Re: [Qemu-devel] [PATCH v11 5/5] hw/arm/virt: Add gic-version option to virt machine

[Pavel Fedin]

 Hello!

> In KVM case instead of assigning GICv2 as default, can we probe the KVM
> for GICv3 presence using KVM_CREATE_DEVICE_TEST and give priority to
> GICv3?

 We could, but i think this would hurt usability. I suggest that when the user 
chooses a
configuration, he/she expects to get something particular. And IMHO it's much 
better to default to
GICv2 (to be backwards-compatible), and just report error in case if this is 
not supported by KVM,
than to default to something, which is different on different machines and 
different kernels.
 Libvirt guys already blame "virt" machine for being too flexible...

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia