diff --git a/misc/acrn-config/board_config/board_c.py b/misc/acrn-config/board_config/board_c.py
index 93b625567..3ab009f13 100644
--- a/misc/acrn-config/board_config/board_c.py
+++ b/misc/acrn-config/board_config/board_c.py
@@ -63,8 +63,7 @@ def gen_dmar_structure(config):
         print("\t\t.segment       = DRHD{}_SEGMENT,".format(i_drhd_cnt), file=config)
         print("\t\t.flags         = DRHD{}_FLAGS,".format(i_drhd_cnt), file=config)
         print("\t\t.reg_base_addr = DRHD{}_REG_BASE,".format(i_drhd_cnt), file=config)
-        if dev_cnt != 0:
-            print("\t\t.ignore        = DRHD{}_IGNORE,".format(i_drhd_cnt), file=config)
+        print("\t\t.ignore        = DRHD{}_IGNORE,".format(i_drhd_cnt), file=config)
         print("\t\t.devices       = drhd{}_dev_scope".format(i_drhd_cnt), file=config)
         print("\t},", file=config)
 
diff --git a/misc/acrn-config/target/dmar.py b/misc/acrn-config/target/dmar.py
index c9c1cf7dd..a5c10e9c1 100644
--- a/misc/acrn-config/target/dmar.py
+++ b/misc/acrn-config/target/dmar.py
@@ -244,6 +244,8 @@ def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, drhd_cnt):
     :param dmar_hw_list: it is a class to describe hardware scope in DMAR table
     :param drhd_cnt: it is a counter to calculate the DRHD in DMAR table
     """
+    # initialize DRHDx_IGNORE to false
+    dmar_hw_list.hw_ignore[drhd_cnt] = 'false'
     # path offset is in end of device spcope
     dmar_tbl.path_offset = dmar_tbl.dev_scope_offset + ctypes.sizeof(DmarDevScope)
     n_cnt = (dmar_tbl.dmar_dev_scope.scope_length - ctypes.sizeof(DmarDevScope)) // 2
@@ -259,8 +261,6 @@ def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, drhd_cnt):
         if ((dmar_tbl.dmar_drhd.segment << 16) | (
                 dmar_tbl.dmar_dev_scope.bus << 8) | tmp_pdf.path) == CONFIG_GPU_SBDF:
             dmar_hw_list.hw_ignore[drhd_cnt] = 'true'
-        else:
-            dmar_hw_list.hw_ignore[drhd_cnt] = 'false'
 
         dmar_tbl.path_offset += ctypes.sizeof(DevScopePath)
         n_cnt -= 1