On Tue, 01 Feb 2022 07:19:46 -0800, Tvrtko Ursulin wrote: > > From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > > Print out end user friendly help text when the running user has > insufficient privilege for accessing system wide performance counters. Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> > Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > Issue: https://gitlab.freedesktop.org/drm/intel/-/issues/5018 > --- > tools/intel_gpu_top.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c > index 81c724d1fe1c..0404a5881b40 100644 > --- a/tools/intel_gpu_top.c > +++ b/tools/intel_gpu_top.c > @@ -1761,6 +1761,15 @@ int main(int argc, char **argv) > if (ret) { > fprintf(stderr, > "Failed to initialize PMU! (%s)\n", strerror(errno)); > + if (errno == EACCES && geteuid()) > + fprintf(stderr, > +"\n" > +"When running as a normal user CAP_PERFMON is required to access performance\n" > +"monitoring. See \"man 7 capabilities\", \"man 8 setcap\", or contact your\n" > +"distribution vendor for assistance.\n" > +"\n" > +"More information can be found at 'Perf events and tool security' document:\n" > +"https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n";); > ret = EXIT_FAILURE; > goto err; > } > -- > 2.32.0 >
