On 19/10/2017 17:39, Michael S. Tsirkin wrote: >> Add VHOST_USER_GET_CONFIG/VHOST_USER_SET_CONFIG messages which can be >> used for live migration of vhost user devices, also vhost user devices >> can benefit from the messages to get/set virtio config space from/to the >> I/O target. For the purpose to support virtio config space change, >> VHOST_USER_SET_CONFIG_FD message is added as the event notifier >> in case virtio config space change in the I/O target. >> >> Signed-off-by: Changpeng Liu <changpeng....@intel.com> > I don't much like it that config is getting passed through. > > IMO this makes managing things harder not easier. > > How about specific messages about specific parts of > config space that you want to get from the backend?
In the case of virtio-blk that would be all of it. Do you have a case in mind where some part of the configuration space is owned by QEMU? Paolo
