domcaps: Report launchSecurity

In order to learn what types of <launchSecurity/> are supported
users can turn to domain capabilities and find <sev/> and
<s390-pv/> elements. While these may expose some additional info
on individual launchSecurity types, we are lacking clean
enumeration (like we do for say device models). And given that
SEV and SEV SNP share the same basis (info found under <sev/> is
applicable to SEV SNP too) we have no other way to report SEV SNP
support.

Therefore, report supported launchSecurity types in domain
capabilities.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

src/conf/domain_capabilities.c

@@ -707,6 +707,19 @@ virDomainCapsFeatureHypervFormat(virBuffer *buf,
     FORMAT_EPILOGUE(hyperv);
 }
 
+
+static void
+virDomainCapsLaunchSecurityFormat(virBuffer *buf,
+                                  const virDomainCapsLaunchSecurity *launchSecurity)
+{
+    FORMAT_PROLOGUE(launchSecurity);
+
+    ENUM_PROCESS(launchSecurity, sectype, virDomainLaunchSecurityTypeToString);
+
+    FORMAT_EPILOGUE(launchSecurity);
+}
+
+
 static void
 virDomainCapsFormatFeatures(const virDomainCaps *caps,
                             virBuffer *buf)
@@ -728,6 +741,7 @@ virDomainCapsFormatFeatures(const virDomainCaps *caps,
     virDomainCapsFeatureSEVFormat(&childBuf, caps->sev);
     virDomainCapsFeatureSGXFormat(&childBuf, caps->sgx);
     virDomainCapsFeatureHypervFormat(&childBuf, caps->hyperv);
+    virDomainCapsLaunchSecurityFormat(&childBuf, &caps->launchSecurity);
 
     virXMLFormatElement(buf, "features", NULL, &childBuf);
 }

src/conf/domain_capabilities.h

@@ -165,6 +165,14 @@ struct _virDomainCapsFeatureHyperv {
     virDomainCapsEnum features; /* Info about supported virDomainHyperv features */
 };
 
+STATIC_ASSERT_ENUM(VIR_DOMAIN_LAUNCH_SECURITY_LAST);
+typedef struct _virDomainCapsLaunchSecurity virDomainCapsLaunchSecurity;
+struct _virDomainCapsLaunchSecurity {
+    virTristateBool supported;
+    virDomainCapsEnum sectype; /* Info about supported virDomainLaunchSecurity */
+};
+
+
 typedef enum {
     VIR_DOMCAPS_CPU_USABLE_UNKNOWN,
     VIR_DOMCAPS_CPU_USABLE_YES,
@@ -284,6 +292,7 @@ struct _virDomainCaps {
     virSEVCapability *sev;
     virSGXCapability *sgx;
     virDomainCapsFeatureHyperv *hyperv;
+    virDomainCapsLaunchSecurity launchSecurity;
     /* add new domain features here */
 
     virTristateBool features[VIR_DOMAIN_CAPS_FEATURE_LAST];

src/conf/schemas/domaincaps.rng

@@ -285,6 +285,13 @@
     </element>
   </define>
 
+  <define name="launchSecurity">
+    <element name="launchSecurity">
+      <ref name="supported"/>
+      <ref name="enum"/>
+    </element>
+  </define>
+
   <define name="features">
     <element name="features">
       <optional>
@@ -317,6 +324,9 @@
       <optional>
         <ref name="hyperv"/>
       </optional>
+      <optional>
+        <ref name='launchSecurity'/>
+      </optional>
     </element>
   </define>