Peter Xu <pet...@redhat.com> writes: > On Wed, Mar 23, 2016 at 01:21:52PM +0100, Markus Armbruster wrote: >> Can you tell me what a management application is supposed to do with the >> information returned by query-gic-capabilities? Not just in general >> terms, like "using this information, libvirt can warn the user during >> configuration of guests when specified GIC device type is not supported, >> but specifics. Something like "-frobnicate mutter=mumble won't work >> unless query-gic-capabilities reports emulated version 2 is supported" >> for every piece of configuration that should be vetted against >> query-gic-capabilities. > > I suppose that won't be a very big problem since possibly only > libvirt will use it... I agree that it's better to explain it more > clearly though. How about adding these lines into patch 1 commit > message: > > """ > For example, if we got the query result: > > {"return": {"capabilities": > [ {"emulated": false, "version": 3, "kernel": true}, > {"emulated": true, "version": 2, "kernel": false} ] } } > > Then it means that we support emulated GIC version 2 using: > > qemu-system-aarch64 -M virt,gic-version=2 ... > > or kvm-accelerated GIC version 3 using: > > qemu-system-aarch64 -enable-kvm -M virt,gic-version=3 ...
I'd say "qemu-system-aarch64 -M virt,accel=kvm,gic=version=3" > If we specify other explicit GIC version rather than the above, QEMU > will not be able to boot. > """ Works for me.