domain: Use KEEP_TPM flag for domain rename

If the VM has implicit TPM state, use the VIR_DOMAIN_UNDEFINE_KEEP_TPM
flag to preserve that state when renaming the VM (if libvirt is new
enough).

The state is stored based on VM UUID and nothing else, and the UUID
is preserved during rename, so we don't need to do any of the same
trickery that's required for nvram duplication.

Signed-off-by: Cole Robinson <crobinso@redhat.com>

tests/uitests/data/live/uitests-firmware-efi.xml

@@ -10,5 +10,10 @@
   <features>
     <acpi/>
   </features>
+  <devices>
+    <tpm model='tpm-crb'>
+      <backend type='emulator' version='2.0'/>
+    </tpm>
+  </devices>
 </domain>
 

virtManager/object/domain.py

@@ -436,6 +436,10 @@ class vmmDomain(vmmLibvirtObject):
         return bool(self.get_xmlobj().is_uefi() or
                     self.get_xmlobj().os.nvram)
 
+    def has_tpm_state(self):
+        return any(tpm.type == "emulator"
+                   for tpm in self.get_xmlobj().devices.tpm)
+
     def is_persistent(self):
         return bool(self._backend.isPersistent())
 
@@ -1414,6 +1418,9 @@ class vmmDomain(vmmLibvirtObject):
         else:
             if self.has_nvram():
                 flags |= getattr(libvirt, "VIR_DOMAIN_UNDEFINE_KEEP_NVRAM", 0)
+            if (self.has_tpm_state() and
+                self.conn.support.domain_undefine_keep_tpm()):
+                flags |= getattr(libvirt, "VIR_DOMAIN_UNDEFINE_KEEP_TPM", 0)
         try:
             self._backend.undefineFlags(flags)
         except libvirt.libvirtError:

virtinst/support.py

@@ -296,6 +296,8 @@ class SupportCache:
     domain_state = _make(function="virDomain.state", run_args=())
     domain_open_graphics = _make(function="virDomain.openGraphicsFD",
         version="1.2.8", hv_version={"qemu": 0})
+    domain_undefine_keep_tpm = _make(
+            hv_libvirt_version={"qemu": "8.9.0"})
 
     # Pool checks
     pool_metadata_prealloc = _make(