At 11:44 +0200 on 22 Jun (1434973458), Vitaly Kuznetsov wrote: > Tim Deegan <t...@xen.org> writes: > > > At 15:35 +0200 on 03 Jun (1433345722), Vitaly Kuznetsov wrote: > >> x86-specific hook cleans up the pirq-emuirq mappings and replaces the > >> shared_info frame with an empty page to support subsequent > >> XENMAPSPACE_shared_info call. > > > > That's a bit roundabout. I think we might be better off allocating a > > new shared-info page and abandoning the old one as an ordinary guest > > RAM page. > > > > I've tried looking into such approach and there is an issue: shared_info > page is being allocated from Xen heap and in case it's built with > CONFIG_SEPARATE_XENHEAP we can't just reassign the page to the domain's > pagelist or we'll open a possibility for a domain to move itself > entirely to Xen's heap by e.g looping over all its gfns, doing > XENMAPSPACE_shared_info and perforting soft reset.
Ah, true. So your approach of replacing it is better. Cheers, Tim. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
