virtio: improve virtqueue mapping error messages
Improve error reporting when virtqueue ring mapping fails by including a
device identifier in the error message.
Introduce a helper qdev_get_printable_name() in qdev-core, which returns
either:
- the device ID, if explicitly provided (e.g. -device ...,id=foo)
- the QOM path from qdev_get_dev_path(dev) otherwise
- "<unknown device>" as a fallback when no identifier is present
This makes it easier to identify which device triggered the error in
multi-device setups or when debugging complex guest configurations.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/230
Buglink: https://bugs.launchpad.net/qemu/+bug/1919021
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Alessandro Ratti <alessandro@0x65c.net>
Message-Id: <20250924093138.559872-2-alessandro@0x65c.net>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
3 files changed
