The Register has this to say:
https:
//www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/
If I read correctly AMD processors do not have this issue.
AMD processors are not subject to the types of attacks that the kernel page table isolation feature protects against. The AMD microarchitecture does not allow memory references, including speculative references, that access higher privileged data when running in a lesser privileged mode when that access would result in a page fault."
https:
//www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/