Commit dda1bf8e authored by Igor Lubashev's avatar Igor Lubashev Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Use CAP_SYS_ADMIN with perf_event_paranoid checks 



The kernel is using CAP_SYS_ADMIN instead of euid==0 to override
perf_event_paranoid check. Make perf do the same.

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> # coresight part
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1566869956-7154-3-git-send-email-ilubashe@akamai.com


Signed-off-by: default avatarIgor Lubashev <ilubashe@akamai.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e9a6882f

tools/perf/arch/arm/util/cs-etm.c

+2 −1
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include "../../util/record.h"

#include "../../util/auxtrace.h"

#include "../../util/cpumap.h"

#include "../../util/event.h"

#include "../../util/evlist.h"

#include "../../util/evsel.h"

#include "../../util/pmu.h"
@@ -254,7 +255,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr, 
	struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;

	struct evsel *evsel, *cs_etm_evsel = NULL;

	struct perf_cpu_map *cpus = evlist->core.cpus;

	bool privileged = (geteuid() == 0 || perf_event_paranoid() < 0);

	bool privileged = perf_event_paranoid_check(-1);

	int err = 0;



	ptr->evlist = evlist;

tools/perf/arch/arm64/util/arm-spe.c

+2 −1
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <time.h>



#include "../../util/cpumap.h"

#include "../../util/event.h"

#include "../../util/evsel.h"

#include "../../util/evlist.h"

#include "../../util/session.h"
@@ -67,7 +68,7 @@ static int arm_spe_recording_options(struct auxtrace_record *itr, 
			container_of(itr, struct arm_spe_recording, itr);

	struct perf_pmu *arm_spe_pmu = sper->arm_spe_pmu;

	struct evsel *evsel, *arm_spe_evsel = NULL;

	bool privileged = geteuid() == 0 || perf_event_paranoid() < 0;

	bool privileged = perf_event_paranoid_check(-1);

	struct evsel *tracking_evsel;

	int err;

tools/perf/arch/x86/util/intel-bts.c

+2 −1
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/zalloc.h>



#include "../../util/cpumap.h"

#include "../../util/event.h"

#include "../../util/evsel.h"

#include "../../util/evlist.h"

#include "../../util/session.h"
@@ -108,7 +109,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr, 
	struct perf_pmu *intel_bts_pmu = btsr->intel_bts_pmu;

	struct evsel *evsel, *intel_bts_evsel = NULL;

	const struct perf_cpu_map *cpus = evlist->core.cpus;

	bool privileged = geteuid() == 0 || perf_event_paranoid() < 0;

	bool privileged = perf_event_paranoid_check(-1);



	btsr->evlist = evlist;

	btsr->snapshot_mode = opts->auxtrace_snapshot_mode;

tools/perf/arch/x86/util/intel-pt.c

+1 −1
Original line number Diff line number Diff line
@@ -579,7 +579,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr, 
	bool have_timing_info, need_immediate = false;

	struct evsel *evsel, *intel_pt_evsel = NULL;

	const struct perf_cpu_map *cpus = evlist->core.cpus;

	bool privileged = geteuid() == 0 || perf_event_paranoid() < 0;

	bool privileged = perf_event_paranoid_check(-1);

	u64 tsc_bit;

	int err;

tools/perf/util/evsel.c

+1 −1
Original line number Diff line number Diff line
@@ -282,7 +282,7 @@ struct evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) 


static bool perf_event_can_profile_kernel(void)

{

	return geteuid() == 0 || perf_event_paranoid() == -1;

	return perf_event_paranoid_check(-1);

}



struct evsel *perf_evsel__new_cycles(bool precise)