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

From: Andrea Bolognani
Subject: Re: [Qemu-devel] [PATCH v2 3/3] arm: implement query-gic-capability
Date: Thu, 03 Mar 2016 13:19:47 +0100

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
> 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 <address@hidden>
> ---
>  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?


Andrea Bolognani
Software Engineer - Virtualization Team

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