[PATCH AUTOSEL 4.19 176/177] perf intel-bts: Does not support AUX area sampling

From: Sasha Levin
Date: Tue Dec 10 2019 - 16:36:15 EST


From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

[ Upstream commit 32a1ece4bdbde24734ab16484bad7316f03fc42d ]

Add an error message because Intel BTS does not support AUX area
sampling.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20191115124225.5247-16-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/perf/arch/x86/util/auxtrace.c | 2 ++
tools/perf/arch/x86/util/intel-bts.c | 5 +++++
2 files changed, 7 insertions(+)

diff --git a/tools/perf/arch/x86/util/auxtrace.c b/tools/perf/arch/x86/util/auxtrace.c
index b135af62011ce..c28b6516d41d9 100644
--- a/tools/perf/arch/x86/util/auxtrace.c
+++ b/tools/perf/arch/x86/util/auxtrace.c
@@ -36,6 +36,8 @@ struct auxtrace_record *auxtrace_record__init_intel(struct perf_evlist *evlist,

intel_pt_pmu = perf_pmu__find(INTEL_PT_PMU_NAME);
intel_bts_pmu = perf_pmu__find(INTEL_BTS_PMU_NAME);
+ if (intel_bts_pmu)
+ intel_bts_pmu->auxtrace = true;

evlist__for_each_entry(evlist, evsel) {
if (intel_pt_pmu && evsel->attr.type == intel_pt_pmu->type)
diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c
index 781df40b29660..b6120ef8b4a45 100644
--- a/tools/perf/arch/x86/util/intel-bts.c
+++ b/tools/perf/arch/x86/util/intel-bts.c
@@ -118,6 +118,11 @@ static int intel_bts_recording_options(struct auxtrace_record *itr,
const struct cpu_map *cpus = evlist->cpus;
bool privileged = geteuid() == 0 || perf_event_paranoid() < 0;

+ if (opts->auxtrace_sample_mode) {
+ pr_err("Intel BTS does not support AUX area sampling\n");
+ return -EINVAL;
+ }
+
btsr->evlist = evlist;
btsr->snapshot_mode = opts->auxtrace_snapshot_mode;

--
2.20.1