[Libvir] [RFC] Host and guest capabilities

I've been looking into the parts of virtinst which try to probe the capabilities of the host directly, rather than being abstracted through libvirt (for example, opening and parsing /sys/hypervisor/properties/capabilities directly). Attached is a proposed API for probing the capabilities and supported guest architectures of the hypervisor / driver. I've implemented the virCapabilities part already. My original implementation of the guest architectures had virCapabilities containing a list of supported architectures, but that doesn't nearly cover the richness of what the underlying drivers could support, so I'm currently separating that out into a separate virConnectGetGuestArchitectures call. Let me know your opinions of this API. As an aside, the current virt-manager "choose paravirt / fullvirt" screen doesn't really capture the full, shall I say, ugliness of the possible choices for architecture, particularly when we add qemu, kqemu, and emulation in the mix. I suspect that presenting a list of architectures here, perhaps with some options to show only paravirt, show only fullvirt, show only accelerated ... Rich. -- Emerging Technologies, Red Hat http://et.redhat.com/~rjones/ 64 Baker Street, London, W1U 7DF Mobile: +44 7866 314 421 "[Negative numbers] darken the very whole doctrines of the equations and make dark of the things which are in their nature excessively obvious and simple" (Francis Maseres FRS, mathematician, 1759)