Re: [Qemu-devel] [PATCH v6 2/7] hw/misc: add vmcoreinfo device

[Daniel P. Berrange]

On Mon, Sep 11, 2017 at 06:59:24PM +0200, Marc-André Lureau wrote:
> See docs/specs/vmcoreinfo.txt for details.
> 
> "etc/vmcoreinfo" fw_cfg entry is added when using "-device vmcoreinfo".

I'm wondering if you considered just adding the entry to fw_cfg by
default, without requiring any -device arg ? Unless I'm misunderstanding,
this doesn't feel like a device to me - its just a well known bucket
in fw_cfg IIUC ?  Obviously its existance would need to be tied to
the latest machine type for ABI reasons though. The benefit of this
is that it would "just work" without us having to plumb it through to
all the downstream applications that use QEMU for mgmt guest (OpenStack,
oVirt, GNOME Boxes, virt-manager, and countless other mgmt apps).

Regards,
Daniel
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