Update papr_scm.c to query dimm performance statistics from PHYP via
H_SCM_PERFORMANCE_STATS hcall and export them to user-space as PAPR
specific NVDIMM attribute 'perf_stats' in sysfs. The patch also
provide a sysfs ABI documentation for the stats being reported and
their meanings.
During NVDIMM
We add support for reporting 'fuel-gauge' NVDIMM metric via
PAPR_PDSM_HEALTH pdsm payload. 'fuel-gauge' metric indicates the usage
life remaining of a papr-scm compatible NVDIMM. PHYP exposes this
metric via the H_SCM_PERFORMANCE_STATS.
The metric value is returned from the pdsm by extending the r
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 [1] output for
should be like:
$ sudo ndctl list -DH
[
{
"dev":"nmem0",
"health":{
"health_sta
Dan Williams writes:
> Hi Linus, please pull from:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
> tags/libnvdimm-for-5.8-rc2
>
> ...to receive a feature (papr_scm health retrieval) and a fix (sysfs
> attribute visibility) for v5.8.
>
> Vaibhav explains in the merge commit belo
