11:54 a.m.
The hyperv enlightenment features allow to ease guests timekeeping by
allowing to store offset from the TSC as a reference. Add the support
for enabling this flag in qemu.
---
Notes:
This feature is still under development in qemu. I will wait until it's finished
before pushing this:
http://lists.nongnu.org/archive/html/qemu-devel/2014-01/msg02569.html
docs/formatdomain.html.in | 7 +++++++
src/conf/domain_conf.c | 6 +++++-
src/conf/domain_conf.h | 1 +
src/qemu/qemu_command.c | 2 ++
4 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index ff50214..6e1f93a 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1194,6 +1194,7 @@
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
+ <time state='on'/>
<spinlocks state='on' retries='4096'/>
</hyperv>
<pvspinlock/>
@@ -1266,6 +1267,12 @@
<td>on, off; retries - at least 4095</td>
<td><span class="since">1.1.0 (QEMU
only)</span></td>
</tr>
+ <tr>
+ <td>time</td>
+ <td>Ease timekeeping in guests by providing reference TSC
offsets</td>
+ <td>on, off</td>
+ <td><span class="since">1.2.2 (QEMU
only)</span></td>
+ </tr>
</table>
</dd>
<dt><code>pvspinlock</code></dt>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 28e24f9..a3f7284 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -153,7 +153,8 @@ VIR_ENUM_IMPL(virDomainFeatureState, VIR_DOMAIN_FEATURE_STATE_LAST,
VIR_ENUM_IMPL(virDomainHyperv, VIR_DOMAIN_HYPERV_LAST,
"relaxed",
"vapic",
- "spinlocks")
+ "spinlocks",
+ "time")
VIR_ENUM_IMPL(virDomainLifecycle, VIR_DOMAIN_LIFECYCLE_LAST,
"destroy",
@@ -11720,6 +11721,7 @@ virDomainDefParseXML(xmlDocPtr xml,
switch ((enum virDomainHyperv) feature) {
case VIR_DOMAIN_HYPERV_RELAXED:
case VIR_DOMAIN_HYPERV_VAPIC:
+ case VIR_DOMAIN_HYPERV_TIME:
if (!(tmp = virXPathString("string(./@state)", ctxt))) {
virReportError(VIR_ERR_XML_ERROR,
_("missing 'state' attribute for
"
@@ -13744,6 +13746,7 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src,
switch ((enum virDomainHyperv) i) {
case VIR_DOMAIN_HYPERV_RELAXED:
case VIR_DOMAIN_HYPERV_VAPIC:
+ case VIR_DOMAIN_HYPERV_TIME:
if (src->hyperv_features[i] != dst->hyperv_features[i]) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("State of HyperV enlightenment "
@@ -17226,6 +17229,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
switch ((enum virDomainHyperv) j) {
case VIR_DOMAIN_HYPERV_RELAXED:
case VIR_DOMAIN_HYPERV_VAPIC:
+ case VIR_DOMAIN_HYPERV_TIME:
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 d8f2e49..2516341 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1658,6 +1658,7 @@ enum virDomainHyperv {
VIR_DOMAIN_HYPERV_RELAXED = 0,
VIR_DOMAIN_HYPERV_VAPIC,
VIR_DOMAIN_HYPERV_SPINLOCKS,
+ VIR_DOMAIN_HYPERV_TIME,
VIR_DOMAIN_HYPERV_LAST
};
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 96b8825..7cf9ec9 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6779,6 +6779,7 @@ qemuBuildCpuArgStr(virQEMUDriverPtr driver,
switch ((enum virDomainHyperv) i) {
case VIR_DOMAIN_HYPERV_RELAXED:
case VIR_DOMAIN_HYPERV_VAPIC:
+ case VIR_DOMAIN_HYPERV_TIME:
if (def->hyperv_features[i] == VIR_DOMAIN_FEATURE_STATE_ON)
virBufferAsprintf(&buf, ",hv_%s",
virDomainHypervTypeToString(i));
@@ -10971,6 +10972,7 @@ qemuParseCommandLineCPU(virDomainDefPtr dom,
switch ((enum virDomainHyperv) f) {
case VIR_DOMAIN_HYPERV_RELAXED:
case VIR_DOMAIN_HYPERV_VAPIC:
+ case VIR_DOMAIN_HYPERV_TIME:
if (value) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("HyperV feature '%s' should not "
--
1.8.5.3