On Tue, Oct 08, 2019 at 01:46:55PM -0300, Fabiano Rosas wrote:
This series adds support for the -machine,host-model= QEMU option for for pseries guests.
Pseries guests used to have a node (/proc/device-tree/host-model) in device-tree that exposed the host's model string so that guest userspace tools could determine the host machine they were running on.
QEMU used to provide the node by default, but this has been disabled due to security concerns. There is now a machine option (host-model) that allows the user to set an arbitrary string to be used as the host model.
Userspace tools will then be broken unless the user explicitly edits the domain XML with the desired host model to be exposed to the guest. However, having an arbitrary string in the domain XML that needs to be the same for every guest in that machine but different across host machines would generate issues with XML portability and more importantly, migration.
What userspace tool is broken, and in what way ? Re-introducing the host passthrough to satisfy a broken tool is not very attractive because it reintroduces the security flaw that the QEMU change was fixing. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|