Re: [Qemu-devel] [PATCH 2/3] ioh3420: Provide a unique bus name and an interrupt mapping function

[Markus Armbruster]

Paolo Bonzini <address@hidden> writes:

> Il 20/08/2014 15:03, Markus Armbruster ha scritto:
>>> >
>>> > This is for the root bus, I think it won't help Knut who's trying to
>>> > add devices behind root ports.
>> Read again, more slowly :)
>> 
>> Yes, I null the name of the root bus.  That makes the qdev machinery
>> derive the very same "pcie.0" name via rule 3 instead of rule 1, with
>> the side effect that future (non-root) PCIE buses get different names.
>> In particular, the next one named via rule 3 will be called "pcie.1"
>> instead of "pcie.0", making it actually accessible.
>
> I agree that this is a big improvement.

It's also an ABI break.  I'm not saying we can't do it, just that we
better consider it carefully.