Re: [PATCH 0/2] KVM: MMU: support VMAs that got remap_pfn_range-ed

[Xiao Guangrong]

On 07/04/2016 03:38 PM, Paolo Bonzini wrote:
> On 04/07/2016 08:39, Xiao Guangrong wrote:
> > Why the memory mapped by this mmap() is not a portion of MMIO from
> > underlayer physical device? If it is a valid system memory, is this
> > interface
> > really needed to implemented in vfio? (you at least need to set VM_MIXEDMAP
> > if it mixed system memory with MMIO)
>
> The KVM code does not care if VM_MIXEDMAP is set or not, it works in
> either case.

Yes, it is. I mean nvdia's vfio patchset should use VM_MIXEDMAP if the memory
is mixed. :)