diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng
index 6b9b54298b..93a88d8830 100644
--- a/docs/schemas/nodedev.rng
+++ b/docs/schemas/nodedev.rng
@@ -143,8 +143,13 @@
           <value>virt_functions</value>
         </attribute>
         <optional>
-          <ref name='address'/>
+          <attribute name='maxCount'>
+            <ref name='unsignedInt'/>
+          </attribute>
         </optional>
+        <zeroOrMore>
+          <ref name='address'/>
+        </zeroOrMore>
       </element>
     </optional>
 
diff --git a/tests/nodedevschemadata/pci_0000_02_10_7_sriov.xml b/tests/nodedevschemadata/pci_0000_02_10_7_sriov.xml
new file mode 100644
index 0000000000..8f243b4d61
--- /dev/null
+++ b/tests/nodedevschemadata/pci_0000_02_10_7_sriov.xml
@@ -0,0 +1,23 @@
+<device>
+  <name>pci_0000_02_10_7</name>
+  <parent>pci_0000_00_04_0</parent>
+  <capability type='pci'>
+    <domain>0</domain>
+    <bus>2</bus>
+    <slot>16</slot>
+    <function>7</function>
+    <product id='0x10ca'>82576 Virtual Function</product>
+    <vendor id='0x8086'>Intel Corporation</vendor>
+    <capability type='phys_function'>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/>
+    </capability>
+    <iommuGroup number='31'>
+      <address domain='0x0000' bus='0x02' slot='0x10' function='0x7'/>
+    </iommuGroup>
+    <numa node='0'/>
+    <pci-express>
+      <link validity='cap' port='0' speed='2.5' width='4'/>
+      <link validity='sta' width='0'/>
+    </pci-express>
+  </capability>
+</device>
diff --git a/tests/nodedevschemadata/pci_0000_02_10_7_sriov_pf_vfs_all.xml b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_pf_vfs_all.xml
new file mode 100644
index 0000000000..9e8dace020
--- /dev/null
+++ b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_pf_vfs_all.xml
@@ -0,0 +1,29 @@
+<device>
+  <name>pci_0000_02_10_7</name>
+  <parent>pci_0000_00_04_0</parent>
+  <capability type='pci'>
+    <domain>0</domain>
+    <bus>2</bus>
+    <slot>16</slot>
+    <function>7</function>
+    <product id='0x10ca'>82576 Virtual Function</product>
+    <vendor id='0x8086'>Intel Corporation</vendor>
+    <capability type='phys_function'>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/>
+    </capability>
+    <capability type='virt_functions' maxCount='7'>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x2'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x3'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x4'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x5'/>
+    </capability>
+    <iommuGroup number='31'>
+      <address domain='0x0000' bus='0x02' slot='0x10' function='0x7'/>
+    </iommuGroup>
+    <numa node='0'/>
+    <pci-express>
+      <link validity='cap' port='0' speed='2.5' width='4'/>
+      <link validity='sta' width='0'/>
+    </pci-express>
+  </capability>
+</device>
diff --git a/tests/nodedevschemadata/pci_0000_02_10_7_sriov_pf_vfs_all_header_type.xml b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_pf_vfs_all_header_type.xml
new file mode 100644
index 0000000000..4e6323a3ec
--- /dev/null
+++ b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_pf_vfs_all_header_type.xml
@@ -0,0 +1,30 @@
+<device>
+  <name>pci_0000_02_10_7</name>
+  <parent>pci_0000_00_04_0</parent>
+  <capability type='pci'>
+    <domain>0</domain>
+    <bus>2</bus>
+    <slot>16</slot>
+    <function>7</function>
+    <product id='0x10ca'>82576 Virtual Function</product>
+    <vendor id='0x8086'>Intel Corporation</vendor>
+    <capability type='phys_function'>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/>
+    </capability>
+    <capability type='virt_functions' maxCount='7'>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x2'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x3'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x4'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x5'/>
+    </capability>
+    <capability type='pci-bridge'/>
+    <iommuGroup number='31'>
+      <address domain='0x0000' bus='0x02' slot='0x10' function='0x7'/>
+    </iommuGroup>
+    <numa node='0'/>
+    <pci-express>
+      <link validity='cap' port='0' speed='2.5' width='4'/>
+      <link validity='sta' width='0'/>
+    </pci-express>
+  </capability>
+</device>
diff --git a/tests/nodedevschemadata/pci_0000_02_10_7_sriov_vfs.xml b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_vfs.xml
new file mode 100644
index 0000000000..355eaaad97
--- /dev/null
+++ b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_vfs.xml
@@ -0,0 +1,26 @@
+<device>
+  <name>pci_0000_02_10_7</name>
+  <parent>pci_0000_00_04_0</parent>
+  <capability type='pci'>
+    <domain>0</domain>
+    <bus>2</bus>
+    <slot>16</slot>
+    <function>7</function>
+    <product id='0x10ca'>82576 Virtual Function</product>
+    <vendor id='0x8086'>Intel Corporation</vendor>
+    <capability type='virt_functions'>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x2'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x3'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x4'/>
+      <address domain='0x0000' bus='0x02' slot='0x00' function='0x5'/>
+    </capability>
+    <iommuGroup number='31'>
+      <address domain='0x0000' bus='0x02' slot='0x10' function='0x7'/>
+    </iommuGroup>
+    <numa node='0'/>
+    <pci-express>
+      <link validity='cap' port='0' speed='2.5' width='4'/>
+      <link validity='sta' width='0'/>
+    </pci-express>
+  </capability>
+</device>
diff --git a/tests/nodedevschemadata/pci_0000_02_10_7_sriov_zero_vfs_max_count.xml b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_zero_vfs_max_count.xml
new file mode 100644
index 0000000000..e9eb122bfe
--- /dev/null
+++ b/tests/nodedevschemadata/pci_0000_02_10_7_sriov_zero_vfs_max_count.xml
@@ -0,0 +1,21 @@
+<device>
+  <name>pci_0000_02_10_7</name>
+  <parent>pci_0000_00_04_0</parent>
+  <capability type='pci'>
+    <domain>0</domain>
+    <bus>2</bus>
+    <slot>16</slot>
+    <function>7</function>
+    <product id='0x10ca'>82576 Virtual Function</product>
+    <vendor id='0x8086'>Intel Corporation</vendor>
+    <capability type='virt_functions' maxCount='3'/>
+    <iommuGroup number='31'>
+      <address domain='0x0000' bus='0x02' slot='0x10' function='0x7'/>
+    </iommuGroup>
+    <numa node='0'/>
+    <pci-express>
+      <link validity='cap' port='0' speed='2.5' width='4'/>
+      <link validity='sta' width='0'/>
+    </pci-express>
+  </capability>
+</device>