Add rules for reading VM DTBO by vfio_handler

Bug: 291191362
Test: m

Merged-In: I0b38feb30382c5e6876e3e7809ddb5cf9034e4fd
Change-Id: I0b38feb30382c5e6876e3e7809ddb5cf9034e4fd
diff --git a/private/compat/34.0/34.0.ignore.cil b/private/compat/34.0/34.0.ignore.cil
index 7558604..36d3aaa 100644
--- a/private/compat/34.0/34.0.ignore.cil
+++ b/private/compat/34.0/34.0.ignore.cil
@@ -6,6 +6,7 @@
 (typeattributeset new_objects
   ( new_objects
     archive_service
+    dtbo_block_device
     ota_build_prop
     snapuserd_log_data_file
     hal_threadnetwork_service
diff --git a/private/vfio_handler.te b/private/vfio_handler.te
index 2a0bd37..3bed3c6 100644
--- a/private/vfio_handler.te
+++ b/private/vfio_handler.te
@@ -27,5 +27,9 @@
 # vfio_handler can only use fd from virtualizationmanager, and can't open files itself
 neverallow vfio_handler virtualizationservice_data_file:file { open create };
 
+# Allow vfio_handler to search /dev/block for accessing dtbo.img
+allow vfio_handler block_device:dir search;
+allow vfio_handler dtbo_block_device:blk_file r_file_perms;
+
 # Only vfio_handler can add vfio_handler_service
 neverallow { domain -vfio_handler } vfio_handler_service:service_manager add;