Paul Brook <paul@xxxxxxxxxxxxxxxx> writes:
>> > IMO the no_user flag is a bug, and should not exist.
>>
>> Sorry, what's that?
>
> Usually an indication that a device has been incorrectly or inproperly
> converted to the qdev interface.
Can also be an indication that the device can't support multiple
instances. For instance:
commit 39a51dfda835a75c0ebbfd92705b96e4de77f795
Author: Markus Armbruster <armbru@xxxxxxxxxx>
Date: Tue Oct 27 13:52:13 2009 +0100
qdev: Tag isa-fdc, PIIX3 IDE and PIIX4 IDE as no-user
These devices are created automatically, and attempting to create
another one with -device fails with "qemu: hardware error:
register_ioport_write: invalid opaque".
Signed-off-by: Markus Armbruster <armbru@xxxxxxxxxx>
Signed-off-by: Anthony Liguori <aliguori@xxxxxxxxxx>
With no-user, we at least fail with a decent error message.
I don't think it's fair to demand that a qdev conversion must relax
restrictions that haven't otherwise bothered us to be correct and
proper. We'll relax them if and when they bother us enough to make
somebody send a decent patch.
And yes, there are better ways to disallow multiple instances of a
device than declaring it no-user. Patches welcome.
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