Re: [HMM v13 07/18] mm/ZONE_DEVICE/x86: add support for un-addressable device memory

[Balbir Singh]

On 19/11/16 05:18, JÃrÃme Glisse wrote:
> It does not need much, just skip populating kernel linear mapping
> for range of un-addressable device memory (it is pick so that there
> is no physical memory resource overlapping it). All the logic is in
> share mm code.
> 
> Only support x86-64 as this feature doesn't make much sense with
> constrained virtual address space of 32bits architecture.
> 

Is there a reason this would not work on powerpc64 for example?
Could you document the limitations -- testing/APIs/missing features?

Balbir Singh.