vmm: simplify VM creation API

Create HypervisorVmConfig early and pass the
struct to VM creation API in the vmm crate. Getting
rid of multiple conditional parameter.

Signed-off-by: Muminul Islam <muislam@microsoft.com>

vmm/src/lib.rs

@@ -210,6 +210,20 @@ pub enum Error {
     #[error("Error applying landlock")]
     ApplyLandlock(#[source] LandlockError),
 }
+
+impl From<&VmConfig> for hypervisor::HypervisorVmConfig {
+    fn from(_value: &VmConfig) -> Self {
+        hypervisor::HypervisorVmConfig {
+            #[cfg(feature = "tdx")]
+            tdx_enabled: _value.platform.as_ref().map(|p| p.tdx).unwrap_or(false),
+            #[cfg(feature = "sev_snp")]
+            sev_snp_enabled: _value.is_sev_snp_enabled(),
+            #[cfg(feature = "sev_snp")]
+            mem_size: _value.memory.total_size(),
+        }
+    }
+}
+
 pub type Result<T> = result::Result<T, Error>;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -1006,12 +1020,7 @@ impl Vmm {
 
         let vm = Vm::create_hypervisor_vm(
             self.hypervisor.as_ref(),
-            #[cfg(feature = "tdx")]
-            false,
-            #[cfg(feature = "sev_snp")]
-            false,
-            #[cfg(feature = "sev_snp")]
-            config.lock().unwrap().memory.total_size(),
+            (&*self.vm_config.as_ref().unwrap().lock().unwrap()).into(),
         )
         .map_err(|e| {
             MigratableError::MigrateReceive(anyhow!(