powerpc/papr_scm: Mark nvdimm as unarmed if needed during probe
authorVaibhav Jain <vaibhav@linux.ibm.com>
Mon, 29 Mar 2021 11:31:03 +0000 (17:01 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 27 Apr 2021 13:47:02 +0000 (23:47 +1000)
commitadb68c38d8d49a3d60805479c558649bb2182473
tree6ed1ef90b9e0dcc8d7f337dddee6015039c573a6
parentee1bc694fbaec1a662770703fc34a74abf418938
powerpc/papr_scm: Mark nvdimm as unarmed if needed during probe

In case an nvdimm is found to be unarmed during probe then set its
NDD_UNARMED flag before nvdimm_create(). This would enforce a
read-only access to the ndimm region. Presently even if an nvdimm is
unarmed its not marked as read-only on ppc64 guests.

The patch updates papr_scm_nvdimm_init() to force query of nvdimm
health via __drc_pmem_query_health() and if nvdimm is found to be
unarmed then set the nvdimm flag ND_UNARMED for nvdimm_create().

Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210329113103.476760-1-vaibhav@linux.ibm.com
arch/powerpc/platforms/pseries/papr_scm.c