Re: [libvirt] ARM KVM GICv3 Support

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?