Re: [Xen-devel] [RFC XEN PATCH v4 00/41] Add vNVDIMM support to HVM domains

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Tue, Feb 13, 2018 at 03:06:24AM -0700, Jan Beulich wrote:
> >>> On 12.02.18 at 11:05, <roger.pau@xxxxxxxxxx> wrote:
> > If you map the NVDIMM as MMIO to Dom0 you don't need the M2P entries
> > IIRC, and if it's mapped using 1GB pages it shouldn't use that much
> > memory for the page tables (ie: you could just use normal RAM for the
> > page tables that map the NVDIMM IMO). Of course that only applies to
> > PVH/HVM.
> 
> But in order to use (part of) it in a RAM-like manner we need struct
> page_info for it.

I guess the main use of this would be to grant NVDIMM pages? And
without a page_info that's not possible.

Roger.

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