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Documentation/ABI: Add ABI documentation for hv-gpci format
This patch adds ABI documentation for hv-gpci event format. Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201003074943.338618-3-kjain@linux.ibm.com
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What: /sys/bus/event_source/devices/hv_gpci/format
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Date: September 2020
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Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
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Description: Read-only. Attribute group to describe the magic bits
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that go into perf_event_attr.config for a particular pmu.
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(See ABI/testing/sysfs-bus-event_source-devices-format).
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Each attribute under this group defines a bit range of the
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perf_event_attr.config. All supported attributes are listed
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below.
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counter_info_version = "config:16-23"
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length = "config:24-31"
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partition_id = "config:32-63"
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request = "config:0-31"
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sibling_part_id = "config:32-63"
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hw_chip_id = "config:32-63"
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offset = "config:32-63"
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phys_processor_idx = "config:32-63"
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secondary_index = "config:0-15"
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starting_index = "config:32-63"
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For example,
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processor_core_utilization_instructions_completed = "request=0x94,
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phys_processor_idx=?,counter_info_version=0x8,
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length=8,offset=0x18"
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In this event, '?' after phys_processor_idx specifies this value
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this value will be provided by user while running this event.
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What: /sys/bus/event_source/devices/hv_gpci/interface/collect_privileged
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What: /sys/bus/event_source/devices/hv_gpci/interface/collect_privileged
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Date: February 2014
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Date: February 2014
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Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
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Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
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