diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-papr-pmem')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-papr-pmem | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-papr-pmem b/Documentation/ABI/testing/sysfs-bus-papr-pmem new file mode 100644 index 000000000..4ac067390 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-papr-pmem @@ -0,0 +1,75 @@ +What: /sys/bus/nd/devices/nmemX/papr/flags +Date: Apr, 2020 +KernelVersion: v5.8 +Contact: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, nvdimm@lists.linux.dev, +Description: + (RO) Report flags indicating various states of a + papr-pmem NVDIMM device. Each flag maps to a one or + more bits set in the dimm-health-bitmap retrieved in + response to H_SCM_HEALTH hcall. The details of the bit + flags returned in response to this hcall is available + at 'Documentation/powerpc/papr_hcalls.rst' . Below are + the flags reported in this sysfs file: + + * "not_armed" + Indicates that NVDIMM contents will not + survive a power cycle. + * "flush_fail" + Indicates that NVDIMM contents + couldn't be flushed during last + shut-down event. + * "restore_fail" + Indicates that NVDIMM contents + couldn't be restored during NVDIMM + initialization. + * "encrypted" + NVDIMM contents are encrypted. + * "smart_notify" + There is health event for the NVDIMM. + * "scrubbed" + Indicating that contents of the + NVDIMM have been scrubbed. + * "locked" + Indicating that NVDIMM contents cant + be modified until next power cycle. + +What: /sys/bus/nd/devices/nmemX/papr/perf_stats +Date: May, 2020 +KernelVersion: v5.9 +Contact: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, nvdimm@lists.linux.dev, +Description: + (RO) Report various performance stats related to papr-scm NVDIMM + device. This attribute is only available for NVDIMM devices + that support reporting NVDIMM performance stats. Each stat is + reported on a new line with each line composed of a + stat-identifier followed by it value. Below are currently known + dimm performance stats which are reported: + + * "CtlResCt" : Controller Reset Count + * "CtlResTm" : Controller Reset Elapsed Time + * "PonSecs " : Power-on Seconds + * "MemLife " : Life Remaining + * "CritRscU" : Critical Resource Utilization + * "HostLCnt" : Host Load Count + * "HostSCnt" : Host Store Count + * "HostSDur" : Host Store Duration + * "HostLDur" : Host Load Duration + * "MedRCnt " : Media Read Count + * "MedWCnt " : Media Write Count + * "MedRDur " : Media Read Duration + * "MedWDur " : Media Write Duration + * "CchRHCnt" : Cache Read Hit Count + * "CchWHCnt" : Cache Write Hit Count + * "FastWCnt" : Fast Write Count + +What: /sys/bus/nd/devices/nmemX/papr/health_bitmap_inject +Date: Jan, 2022 +KernelVersion: v5.17 +Contact: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, nvdimm@lists.linux.dev, +Description: + (RO) Reports the health bitmap inject bitmap that is applied to + bitmap received from PowerVM via the H_SCM_HEALTH. This is used + to forcibly set specific bits returned from Hcall. These is then + used to simulate various health or shutdown states for an nvdimm + and are set by user-space tools like ndctl by issuing a PAPR DSM. + |