Re: ARM KVM GICv3 Support

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On Tue, Dec 15, 2015 at 10:36:32AM +0100, Martin Kletzander wrote:
> On Mon, Dec 14, 2015 at 10:47:26AM -0600, Andrew Jones wrote:
> >On Mon, Dec 14, 2015 at 12:31:59PM +0100, Christoffer Dall wrote:
> >>Hi all,
> >>
> >>I'm trying to figure out what the correct solution for libvirt support
> >>for ARM KVM guests with GICv3 is.
> >>
> >>The challenge is that QEMU's virt machine model defaults to GICv2 unless
> >>you specify an additional "-machine gic-version=host" parameter to QEMU,
> >>in which case your VM gets the same GIC version as your host.
> >>
> >>Now, I'm told that this is inconvenient for libvirt, because it
> >>typically does not pass any -machine options, is that correct?
> >
> 
> We do pass some options, for example, you can restrict the GIC to v2:
> https://libvirt.org/formatdomain.html#elementsFeatures
> 
> That could be modified to work for your purpose IIUC, right?
> 
How do I figure out which values the version can take (v2, v3, host?)
and which QEMU cmdline that translates into?

(sorry for my libvirt n00b-ness here.)

Thanks,
-Christoffer

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