Re: [Xen-devel] No P2M mapping == pagetype == XEN_DOMCTL_PFINFO_XTAB?

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

If the top nibble is set (i.e, XEN_..._XTAB) then indeed there is no memory
page at that pseudophysical address. It could become populated later (by
XENMEM_populate_physmap for example).

 -- Keir

On 29/9/08 18:35, "Mike Sun" <msun@xxxxxxxxxx> wrote:

> For an HVM domain, if a given pfn has a pagetype of
> XEN_DOMCTL_PFINFO_XTAB as returned by xc_map_foreign_batch(), does
> this mean that pfn is not not in the HVM guest's pseudo-physical
> map/have a valid P2M entry?
> 
> I'm having difficulty understanding page types for HVM domains.  If a
> pfn for an HVM domain is of the type XEN_DOMCTL_PFINFO_XTAB, can it
> later become a valid page?  And what about the reverse case?
> 
> Any help would be much appreciated, thanks,
> Mike
> 
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