[OpenBIOS] Re: [PATCH v7] arch/ppc/qemu: Add a node for the empty first PCI bus to the device tree

[Mark Cave-Ayland]

On 02/10/2021 20:00, Mark Cave-Ayland wrote:
> IIRC the last time you posted the patch my comment was that I would be happy to take 
> the patch as-is, as long as the extra PCI bus is added to the QEMU mac99 machine 
> beforehand. Device trees shouldn't be advertising devices that don't exist within the 
> machine, since the existence of a device node will indicate that guest OSs should try 
> to probe for it and the behaviour when the device doesn't exist is undefined.

And also while I remember: this is assuming that the bus numbers are correct 
according to a reference device tree (I can't remember the exact outcome of the 
discussion as to whether each bus number is unique beneath the host bridge or 
throughout the entire device tree).

ATB,

Mark.