provide testing for free-page-reporting feature in QEMU

This provides basic testing for the free-page-reporting feature that is
introduced in qemu 5.1.

Signed-off-by: Nico Pache <npache@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

tests/qemuxml2argvdata/virtio-options-memballoon-freepage-reporting.err

@@ -0,0 +1 @@
+unsupported configuration: free-page-reporting is not supported by this QEMU binary

tests/qemuxml2argvdata/virtio-options-memballoon-freepage-reporting.x86_64-latest.args

@@ -0,0 +1,36 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-cpu qemu64 \
+-m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2,\
+free-page-reporting=on \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
+resourcecontrol=deny \
+-msg timestamp=on

tests/qemuxml2argvdata/virtio-options-memballoon-freepage-reporting.xml

@@ -0,0 +1,22 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='pci' index='0' model='pci-root'/>
+    <memballoon model='virtio' free-page-reporting='on'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -3195,6 +3195,7 @@ mymain(void)
     DO_TEST_CAPS_LATEST("virtio-options-fs-packed");
     DO_TEST_CAPS_LATEST("virtio-options-input-packed");
     DO_TEST_CAPS_LATEST("virtio-options-memballoon-packed");
+    DO_TEST_CAPS_LATEST("virtio-options-memballoon-freepage-reporting");
     DO_TEST_CAPS_LATEST("virtio-options-net-packed");
     DO_TEST_CAPS_LATEST("virtio-options-rng-packed");
     DO_TEST_CAPS_LATEST("virtio-options-video-packed");
@@ -3232,6 +3233,7 @@ mymain(void)
     DO_TEST_PARSE_ERROR("virtio-options-input-packed", QEMU_CAPS_VIRTIO_MOUSE,
                         QEMU_CAPS_VIRTIO_KEYBOARD);
     DO_TEST_PARSE_ERROR("virtio-options-memballoon-packed", NONE);
+    DO_TEST_PARSE_ERROR("virtio-options-memballoon-freepage-reporting", NONE);
     DO_TEST_PARSE_ERROR("virtio-options-net-packed", NONE);
     DO_TEST_PARSE_ERROR("virtio-options-rng-packed", QEMU_CAPS_DEVICE_VIRTIO_RNG,
                         QEMU_CAPS_OBJECT_RNG_RANDOM);

tests/qemuxml2xmloutdata/virtio-options-memballoon-freepage-reporting.xml

@@ -0,0 +1,22 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='pci' index='0' model='pci-root'/>
+    <memballoon model='virtio' free-page-reporting='on'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>