ci: Add integration test for virtio-iommu

Simply test the guest can find the PCI device corresponding to the
virtio-iommu device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

src/main.rs

@@ -2742,4 +2742,56 @@ mod tests {
             Ok(())
         });
     }
+
+    #[cfg_attr(not(feature = "mmio"), test)]
+    fn test_virtio_iommu() {
+        test_block!(tb, "", {
+            let mut clear = ClearDiskConfig::new();
+            let guest = Guest::new(&mut clear);
+            let mut workload_path = dirs::home_dir().unwrap();
+            workload_path.push("workloads");
+
+            let mut kernel_path = workload_path.clone();
+            kernel_path.push("bzImage");
+
+            let mut child = Command::new("target/debug/cloud-hypervisor")
+                .args(&["--cpus", "1"])
+                .args(&["--memory", "size=512M"])
+                .args(&["--kernel", kernel_path.to_str().unwrap()])
+                .args(&[
+                    "--disk",
+                    format!(
+                        "path={},iommu=on",
+                        guest.disk_config.disk(DiskType::OperatingSystem).unwrap()
+                    )
+                    .as_str(),
+                    format!(
+                        "path={},iommu=on",
+                        guest.disk_config.disk(DiskType::CloudInit).unwrap()
+                    )
+                    .as_str(),
+                ])
+                .args(&["--net", guest.default_net_string().as_str()])
+                .args(&["--cmdline", "root=PARTUUID=19866ecd-ecc4-4ef8-b313-09a92260ef9b console=tty0 console=ttyS0,115200n8 console=hvc0 quiet init=/usr/lib/systemd/systemd-bootchart initcall_debug tsc=reliable no_timer_check noreplace-smp cryptomgr.notests rootfstype=ext4,btrfs,xfs kvm-intel.nested=1 rw"])
+                .spawn()
+                .unwrap();
+
+            thread::sleep(std::time::Duration::new(20, 0));
+
+            #[cfg(not(feature = "mmio"))]
+            aver!(
+                tb,
+                guest
+                    .does_device_vendor_pair_match("0x1057", "0x1af4")
+                    .unwrap_or_default()
+            );
+
+            guest.ssh_command("sudo shutdown -h now")?;
+            thread::sleep(std::time::Duration::new(10, 0));
+            let _ = child.kill();
+            let _ = child.wait();
+
+            Ok(())
+        });
+    }
 }