Microsoft and Intel NVDIMM ACPI _DSM interfaces status?

[Stefan Hajnoczi]

Hi,
Microsoft and Intel developed two different ACPI NVDIMM _DSM interfaces.

The specs for the Intel interface are available here:
https://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf

This is the interface that QEMU emulates. It has been reported that
Windows 2016 Server and 2019 Server guests do not recognize QEMU's
emulated NVDIMM devices using the Microsoft driver.

I'd like to understand the path forward that will allow both Linux and
Windows guests to successfully use QEMU's emulated NVDIMM device
(https://gitlab.com/qemu-project/qemu/-/blob/master/hw/acpi/nvdimm.c).

Are/have these two interfaces being/been unified?

Should QEMU emulate both of them to make running Windows guests easy?

Thanks,
Stefan

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