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    SubjectRe: [PATCH] PCI: remove pcibios_scan_all_fns()
    On Tue, 2009-06-23 at 15:53 -0700, Jeremy Fitzhardinge wrote:
    > On 06/23/09 15:41, Benjamin Herrenschmidt wrote:
    > >> Do you have any other cases in mind where it would be helpful?
    > >>
    > >
    > > Well, it might be for virtual device discovery etc... but don't bother
    > > now. We might talk about it at KS for those interested. It's more
    > > something we see as useful for embedded archs at the moment but in the
    > > long run it might make sense for hypervisors as well.
    > >
    > Perhaps. We have Xenbus - which is a little bit like OF in that it has
    > data in a hierarchical namespace - and I guess it might be possible to
    > find a mapping onto some generic OF-like interface.

    Which is sort-of what we did. IE. We disconnected the device-tree itself
    from the underlying firmware, using the device-tree and OF-style
    bindings (in some case simplified) as a basis for representing devices
    but without the need for an actual open firmware underneath.

    > However, Xenbus is an active communication channel between virtual machines
    > rather than a
    > static representation of a machine configuration (for example, you can
    > put a watch on a particular path to get a notification of when someone
    > else changes it).

    On ppc64 too, the HV can feed us with new tree nodes or remove some, it
    doesn't have to be static. Though we mostly use it as a static tree on

    > But, yes, this is a good KS hallway track subject.


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