In the context of [1] the 1st patch will be of interest, whereas the other changes are a result of observations while doing that conversion.
1: convert vendor hook invocations to altcall 2: invoke <vendor>_vpmu_initialise() through a hook as well 3: move vpmu_ops to .init.data Jan [1] https://lists.xen.org/archives/html/xen-devel/2021-11/msg01822.html
