pvh: Add integration test to validate PVH boot

Add an integration test that builds cloud-hypervisor with
the pvh_boot feature and boots a kernel built with CONFIG_PVH.

Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>

tests/integration.rs

@@ -1052,6 +1052,51 @@ mod tests {
         });
     }
 
+    #[cfg_attr(feature = "pvh_boot", test)]
+    fn test_pvh_boot() {
+        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;
+            kernel_path.push("vmlinux.pvh");
+
+            let mut child = GuestCommand::new(&guest)
+                .args(&["--cpus","boot=1"])
+                .args(&["--memory", "size=512M"])
+                .args(&["--kernel", kernel_path.to_str().unwrap()])
+                .default_disks()
+                .default_net()
+                .args(&["--cmdline", "root=PARTUUID=6fb4d1a8-6c8c-4dd7-9f7c-1fe0b9f2574c 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));
+
+            aver_eq!(tb, guest.get_cpu_count().unwrap_or_default(), 1);
+            aver!(tb, guest.get_total_memory().unwrap_or_default() > 496_000);
+            aver!(tb, guest.get_entropy().unwrap_or_default() >= 900);
+
+            #[cfg(not(feature = "mmio"))]
+            aver_eq!(
+                tb,
+                guest
+                    .ssh_command("grep -c PCI-MSI /proc/interrupts")
+                    .unwrap_or_default()
+                    .trim()
+                    .parse::<u32>()
+                    .unwrap_or_default(),
+                12
+            );
+
+            let _ = child.kill();
+            let _ = child.wait();
+            Ok(())
+        });
+    }
+
     #[test]
     fn test_bzimage_boot() {
         test_block!(tb, "", {