| Message ID | 20200731064153.182203-1-vaibhav@linux.ibm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | powerpc/papr_scm: add support for reporting NVDIMM 'life_used_percentage' metric | expand |
On Fri, 31 Jul 2020 12:11:51 +0530, Vaibhav Jain wrote: > Changes since v3[1]: > > * Fixed a rebase issue pointed out by Aneesh in first patch in the series. > > [1] https://lore.kernel.org/linux-nvdimm/20200730121303.134230-1-vaibhav@linux.ibm.com Applied to powerpc/next. [1/2] powerpc/papr_scm: Fetch nvdimm performance stats from PHYP https://git.kernel.org/powerpc/c/2d02bf835e5731de632c8a13567905fa7c0da01c [2/2] powerpc/papr_scm: Add support for fetching nvdimm 'fuel-gauge' metric https://git.kernel.org/powerpc/c/af0870c4e75655b1931d0a5ffde2f448a2794362 cheers
Changes since v3[1]: * Fixed a rebase issue pointed out by Aneesh in first patch in the series. [1] https://lore.kernel.org/linux-nvdimm/20200730121303.134230-1-vaibhav@linux.ibm.com --- This small patchset implements kernel side support for reporting 'life_used_percentage' metric in NDCTL with dimm health output for papr-scm NVDIMMs. With corresponding NDCTL side changes output for should be like: $ sudo ndctl list -DH [ { "dev":"nmem0", "health":{ "health_state":"ok", "life_used_percentage":0, "shutdown_state":"clean" } } ] PHYP supports H_SCM_PERFORMANCE_STATS hcall through which an LPAR can fetch various performance stats including 'fuel_gauge' percentage for an NVDIMM. 'fuel_gauge' metric indicates the usable life remaining of an NVDIMM expressed as percentage and 'life_used_percentage' can be calculated as 'life_used_percentage = 100 - fuel_gauge'. Structure of the patchset ========================= First patch implements necessary scaffolding needed to issue the H_SCM_PERFORMANCE_STATS hcall and fetch performance stats catalogue. The patch also implements support for 'perf_stats' sysfs attribute to report the full catalogue of supported performance stats by PHYP. Second and final patch implements support for sending this value to libndctl by extending the PAPR_PDSM_HEALTH pdsm payload to add a new field named 'dimm_fuel_gauge' to it. Vaibhav Jain (2): powerpc/papr_scm: Fetch nvdimm performance stats from PHYP powerpc/papr_scm: Add support for fetching nvdimm 'fuel-gauge' metric Documentation/ABI/testing/sysfs-bus-papr-pmem | 27 +++ arch/powerpc/include/uapi/asm/papr_pdsm.h | 9 + arch/powerpc/platforms/pseries/papr_scm.c | 199 ++++++++++++++++++ 3 files changed, 235 insertions(+)