virt-install: add --features msrs.unknown=ignore

Fixes: https://github.com/virt-manager/virt-manager/issues/570

Signed-off-by: Cole Robinson <crobinso@redhat.com>

tests/data/cli/compare/virt-install-many-devices.xml

@@ -162,6 +162,7 @@
     <smm state="off"/>
     <vmcoreinfo state="on"/>
     <ioapic driver="qemu"/>
+    <msrs unknown="ignore"/>
   </features>
   <cpu mode="custom" match="strict" check="partial">
     <model fallback="allow" vendor_id="GenuineIntel">foobar</model>

tests/test_cli.py

@@ -580,7 +580,8 @@ hyperv.tlbflush.state=on,\
 hyperv.ipi.state=on,\
 hyperv.evmcs.state=on,\
 hyperv.avic.state=on,\
-kvm.pv-ipi.state=on
+kvm.pv-ipi.state=on,\
+msrs.unknown=ignore
 
 
 --clock offset=utc,hpet_present=no,rtc_tickpolicy=merge,timer2.name=hypervclock,timer3.name=pit,timer1.present=yes,timer3.tickpolicy=delay,timer2.present=no,timer4.name=rtc,timer5.name=tsc,timer6.name=tsc,timer4.track=wall,timer5.frequency=10,timer6.mode=emulate,timer7.name=rtc,timer7.tickpolicy=catchup,timer7.catchup.threshold=123,timer7.catchup.slew=120,timer7.catchup.limit=10000,rtc_present=no,pit_present=yes,pit_tickpolicy=catchup,tsc_present=no,platform_present=no,hypervclock_present=no,platform_tickpolicy=foo,hpet_tickpolicy=bar,tsc_tickpolicy=wibble,kvmclock_tickpolicy=wobble,hypervclock_tickpolicy=woo

virtinst/cli.py

@@ -3095,6 +3095,7 @@ class ParserFeatures(VirtCLIParser):
         cls.add_arg("smm.state", "smm", is_onoff=True)
         cls.add_arg("vmcoreinfo.state", "vmcoreinfo", is_onoff=True)
         cls.add_arg("ioapic.driver", "ioapic_driver")
+        cls.add_arg("msrs.unknown", "msrs_unknown")
 
 
 ###################

virtinst/domain/features.py

@@ -54,6 +54,7 @@ class DomainFeatures(XMLBuilder):
     smm = XMLProperty("./smm/@state", is_onoff=True)
     vmcoreinfo = XMLProperty("./vmcoreinfo/@state", is_onoff=True)
     ioapic_driver = XMLProperty("./ioapic/@driver")
+    msrs_unknown = XMLProperty("./msrs/@unknown")
 
 
     ##################