[libvirt] ARM KVM GICv3 Support

[Peter Maydell]

On 15 December 2015 at 16:57, Andre Przywara <andre.przywara at arm.com> wrote:
> Even that wouldn't help us, I guess, as you cannot easily check for
> GICv3/GICv2 compatibility with a _script_. Having access to ioctl's make
> this pretty easy though: Just try to call KVM_CREATE_DEVICE with the
> proper type and get -ENODEV if this one is not supported. This can be
> done without any extra userland tool by just executing some ioctls on
> /dev/kvm (from C or using some helper library).

kvm-ok already runs a few external helper binaries for some
things. (Also you can do ioctls from a script if it's a perl
script ;-))

As you say the actual technical details of how to query for
the host's current supported functionality are straightforward,
so it's just a question of how libvirt is expecting that to be
exposed to it.

thanks
-- PMM