On 19/12/18 09:50, Peter Xu wrote: > Starting from QEMU 4.0, let's specify "split" as the default value for > kernel-irqchip. > > So for QEMU>=4.0 we'll have: allowed=Y,required=N,split=Y > for QEMU<=3.1 we'll have: allowed=Y,required=N,split=N > (omitting all the "kernel_irqchip_" prefix) > > Note that this "split" is optional - we'll first try to enable split > kernel irqchip, and we'll fall back to complete kernel irqchip if we > found that the kernel capability is missing.
Please just fail completely and require a new kernel for the 4.0 machine type. There are subtle differences between kernel and QEMU irqchip, I don't think we want to open that can of worms. Paolo
