Add a new <timer> for the HyperV reference time counter enlightenment
for Windows guests.
This feature provides a paravirtual approach to track timer events for
the quest (similar to kvmclock).
---
docs/formatdomain.html.in | 7 ++++-
docs/schemas/domaincommon.rng | 5 +++-
src/conf/domain_conf.c | 6 +++--
src/conf/domain_conf.h | 1 +
src/qemu/qemu_command.c | 30 ++++++++++++----------
.../qemuxml2argv-clock-timer-hyperv-rtc.args | 5 ++++
.../qemuxml2argv-clock-timer-hyperv-rtc.xml | 26 +++++++++++++++++++
tests/qemuxml2argvtest.c | 1 +
tests/qemuxml2xmltest.c | 1 +
9 files changed, 65 insertions(+), 17 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.xml
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index fd02864..451ce8f 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1367,7 +1367,12 @@
being modified, and can be one of
"platform" (currently unsupported),
"hpet" (libxl, xen, qemu), "kvmclock" (qemu),
- "pit" (qemu), "rtc" (qemu), or "tsc" (libxl).
+ "pit" (qemu), "rtc" (qemu), "tsc" (libxl) or "hyperv_rtc"
+ (qemu - <span class="since">since 1.2.2</span>).
+
+ The <code>hyperv_rtc</code> timer adds support for the
+ "reference time counter" feature for guests running the
+ Microsoft Windows operating system.
</dd>
<dt><code>track</code></dt>
<dd>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 12fc0db..96e62d3 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -915,7 +915,10 @@
</group>
<group>
<attribute name="name">
- <value>kvmclock</value>
+ <choice>
+ <value>kvmclock</value>
+ <value>hyperv_rtc</value>
+ </choice>
</attribute>
</group>
</choice>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b6c984b..33b5bee 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -726,7 +726,8 @@ VIR_ENUM_IMPL(virDomainTimerName, VIR_DOMAIN_TIMER_NAME_LAST,
"rtc",
"hpet",
"tsc",
- "kvmclock");
+ "kvmclock",
+ "hyperv_rtc");
VIR_ENUM_IMPL(virDomainTimerTrack, VIR_DOMAIN_TIMER_TRACK_LAST,
"boot",
@@ -2929,7 +2930,8 @@ virDomainDefPostParseInternal(virDomainDefPtr def,
for (i = 0; i < def->clock.ntimers; i++) {
virDomainTimerDefPtr timer = def->clock.timers[i];
- if (timer->name == VIR_DOMAIN_TIMER_NAME_KVMCLOCK) {
+ if (timer->name == VIR_DOMAIN_TIMER_NAME_KVMCLOCK ||
+ timer->name == VIR_DOMAIN_TIMER_NAME_HYPERV_RTC) {
if (timer->tickpolicy != -1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("timer %s doesn't support setting of "
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index d8f2e49..300ba26 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1750,6 +1750,7 @@ enum virDomainTimerNameType {
VIR_DOMAIN_TIMER_NAME_HPET,
VIR_DOMAIN_TIMER_NAME_TSC,
VIR_DOMAIN_TIMER_NAME_KVMCLOCK,
+ VIR_DOMAIN_TIMER_NAME_HYPERV_RTC,
VIR_DOMAIN_TIMER_NAME_LAST
};
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index eef65ae..bc5219c 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6728,20 +6728,23 @@ qemuBuildCpuArgStr(virQEMUDriverPtr driver,
}
}
- /* Now force kvmclock on/off based on the corresponding <timer> element. */
+ /* Handle paravirtual timers */
for (i = 0; i < def->clock.ntimers; i++) {
- if (def->clock.timers[i]->name == VIR_DOMAIN_TIMER_NAME_KVMCLOCK &&
- def->clock.timers[i]->present != -1) {
- char sign;
- if (def->clock.timers[i]->present)
- sign = '+';
- else
- sign = '-';
+ virDomainTimerDefPtr timer = def->clock.timers[i];
+
+ if (timer->present == -1)
+ continue;
+
+ if (timer->name == VIR_DOMAIN_TIMER_NAME_KVMCLOCK) {
virBufferAsprintf(&buf, "%s,%ckvmclock",
have_cpu ? "" : default_model,
- sign);
+ timer->present ? '+' : '-');
+ have_cpu = true;
+ } else if (timer->name == VIR_DOMAIN_TIMER_NAME_HYPERV_RTC &&
+ timer->present) {
+ virBufferAsprintf(&buf, "%s,hv_time",
+ have_cpu ? "" : default_model);
have_cpu = true;
- break;
}
}
@@ -8003,8 +8006,7 @@ qemuBuildCommandLine(virConnectPtr conn,
}
for (i = 0; i < def->clock.ntimers; i++) {
- switch (def->clock.timers[i]->name) {
- default:
+ switch ((enum virDomainTimerNameType) def->clock.timers[i]->name) {
case VIR_DOMAIN_TIMER_NAME_PLATFORM:
case VIR_DOMAIN_TIMER_NAME_TSC:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -8013,7 +8015,9 @@ qemuBuildCommandLine(virConnectPtr conn,
goto error;
case VIR_DOMAIN_TIMER_NAME_KVMCLOCK:
- /* This is handled when building -cpu. */
+ case VIR_DOMAIN_TIMER_NAME_HYPERV_RTC:
+ /* Timers above are handled when building -cpu. */
+ case VIR_DOMAIN_TIMER_NAME_LAST:
break;
case VIR_DOMAIN_TIMER_NAME_RTC:
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.args b/tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.args
new file mode 100644
index 0000000..1905875
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.args
@@ -0,0 +1,5 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/kvm -S -M pc \
+-cpu qemu32,hv_time -m 214 -smp 6 \
+-nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot n -usb -net \
+none -serial none -parallel none
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.xml b/tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.xml
new file mode 100644
index 0000000..47c7c42
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-clock-timer-hyperv-rtc.xml
@@ -0,0 +1,26 @@
+<domain type='kvm'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>6</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='network'/>
+ </os>
+ <features>
+ <pae/>
+ </features>
+ <clock offset='utc'>
+ <timer name='hyperv_rtc' present='yes'/>
+ </clock>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/kvm</emulator>
+ <controller type='usb' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index a25264e..1394d68 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -628,6 +628,7 @@ mymain(void)
DO_TEST("cpu-kvmclock", QEMU_CAPS_ENABLE_KVM);
DO_TEST("cpu-host-kvmclock", QEMU_CAPS_ENABLE_KVM, QEMU_CAPS_CPU_HOST);
DO_TEST("kvmclock", QEMU_CAPS_KVM);
+ DO_TEST("clock-timer-hyperv-rtc", QEMU_CAPS_KVM);
DO_TEST("cpu-eoi-disabled", QEMU_CAPS_ENABLE_KVM);
DO_TEST("cpu-eoi-enabled", QEMU_CAPS_ENABLE_KVM);
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 41d1904..e12a0ab 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -159,6 +159,7 @@ mymain(void)
DO_TEST("cpu-kvmclock");
DO_TEST("cpu-host-kvmclock");
DO_TEST("kvmclock");
+ DO_TEST("clock-timer-hyperv-rtc");
DO_TEST("cpu-eoi-disabled");
DO_TEST("cpu-eoi-enabled");
--
1.8.5.3
--
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