runtime-rs: support qemu in VirtContainer

Added registration of qemu config plugin and support for creating Qemu
Hypervisor instance.

Signed-off-by: Pavel Mores <pmores@redhat.com>

src/runtime-rs/crates/runtimes/virt_container/src/lib.rs

@@ -21,7 +21,10 @@ use anyhow::{anyhow, Context, Result};
 use async_trait::async_trait;
 use common::{message::Message, RuntimeHandler, RuntimeInstance};
 use hypervisor::{dragonball::Dragonball, Hypervisor, HYPERVISOR_DRAGONBALL};
-use kata_types::config::{hypervisor::register_hypervisor_plugin, DragonballConfig, TomlConfig};
+use hypervisor::{qemu::Qemu, HYPERVISOR_QEMU};
+use kata_types::config::{
+    hypervisor::register_hypervisor_plugin, DragonballConfig, QemuConfig, TomlConfig,
+};
 use resource::ResourceManager;
 use sandbox::VIRTCONTAINER;
 use tokio::sync::mpsc::Sender;
@@ -36,6 +39,8 @@ impl RuntimeHandler for VirtContainer {
         // register
         let dragonball_config = Arc::new(DragonballConfig::new());
         register_hypervisor_plugin("dragonball", dragonball_config);
+        let qemu_config = Arc::new(QemuConfig::new());
+        register_hypervisor_plugin("qemu", qemu_config);
         Ok(())
     }
 
@@ -106,6 +111,13 @@ async fn new_hypervisor(toml_config: &TomlConfig) -> Result<Arc<dyn Hypervisor>>
                 .await;
             Ok(Arc::new(hypervisor))
         }
+        HYPERVISOR_QEMU => {
+            let mut hypervisor = Qemu::new();
+            hypervisor
+                .set_hypervisor_config(hypervisor_config.clone())
+                .await;
+            Ok(Arc::new(hypervisor))
+        }
         _ => Err(anyhow!("Unsupported hypervisor {}", &hypervisor_name)),
     }
 }
@@ -149,4 +161,27 @@ agent_name="kata"
         let res = new_agent(&toml_config);
         assert!(res.is_ok());
     }
+
+    #[tokio::test]
+    async fn test_new_hypervisor() {
+        VirtContainer::init().unwrap();
+
+        let toml_config = {
+            let config_content = r#"
+[hypervisor.qemu]
+path = "/bin/echo"
+kernel = "/bin/echo"
+image = "/bin/echo"
+firmware = ""
+
+[runtime]
+hypervisor_name="qemu"
+"#;
+            TomlConfig::load(config_content).map_err(|e| anyhow!("can not load config toml: {}", e))
+        }
+        .unwrap();
+
+        let res = new_hypervisor(&toml_config).await;
+        assert!(res.is_ok());
+    }
 }