On Fri, Jun 17, 2016 at 05:31:20PM +0100, Peter Maydell wrote: > On 17 June 2016 at 17:10, Richard W.M. Jones <rjo...@redhat.com> wrote: > > On Fri, Jun 17, 2016 at 03:49:38PM +0100, Peter Maydell wrote: > >> > I agree that we really need to do better here (thinking about > >> > the problem is on my todo list but generally other more pressing > >> > issues intervene). I'd welcome suggestions for semantics which > >> > (a) do what you want (b) are reasonably in line with what we do > >> > on other host architectures (c) don't break existing command lines. > >> > (I think those are the main requirements.) > >> > >> ...so does anybody have any concrete suggestions? We could fix > >> this for 2.7 but we're starting to run low on time for that. > > > > I have changed libguestfs so it tries to guess if KVM will be used or > > not. We have to do this for the -cpu option too, but the guess is not > > too reliable. Only QEMU has the actual knowledge we need. > > > > https://github.com/libguestfs/libguestfs/commit/7023f20830a681ef36f8f99415fe41791555a3db > > > > Can we not have a "give me a GIC which will work" option, eg. > > > > -M virt,gic-version=besteffort,accel=kvm:tcg > > > > I don't care if it's not the fastest or most featureful. > > Do we also not care if the result is not consistent > between versions of QEMU? (eg if you go from 2.6 to > 2.7 does it have to stay doing the same thing it > always did?)
For libguestfs, no, since we don't do any migration or saving the state of the VM. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW
