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1What: /sys/bus/event_source/devices/dmar*/format2Date: Jan 20233KernelVersion: 6.34Contact: Kan Liang <kan.liang@linux.intel.com>5Description: Read-only. Attribute group to describe the magic bits6 that go into perf_event_attr.config,7 perf_event_attr.config1 or perf_event_attr.config2 for8 the IOMMU pmu. (See also9 ABI/testing/sysfs-bus-event_source-devices-format).10 11 Each attribute in this group defines a bit range in12 perf_event_attr.config, perf_event_attr.config1,13 or perf_event_attr.config2. All supported attributes14 are listed below (See the VT-d Spec 4.0 for possible15 attribute values)::16 17 event = "config:0-27" - event ID18 event_group = "config:28-31" - event group ID19 20 filter_requester_en = "config1:0" - Enable Requester ID filter21 filter_domain_en = "config1:1" - Enable Domain ID filter22 filter_pasid_en = "config1:2" - Enable PASID filter23 filter_ats_en = "config1:3" - Enable Address Type filter24 filter_page_table_en= "config1:4" - Enable Page Table Level filter25 filter_requester_id = "config1:16-31" - Requester ID filter26 filter_domain = "config1:32-47" - Domain ID filter27 filter_pasid = "config2:0-21" - PASID filter28 filter_ats = "config2:24-28" - Address Type filter29 filter_page_table = "config2:32-36" - Page Table Level filter30 31What: /sys/bus/event_source/devices/dmar*/cpumask32Date: Jan 202333KernelVersion: 6.334Contact: Kan Liang <kan.liang@linux.intel.com>35Description: Read-only. This file always returns the CPU to which the36 IOMMU pmu is bound for access to all IOMMU pmu performance37 monitoring events.38