Linux KVM Virtualization Had Mistakenly Been Applying L1TF Workaround To Unaffected CPUs Written by Michael Larabel in Virtualization on 19 May 2020 at 08:09 AM EDT. 17 Comments The all-important Linux Kernel-based Virtual Machine (KVM) code for open-source virtualization had mistakenly been applying its L1TF workaround for unaffected CPUs -- namely AMD EPYC CPUs -- for the past several months unt