diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-event_source-devices-iommu')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-event_source-devices-iommu | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-iommu b/Documentation/ABI/testing/sysfs-bus-event_source-devices-iommu new file mode 100644 index 0000000000..d7af491930 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-iommu @@ -0,0 +1,37 @@ +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. |