vmm: Add tpm parameter

Add an optional --tpm parameter that takes UNIX Domain
Socket from swtpm.

Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>

vmm/src/vm_config.rs

@@ -555,6 +555,11 @@ pub fn default_console() -> ConsoleConfig {
     }
 }
 
+#[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize)]
+pub struct TpmConfig {
+    pub socket: PathBuf,
+}
+
 #[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize)]
 pub struct VmConfig {
     #[serde(default)]
@@ -587,4 +592,5 @@ pub struct VmConfig {
     #[cfg(feature = "guest_debug")]
     pub gdb: bool,
     pub platform: Option<PlatformConfig>,
+    pub tpm: Option<TpmConfig>,
 }