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nvdimm(4): Export NVDIMM health flags via sysctl

Description

nvdimm(4): Export NVDIMM health flags via sysctl

The ACPI NFIT specification defines a set of "NVDIMM State Flags". These
flags are already reported by `acpidump -t', but this change makes them
available on a per-device basis, in a format that is more easily parsed.

To simplify this, introduce acpi_nfit_get_memory_maps_by_dimm(), which
locates the (ACPI_NFIT_MEMORY_MAP)s associated with a given
(nfit_handle_t).

Reviewed by: mav, cem
Tested by: mav, rpokala (version for stable/12)
MFC after: 3 days
Sponsored by: Panasas
Differential Revision: https://reviews.freebsd.org/D28700

(cherry picked from commit bdde49b7c7232c6936525f84ffb90856a7cd8e74)

Details

Provenance
rpokalaAuthored on Feb 16 2021, 8:03 AM
Reviewer
mav
Differential Revision
D28700: nvdimm(4): Export NVDIMM health flags via sysctl
Parents
rG780a76a6ec21: Revert "Revert 3c4fd2463bb2 since upstream libcxxrt fixed it in another way"
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