tests: Add VFIO integration test

The VFIO integration test first boots a QEMU guest and then assigns the
QEMU virtio-pci networking device into a nested cloud-hypervisor guest.
We then check that we can ssh into the nested guest and verify that it's
running with the right kernel command line.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

test_data/cloud-init/openstack/latest/user_data

@@ -6,7 +6,7 @@ users:
       - ALL=(ALL) NOPASSWD:ALL
 write_files:
   -
-    path: /etc/systemd/network/00-static.network
+    path: /etc/systemd/network/00-static-l1.network
     permissions: 0644
     content: |
         [Match]
@@ -15,3 +15,42 @@ write_files:
         [Network]
         Address=192.168.2.2/24
         Gateway=192.168.2.1
+
+  -
+    path: /etc/systemd/network/00-static-l2.network
+    permissions: 0644
+    content: |
+        [Match]
+        MACAddress=de:ad:be:ef:12:34
+
+        [Network]
+        Address=192.168.2.3/24
+        Gateway=192.168.2.1
+
+  -
+    path: /etc/systemd/system/vfio.service
+    permissions: 0644
+    content: |
+        [Unit]
+        Description=VFIO test systemd service
+
+        [Service]
+        Type=simple
+        ExecStart=/bin/bash /usr/bin/cloud-hypervisor-vfio.sh
+
+        [Install]
+        WantedBy=multi-user.target
+
+  -
+    path: /usr/bin/cloud-hypervisor-vfio.sh
+    permissions: 0755
+    content: |
+        #!/bin/bash
+
+        mount -t 9p -o trans=virtio cloud_hypervisor /mnt -oversion=9p2000.L,posixacl,cache=loose
+        modprobe vfio_iommu_type1 allow_unsafe_interrupts
+        modprobe vfio_pci
+        bash -c "echo 0000:00:03.0 > /sys/bus/pci/devices/0000\:00\:03.0/driver/unbind"
+        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
+
+        /mnt/cloud-hypervisor --console off --serial tty --kernel /mnt/vmlinux --cmdline "console=ttyS0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda2 VFIOTAG" --disk /mnt/clear-29810-cloud.img /mnt/cloudinit.img --cpus 1 --memory size=512M --rng --device /sys/bus/pci/devices/0000:00:03.0/