xlconfigtest: add tests for 'nestedhvm' support

Testing various configuration schemas targeting postive and negative
nestedhvm under libvirt <cpu mode="host-passthrough"> configuration.

Mode "host-passthrough" generates nestedhvm=1 in/from xl format where

Intel virtualization (VT-x):
<feature policy='disable' name='vmx'/>

    or

AMD virtualization (AMD-V):
<feature policy='disable' name='svm'/>

disables virtualization mode under guest domains.
Signed-off-by: NWim ten Have <wim.ten.have@oracle.com>
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

tests/testutilsxen.c

@@ -6,6 +6,33 @@
 #include "testutilsxen.h"
 #include "domain_conf.h"
 
+static virCPUFeatureDef cpuDefaultFeatures[] = {
+    { (char *) "ds",        -1 },
+    { (char *) "acpi",      -1 },
+    { (char *) "ss",        -1 },
+    { (char *) "ht",        -1 },
+    { (char *) "tm",        -1 },
+    { (char *) "pbe",       -1 },
+    { (char *) "ds_cpl",    -1 },
+    { (char *) "vmx",       -1 },
+    { (char *) "est",       -1 },
+    { (char *) "tm2",       -1 },
+    { (char *) "cx16",      -1 },
+    { (char *) "xtpr",      -1 },
+    { (char *) "lahf_lm",   -1 },
+};
+static virCPUDef cpuDefaultData = {
+    .type = VIR_CPU_TYPE_HOST,
+    .arch = VIR_ARCH_X86_64,
+    .model = (char *) "core2duo",
+    .vendor = (char *) "Intel",
+    .sockets = 1,
+    .cores = 2,
+    .threads = 1,
+    .nfeatures = ARRAY_CARDINALITY(cpuDefaultFeatures),
+    .nfeatures_max = ARRAY_CARDINALITY(cpuDefaultFeatures),
+    .features = cpuDefaultFeatures,
+};
 
 virCapsPtr testXenCapsInit(void)
 {
@@ -88,6 +115,9 @@ testXLInitCaps(void)
     if ((caps = virCapabilitiesNew(virArchFromHost(),
                                    false, false)) == NULL)
         return NULL;
+
+    caps->host.cpu = virCPUDefCopy(&cpuDefaultData);
+
     nmachines = ARRAY_CARDINALITY(x86_machines);
     if ((machines = virCapabilitiesAllocMachines(x86_machines, nmachines)) == NULL)
         goto cleanup;

tests/xlconfigdata/test-fullvirt-nestedhvm-disabled.cfg

+name = "XenGuest2"
+uuid = "c7a5fdb2-cdaf-9455-926a-d65c16db1809"
+maxmem = 579
+memory = 394
+vcpus = 1
+pae = 1
+acpi = 1
+apic = 1
+viridian = 0
+rtc_timeoffset = 0
+localtime = 0
+on_poweroff = "destroy"
+on_reboot = "restart"
+on_crash = "restart"
+device_model = "/usr/lib/xen/bin/qemu-system-i386"
+sdl = 0
+vnc = 1
+vncunused = 1
+vnclisten = "127.0.0.1"
+vif = [ "mac=00:16:3e:66:92:9c,bridge=xenbr1,script=vif-bridge,model=e1000" ]
+parallel = "none"
+serial = "none"
+builder = "hvm"
+boot = "d"
+nestedhvm = 0
+disk = [ "format=raw,vdev=hda,access=rw,backendtype=phy,target=/dev/HostVG/XenGuest2", "format=qcow2,vdev=hdb,access=rw,backendtype=qdisk,target=/var/lib/libvirt/images/XenGuest2-home", "format=raw,vdev=hdc,access=ro,backendtype=qdisk,devtype=cdrom,target=/root/boot.iso" ]

tests/xlconfigdata/test-fullvirt-nestedhvm-disabled.xml

+<domain type='xen'>
+  <name>XenGuest2</name>
+  <uuid>c7a5fdb2-cdaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>592896</memory>
+  <currentMemory unit='KiB'>403456</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='xenfv'>hvm</type>
+    <loader type='rom'>/usr/lib/xen/boot/hvmloader</loader>
+    <boot dev='cdrom'/>
+  </os>
+  <features>
+    <acpi/>
+    <apic/>
+    <pae/>
+  </features>
+  <cpu mode='host-passthrough'>
+    <feature policy='disable' name='vmx'/>
+  </cpu>
+  <clock offset='variable' adjustment='0' basis='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <emulator>/usr/lib/xen/bin/qemu-system-i386</emulator>
+    <disk type='block' device='disk'>
+      <driver name='phy' type='raw'/>
+      <source dev='/dev/HostVG/XenGuest2'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/XenGuest2-home'/>
+      <target dev='hdb' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
+    </disk>
+    <disk type='file' device='cdrom'>
+      <driver name='qemu' type='raw'/>
+      <source file='/root/boot.iso'/>
+      <target dev='hdc' bus='ide'/>
+      <readonly/>
+      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+    <interface type='bridge'>
+      <mac address='00:16:3e:66:92:9c'/>
+      <source bridge='xenbr1'/>
+      <script path='vif-bridge'/>
+      <model type='e1000'/>
+    </interface>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'>
+      <listen type='address' address='127.0.0.1'/>
+    </graphics>
+    <video>
+      <model type='cirrus' vram='8192' heads='1' primary='yes'/>
+    </video>
+  </devices>
+</domain>

tests/xlconfigdata/test-fullvirt-nestedhvm.cfg

+name = "XenGuest2"
+uuid = "c7a5fdb2-cdaf-9455-926a-d65c16db1809"
+maxmem = 579
+memory = 394
+vcpus = 1
+pae = 1
+acpi = 1
+apic = 1
+viridian = 0
+rtc_timeoffset = 0
+localtime = 0
+on_poweroff = "destroy"
+on_reboot = "restart"
+on_crash = "restart"
+device_model = "/usr/lib/xen/bin/qemu-system-i386"
+sdl = 0
+vnc = 1
+vncunused = 1
+vnclisten = "127.0.0.1"
+vif = [ "mac=00:16:3e:66:92:9c,bridge=xenbr1,script=vif-bridge,model=e1000" ]
+parallel = "none"
+serial = "none"
+builder = "hvm"
+boot = "d"
+nestedhvm = 1
+disk = [ "format=raw,vdev=hda,access=rw,backendtype=phy,target=/dev/HostVG/XenGuest2", "format=qcow2,vdev=hdb,access=rw,backendtype=qdisk,target=/var/lib/libvirt/images/XenGuest2-home", "format=raw,vdev=hdc,access=ro,backendtype=qdisk,devtype=cdrom,target=/root/boot.iso" ]

tests/xlconfigdata/test-fullvirt-nestedhvm.xml

+<domain type='xen'>
+  <name>XenGuest2</name>
+  <uuid>c7a5fdb2-cdaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>592896</memory>
+  <currentMemory unit='KiB'>403456</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='xenfv'>hvm</type>
+    <loader type='rom'>/usr/lib/xen/boot/hvmloader</loader>
+    <boot dev='cdrom'/>
+  </os>
+  <features>
+    <acpi/>
+    <apic/>
+    <pae/>
+  </features>
+  <cpu mode='host-passthrough'/>
+  <clock offset='variable' adjustment='0' basis='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <emulator>/usr/lib/xen/bin/qemu-system-i386</emulator>
+    <disk type='block' device='disk'>
+      <driver name='phy' type='raw'/>
+      <source dev='/dev/HostVG/XenGuest2'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/XenGuest2-home'/>
+      <target dev='hdb' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
+    </disk>
+    <disk type='file' device='cdrom'>
+      <driver name='qemu' type='raw'/>
+      <source file='/root/boot.iso'/>
+      <target dev='hdc' bus='ide'/>
+      <readonly/>
+      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+    <interface type='bridge'>
+      <mac address='00:16:3e:66:92:9c'/>
+      <source bridge='xenbr1'/>
+      <script path='vif-bridge'/>
+      <model type='e1000'/>
+    </interface>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'>
+      <listen type='address' address='127.0.0.1'/>
+    </graphics>
+    <video>
+      <model type='cirrus' vram='8192' heads='1' primary='yes'/>
+    </video>
+  </devices>
+</domain>

tests/xlconfigtest.c

@@ -268,6 +268,8 @@ mymain(void)
     DO_TEST("fullvirt-hpet-timer");
     DO_TEST("fullvirt-tsc-timer");
     DO_TEST("fullvirt-multi-timer");
+    DO_TEST("fullvirt-nestedhvm");
+    DO_TEST("fullvirt-nestedhvm-disabled");
 
     DO_TEST("paravirt-cmdline");
     DO_TEST_FORMAT("paravirt-cmdline-extra-root", false);