CNV-57530: Added notes about unsupported snapshots

Author: jhradilek

virt/virtual_machines/creating_vms_custom/virt-cloning-vms.adoc

@@ -8,6 +8,11 @@ toc::[]
 
 You can clone virtual machines (VMs) or create new VMs from snapshots.
 
+[IMPORTANT]
+====
+Cloning of a VM with a vTPM device attached to it is not supported.
+====
+
 include::modules/virt-cloning-vm-web.adoc[leveloffset=+1]
 
 include::modules/virt-creating-vm-from-snapshot-web.adoc[leveloffset=+1]
@@ -16,4 +21,4 @@ include::modules/virt-creating-vm-from-snapshot-web.adoc[leveloffset=+1]
 [id="additional-resources_{context}"]
 == Additional resources
 
-* xref:../../../virt/virtual_machines/creating_vms_custom/virt-creating-vms-by-cloning-pvcs.adoc#virt-creating-vms-by-cloning-pvcs[Creating VMs by cloning PVCs]
+* xref:../../../virt/virtual_machines/creating_vms_custom/virt-creating-vms-by-cloning-pvcs.adoc#virt-creating-vms-by-cloning-pvcs[Creating VMs by cloning PVCs]

virt/virtual_machines/virt-using-vtpm-devices.adoc

@@ -10,5 +10,10 @@ Add a virtual Trusted Platform Module (vTPM) device to a new or existing virtual
 machine by editing the `VirtualMachine` (VM) or `VirtualMachineInstance` (VMI)
 manifest.
 
+[IMPORTANT]
+====
+Cloning or creating snapshots of virtual machines (VMs) with a vTPM device is not supported. Support for creating snapshots of VMs with vTPM devices is added in {VirtProductName} 4.18.
+====
+
 include::modules/virt-about-vtpm-devices.adoc[leveloffset=+1]
 include::modules/virt-adding-vtpm-to-vm.adoc[leveloffset=+1]