On 01/02/2022 16:10, Dixit, Ashutosh wrote:
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>
Pushed, thank you!
Regards,
Tvrtko
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
