[V3] AArch64: Porting of armv7l conditons to run qemu for aarch64.

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index be32c6b..86a60c9 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -305,6 +305,7 @@ 
           <ref name="hvmppc64"/>
           <ref name="hvms390"/>
           <ref name="hvmarm"/>
+          <ref name="hvmaarch64"/>
         </choice>
       </optional>
       <value>hvm</value>
@@ -432,6 +433,24 @@ 
       </optional>
     </group>
   </define>
+  <define name="hvmaarch64">
+    <group>
+      <optional>
+        <attribute name="arch">
+          <choice>
+            <value>aarch64</value>
+          </choice>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="machine">
+          <data type="string">
+            <param name="pattern">[a-zA-Z0-9_\.\-]+</param>
+          </data>
+        </attribute>
+      </optional>
+    </group>
+  </define>
   <define name="osexe">
     <element name="os">
       <element name="type">
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 4f64f87..ed182e0 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -2917,7 +2917,7 @@  virQEMUCapsSupportsChardev(virDomainDefPtr def,
         !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
         return false;
 
-    if (def->os.arch != VIR_ARCH_ARMV7L)
+    if ((def->os.arch != VIR_ARCH_ARMV7L) && (def->os.arch != VIR_ARCH_AARCH64))
         return true;
 
     /* This may not be true for all ARM machine types, but at least
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index d723dc8..2c66718 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -427,7 +427,8 @@  qemuDomainSupportsNicdev(virDomainDefPtr def,
         return false;
 
     /* non-virtio ARM nics require legacy -net nic */
-    if (def->os.arch == VIR_ARCH_ARMV7L &&
+    if (((def->os.arch == VIR_ARCH_ARMV7L) ||
+        (def->os.arch == VIR_ARCH_AARCH64)) &&
         net->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO)
         return false;
 
@@ -1340,7 +1341,8 @@  static int
 qemuDomainAssignARMVirtioMMIOAddresses(virDomainDefPtr def,
                                        virQEMUCapsPtr qemuCaps)
 {
-    if (def->os.arch == VIR_ARCH_ARMV7L &&
+    if (((def->os.arch == VIR_ARCH_ARMV7L) ||
+        (def->os.arch == VIR_ARCH_AARCH64)) &&
         (STRPREFIX(def->os.machine, "vexpress-") ||
             STREQ(def->os.machine, "virt")) &&
         virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_MMIO)) {
@@ -1872,7 +1874,7 @@  cleanup:
 
 static bool
 qemuDomainSupportsPCI(virDomainDefPtr def) {
-    if (def->os.arch != VIR_ARCH_ARMV7L)
+    if ((def->os.arch != VIR_ARCH_ARMV7L) && (def->os.arch != VIR_ARCH_AARCH64))
         return true;
 
     if (STREQ(def->os.machine, "versatilepb"))
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index e964c75..c947e2e 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -727,6 +727,10 @@  qemuDomainDefPostParse(virDomainDefPtr def,
        addDefaultUSB = false;
        addDefaultMemballoon = false;
        break;
+    case VIR_ARCH_AARCH64:
+       addDefaultUSB = false;
+       addDefaultMemballoon = false;
+       break;
 
     case VIR_ARCH_ALPHA:
     case VIR_ARCH_PPC:
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-virtio.args b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-virtio.args
new file mode 100644
index 0000000..afd6e41
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-virtio.args
@@ -0,0 +1,14 @@ 
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-aarch64 -S -M virt -m 1024 -smp 1 -nographic \
+-nodefconfig -nodefaults -monitor unix:/tmp/test-monitor,server,nowait \
+-boot c -kernel /aarch64.kernel -initrd /aarch64.initrd -append \
+'earlyprintk console=ttyAMA0,115200n8 rw root=/dev/vda rootwait' \
+-dtb /aarch64.dtb -device virtio-serial-device,id=virtio-serial0 -usb \
+-drive file=/aarch64.raw,if=none,id=drive-virtio-disk0 \
+-device virtio-blk-device,drive=drive-virtio-disk0,id=virtio-disk0 \
+-device virtio-net-device,vlan=0,id=net0,mac=52:54:00:09:a4:37 \
+-net user,vlan=0,name=hostnet0 -serial pty -chardev pty,id=charconsole1 \
+-device virtconsole,chardev=charconsole1,id=console1 \
+-device virtio-balloon-device,id=balloon0 \
+-object rng-random,id=rng0,filename=/dev/random \
+-device virtio-rng-device,rng=rng0
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-virtio.xml b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-virtio.xml
new file mode 100644
index 0000000..184b62c
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-virtio.xml
@@ -0,0 +1,45 @@ 
+<domain type="qemu">
+  <name>aarch64test</name>
+  <uuid>496d7ea8-9739-544b-4ebd-ef08be936e8b</uuid>
+  <memory>1048576</memory>
+  <currentMemory>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch="aarch64" machine="virt">hvm</type>
+    <kernel>/aarch64.kernel</kernel>
+    <initrd>/aarch64.initrd</initrd>
+    <dtb>/aarch64.dtb</dtb>
+    <cmdline>earlyprintk console=ttyAMA0,115200n8 rw root=/dev/vda rootwait</cmdline>
+  </os>
+  <features>
+    <acpi/>
+    <apic/>
+    <pae/>
+  </features>
+  <clock offset="utc"/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-aarch64</emulator>
+    <disk type='file' device='disk'>
+      <source file='/aarch64.raw'/>
+      <target dev='vda' bus='virtio'/>
+    </disk>
+    <interface type='user'>
+      <mac address='52:54:00:09:a4:37'/>
+      <model type='virtio'/>
+    </interface>
+    <console type='pty'/>
+    <console type='pty'>
+      <target type='virtio' port='0'/>
+    </console>
+    <memballoon model='virtio'/>
+    <!--
+      This actually doesn't work in practice because vexpress only has
+      4 virtio slots available, rng makes 5 -->
+    <rng model='virtio'>
+      <backend model='random'>/dev/random</backend>
+    </rng>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 847e96f..e451387 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1301,6 +1301,11 @@  mymain(void)
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE_VIRTIO_MMIO,
             QEMU_CAPS_DEVICE_VIRTIO_RNG, QEMU_CAPS_OBJECT_RNG_RANDOM);
 
+    DO_TEST("aarch64-virt-virtio",
+            QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DTB,
+            QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE_VIRTIO_MMIO,
+            QEMU_CAPS_DEVICE_VIRTIO_RNG, QEMU_CAPS_OBJECT_RNG_RANDOM);
+
     DO_TEST("kvm-pit-device", QEMU_CAPS_KVM_PIT_TICK_POLICY);
     DO_TEST("kvm-pit-delay", QEMU_CAPS_NO_KVM_PIT);
     DO_TEST("kvm-pit-device", QEMU_CAPS_NO_KVM_PIT,
diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c
index 92433ef..44e7e9d 100644
--- a/tests/testutilsqemu.c
+++ b/tests/testutilsqemu.c
@@ -175,6 +175,33 @@  error:
     return -1;
 }
 
+static int testQemuAddAARCH64Guest(virCapsPtr caps)
+{
+    static const char *machines[] = { "virt"};
+    virCapsGuestMachinePtr *capsmachines = NULL;
+    virCapsGuestPtr guest;
+
+    capsmachines = virCapabilitiesAllocMachines(machines,
+                                                ARRAY_CARDINALITY(machines));
+    if (!capsmachines)
+        goto error;
+
+    guest = virCapabilitiesAddGuest(caps, "hvm", VIR_ARCH_AARCH64,
+                                    "/usr/bin/qemu-system-aarch64", NULL,
+                                    ARRAY_CARDINALITY(machines),
+                                    capsmachines);
+    if (!guest)
+        goto error;
+
+    if (!virCapabilitiesAddGuestDomain(guest, "qemu", NULL, NULL, 0, NULL))
+        goto error;
+
+    return 0;
+
+error:
+    virCapabilitiesFreeMachines(capsmachines, ARRAY_CARDINALITY(machines));
+    return -1;
+}
 
 virCapsPtr testQemuCapsInit(void) {
     virCapsPtr caps;
@@ -303,6 +330,9 @@  virCapsPtr testQemuCapsInit(void) {
     if (testQemuAddArmGuest(caps))
         goto cleanup;
 
+    if (testQemuAddAARCH64Guest(caps))
+        goto cleanup;
+
     if (virTestGetDebug()) {
         char *caps_str;