Re: [Qemu-devel] Questions about vNVDIMM on qemu/KVM

[Yasunori Goto]

> >
> > But ,I would like understand one more thing.
> > In the following mail, it seems that e820 bus will be used for fake DAX.
> >
> > https://lists.01.org/pipermail/linux-nvdimm/2018-January/013926.html
> >
> > Could you tell me what is relationship between "fake DAX" in this mail
> > and Guest DAX?
> > Why e820 is necessary for this case?
> >
> 
> It was proposed as a starting template for writing a new nvdimm bus
> driver. All we need is a way to communicate both the address range and
> the flush interface. This could be done with a new SPA Range GUID with
> the NFIT, or a custom virtio-pci device that registers a special
> nvdimm region with this property. My preference is whichever approach
> minimizes the code duplication, because the pmem driver should be
> re-used as much as possible.

Ok, I see.
Thank you very much for your explanation.

Bye,
---
Yasunori Goto