test: enable entropy device for boot tests

Enable entropy device during boot time tests to check for entropy
effects in the boot time of microVM.

Signed-off-by: Babis Chalios <[email protected]>

Author: bchalios

tests/framework/microvm.py

@@ -633,6 +633,7 @@ def basic_config(
         track_dirty_pages: bool = False,
         rootfs_io_engine=None,
         cpu_template: Optional[str] = None,
+        enable_entropy_device=False,
     ):
         """Shortcut for quickly configuring a microVM.
 
@@ -690,6 +691,9 @@ def basic_config(
                 io_engine=rootfs_io_engine,
             )
 
+        if enable_entropy_device:
+            self.enable_entropy_device()
+
     def add_drive(
         self,
         drive_id,
@@ -876,6 +880,10 @@ def restore_from_snapshot(
         )
         return True
 
+    def enable_entropy_device(self):
+        """Enable entropy device for microVM"""
+        self.api.entropy.put()
+
     def restore_from_path(self, snap_dir: Path, **kwargs):
         """Restore snapshot from a path"""
         return self.restore_from_snapshot(Snapshot.load_from(snap_dir), **kwargs)

tests/integration_tests/performance/test_boottime.py

@@ -129,6 +129,7 @@ def _configure_and_run_vm(microvm, network=False, initrd=False):
         "vcpu_count": 1,
         "mem_size_mib": 128,
         "boot_args": DEFAULT_BOOT_ARGS + " init=/usr/local/bin/init",
+        "enable_entropy_device": True,
     }
     if initrd:
         config["add_root_device"] = False
@@ -186,6 +187,7 @@ def test_boottime(
             vcpu_count=vcpu_count,
             mem_size_mib=mem_size_mib,
             boot_args=DEFAULT_BOOT_ARGS + " init=/usr/local/bin/init",
+            enable_entropy_device=True,
         )
         vm.add_net_iface()
         vm.start()