diff options
| author | Vaibhav Jain <vaibhav@linux.ibm.com> | 2020-06-15 15:44:04 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2020-06-16 04:22:43 +0300 |
| commit | b791abf3201d724ac372c2ba1fa6e90d192e1dbf (patch) | |
| tree | 3a5fc69180e779bdbafc54bfcef37c1461b0fb0c /arch/powerpc/platforms/powermac/low_i2c.c | |
| parent | 97c02c723bcef11da2f46facdde7c34e72ec8a1f (diff) | |
| download | linux-b791abf3201d724ac372c2ba1fa6e90d192e1dbf.tar.xz | |
powerpc/papr_scm: Fetch nvdimm health information from PHYP
Implement support for fetching nvdimm health information via
H_SCM_HEALTH hcall as documented in Ref[1]. The hcall returns a pair
of 64-bit bitmap, bitwise-and of which is then stored in
'struct papr_scm_priv' and subsequently partially exposed to
user-space via newly introduced dimm specific attribute
'papr/flags'. Since the hcall is costly, the health information is
cached and only re-queried, 60s after the previous successful hcall.
The patch also adds a documentation text describing flags reported by
the the new sysfs attribute 'papr/flags' is also introduced at
Documentation/ABI/testing/sysfs-bus-papr-pmem.
[1] commit 58b278f568f0 ("powerpc: Provide initial documentation for
PAPR hcalls")
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20200615124407.32596-4-vaibhav@linux.ibm.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'arch/powerpc/platforms/powermac/low_i2c.c')
0 files changed, 0 insertions, 0 deletions