On Mon, 29 Mar 2021 13:36:43 -0400, Shivaprasad G Bhat wrote:

Add support for ND_REGION_ASYNC capability if the device tree
indicates 'ibm,hcall-flush-required' property in the NVDIMM node.
Flush is done by issuing H_SCM_FLUSH hcall to the hypervisor.

If the flush request failed, the hypervisor is expected to
to reflect the problem in the subsequent nvdimm H_SCM_HEALTH call.

[...]

Applied to powerpc/next.

[1/1] powerpc/papr_scm: Implement support for H_SCM_FLUSH hcall
      https://git.kernel.org/powerpc/c/75b7c05ebf902632f7f540c3eb0a8945c2d74aab

cheers