On 8/19/2023 3:26 AM, Greg KH wrote: > > My "strong" opinion is the one kernel development rule that we have, > "you can not break userspace". So, if you change these > values/structures/whatever in the future, and userspace tools break, > that's not ok and the changes have to be reverted. > > If you can control both sides of the API here (with open tools that you > can guarantee everyone will always update to), then yes, you can change > the api in the future. > This is true for us - we contribute and maintain support for this driver in Cloud Hypervisor[1], an open source VMM. We also do a check of the hypervisor version when the driver loads, and refuse to proceed if it is running on an incompatible hypervisor. Thanks, Nuno Das Neves [1] https://github.com/cloud-hypervisor/cloud-hypervisor
