| Message ID | 20230729073455.7918-1-kjain@linux.ibm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add sysfs interface files to hv_gpci device to expose system information | expand |
On Sat, 29 Jul 2023 13:04:45 +0530, Kajol Jain wrote: > 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. > > [...] Applied to powerpc/next. [01/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor bus topology information https://git.kernel.org/powerpc/c/71f1c39647d8c9d4d54a861ec81f1ff17544bcb6 [02/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_bus_topology sysfs interface file https://git.kernel.org/powerpc/c/9caf9e2b8bae58e39501f6fb1fc9189009538ccc [03/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor config information https://git.kernel.org/powerpc/c/1a160c2a13c66c9ad47436e73c821f3d26818733 [04/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_config sysfs interface file https://git.kernel.org/powerpc/c/3255171d3e861b14e4248a5c676099819cadfb6d [05/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via virtual processor information https://git.kernel.org/powerpc/c/71a7ccb478fcfe1495bcabf4972d859b24264df7 [06/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_virtual_processor sysfs interface file https://git.kernel.org/powerpc/c/cc89ff3491b61cebc90b3394eb6b36635173d0dd [07/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via domain information https://git.kernel.org/powerpc/c/a69a57cac1ec8995bb0b571dfccc3fe2f046719a [08/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_domain sysfs interface file https://git.kernel.org/powerpc/c/ab7e991286e729b0018722591c04eb2fd31771b0 [09/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via partition information https://git.kernel.org/powerpc/c/a15e0d6a6929e737f71578ed4b05531fed5a96e8 [10/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_partition sysfs interface file https://git.kernel.org/powerpc/c/8df99066940b6c82a0851f13adf653827dc524f7 cheers
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. Patches 2,4,6,8,10 adds details of the newly added hv_gpci interface files listed above in the ABI documentation. Changelog: v3 -> v4 -> Add Reviewed-by tag from Athira Rajeev. -> Correct typo by changing processor_bug_topology to processor_bus_topology v2 -> v3 -> Make nit changes in documentation patches as suggested by Randy Dunlap. v1 -> v2 -> Incase the HCALL fails with errors that can be resolve during runtime, then only add sysinfo interface attributes to the interface_attrs attribute array. Even if one of the counter request value HCALL fails, don't add any sysinfo attribute to the interface_attrs attribute array. Add the code changes to make sure sysinfo interface added only when all the requirements met as suggested by Michael Ellerman. -> Make changes in documentation, adds detail of errors type which can be resolved at runtime as suggested by Michael Ellerman. -> Add new enum and sysinfo_counter_request array to get required counter request value in hv-gpci.c file. -> Move the macros for interface attribute array index to hv-gpci.c, as these macros currently only used in hv-gpci.c file. 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 | 160 +++++ arch/powerpc/perf/hv-gpci.c | 640 +++++++++++++++++- 2 files changed, 798 insertions(+), 2 deletions(-)