linux-raspi2-tools-4.15.0-1012 4.15.0-1012.13 (armhf binary) in ubuntu cosmic

 This package provides the architecture dependant parts for kernel
 version locked tools (such as perf and x86_energy_perf_policy) for
 version 4.15.0-1012 on
 ARM (hard float).
 You probabaly want to install the linux-tools-<flavour> meta package.