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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>
hifive-unleashed-5.1
Cody P Schafer 2014-03-14 16:00:44 +11:00 committed by Benjamin Herrenschmidt
parent 30daeb6c8f
commit ad0a02b834
2 changed files with 66 additions and 0 deletions
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Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 100644
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What: /sys/bus/event_source/devices/hv_24x7/interface/catalog
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
Provides access to the binary "24x7 catalog" provided by the
hypervisor on POWER7 and 8 systems. This catalog lists events
avaliable from the powerpc "hv_24x7" pmu. Its format is
documented here:
https://raw.githubusercontent.com/jmesmon/catalog-24x7/master/hv-24x7-catalog.h
What: /sys/bus/event_source/devices/hv_24x7/interface/catalog_length
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
A number equal to the length in bytes of the catalog. This is
also extractable from the provided binary "catalog" sysfs entry.
What: /sys/bus/event_source/devices/hv_24x7/interface/catalog_version
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
Exposes the "version" field of the 24x7 catalog. This is also
extractable from the provided binary "catalog" sysfs entry.

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Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci 100644
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What: /sys/bus/event_source/devices/hv_gpci/interface/collect_privileged
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
'0' if the hypervisor is configured to forbid access to event
counters being accumulated by other guests and to physical
domain event counters.
'1' if that access is allowed.
What: /sys/bus/event_source/devices/hv_gpci/interface/ga
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
0 or 1. Indicates whether we have access to "GA" events (listed
in arch/powerpc/perf/hv-gpci.h).
What: /sys/bus/event_source/devices/hv_gpci/interface/expanded
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
0 or 1. Indicates whether we have access to "EXPANDED" events (listed
in arch/powerpc/perf/hv-gpci.h).
What: /sys/bus/event_source/devices/hv_gpci/interface/lab
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
0 or 1. Indicates whether we have access to "LAB" events (listed
in arch/powerpc/perf/hv-gpci.h).
What: /sys/bus/event_source/devices/hv_gpci/interface/version
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
A number indicating the version of the gpci interface that the
hypervisor reports supporting.
What: /sys/bus/event_source/devices/hv_gpci/interface/kernel_version
Date: February 2014
Contact: Cody P Schafer <cody@linux.vnet.ibm.com>
Description:
A number indicating the latest version of the gpci interface
that the kernel is aware of.