[libvirt] [PATCH 1/2] conf: add crash to hyperv features

[Dmitry Andreev]

Add crash CPU feature for Hyper-V. Hyper-V crash MSR's can be used
by Hyper-V based guests to notify about occurred guest crash.

XML:
<features>
  <hyperv>
    <crash state='on'/>
  </hyperv>
</features>
---
 docs/formatdomain.html.in     | 7 +++++++
 docs/schemas/domaincommon.rng | 5 +++++
 src/conf/domain_conf.c        | 6 +++++-
 src/conf/domain_conf.h        | 1 +
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index c88b032..87abeb7 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1460,6 +1460,7 @@
       <relaxed state='on'/>
       <vapic state='on'/>
       <spinlocks state='on' retries='4096'/>
+      <crash state='on'/>
     </hyperv>
     <kvm>
       <hidden state='on'/>
@@ -1535,6 +1536,12 @@
           <td>on, off; retries - at least 4095</td>
           <td><span class="since">1.1.0 (QEMU only)</span></td>
         </tr>
+        <tr>
+          <td>crash</td>
+          <td>Enable guest crash notification</td>
+          <td>on, off</td>
+          <td><span class="since">2.5.0 (QEMU only)</span></td>
+        </tr>
       </table>
       </dd>
       <dt><code>pvspinlock</code></dt>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index f196177..07e73df 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4827,6 +4827,11 @@
             </optional>
           </element>
         </optional>
+        <optional>
+          <element name="crash">
+            <ref name="featurestate"/>
+          </element>
+        </optional>
       </interleave>
     </element>
   </define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 0c559d2..00f291d 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -159,7 +159,8 @@ VIR_ENUM_IMPL(virDomainCapabilitiesPolicy, VIR_DOMAIN_CAPABILITIES_POLICY_LAST,
 VIR_ENUM_IMPL(virDomainHyperv, VIR_DOMAIN_HYPERV_LAST,
               "relaxed",
               "vapic",
-              "spinlocks")
+              "spinlocks",
+              "crash")
 
 VIR_ENUM_IMPL(virDomainKVM, VIR_DOMAIN_KVM_LAST,
               "hidden")
@@ -15466,6 +15467,7 @@ virDomainDefParseXML(xmlDocPtr xml,
             switch ((virDomainHyperv) feature) {
                 case VIR_DOMAIN_HYPERV_RELAXED:
                 case VIR_DOMAIN_HYPERV_VAPIC:
+                case VIR_DOMAIN_HYPERV_CRASH:
                     if (!(tmp = virXPathString("string(./@state)", ctxt))) {
                         virReportError(VIR_ERR_XML_ERROR,
                                        _("missing 'state' attribute for "
@@ -17535,6 +17537,7 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src,
             switch ((virDomainHyperv) i) {
             case VIR_DOMAIN_HYPERV_RELAXED:
             case VIR_DOMAIN_HYPERV_VAPIC:
+            case VIR_DOMAIN_HYPERV_CRASH:
                 if (src->hyperv_features[i] != dst->hyperv_features[i]) {
                     virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                                    _("State of HyperV enlightenment "
@@ -22091,6 +22094,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
                     switch ((virDomainHyperv) j) {
                     case VIR_DOMAIN_HYPERV_RELAXED:
                     case VIR_DOMAIN_HYPERV_VAPIC:
+                    case VIR_DOMAIN_HYPERV_CRASH:
                         if (def->hyperv_features[j])
                             virBufferAsprintf(buf, "<%s state='%s'/>\n",
                                               virDomainHypervTypeToString(j),
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index fd4ef82..4f35b6c 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1692,6 +1692,7 @@ typedef enum {
     VIR_DOMAIN_HYPERV_RELAXED = 0,
     VIR_DOMAIN_HYPERV_VAPIC,
     VIR_DOMAIN_HYPERV_SPINLOCKS,
+    VIR_DOMAIN_HYPERV_CRASH,
 
     VIR_DOMAIN_HYPERV_LAST
 } virDomainHyperv;
-- 
1.8.3.1