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Re: [Xen-devel] No P2M mapping == pagetype == XEN_DOMCTL_PFINFO_XTAB?
| To: | Mike Sun <msun@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] No P2M mapping == pagetype == XEN_DOMCTL_PFINFO_XTAB? |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 29 Sep 2008 18:53:35 +0100 |
| Cc: | |
| Delivery-date: | Mon, 29 Sep 2008 10:53:54 -0700 |
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| Thread-topic: | [Xen-devel] No P2M mapping == pagetype == XEN_DOMCTL_PFINFO_XTAB? |
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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 > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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