Documentation/ABI/testing/sysfs-bus-event_source-devices-format

   1 What:           /sys/bus/event_source/devices/<dev>/format
   2 Date:           January 2012
   3 KernelVersion: 3.3
   4 Contact:        Jiri Olsa <jolsa@redhat.com>
   5 Description:
   6                 Attribute group to describe the magic bits that go into
   7                 perf_event_attr::config[012] for a particular pmu.
   8                 Each attribute of this group defines the 'hardware' bitmask
   9                 we want to export, so that userspace can deal with sane
  10                 name/value pairs.
  11
  12                 Userspace must be prepared for the possibility that attributes
  13                 define overlapping bit ranges. For example::
  14
  15                         attr1 = 'config:0-23'
  16                         attr2 = 'config:0-7'
  17                         attr3 = 'config:12-35'
  18
  19                 Example: 'config1:1,6-10,44'
  20                 Defines contents of attribute that occupies bits 1,6-10,44 of
  21                 perf_event_attr::config1.