[libvirt PATCHv2 1/2] qemu: add external backend for tpm

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Introduce a new backend type 'external' for connecting to a swtpm daemon
not managed by libvirtd.

Mostly in one commit, thanks to -Wswitch and the way we generate
capabilities.

https://bugzilla.redhat.com/show_bug.cgi?id=2063723

Signed-off-by: Ján Tomko <jtomko@xxxxxxxxxx>
---
 src/conf/domain_audit.c                       | 11 +++++
 src/conf/domain_conf.c                        | 35 ++++++++++++++++
 src/conf/domain_conf.h                        |  4 ++
 src/conf/domain_validate.c                    | 15 +++++++
 src/conf/schemas/domaincommon.rng             | 22 ++++++++++
 src/qemu/qemu_capabilities.c                  |  4 +-
 src/qemu/qemu_cgroup.c                        |  1 +
 src/qemu/qemu_command.c                       | 11 ++++-
 src/qemu/qemu_domain.c                        |  4 ++
 src/qemu/qemu_namespace.c                     |  1 +
 src/qemu/qemu_tpm.c                           |  2 +
 src/security/security_dac.c                   |  2 +
 src/security/security_selinux.c               |  2 +
 .../domaincapsdata/qemu_4.2.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_4.2.0-tcg.x86_64.xml  |  1 +
 tests/domaincapsdata/qemu_4.2.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_5.0.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_5.0.0-tcg.x86_64.xml  |  1 +
 .../qemu_5.0.0-virt.aarch64.xml               |  1 +
 tests/domaincapsdata/qemu_5.0.0.aarch64.xml   |  1 +
 tests/domaincapsdata/qemu_5.0.0.ppc64.xml     |  1 +
 tests/domaincapsdata/qemu_5.0.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_5.1.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_5.1.0-tcg.x86_64.xml  |  1 +
 tests/domaincapsdata/qemu_5.1.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_5.2.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_5.2.0-tcg.x86_64.xml  |  1 +
 .../qemu_5.2.0-virt.aarch64.xml               |  1 +
 tests/domaincapsdata/qemu_5.2.0.aarch64.xml   |  1 +
 tests/domaincapsdata/qemu_5.2.0.ppc64.xml     |  1 +
 tests/domaincapsdata/qemu_5.2.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_6.0.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_6.0.0-tcg.x86_64.xml  |  1 +
 .../qemu_6.0.0-virt.aarch64.xml               |  1 +
 tests/domaincapsdata/qemu_6.0.0.aarch64.xml   |  1 +
 tests/domaincapsdata/qemu_6.0.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_6.1.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_6.1.0-tcg.x86_64.xml  |  1 +
 tests/domaincapsdata/qemu_6.1.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_6.2.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_6.2.0-tcg.x86_64.xml  |  1 +
 .../qemu_6.2.0-virt.aarch64.xml               |  1 +
 tests/domaincapsdata/qemu_6.2.0.aarch64.xml   |  1 +
 tests/domaincapsdata/qemu_6.2.0.ppc64.xml     |  1 +
 tests/domaincapsdata/qemu_6.2.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_7.0.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_7.0.0-tcg.x86_64.xml  |  1 +
 .../qemu_7.0.0-virt.aarch64.xml               |  1 +
 tests/domaincapsdata/qemu_7.0.0.aarch64.xml   |  1 +
 tests/domaincapsdata/qemu_7.0.0.ppc64.xml     |  1 +
 tests/domaincapsdata/qemu_7.0.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_7.1.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_7.1.0-tcg.x86_64.xml  |  1 +
 tests/domaincapsdata/qemu_7.1.0.ppc64.xml     |  1 +
 tests/domaincapsdata/qemu_7.1.0.x86_64.xml    |  1 +
 .../domaincapsdata/qemu_7.2.0-q35.x86_64.xml  |  1 +
 .../domaincapsdata/qemu_7.2.0-tcg.x86_64.xml  |  1 +
 tests/domaincapsdata/qemu_7.2.0.x86_64.xml    |  1 +
 tests/qemuxml2argvdata/tpm-external.xml       | 40 +++++++++++++++++++
 .../tpm-external.x86_64-latest.xml            |  1 +
 tests/qemuxml2xmltest.c                       |  1 +
 61 files changed, 199 insertions(+), 2 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/tpm-external.xml
 create mode 120000 tests/qemuxml2xmloutdata/tpm-external.x86_64-latest.xml

diff --git a/src/conf/domain_audit.c b/src/conf/domain_audit.c
index 974df5a037..82cf6ab749 100644
--- a/src/conf/domain_audit.c
+++ b/src/conf/domain_audit.c
@@ -556,6 +556,17 @@ virDomainAuditTPM(virDomainObj *vm, virDomainTPMDef *tpm,
                   "virt=%s resrc=tpm-emulator reason=%s %s uuid=%s %s",
                   virt, reason, vmname, uuidstr, device);
         break;
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+        path = tpm->data.external.source->data.nix.path;
+        if (!(device = virAuditEncode("device", VIR_AUDIT_STR(path)))) {
+            VIR_WARN("OOM while encoding audit message");
+            goto cleanup;
+        }
+
+        VIR_AUDIT(VIR_AUDIT_RECORD_RESOURCE, success,
+                  "virt=%s resrc=tpm-external reason=%s %s uuid=%s %s",
+                  virt, reason, vmname, uuidstr, device);
+        break;
     case VIR_DOMAIN_TPM_TYPE_LAST:
     default:
         break;
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index a180398b14..c1e6732cde 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -1281,6 +1281,7 @@ VIR_ENUM_IMPL(virDomainTPMBackend,
               VIR_DOMAIN_TPM_TYPE_LAST,
               "passthrough",
               "emulator",
+              "external",
 );
 
 VIR_ENUM_IMPL(virDomainTPMVersion,
@@ -3309,6 +3310,9 @@ void virDomainTPMDefFree(virDomainTPMDef *def)
         g_free(def->data.emulator.logfile);
         virBitmapFree(def->data.emulator.activePcrBanks);
         break;
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+        virObjectUnref(def->data.external.source);
+        break;
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
@@ -10257,6 +10261,7 @@ virDomainTPMDefParseXML(virDomainXMLOption *xmlopt,
     g_autofree char *persistent_state = NULL;
     g_autofree xmlNodePtr *backends = NULL;
     g_autofree xmlNodePtr *nodes = NULL;
+    g_autofree char *type = NULL;
     int bank;
 
     if (!(def = virDomainTPMDefNew(xmlopt)))
@@ -10344,6 +10349,28 @@ virDomainTPMDefParseXML(virDomainXMLOption *xmlopt,
             virBitmapSetBitExpand(def->data.emulator.activePcrBanks, bank);
         }
         break;
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+        if (!(type = virXPathString("string(./backend/source/@type)", ctxt))) {
+            virReportError(VIR_ERR_XML_ERROR, "%s",
+                           _("missing external TPM backend type"));
+            goto error;
+        }
+
+        if (!(def->data.external.source = virDomainChrSourceDefNew(xmlopt)))
+            goto error;
+
+        def->data.external.source->type = virDomainChrTypeFromString(type);
+        if (def->data.external.source->type < 0) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                           _("unknown backend type '%s' for external TPM"),
+                           type);
+            goto error;
+        }
+
+        if (virDomainChrSourceDefParseXML(def->data.external.source, backends[0],
+                                          flags, NULL, ctxt) < 0)
+            goto error;
+        break;
     case VIR_DOMAIN_TPM_TYPE_LAST:
         goto error;
     }
@@ -20443,6 +20470,7 @@ virDomainTPMDefCheckABIStability(virDomainTPMDef *src,
         break;
 
     case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
@@ -24047,6 +24075,13 @@ virDomainTPMDefFormat(virBuffer *buf,
             virXMLFormatElement(&backendChildBuf, "active_pcr_banks", NULL, &activePcrBanksBuf);
         }
         break;
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+        if (def->data.external.source->type == VIR_DOMAIN_CHR_TYPE_UNIX) {
+            virBufferAddLit(&backendChildBuf, "<source type='unix' mode='connect'");
+            virBufferEscapeString(&backendChildBuf, " path='%s'/>\n",
+                                  def->data.external.source->data.nix.path);
+        }
+        break;
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index c19dfc5470..1404c55053 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1421,6 +1421,7 @@ typedef enum {
 typedef enum {
     VIR_DOMAIN_TPM_TYPE_PASSTHROUGH,
     VIR_DOMAIN_TPM_TYPE_EMULATOR,
+    VIR_DOMAIN_TPM_TYPE_EXTERNAL,
 
     VIR_DOMAIN_TPM_TYPE_LAST
 } virDomainTPMBackendType;
@@ -1464,6 +1465,9 @@ struct _virDomainTPMDef {
             bool persistent_state;
             virBitmap *activePcrBanks;
         } emulator;
+        struct {
+            virDomainChrSourceDef *source;
+        } external;
     } data;
 };
 
diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
index 95b8d9b419..8a9a79d7ea 100644
--- a/src/conf/domain_validate.c
+++ b/src/conf/domain_validate.c
@@ -2727,6 +2727,21 @@ virDomainTPMDevValidate(const virDomainTPMDef *tpm)
         break;
 
     case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
+        break;
+
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+        if (tpm->data.external.source->type != VIR_DOMAIN_CHR_TYPE_UNIX) {
+            virReportError(VIR_ERR_XML_ERROR, "%s", _("only source type 'unix' is supported for external TPM device"));
+            return -1;
+        }
+        if (tpm->data.external.source->data.nix.listen) {
+            virReportError(VIR_ERR_XML_ERROR, "%s", _("only 'client' mode is supported for external TPM device"));
+            return -1;
+        }
+        if (tpm->data.external.source->data.nix.path == NULL) {
+            virReportError(VIR_ERR_XML_ERROR, "%s", _("missing socket path for external TPM device"));
+            return -1;
+        }
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng
index 8bc627d114..c588a48fd2 100644
--- a/src/conf/schemas/domaincommon.rng
+++ b/src/conf/schemas/domaincommon.rng
@@ -5583,6 +5583,12 @@
             </attribute>
           </optional>
         </group>
+        <group>
+          <attribute name="type">
+            <value>external</value>
+          </attribute>
+          <ref name="tpm-external-source"/>
+        </group>
       </choice>
       <optional>
         <attribute name="version">
@@ -5607,6 +5613,22 @@
     </optional>
   </define>
 
+  <define name="tpm-external-source">
+    <optional>
+      <element name="source">
+        <attribute name="type">
+          <value>unix</value>
+        </attribute>
+        <attribute name="path">
+          <ref name="filePath"/>
+        </attribute>
+        <attribute name="mode">
+          <value>connect</value>
+        </attribute>
+      </element>
+    </optional>
+  </define>
+
   <define name="tpm-backend-emulator-encryption">
     <optional>
       <element name="encryption">
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 2553b5b3ad..3aba9299b1 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -6471,8 +6471,10 @@ virQEMUCapsFillDomainDeviceTPMCaps(virQEMUCaps *qemuCaps,
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_TPM_PASSTHROUGH))
         VIR_DOMAIN_CAPS_ENUM_SET(tpm->backendModel, VIR_DOMAIN_TPM_TYPE_PASSTHROUGH);
     if (virTPMHasSwtpm()) {
-        if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_TPM_EMULATOR))
+        if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_TPM_EMULATOR)) {
             VIR_DOMAIN_CAPS_ENUM_SET(tpm->backendModel, VIR_DOMAIN_TPM_TYPE_EMULATOR);
+            VIR_DOMAIN_CAPS_ENUM_SET(tpm->backendModel, VIR_DOMAIN_TPM_TYPE_EXTERNAL);
+        }
         if (virTPMSwtpmSetupCapsGet(VIR_TPM_SWTPM_SETUP_FEATURE_TPM_1_2)) {
             VIR_DOMAIN_CAPS_ENUM_SET(tpm->backendVersion, VIR_DOMAIN_TPM_VERSION_1_2);
             tpm->backendVersion.report = true;
diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index 78c4a035bf..9cf2d6474a 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -397,6 +397,7 @@ qemuSetupTPMCgroup(virDomainObj *vm,
     case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
         return qemuSetupChrSourceCgroup(vm, dev->data.passthrough.source);
     case VIR_DOMAIN_TPM_TYPE_EMULATOR:
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 42bd7cb99f..ee2e873b95 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -9241,7 +9241,10 @@ qemuBuildTPMBackendStr(virDomainTPMDef *tpm,
 {
     g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
 
-    virBufferAsprintf(&buf, "%s", virDomainTPMBackendTypeToString(tpm->type));
+    if (tpm->type == VIR_DOMAIN_TPM_TYPE_EXTERNAL)
+        virBufferAddLit(&buf, "emulator");
+    else
+        virBufferAsprintf(&buf, "%s", virDomainTPMBackendTypeToString(tpm->type));
     virBufferAsprintf(&buf, ",id=tpm-%s", tpm->info.alias);
 
     switch (tpm->type) {
@@ -9253,6 +9256,7 @@ qemuBuildTPMBackendStr(virDomainTPMDef *tpm,
         virQEMUBuildBufferEscapeComma(&buf, qemuFDPassGetPath(passcancel));
         break;
     case VIR_DOMAIN_TPM_TYPE_EMULATOR:
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
         virBufferAddLit(&buf, ",chardev=chrtpm");
         break;
     case VIR_DOMAIN_TPM_TYPE_LAST:
@@ -9295,6 +9299,11 @@ qemuBuildTPMCommandLine(virCommand *cmd,
             return -1;
         break;
 
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+        if (qemuBuildChardevCommand(cmd, tpm->data.external.source, "chrtpm", priv->qemuCaps) < 0)
+            return -1;
+        break;
+
     case VIR_DOMAIN_TPM_TYPE_LAST:
         virReportEnumRangeError(virDomainTPMBackendType, tpm->type);
         return -1;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 8892f28fce..5c05032ce3 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1201,6 +1201,7 @@ qemuDomainTPMPrivateFormat(const virDomainTPMDef *tpm,
         break;
 
     case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
@@ -11753,6 +11754,9 @@ qemuDomainDeviceBackendChardevForeachOne(virDomainDeviceDef *dev,
         case VIR_DOMAIN_TPM_TYPE_EMULATOR:
             return cb(dev, dev->data.tpm->data.emulator.source, opaque);
 
+        case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
+            return cb(dev, dev->data.tpm->data.external.source, opaque);
+
         case VIR_DOMAIN_TPM_TYPE_LAST:
             return 0;
         }
diff --git a/src/qemu/qemu_namespace.c b/src/qemu/qemu_namespace.c
index 90c0b90024..0f7351ad46 100644
--- a/src/qemu/qemu_namespace.c
+++ b/src/qemu/qemu_namespace.c
@@ -457,6 +457,7 @@ qemuDomainSetupTPM(virDomainTPMDef *dev,
         break;
 
     case VIR_DOMAIN_TPM_TYPE_EMULATOR:
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         /* nada */
         break;
diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index 36d5beb202..f2edaf5eaa 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -1028,6 +1028,7 @@ qemuTPMHasSharedStorage(virDomainDef *def)
         case VIR_DOMAIN_TPM_TYPE_EMULATOR:
             return virFileIsSharedFS(tpm->data.emulator.storagepath) == 1;
         case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
+        case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
         case VIR_DOMAIN_TPM_TYPE_LAST:
             break;
         }
@@ -1048,6 +1049,7 @@ qemuTPMCanMigrateSharedStorage(virDomainDef *def)
         case VIR_DOMAIN_TPM_TYPE_EMULATOR:
             return QEMU_DOMAIN_TPM_PRIVATE(tpm)->swtpm.can_migrate_shared_storage;
         case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
+        case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
         case VIR_DOMAIN_TPM_TYPE_LAST:
             break;
         }
diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index 5ca63e30f4..917fcf76a3 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -1699,6 +1699,7 @@ virSecurityDACSetTPMFileLabel(virSecurityManager *mgr,
                                                   tpm->data.emulator.source,
                                                   false, false);
         break;
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
@@ -1722,6 +1723,7 @@ virSecurityDACRestoreTPMFileLabel(virSecurityManager *mgr,
         break;
     case VIR_DOMAIN_TPM_TYPE_EMULATOR:
         /* swtpm will have removed the Unix socket upon termination */
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index 415a26a386..93cc12407a 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -1660,6 +1660,7 @@ virSecuritySELinuxSetTPMFileLabel(virSecurityManager *mgr,
         if (rc < 0)
             return -1;
         break;
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
@@ -1695,6 +1696,7 @@ virSecuritySELinuxRestoreTPMFileLabelInt(virSecurityManager *mgr,
         break;
     case VIR_DOMAIN_TPM_TYPE_EMULATOR:
         /* swtpm will have removed the Unix socket upon termination */
+    case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
     case VIR_DOMAIN_TPM_TYPE_LAST:
         break;
     }
diff --git a/tests/domaincapsdata/qemu_4.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_4.2.0-q35.x86_64.xml
index 9375fc9457..d0bf0bdc7b 100644
--- a/tests/domaincapsdata/qemu_4.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_4.2.0-q35.x86_64.xml
@@ -211,6 +211,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_4.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_4.2.0-tcg.x86_64.xml
index 860ffd1047..6a3818fb4e 100644
--- a/tests/domaincapsdata/qemu_4.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_4.2.0-tcg.x86_64.xml
@@ -226,6 +226,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_4.2.0.x86_64.xml b/tests/domaincapsdata/qemu_4.2.0.x86_64.xml
index 0187584e6b..36a4081764 100644
--- a/tests/domaincapsdata/qemu_4.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_4.2.0.x86_64.xml
@@ -211,6 +211,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_5.0.0-q35.x86_64.xml
index 3f534b77a2..05884cdb86 100644
--- a/tests/domaincapsdata/qemu_5.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.0.0-q35.x86_64.xml
@@ -213,6 +213,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_5.0.0-tcg.x86_64.xml
index 2826ce58e1..c53b84c140 100644
--- a/tests/domaincapsdata/qemu_5.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.0.0-tcg.x86_64.xml
@@ -228,6 +228,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.0.0-virt.aarch64.xml b/tests/domaincapsdata/qemu_5.0.0-virt.aarch64.xml
index 1ae7dfdc01..e74a3d9f5f 100644
--- a/tests/domaincapsdata/qemu_5.0.0-virt.aarch64.xml
+++ b/tests/domaincapsdata/qemu_5.0.0-virt.aarch64.xml
@@ -172,6 +172,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.0.0.aarch64.xml b/tests/domaincapsdata/qemu_5.0.0.aarch64.xml
index 74db0a2561..605575c793 100644
--- a/tests/domaincapsdata/qemu_5.0.0.aarch64.xml
+++ b/tests/domaincapsdata/qemu_5.0.0.aarch64.xml
@@ -170,6 +170,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.0.0.ppc64.xml b/tests/domaincapsdata/qemu_5.0.0.ppc64.xml
index 804172d013..a5b718618b 100644
--- a/tests/domaincapsdata/qemu_5.0.0.ppc64.xml
+++ b/tests/domaincapsdata/qemu_5.0.0.ppc64.xml
@@ -137,6 +137,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.0.0.x86_64.xml b/tests/domaincapsdata/qemu_5.0.0.x86_64.xml
index a83e942ca5..fd1f42b555 100644
--- a/tests/domaincapsdata/qemu_5.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.0.0.x86_64.xml
@@ -213,6 +213,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_5.1.0-q35.x86_64.xml
index f10a106d9a..a04c3e7130 100644
--- a/tests/domaincapsdata/qemu_5.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.1.0-q35.x86_64.xml
@@ -214,6 +214,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_5.1.0-tcg.x86_64.xml
index a2a3b501cc..a7b2ff8d7d 100644
--- a/tests/domaincapsdata/qemu_5.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.1.0-tcg.x86_64.xml
@@ -228,6 +228,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.1.0.x86_64.xml b/tests/domaincapsdata/qemu_5.1.0.x86_64.xml
index 926ac6c231..45b7dcf6e4 100644
--- a/tests/domaincapsdata/qemu_5.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.1.0.x86_64.xml
@@ -214,6 +214,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml
index 31ff03f9f0..61cfa7d449 100644
--- a/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml
@@ -214,6 +214,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml
index fdaa0ae5bc..caced52187 100644
--- a/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml
@@ -228,6 +228,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.2.0-virt.aarch64.xml b/tests/domaincapsdata/qemu_5.2.0-virt.aarch64.xml
index 762fbe2f50..f19ad32693 100644
--- a/tests/domaincapsdata/qemu_5.2.0-virt.aarch64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0-virt.aarch64.xml
@@ -172,6 +172,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.2.0.aarch64.xml b/tests/domaincapsdata/qemu_5.2.0.aarch64.xml
index 74db0a2561..605575c793 100644
--- a/tests/domaincapsdata/qemu_5.2.0.aarch64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0.aarch64.xml
@@ -170,6 +170,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.2.0.ppc64.xml b/tests/domaincapsdata/qemu_5.2.0.ppc64.xml
index 02e038d445..8ae7487c1e 100644
--- a/tests/domaincapsdata/qemu_5.2.0.ppc64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0.ppc64.xml
@@ -137,6 +137,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_5.2.0.x86_64.xml b/tests/domaincapsdata/qemu_5.2.0.x86_64.xml
index cfd6ff1d84..67f8b0fd83 100644
--- a/tests/domaincapsdata/qemu_5.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0.x86_64.xml
@@ -214,6 +214,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml
index 048c47e9f6..08585e6cb0 100644
--- a/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml
@@ -215,6 +215,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml
index 75bf330a79..7536a42ad5 100644
--- a/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml
@@ -230,6 +230,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.0.0-virt.aarch64.xml b/tests/domaincapsdata/qemu_6.0.0-virt.aarch64.xml
index 30446b75f7..1235dd0ab7 100644
--- a/tests/domaincapsdata/qemu_6.0.0-virt.aarch64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0-virt.aarch64.xml
@@ -173,6 +173,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.0.0.aarch64.xml b/tests/domaincapsdata/qemu_6.0.0.aarch64.xml
index 6c30318d34..461e34f1d6 100644
--- a/tests/domaincapsdata/qemu_6.0.0.aarch64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0.aarch64.xml
@@ -171,6 +171,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.0.0.x86_64.xml b/tests/domaincapsdata/qemu_6.0.0.x86_64.xml
index 8b9e910fdc..632f7c21d1 100644
--- a/tests/domaincapsdata/qemu_6.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0.x86_64.xml
@@ -215,6 +215,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml
index bc4912bc62..35d1014626 100644
--- a/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml
@@ -216,6 +216,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml
index 6cbdb1d6ae..9d56f2dda7 100644
--- a/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml
@@ -230,6 +230,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.1.0.x86_64.xml b/tests/domaincapsdata/qemu_6.1.0.x86_64.xml
index 5efb7b595c..591ca12d72 100644
--- a/tests/domaincapsdata/qemu_6.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.1.0.x86_64.xml
@@ -216,6 +216,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml
index 1281dc5ff8..7558e78423 100644
--- a/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml
@@ -216,6 +216,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml
index 2fcff7a96f..c667b944da 100644
--- a/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml
@@ -232,6 +232,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.2.0-virt.aarch64.xml b/tests/domaincapsdata/qemu_6.2.0-virt.aarch64.xml
index 5aa8820612..2c9ba98a0a 100644
--- a/tests/domaincapsdata/qemu_6.2.0-virt.aarch64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0-virt.aarch64.xml
@@ -175,6 +175,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.2.0.aarch64.xml b/tests/domaincapsdata/qemu_6.2.0.aarch64.xml
index 96c426cd4f..9b546f59bc 100644
--- a/tests/domaincapsdata/qemu_6.2.0.aarch64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0.aarch64.xml
@@ -173,6 +173,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.2.0.ppc64.xml b/tests/domaincapsdata/qemu_6.2.0.ppc64.xml
index 350c55e2c0..fd7c9d8d5a 100644
--- a/tests/domaincapsdata/qemu_6.2.0.ppc64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0.ppc64.xml
@@ -135,6 +135,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_6.2.0.x86_64.xml b/tests/domaincapsdata/qemu_6.2.0.x86_64.xml
index ae789c3a9b..a20d3722fd 100644
--- a/tests/domaincapsdata/qemu_6.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0.x86_64.xml
@@ -216,6 +216,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>1.2</value>
diff --git a/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml
index 59b2988de0..ac9d384bb3 100644
--- a/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml
@@ -218,6 +218,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml
index 58d8bdee3f..2419875474 100644
--- a/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml
@@ -234,6 +234,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.0.0-virt.aarch64.xml b/tests/domaincapsdata/qemu_7.0.0-virt.aarch64.xml
index 4ec23a8b85..f4eb8a728b 100644
--- a/tests/domaincapsdata/qemu_7.0.0-virt.aarch64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0-virt.aarch64.xml
@@ -175,6 +175,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.0.0.aarch64.xml b/tests/domaincapsdata/qemu_7.0.0.aarch64.xml
index d3f90db5a8..053bec369b 100644
--- a/tests/domaincapsdata/qemu_7.0.0.aarch64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0.aarch64.xml
@@ -173,6 +173,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.0.0.ppc64.xml b/tests/domaincapsdata/qemu_7.0.0.ppc64.xml
index e9322a02e2..9c09174d77 100644
--- a/tests/domaincapsdata/qemu_7.0.0.ppc64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0.ppc64.xml
@@ -137,6 +137,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.0.0.x86_64.xml b/tests/domaincapsdata/qemu_7.0.0.x86_64.xml
index 368c359dcf..886e14ea49 100644
--- a/tests/domaincapsdata/qemu_7.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0.x86_64.xml
@@ -218,6 +218,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml
index 831ef667e9..6b5e8a6820 100644
--- a/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml
@@ -217,6 +217,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml
index e5d5768b40..e44804c21c 100644
--- a/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml
@@ -232,6 +232,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.1.0.ppc64.xml b/tests/domaincapsdata/qemu_7.1.0.ppc64.xml
index 73c2cb84e4..15cf6a9cf8 100644
--- a/tests/domaincapsdata/qemu_7.1.0.ppc64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0.ppc64.xml
@@ -130,6 +130,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.1.0.x86_64.xml b/tests/domaincapsdata/qemu_7.1.0.x86_64.xml
index 0e2aa77a7d..d4069dd6f0 100644
--- a/tests/domaincapsdata/qemu_7.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0.x86_64.xml
@@ -217,6 +217,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml
index 8c6399a7b6..e6997ccbc6 100644
--- a/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml
@@ -222,6 +222,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml
index b04beaa9d6..b9bf0b6a04 100644
--- a/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml
@@ -221,6 +221,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/domaincapsdata/qemu_7.2.0.x86_64.xml b/tests/domaincapsdata/qemu_7.2.0.x86_64.xml
index 86385dacbd..67ecdc0b12 100644
--- a/tests/domaincapsdata/qemu_7.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.2.0.x86_64.xml
@@ -222,6 +222,7 @@
       <enum name='backendModel'>
         <value>passthrough</value>
         <value>emulator</value>
+        <value>external</value>
       </enum>
       <enum name='backendVersion'>
         <value>2.0</value>
diff --git a/tests/qemuxml2argvdata/tpm-external.xml b/tests/qemuxml2argvdata/tpm-external.xml
new file mode 100644
index 0000000000..c8f9c72b1f
--- /dev/null
+++ b/tests/qemuxml2argvdata/tpm-external.xml
@@ -0,0 +1,40 @@
+<domain type='qemu'>
+  <name>TPM-VM</name>
+  <uuid>11d7cd22-da89-3094-6212-079a48a309a1</uuid>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>512288</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc-i440fx-2.12'>hvm</type>
+    <boot dev='hd'/>
+    <bootmenu enable='yes'/>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0' model='piix3-uhci'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <tpm model='tpm-tis'>
+      <backend type='external'>
+        <source type='unix' mode='connect' path='/tmp/path.sock'/>
+      </backend>
+    </tpm>
+    <audio id='1' type='none'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2xmloutdata/tpm-external.x86_64-latest.xml b/tests/qemuxml2xmloutdata/tpm-external.x86_64-latest.xml
new file mode 120000
index 0000000000..3ce73f0a84
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/tpm-external.x86_64-latest.xml
@@ -0,0 +1 @@
+../qemuxml2argvdata/tpm-external.xml
\ No newline at end of file
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index e13da8bd2c..0e729ca905 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -744,6 +744,7 @@ mymain(void)
     DO_TEST_CAPS_LATEST("tpm-emulator-tpm2-enc");
     DO_TEST_CAPS_LATEST("tpm-emulator-tpm2-pstate");
     DO_TEST_CAPS_ARCH_LATEST("aarch64-tpm", "aarch64");
+    DO_TEST_CAPS_LATEST("tpm-external");
 
     DO_TEST_NOCAPS("metadata");
     DO_TEST_NOCAPS("metadata-duplicate");
-- 
2.38.1




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