On Mon, 2015-03-02 at 13:44 +0000, Andrew Cooper wrote: > On 02/03/15 13:15, Jan Beulich wrote: > >>>> On 02.03.15 at 13:59, <"jgr...@suse.com".non-mime.internet> wrote: > >> In order to indicate the Xen tools capability to support the virtual > >> mapped linear p2m list instead the 3 level mfn tree add feature flags > >> to the shared_info page. > > But why in the shared info page? They'd belong to start info or should > > be obtainable via XENVER_get_features. > > Furthermore in this case, the virtual linear p2m is purely a > guest->toolstack feature/ABI. > > Xen deliberately has no knowledge of PV guest p2ms of either the 3level > or linear variety. > > Is there genuinely no better interface than the hypervisor feature flags > to indicate a piece of toolstack support?
Per docs/misc/xenstore-paths.markdown there are platform-feature flags in ~/control/ (multiproc suspend and xs_reset support) but that might be available to the guest too late for this use case? Ian. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
