Re: [Qemu-devel] [PATCH v2 3/3] arm: implement query-gic-capability

[Andrea Bolognani <abologna@redhat.com>]

On Thu, 2016-03-03 at 16:21 +0800, Peter Xu wrote:
> For emulated ARM VM, only gicv2 is supported. We need to add gicv3
in
> when emulated gicv3 ready. For KVM accelerated ARM VM, we detect the
> capability bits using ioctls.
> 
> if we want to
know GIC kernel capabilities, we need to make sure we have
> enabled KVM when querying (like, with "-enable-kvm").
> 
>
Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  target-arm/machine.c | 48
+++++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 47 insertions(+), 1 deletion(-)

Sorry for not catching this earlier, but I'm afraid this is not
going to work -- libvirt doesn't pass either -enable-kvm or the
machine option accel=kvm when probing for capabilities, which
means that, with the current implementation, it will only get
information about emulated GIC.

Is there a way to make probing work without requiring KVM to
be enabled?

Cheers.

-- 
Andrea Bolognani
Software Engineer - Virtualization Team