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

   1 What:           /sys/bus/event_source/devices/dmar*/format
   2 Date:           Jan 2023
   3 KernelVersion:  6.3
   4 Contact:        Kan Liang <kan.liang@linux.intel.com>
   5 Description:    Read-only.  Attribute group to describe the magic bits
   6                 that go into perf_event_attr.config,
   7                 perf_event_attr.config1 or perf_event_attr.config2 for
   8                 the IOMMU pmu.  (See also
   9                 ABI/testing/sysfs-bus-event_source-devices-format).
  10
  11                 Each attribute in this group defines a bit range in
  12                 perf_event_attr.config, perf_event_attr.config1,
  13                 or perf_event_attr.config2. All supported attributes
  14                 are listed below (See the VT-d Spec 4.0 for possible
  15                 attribute values)::
  16
  17                     event               = "config:0-27"   - event ID
  18                     event_group         = "config:28-31"  - event group ID
  19
  20                     filter_requester_en = "config1:0"     - Enable Requester ID filter
  21                     filter_domain_en    = "config1:1"     - Enable Domain ID filter
  22                     filter_pasid_en     = "config1:2"     - Enable PASID filter
  23                     filter_ats_en       = "config1:3"     - Enable Address Type filter
  24                     filter_page_table_en= "config1:4"     - Enable Page Table Level filter
  25                     filter_requester_id = "config1:16-31" - Requester ID filter
  26                     filter_domain       = "config1:32-47" - Domain ID filter
  27                     filter_pasid        = "config2:0-21"  - PASID filter
  28                     filter_ats          = "config2:24-28" - Address Type filter
  29                     filter_page_table   = "config2:32-36" - Page Table Level filter
  30
  31 What:           /sys/bus/event_source/devices/dmar*/cpumask
  32 Date:           Jan 2023
  33 KernelVersion:  6.3
  34 Contact:        Kan Liang <kan.liang@linux.intel.com>
  35 Description:    Read-only. This file always returns the CPU to which the
  36                 IOMMU pmu is bound for access to all IOMMU pmu performance
  37                 monitoring events.