Run logd only when debug_level is set

When debug_level is set to none, logd is not started at all.

Bug: 200914564
Test: run a VM with and without --debug full
Change-Id: Idb1ea3753067242eb0dcd53d3ae783e9e947ca32
diff --git a/microdroid/bootconfig.app_debuggable b/microdroid/bootconfig.app_debuggable
index f65d4cd..98d326a 100644
--- a/microdroid/bootconfig.app_debuggable
+++ b/microdroid/bootconfig.app_debuggable
@@ -8,3 +8,7 @@
 
 # ADB is supported but rooting is prohibited.
 androidboot.adb.enabled=1
+
+# logd is enabled
+# TODO(b/200914564) Filter only the log from the app
+androidboot.logd.enabled=1
diff --git a/microdroid/bootconfig.full_debuggable b/microdroid/bootconfig.full_debuggable
index 0d0457c..fd8a83e 100644
--- a/microdroid/bootconfig.full_debuggable
+++ b/microdroid/bootconfig.full_debuggable
@@ -9,3 +9,6 @@
 # ro.adb.secure is still 0 (see build.prop) which means that adbd is started
 # unrooted by default. To root, developer should explicitly execute `adb root`.
 androidboot.adb.enabled=1
+
+# logd is enabled
+androidboot.logd.enabled=1
diff --git a/microdroid/bootconfig.normal b/microdroid/bootconfig.normal
index f7cdfc7..9cfb55a 100644
--- a/microdroid/bootconfig.normal
+++ b/microdroid/bootconfig.normal
@@ -6,3 +6,6 @@
 
 # ADB is not enabled.
 androidboot.adb.enabled=0
+
+# logd is not enabled
+androidboot.logd.enabled=0
diff --git a/microdroid/init.rc b/microdroid/init.rc
index 078b51d..74da023 100644
--- a/microdroid/init.rc
+++ b/microdroid/init.rc
@@ -74,9 +74,11 @@
     chmod 0664 /dev/cpuset/background/tasks
     chmod 0664 /dev/cpuset/system-background/tasks
 
+on init && property:ro.boot.logd.enabled=1
     # Start logd before any other services run to ensure we capture all of their logs.
     start logd
 
+on init
     start servicemanager
 
     # TODO(b/185767624): remove hidl after full keymint support
@@ -85,7 +87,7 @@
 on init && property:ro.boot.adb.enabled=1
     start adbd
 
-on load_persist_props_action
+on load_persist_props_action && property:ro.boot.logd.enabled=1
     start logd
     start logd-reinit