capabilities: Extend capabilities with iommu_support

Signed-off-by: Filip Alac <filipalac@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

docs/schemas/capability.rng

@@ -39,6 +39,9 @@
       <optional>
         <ref name='power_management'/>
       </optional>
+      <optional>
+        <ref name='iommu_support'/>
+      </optional>
       <optional>
         <ref name='migration'/>
       </optional>
@@ -155,6 +158,16 @@
     </element>
   </define>
 
+  <define name='iommu_support'>
+    <element name='iommu'>
+      <optional>
+        <attribute name='support'>
+          <ref name='virYesNo'/>
+        </attribute>
+      </optional>
+    </element>
+  </define>
+
   <define name='migration'>
     <element name='migration_features'>
       <optional>

src/conf/capabilities.c

@@ -1025,6 +1025,9 @@ virCapabilitiesFormatXML(virCapsPtr caps)
         virBufferAddLit(&buf, "<power_management/>\n");
     }
 
+    virBufferAsprintf(&buf, "<iommu support='%s'/>\n",
+                      caps->host.iommu  ? "yes" : "no");
+
     if (caps->host.offlineMigrate) {
         virBufferAddLit(&buf, "<migration_features>\n");
         virBufferAdjustIndent(&buf, 2);
@@ -1743,3 +1746,10 @@ virCapabilitiesInitCaches(virCapsPtr caps)
     virBitmapFree(cpus);
     return ret;
 }
+
+
+void
+virCapabilitiesHostInitIOMMU(virCapsPtr caps)
+{
+    caps->host.iommu = virHostHasIOMMU();
+}

src/conf/capabilities.h

@@ -183,6 +183,7 @@ struct _virCapsHost {
     int nPagesSize;             /* size of pagesSize array */
     unsigned int *pagesSize;    /* page sizes support on the system */
     unsigned char host_uuid[VIR_UUID_BUFLEN];
+    bool iommu;
 };
 
 typedef int (*virDomainDefNamespaceParse)(xmlDocPtr, xmlNodePtr,
@@ -327,4 +328,6 @@ void virCapsHostCacheBankFree(virCapsHostCacheBankPtr ptr);
 
 int virCapabilitiesInitCaches(virCapsPtr caps);
 
+void virCapabilitiesHostInitIOMMU(virCapsPtr caps);
+
 #endif /* __VIR_CAPABILITIES_H */

src/libvirt_private.syms

@@ -58,6 +58,7 @@ virCapabilitiesFreeMachines;
 virCapabilitiesFreeNUMAInfo;
 virCapabilitiesGetCpusForNodemask;
 virCapabilitiesGetNodeInfo;
+virCapabilitiesHostInitIOMMU;
 virCapabilitiesHostSecModelAddBaseLabel;
 virCapabilitiesInitCaches;
 virCapabilitiesInitNUMA;

src/qemu/qemu_capabilities.c

@@ -948,6 +948,9 @@ virQEMUCapsInit(virFileCachePtr cache)
     if (virNodeSuspendGetTargetMask(&caps->host.powerMgmt) < 0)
         VIR_WARN("Failed to get host power management capabilities");
 
+    /* Add IOMMU info */
+    virCapabilitiesHostInitIOMMU(caps);
+
     /* Add huge pages info */
     if (virCapabilitiesInitPages(caps) < 0)
         VIR_WARN("Failed to get pages info");

src/test/test_driver.c

@@ -322,6 +322,8 @@ testBuildCapabilities(virConnectPtr conn)
     if (virCapabilitiesAddHostFeature(caps, "nonpae") < 0)
         goto error;
 
+    virCapabilitiesHostInitIOMMU(caps);
+
     if (VIR_ALLOC_N(caps->host.pagesSize, 4) < 0)
         goto error;
 

tests/qemucaps2xmldata/all_1.6.0-1.xml

@@ -5,6 +5,7 @@
       <arch>i686</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
   </host>
 
   <guest>

tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.xml

@@ -5,6 +5,7 @@
       <arch>i686</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
   </host>
 
   <guest>

tests/vircaps2xmldata/vircaps-aarch64-basic.xml

@@ -5,6 +5,7 @@
       <arch>aarch64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <migration_features>
     </migration_features>
     <topology>

tests/vircaps2xmldata/vircaps-x86_64-basic.xml

@@ -5,6 +5,7 @@
       <arch>x86_64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <topology>
       <cells num='4'>
         <cell id='0'>

tests/vircaps2xmldata/vircaps-x86_64-caches.xml

@@ -5,6 +5,7 @@
       <arch>x86_64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <migration_features>
       <live/>
     </migration_features>

tests/vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml

@@ -5,6 +5,7 @@
       <arch>x86_64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <migration_features>
       <live/>
     </migration_features>

tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx-twocaches.xml

@@ -5,6 +5,7 @@
       <arch>x86_64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <migration_features>
       <live/>
     </migration_features>

tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml

@@ -5,6 +5,7 @@
       <arch>x86_64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <migration_features>
       <live/>
     </migration_features>

tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml

@@ -5,6 +5,7 @@
       <arch>x86_64</arch>
     </cpu>
     <power_management/>
+    <iommu support='no'/>
     <migration_features>
       <live/>
     </migration_features>