Compared to previous kernel, IBRS/IBPB are not exposed anymore for use by KVM (MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD). VM running on the previous kernel (with a profile mandating spec-ctrl) won't be able to start anymore.
Compared to previous kernel, IBRS/IBPB are not exposed anymore for use by KVM (MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD). VM running on the previous kernel (with a profile mandating spec-ctrl) won't be able to start anymore.