Oracle Linux support for Oracle Linux running with the Red Hat compatible kernel is available for all hardware systems considered certified or compatible for the corresponding release (e.g. Oracle Linux 7 Update 3 corresponds with Red Hat Enterprise Linux 7 Update 3) of Red Hat Enterprise Linux according to the Red Hat hardware catalog:
https://access.redhat.com/ecosystem
Oracle recommends the Unbreakable Enterprise Kernel for Oracle Linux starting with Oracle Linux 5 Update 5. Please refer to this list of Oracle Linux and Oracle VM certified hardware to see which systems are certified with Oracle Linux when running the Unbreakable Enterprise Kernel.
Please refer to this list of Oracle Linux and Oracle VM certified hardware to see which systems are certified to run with Oracle VM 3.