = evsel;
 			opts->full_auxtrace = true;
 		}
diff --git a/tools/perf/arch/s390/util/auxtrace.c b/tools/perf/arch/s390/util/auxtrace.c
index 0db5c58c98e8..5068baa3e092 100644
--- a/tools/perf/arch/s390/util/auxtrace.c
+++ b/tools/perf/arch/s390/util/auxtrace.c
@@ -98,6 +98,7 @@ struct auxtrace_record *auxtrace_record__init(struct evlist *evlist,
 	evlist__for_each_entry(evlist, pos) {
 		if (pos->core.attr.config == PERF_EVENT_CPUM_SF_DIAG) {
 			diagnose = 1;
+			pos->needs_auxtrace_mmap = true;
 			break;
 		}
 	}
diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c
index d68a0f48e41e..bcccfbade5c6 100644
--- a/tools/perf/arch/x86/util/intel-bts.c
+++ b/tools/perf/arch/x86/util/intel-bts.c
@@ -129,6 +129,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr,
 			}
 			evsel->core.attr.freq = 0;
 			evsel->core.attr.sample_period = 1;
+			evsel->needs_auxtrace_mmap = true;
 			intel_bts_evsel = evsel;
 			opts->full_auxtrace = true;
 		}
diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 38ec2666ec12..2eaac4638aab 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -649,6 +649,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 			evsel->core.attr.freq = 0;
 			evsel->core.attr.sample_period = 1;
 			evsel->no_aux_samples = true;
+			evsel->needs_auxtrace_mmap = true;
 			intel_pt_evsel = evsel;
 			opts->full_auxtrace = true;
 		}
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 041b42d33bf5..1a07694afbdd 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -120,6 +120,7 @@ struct evsel {
 	bool			merged_stat;
 	bool			reset_group;
 	bool			errored;
+	bool			needs_auxtrace_mmap;
 	struct hashmap		*per_pkg_mask;
 	int			err;
 	struct {
-- 
2.25.1