On Fri, Jun 05, 2020 at 05:01:07PM -0300, Thiago Jung Bauermann wrote: > > Paolo Bonzini <pbonzini@xxxxxxxxxx> writes: > > > On 05/06/20 01:30, Thiago Jung Bauermann wrote: > >> Paolo Bonzini <pbonzini@xxxxxxxxxx> writes: > >>> On 04/06/20 23:54, Thiago Jung Bauermann wrote: > >>>> QEMU could always create a PEF object, and if the command line defines > >>>> one, it will correspond to it. And if the command line doesn't define one, > >>>> then it would also work because the PEF object is already there. > >>> > >>> How would you start a non-protected VM? > >>> Currently it's the "-machine" > >>> property that decides that, and the argument requires an id > >>> corresponding to "-object". > >> > >> If there's only one object, there's no need to specify its id. > > > > This answers my question. However, the property is defined for all > > machines (it's in the "machine" class), so if it takes the id for one > > machine it does so for all of them. > > I don't understand much about QEMU internals, so perhaps it's not > practical to implement but from an end-user perspective I think this > logic can apply to all architectures (since my understanding is that all > of them use only one object): make the id optional. If it's not > specified, then there must be only one object, and the property will > implicitly refer to it. > > Then, if an architecture doesn't need to specify parameters at object > creation time, it can be implicitly created and the user doesn't have to > worry about this detail. Seems overly complicated to me. We could just have it always take an ID, but for platforms with no extra configuration make the pre-fabricated object available under a well-known name. That's essentially the same as the way you can add a device to the "pci.0" bus without having to instantiate and name that bus yourself. -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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