Re: [Qemu-devel] [PATCH] Do not emulate a floppy drive when -nodefaults

[Markus Armbruster]

Paolo Bonzini <address@hidden> writes:

> On 14/05/2015 14:02, Markus Armbruster wrote:
>>   It should certainly be off for pc-q35-2.4 and newer.  Real Q35 boards
>>   commonly don't have an FDC (depends on the Super I/O chip used).
>> 
>>   We may want to keep it off for pc-i440fx-2.4 and newer.  I doubt
>>   there's a real i440FX without an FDC, but our virtual i440FX is quite
>>   unlike a real one in other ways already.
>
> That would break libvirt for people upgrading from 2.3 to 2.4.  So it's
> more like pc-i440fx-3.0 and pc-q35-3.0.

What exactly breaks when?

>                                          Unless for q35 we decide to
> break everything and retroactively nuke the controller.
>
> (I'm still not sure why we have backwards-compatible machine types for q35).

Beats me :)

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