--- zzzz-none-000/linux-3.10.107/Documentation/ABI/testing/sysfs-bus-event_source-devices-format 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/Documentation/ABI/testing/sysfs-bus-event_source-devices-format 2021-02-04 17:41:59.000000000 +0000 @@ -9,6 +9,12 @@ we want to export, so that userspace can deal with sane name/value pairs. + Userspace must be prepared for the possibility that attributes + define overlapping bit ranges. For example: + attr1 = 'config:0-23' + attr2 = 'config:0-7' + attr3 = 'config:12-35' + Example: 'config1:1,6-10,44' Defines contents of attribute that occupies bits 1,6-10,44 of perf_event_attr::config1.