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[00/10] Add sysfs interface files to hv_gpci device to expose system information

Message ID 20230609114001.169235-1-kjain@linux.ibm.com (mailing list archive)
Headers show
Series Add sysfs interface files to hv_gpci device to expose system information | expand

Message

Kajol Jain June 9, 2023, 11:39 a.m. UTC 
The hcall H_GET_PERF_COUNTER_INFO can be used to get data related to
chips, dimms and system topology, by passing different counter request
values.
Patchset adds sysfs files to "/sys/devices/hv_gpci/interface/"
of hv_gpci pmu driver, which will expose system topology information
using H_GET_PERF_COUNTER_INFO hcall. The added sysfs files are
available for power10 and above platforms and needs root access
to read the data.

Patches 1,3,5,7,9 adds sysfs interface files to the hv_gpci
pmu driver, to get system topology information.

List of added sysfs files:
-> processor_bus_topology (Counter request value : 0xD0)
-> processor_config (Counter request value : 0x90)
-> affinity_domain_via_virtual_processor (Counter request value : 0xA0)
-> affinity_domain_via_domain (Counter request value : 0xB0)
-> affinity_domain_via_partition (Counter request value : 0xB1)

Patches 2,4,6,8,10 adds details of the newly added hv_gpci
interface files listed above in the ABI documentation.

Kajol Jain (10):
  powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show
    processor bus topology information
  docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document
    processor_bus_topology sysfs interface file
  powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show
    processor config information
  docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document
    processor_config sysfs interface file
  powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity
    domain via virtual processor information
  docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document
    affinity_domain_via_virtual_processor sysfs interface file
  powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity
    domain via domain information
  docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document
    affinity_domain_via_domain sysfs interface file
  powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity
    domain via partition information
  docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document
    affinity_domain_via_partition sysfs interface file

 .../sysfs-bus-event_source-devices-hv_gpci    |  89 +++
 arch/powerpc/perf/hv-gpci.c                   | 584 +++++++++++++++++-
 arch/powerpc/perf/hv-gpci.h                   |  15 +
 3 files changed, 686 insertions(+), 2 deletions(-)