powerpc/perf/hv_{gpci, 24x7}: Add documentation of device attributes
gpci and 24x7 expose some device specific attributes. Add some documentation for them. Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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What: /sys/bus/event_source/devices/hv_24x7/interface/catalog
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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Provides access to the binary "24x7 catalog" provided by the
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hypervisor on POWER7 and 8 systems. This catalog lists events
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avaliable from the powerpc "hv_24x7" pmu. Its format is
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documented here:
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https://raw.githubusercontent.com/jmesmon/catalog-24x7/master/hv-24x7-catalog.h
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What: /sys/bus/event_source/devices/hv_24x7/interface/catalog_length
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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A number equal to the length in bytes of the catalog. This is
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also extractable from the provided binary "catalog" sysfs entry.
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What: /sys/bus/event_source/devices/hv_24x7/interface/catalog_version
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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Exposes the "version" field of the 24x7 catalog. This is also
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extractable from the provided binary "catalog" sysfs entry.
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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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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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'0' if the hypervisor is configured to forbid access to event
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counters being accumulated by other guests and to physical
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domain event counters.
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'1' if that access is allowed.
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What: /sys/bus/event_source/devices/hv_gpci/interface/ga
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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0 or 1. Indicates whether we have access to "GA" events (listed
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in arch/powerpc/perf/hv-gpci.h).
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What: /sys/bus/event_source/devices/hv_gpci/interface/expanded
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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0 or 1. Indicates whether we have access to "EXPANDED" events (listed
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in arch/powerpc/perf/hv-gpci.h).
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What: /sys/bus/event_source/devices/hv_gpci/interface/lab
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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0 or 1. Indicates whether we have access to "LAB" events (listed
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in arch/powerpc/perf/hv-gpci.h).
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What: /sys/bus/event_source/devices/hv_gpci/interface/version
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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A number indicating the version of the gpci interface that the
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hypervisor reports supporting.
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What: /sys/bus/event_source/devices/hv_gpci/interface/kernel_version
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Date: February 2014
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Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
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Description:
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A number indicating the latest version of the gpci interface
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that the kernel is aware of.
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