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