Comment 1 for bug 351845

Hmm...it looks like there's some code for ejecting CDs starting as early as 19cb3738 or so (although the code was substantially changed later on). That was included in v0.9.0, which our qemu-dm was branched from.

There's a documentation update in that commit that specifically refers a lot to directly passing through /dev/cdrom (or equivalent), so there may be more going on there, but this certainly seems like something that qemu has thought about.