refactor(board): move Coco initialization to the Board constructor

Signed-off-by: Changyuan Lyu <changyuanl@google.com>

Author: Lencerf

alioth/src/board/board.rs

@@ -272,6 +272,9 @@ where
             }),
             cond_var: Condvar::new(),
         };
+
+        board.coco_init()?;
+
         Ok(board)
     }
 
@@ -429,7 +432,6 @@ where
 
     fn boot_init_sync(&self, index: u16, vcpu: &mut V::Vcpu) -> Result<()> {
         let vcpus = self.vcpus.read();
-        self.coco_init(index)?;
         if index == 0 {
             self.create_ram()?;
             for (port, dev) in self.io_devs.read().iter() {

alioth/src/board/board_aarch64.rs

@@ -154,7 +154,7 @@ where
         Ok(())
     }
 
-    pub fn coco_init(&self, _id: u16) -> Result<()> {
+    pub fn coco_init(&self) -> Result<()> {
         Ok(())
     }
 

alioth/src/board/board_x86_64/board_x86_64.rs

@@ -318,16 +318,14 @@ where
         Ok(())
     }
 
-    pub fn coco_init(&self, index: u16) -> Result<()> {
-        if index != 0 {
+    pub fn coco_init(&self) -> Result<()> {
+        let Some(coco) = &self.config.coco else {
             return Ok(());
-        }
-        if let Some(coco) = &self.config.coco {
-            match coco {
-                Coco::AmdSev { policy } => self.vm.sev_launch_start(*policy)?,
-                Coco::AmdSnp { policy } => self.vm.snp_launch_start(*policy)?,
-                Coco::IntelTdx { attr } => todo!("Intel TDX {attr:?}"),
-            }
+        };
+        match coco {
+            Coco::AmdSev { policy } => self.vm.sev_launch_start(*policy)?,
+            Coco::AmdSnp { policy } => self.vm.snp_launch_start(*policy)?,
+            Coco::IntelTdx { attr } => todo!("Intel TDX {attr:?}"),
         }
         Ok(())
     }