Starting a VM fails with error "Host CPU does not provide required features: lwp"

Solution Verified - Updated -

Issue

  • Trying to start a VM fails with error: "Host CPU does not provide required features: lwp"
# virsh start testvm
error: Failed to start domain testvm
error: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: lwp

Environment

  • AMD Opteron 6xxx
  • Red Hat Enterprise Linux 6.10
  • microcode_ctl >= 1.17-32

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