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From: Markus Armbruster <armbru@redhat.com>
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Date: Wed, 17 Oct 2018 07:57:39 +0200
In-Reply-To: <d8b9a6e6-c137-a553-8fe7-939edd2031b3@redhat.com> (Laine Stump's
	message of "Tue, 16 Oct 2018 15:12:40 -0400")
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Subject: [Qemu-devel] No more chameleon devices (was: [PATCH] virtio:
 Provide version-specific variants of virtio PCI devices)
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To: Laine Stump <laine@redhat.com>
Cc: "Daniel P. =?utf-8?Q?Berrang=C3=A9?=" <berrange@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Caio Carrara <ccarrara@redhat.com>, Fabian Deutsch <fdeutsch@redhat.com>, qemu-devel@nongnu.org, Wainer dos Santos Moschetta <wainersm@redhat.com>, Gonglei <arei.gonglei@huawei.com>, Gerd Hoffmann <kraxel@redhat.com>, Andrea Bolognani <abologna@redhat.com>, Cleber Rosa <crosa@redhat.com>, Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= <philmd@redhat.com>

Laine Stump <laine@redhat.com> writes:

[...]
> In the end, having a device that changed PCI ID depending on what kind
> of slot it was plugged into was an idea "too clever for its own good",
> should be avoided when new devices are added in the future, and we
> should at least provide an alternative that doesn't do that for existing
> devices.

That means for each chameleon PCI/PCIe device:

* create a pair of devices that can only go into one kind of slot

* deprecate the chameleon

Yes, please!  Volunteers?

Do we have similar chameleons outside PCI?

[...]