Alex Bligh <alex@alex.org.uk> writes:
On 22 Sep 2014, at 16:45, Andreas Färber <afaerber@suse.de> wrote:
What about adding a bool property "qemu-kvm-compat" to the MachineClass? Then a qemu-kvm shell script (like SUSE uses) can pass -global machine.qemu-kvm-compat=on whereas qemu-system-x86_64 would run in the
No need to mess with -global, just use -machine qemu-kvm-compat=off. You can have multiple -machine, and the last key=value wins.
default non-qemu-kvm mode (config on disk would affect both). It would also allow running -machine pc-0.15,qemu-kvm-compat=on, ditching lots of new machine names and avoiding the name bikeshedding.
I'd be happy with that. Presumably downstream can then patch things so qemu-kvm-compat defaults in the way they want (if we don't like the configure option).
However, that's not compatible with using PC_COMPAT as far as I know (unless there is some cunning way you can make a machine parameter change compat_props things).
Monkey-patching MACHINE_GET_CLASS(machine)->compat_props? Gross, but I don't have better ideas to offer.