diff --git a/misc/acrn-config/board_config/acpi_platform_h.py b/misc/acrn-config/board_config/acpi_platform_h.py
index c5dbf16c9..351b22c06 100644
--- a/misc/acrn-config/board_config/acpi_platform_h.py
+++ b/misc/acrn-config/board_config/acpi_platform_h.py
@@ -31,7 +31,12 @@ class OverridAccessSize():
 
 
 def multi_parser(line, s_line, pm_ac_sz, config):
-    """Multi parser the line"""
+    """Multi parser the line
+    :param line: it is a line read from default_acpi_info.h
+    :param s_line: it is a line read from board information file
+    :param pm_ac_sz: it is a class for access size which would be override
+    :param config: it is a file pointer to write acpi information
+    """
     addr = ['PM1A_EVT_ADDRESS', 'PM1B_EVT_ADDRESS', 'PM1A_CNT_ADDRESS', 'PM1B_CNT_ADDRESS']
     space_id = ['PM1A_EVT_SPACE_ID', 'PM1B_EVT_SPACE_ID', 'PM1A_CNT_SPACE_ID', 'PM1B_CNT_SPACE_ID']
 
@@ -71,7 +76,12 @@ def multi_parser(line, s_line, pm_ac_sz, config):
 
 
 def multi_info_parser(config, default_platform, msg_s, msg_e):
-    """Parser multi information"""
+    """Parser multi information
+    :param config: it is a file pointer to write acpi information
+    :param default_platform: it is the default_acpi_info.h in acrn-hypervisor
+    :param msg_s: it is a pattern of key stings what start to match from board information
+    :param msg_e: it is a pattern of key stings what end to match from board information
+    """
     write_direct = ['PM1A_EVT_ACCESS_SIZE', 'PM1A_EVT_ADDRESS', 'PM1A_CNT_ADDRESS']
 
     pm_ac_sz = OverridAccessSize()
@@ -99,7 +109,11 @@ def multi_info_parser(config, default_platform, msg_s, msg_e):
 
 
 def write_direct_info_parser(config, msg_s, msg_e):
-    """Direct to write"""
+    """Direct to write
+    :param config: it is a file pointer to write acpi information
+    :param msg_s: it is a pattern of key stings what start to match from board information
+    :param msg_e: it is a pattern of key stings what end to match from board information
+    """
     vector_lines = board_cfg_lib.get_info(board_cfg_lib.BOARD_INFO_FILE, msg_s, msg_e)
 
     for vector in vector_lines:
@@ -109,7 +123,9 @@ def write_direct_info_parser(config, msg_s, msg_e):
 
 
 def drhd_info_parser(config):
-    """Parser DRHD information"""
+    """Parser DRHD information
+    :param config: it is a file pointer to write acpi information
+    """
     prev_num = 0
 
     drhd_lines = board_cfg_lib.get_info(
@@ -133,7 +149,10 @@ def drhd_info_parser(config):
 
 
 def platform_info_parser(config, default_platform):
-    """Parser ACPI information"""
+    """Parser ACPI information
+    :param config: it is a file pointer to write acpi information
+    :param default_platform: it is the default_acpi_info.h in acrn-hypervisor
+    """
     print("\n/* pm sstate data */", file=config)
     multi_info_parser(config, default_platform, "<PM_INFO>", "</PM_INFO>")
     multi_info_parser(config, default_platform, "<S3_INFO>", "</S3_INFO>")
@@ -146,7 +165,10 @@ def platform_info_parser(config, default_platform):
 
 
 def generate_file(config, default_platform):
-    """write board_name_acpi_info.h"""
+    """write board_name_acpi_info.h
+    :param config: it is a file pointer to write acpi information
+    :param default_platform: it is the default_acpi_info.h in acrn-hypervisor
+    """
     print("{}".format(board_cfg_lib.HEADER_LICENSE), file=config)
 
     print("{}".format(PLATFORM_HEADER), file=config)
diff --git a/misc/acrn-config/board_config/board_c.py b/misc/acrn-config/board_config/board_c.py
index f55ace01e..07c66a55c 100644
--- a/misc/acrn-config/board_config/board_c.py
+++ b/misc/acrn-config/board_config/board_c.py
@@ -26,7 +26,9 @@ def clos_info_parser():
 
 
 def gen_cat(config):
-    """Get CAT information"""
+    """Get CAT information
+    :param config: it is a file pointer of board information for writing to
+    """
     (cache_support, clos_max) = clos_info_parser()
 
     print("\n#include <board.h>", file=config)
@@ -48,7 +50,8 @@ def gen_cat(config):
             elif cache_support == "L3":
                 print("\t\t.msr_index = {0}U,".format(hex(0x00000C90+i_cnt)), file=config)
             else:
-                board_cfg_lib.print_red("The input of board_info.txt was corrupted!")
+                board_cfg_lib.print_red("The input of {} was corrupted!".format(
+                    board_cfg_lib.BOARD_INFO_FILE))
                 sys.exit(1)
             print("\t},", file=config)
 
@@ -61,7 +64,9 @@ def gen_cat(config):
 
 
 def gen_px_cx(config):
-    """Get Px/Cx and store them to board.c"""
+    """Get Px/Cx and store them to board.c
+    :param config: it is a file pointer of board information for writing to
+    """
     cpu_brand_lines = board_cfg_lib.get_info(
         board_cfg_lib.BOARD_INFO_FILE, "<CPU_BRAND>", "</CPU_BRAND>")
     cx_lines = board_cfg_lib.get_info(board_cfg_lib.BOARD_INFO_FILE, "<CX_INFO>", "</CX_INFO>")
@@ -92,7 +97,9 @@ def gen_px_cx(config):
 
 
 def generate_file(config):
-    """Start to generate board.c"""
+    """Start to generate board.c
+    :param config: it is a file pointer of board information for writing to
+    """
     print("{0}".format(board_cfg_lib.HEADER_LICENSE), file=config)
 
     # insert bios info into board.c
diff --git a/misc/acrn-config/board_config/board_cfg_gen.py b/misc/acrn-config/board_config/board_cfg_gen.py
index f18f5f52c..0eeb70091 100755
--- a/misc/acrn-config/board_config/board_cfg_gen.py
+++ b/misc/acrn-config/board_config/board_cfg_gen.py
@@ -54,7 +54,10 @@ def prepare():
 
 
 def gen_patch(srcs_list, board_name):
-    """Generate patch and apply to local source code"""
+    """Generate patch and apply to local source code
+    :param srcs_list: it is a list what contains source files
+    :param board_name: board name
+    """
     changes = ' '.join(srcs_list)
     git_add = "git add {}".format(changes)
     subprocess.call(git_add, shell=True, stdout=subprocess.PIPE,
@@ -67,7 +70,9 @@ def gen_patch(srcs_list, board_name):
 
 
 def main(board_info_file):
-    """This is main function to start generate source code related with board"""
+    """This is main function to start generate source code related with board
+    :param board_info_file: it is a file what contains board information for script to read from
+    """
     board = ''
     config_srcs = []
     config_dirs = []
@@ -101,7 +106,7 @@ def main(board_info_file):
     with open(config_platform, 'w+') as config:
         acpi_platform_h.generate_file(config, ACRN_DEFAULT_PLATFORM)
 
-    # move changes to patch, and applay to the source code
+    # move changes to patch, and apply to the source code
     gen_patch(config_srcs, board)
 
     if board not in BOARD_NAMES:
@@ -131,7 +136,6 @@ if __name__ == '__main__':
         board_cfg_lib.print_red("{} is not exist!".format(BOARD_INFO_FILE))
         sys.exit(1)
 
-    # board_info.txt will be override
     board_cfg_lib.BOARD_INFO_FILE = BOARD_INFO_FILE
 
     main(BOARD_INFO_FILE)
diff --git a/misc/acrn-config/board_config/board_cfg_lib.py b/misc/acrn-config/board_config/board_cfg_lib.py
index 0a3a76133..9c884ae13 100644
--- a/misc/acrn-config/board_config/board_cfg_lib.py
+++ b/misc/acrn-config/board_config/board_cfg_lib.py
@@ -28,7 +28,10 @@ HEADER_LICENSE = open_license() + "\n"
 
 
 def print_yel(msg, warn=False):
-    """Print the message with color of yellow"""
+    """Print the message with color of yellow
+    :param msg: the stings which will be output to STDOUT
+    :param warn: the condition if needs to be output the color of yellow with 'Warning'
+    """
     if warn:
         print("\033[1;33mWarning\033[0m:"+msg)
     else:
@@ -36,7 +39,10 @@ def print_yel(msg, warn=False):
 
 
 def print_red(msg, err=False):
-    """Print the message with color of red"""
+    """Print the message with color of red
+    :param msg: the stings which will be output to STDOUT
+    :param err: the condition if needs to be output the color of red with 'Error'
+    """
     if err:
         print("\033[1;31mError\033[0m:"+msg)
     else:
@@ -44,7 +50,9 @@ def print_red(msg, err=False):
 
 
 def get_board_name(board_info):
-    """Get board name"""
+    """Get board name from board.xml at fist line
+    :param board_info: it is a file what contains board information for script to read from
+    """
     with open(board_info, 'rt') as f_board:
         line = f_board.readline()
         if not "board=" in line:
@@ -56,7 +64,11 @@ def get_board_name(board_info):
 
 
 def get_info(board_info, msg_s, msg_e):
-    """Get information which specify by argument"""
+    """Get information which specify by argument
+    :param board_info: it is a file what contains board information for script to read from
+    :param msg_s: it is a pattern of key stings what start to match from board information
+    :param msg_e: it is a pattern of key stings what end to match from board information
+    """
     info_start = False
     info_end = False
     info_lines = []
@@ -93,7 +105,9 @@ def get_info(board_info, msg_s, msg_e):
 
 
 def handle_bios_info(config):
-    """Handle bios information"""
+    """Handle bios information
+    :param config: it is a file pointer of bios information for writing to
+    """
     bios_lines = get_info(BOARD_INFO_FILE, "<BIOS_INFO>", "</BIOS_INFO>")
     board_lines = get_info(BOARD_INFO_FILE, "<BASE_BOARD_INFO>", "</BASE_BOARD_INFO>")
     print("/*", file=config)
@@ -116,9 +130,9 @@ def handle_bios_info(config):
 
             i_cnt += 1
 
-            for mics_info in bios_board_info:
-                if mics_info == " ".join(line.split()[0:1]) or mics_info == \
-                        " ".join(line.split()[0:2]) or mics_info == " ".join(line.split()[0:3]):
+            for misc_info in bios_board_info:
+                if misc_info == " ".join(line.split()[0:1]) or misc_info == \
+                        " ".join(line.split()[0:2]) or misc_info == " ".join(line.split()[0:3]):
                     print(" * {0}".format(line.strip()), file=config)
 
     print(" */", file=config)
diff --git a/misc/acrn-config/board_config/pci_devices_h.py b/misc/acrn-config/board_config/pci_devices_h.py
index 0ebedaf5b..4bd0999e2 100644
--- a/misc/acrn-config/board_config/pci_devices_h.py
+++ b/misc/acrn-config/board_config/pci_devices_h.py
@@ -68,7 +68,12 @@ def parser_pci():
 
 
 def write_pbdf(i_cnt, bdf, subname, config):
-    """Parser and generate pbdf"""
+    """Parser and generate pbdf
+    :param i_cnt: the number of pci devices have the same PCI subname
+    :param bdf: it is a string what contains BDF
+    :param subname: it is a string belong to PIC subname
+    :param config: it is a file pointer of pci information for writing to
+    """
     # if there is only one host bridge, then will discard the index of suffix
     if i_cnt == 0 and subname.upper() == "HOST BRIDGE":
         tmp_sub_name = "_".join(subname.split()).upper()
@@ -84,7 +89,11 @@ def write_pbdf(i_cnt, bdf, subname, config):
 
 
 def write_vbar(bdf, pci_bar_dic, config):
-    """Parser and generate vbar"""
+    """Parser and generate vbar
+    :param bdf: it is a string what contains BDF
+    :param pci_bar_dic: it is a dictionary of pci vbar for those BDF
+    :param config: it is a file pointer of pci information for writing to
+    """
     tail = 0
     align = ' ' * 48
     if bdf in pci_bar_dic.keys():
@@ -110,7 +119,9 @@ def write_vbar(bdf, pci_bar_dic, config):
 
 
 def generate_file(config):
-    """Get PCI device and generate pci_devices.h"""
+    """Get PCI device and generate pci_devices.h
+    :param config: it is a file pointer of pci information for writing to
+    """
 
     # write the license into pci
     print("{0}".format(board_cfg_lib.HEADER_LICENSE), file=config)
diff --git a/misc/acrn-config/target/acpi.py b/misc/acrn-config/target/acpi.py
index 40843fc51..d6f4d69ee 100644
--- a/misc/acrn-config/target/acpi.py
+++ b/misc/acrn-config/target/acpi.py
@@ -123,32 +123,43 @@ PackedCx = GasType
 
 
 def store_cpu_info(sysnode, config):
-    """This will get CPU information from /proc/cpuifo"""
+    """This will get CPU information
+    :param sysnode: the path to get cpu information, like: /proc/cpuifo
+    :param config: file pointer that opened for writing board config information
+    """
     with open(sysnode, 'r') as f_node:
         line = f_node.readline()
         while line:
             if len(line.split(':')) >= 2:
                 if line.split(':')[0].strip() == "model name":
                     model_name = line.split(':')[1].strip()
-                    print('\t\t"{0}"'.format(model_name), file=config)
+                    print('\t"{0}"'.format(model_name), file=config)
                     break
             line = f_node.readline()
 
 
-def write_reset_reg(space_id, rst_reg_addr, rst_reg_space_id, rst_reg_val, config):
-    """Write reset register info"""
+def write_reset_reg(rst_reg_addr, rst_reg_space_id, rst_reg_val, config):
+    """Write reset register info
+    :param rst_reg_addr: reset register address
+    :param rst_reg_space_id: reset register space id
+    :param rst_reg_val: reset register value
+    :param config: file pointer that opened for writing board config information
+    """
     print("\t{0}".format("<RESET_REGISTER_INFO>"), file=config)
     print("\t#define RESET_REGISTER_ADDRESS  0x{:0>2X}UL".format(
         rst_reg_addr), file=config)
     print("\t#define RESET_REGISTER_SPACE_ID {0}".format(
-        space_id[rst_reg_space_id]), file=config)
+        SPACE_ID[rst_reg_space_id]), file=config)
     print("\t#define RESET_REGISTER_VALUE    {0}U".format(
         rst_reg_val), file=config)
     print("\t{0}\n".format("</RESET_REGISTER_INFO>"), file=config)
 
 
 def get_vector_reset(sysnode, config):
-    """This will get reset reg value"""
+    """This will get reset register value
+    :param sysnode: the system node of Px power state, like:/sys/firmware/acpi/tables/FACP
+    :param config: file pointer that opened for writing board config information
+    """
     reset_reg = ResetReg()
     for key, offset in FACP_OFF.items():
         with open(sysnode, 'rb') as f_node:
@@ -171,12 +182,15 @@ def get_vector_reset(sysnode, config):
                 packed_data = f_node.read(1)
                 reset_reg.reset_reg_val = hex(packed_data[0])
 
-    write_reset_reg(SPACE_ID, reset_reg.reset_reg_addr, reset_reg.reset_reg_space_id,
+    write_reset_reg(reset_reg.reset_reg_addr, reset_reg.reset_reg_space_id,
                     reset_reg.reset_reg_val, config)
 
 
 def read_pm_sstate(sysnode, config):
-    """This will read Px state of power"""
+    """This will read Px state of power
+    :param sysnode: the system node of Px power state, like:/sys/firmware/acpi/tables/FACP
+    :param config: file pointer that opened for writing board config information
+    """
     get_vector_reset(sysnode, config)
     print("\t{0}".format("<PM_INFO>"), file=config)
     for key, offset in FACP_OFF.items():
@@ -238,7 +252,10 @@ def read_pm_sstate(sysnode, config):
 
 
 def if_sx_name(sx_name, f_node):
-    """If sx name in this field"""
+    """If sx name in this field
+    :param sx_name: Sx name in DSDT of apci table, like _s3_, _s5_
+    :param f_node: f_node: file pointer that opened for reading sx from
+    """
     need_break = need_continue = 0
     name_buf = f_node.read(4)
     if not name_buf:
@@ -260,7 +277,10 @@ def if_sx_name(sx_name, f_node):
 
 
 def read_sx_locate(sx_name, f_node):
-    """Read the location of sx"""
+    """Read the location of sx
+    :param sx_name: Sx name in DSDT of apci table, like _s3_, _s5_
+    :param f_node: file pointer that opened for sx reading from
+    """
     need_continue = need_break = pkg_len = 0
 
     (need_break, need_continue) = if_sx_name(sx_name, f_node)
@@ -285,7 +305,10 @@ def read_sx_locate(sx_name, f_node):
 
 
 def decode_sx_pkg(pkg_len, f_node):
-    """Parser and decode the sx pkg"""
+    """Parser and decode the sx pkg
+    :param pkg_len: the length of sx package read from f_node
+    :param f_node: file pointer that opened for sx reading from
+    """
     pkg_val_pm1a = pkg_val_pm1b = pkg_val_resv = need_break = 0
     pkg_buf = f_node.read(int.from_bytes(pkg_len, 'little'))
     if hex(pkg_buf[1]) == ACPI_OP['AML_ZERO_OP'] or \
@@ -321,7 +344,11 @@ def decode_sx_pkg(pkg_len, f_node):
 
 
 def read_pm_sdata(sysnode, sx_name, config):
-    """This will read pm Sx state of power"""
+    """This will read pm Sx state of power
+    :param sysnode: the system node of Sx power state, like:/sys/firmware/acpi/tables/DSDT
+    :param sx_name: Sx name in DSDT of apci table, like _s3_, _s5_
+    :param config: file pointer that opened for writing board config information
+    """
     with open(sysnode, 'rb') as f_node:
         while True:
             inc = f_node.read(1)
@@ -368,7 +395,11 @@ def read_pm_sdata(sysnode, sx_name, config):
 
 
 def store_cx_data(sysnode1, sysnode2, config):
-    """This will get Cx data of power and store it to PackedCx"""
+    """This will get Cx data of power and store it to PackedCx
+    :param sysnode1: the path of cx power state driver
+    :param sysnode2: the path of cpuidle
+    :param config: file pointer that opened for writing board config information
+    """
     i = 0
     state_cpus = {}
     with open(sysnode1, 'r') as acpi_idle:
@@ -394,6 +425,7 @@ def store_cx_data(sysnode1, sysnode2, config):
     acpi_hw_type = ['HLT', 'MWAIT', 'IOPORT']
 
     cx_state = defaultdict(dict)
+    c_cnt = 1
     for state in state_cpus:
         i += 1
         for item in cpu_state:
@@ -420,17 +452,21 @@ def store_cx_data(sysnode1, sysnode2, config):
             PackedCx.bit_offset_8b = 0
             PackedCx.access_size_8b = 0
             PackedCx.address_64b = cx_state[state][cpu_state[0]].split()[2]
-        print("\t\t{{{{{}, 0x{:0>2X}U, 0x{:0>2X}U, 0x{:0>2X}U, ".format(
+        print("\t{{{{{}, 0x{:0>2X}U, 0x{:0>2X}U, 0x{:0>2X}U, ".format(
             PackedCx.space_id_8b, PackedCx.bit_width_8b, PackedCx.bit_offset_8b,
             PackedCx.access_size_8b), file=config, end="")
-        print("0x{:0>2X}UL}}, 0x{:0>2X}U, 0x{:0>2X}U, 0x{:0>2X}U}},".format(
+        print("0x{:0>2X}UL}}, 0x{:0>2X}U, 0x{:0>2X}U, 0x{:0>2X}U}},\t/* C{} */".format(
             int(str(PackedCx.address_64b), 16),
             cx_state[state]['type'], int(cx_state[state][cpu_state[1]]),
-            int(cx_state[state][cpu_state[2]])), file=config)
+            int(cx_state[state][cpu_state[2]]), c_cnt), file=config)
+        c_cnt += 1
 
 
 def store_px_data(sysnode, config):
-    """This will get Px data of power and store it to px data"""
+    """This will get Px data of power and store it to px data
+    :param sysnode: the path of system power state, such as: /sys/devices/system/cpu/
+    :param config: file pointer that opened for writing board config information
+    """
     px_tmp = PxPkg()
     px_data = {}
     with open(sysnode+'cpu0/cpufreq/scaling_driver', 'r') as f_node:
@@ -483,47 +519,51 @@ def store_px_data(sysnode, config):
         px_tmp.control = ctl_state
         px_tmp.status = ctl_state
         px_data[freq] = px_tmp
-        print("\t\t{{0x{:0>2X}UL, 0x{:0>2X}UL, 0x{:0>2X}UL, ".format(
+        print("\t{{0x{:0>2X}UL, 0x{:0>2X}UL, 0x{:0>2X}UL, ".format(
             px_data[freq].core_freq, px_data[freq].power,
             px_data[freq].trans_latency), file=config, end="")
-        print("0x{:0>2X}UL, 0x{:0>6X}UL, 0x{:0>6X}UL}}, /* P{} */".format(
+        print("0x{:0>2X}UL, 0x{:0>6X}UL, 0x{:0>6X}UL}},\t/* P{} */".format(
             px_data[freq].bus_latency, px_data[freq].control,
             px_data[freq].status, p_cnt), file=config)
 
         p_cnt += 1
 
 
-def gen_acpi_info(board_fp):
-    """This will parser the sys node form SYS_PATH and generate ACPI info"""
-    read_pm_sstate(SYS_PATH[1] + 'FACP', board_fp)
+def gen_acpi_info(config):
+    """This will parser the sys node form SYS_PATH and generate ACPI info
+    :param config: file pointer that opened for writing board config information
+    """
+    read_pm_sstate(SYS_PATH[1] + 'FACP', config)
 
-    print("{0}".format("\t<S3_INFO>"), file=board_fp)
-    read_pm_sdata(SYS_PATH[1] + 'DSDT', '_S3_', board_fp)
-    print("{0}".format("\t</S3_INFO>\n"), file=board_fp)
+    print("{0}".format("\t<S3_INFO>"), file=config)
+    read_pm_sdata(SYS_PATH[1] + 'DSDT', '_S3_', config)
+    print("{0}".format("\t</S3_INFO>\n"), file=config)
 
-    print("{0}".format("\t<S5_INFO>"), file=board_fp)
-    read_pm_sdata(SYS_PATH[1] + 'DSDT', '_S5_', board_fp)
-    print("{0}".format("\t</S5_INFO>\n"), file=board_fp)
+    print("{0}".format("\t<S5_INFO>"), file=config)
+    read_pm_sdata(SYS_PATH[1] + 'DSDT', '_S5_', config)
+    print("{0}".format("\t</S5_INFO>\n"), file=config)
 
-    print("{0}".format("\t<DRHD_INFO>"), file=board_fp)
-    dmar.write_dmar_data(SYS_PATH[1] + 'DMAR', board_fp)
-    print("{0}".format("\t</DRHD_INFO>\n"), file=board_fp)
+    print("{0}".format("\t<DRHD_INFO>"), file=config)
+    dmar.write_dmar_data(SYS_PATH[1] + 'DMAR', config)
+    print("{0}".format("\t</DRHD_INFO>\n"), file=config)
 
-    print("{0}".format("\t<CPU_BRAND>"), file=board_fp)
-    store_cpu_info(SYS_PATH[0], board_fp)
-    print("{0}".format("\t</CPU_BRAND>\n"), file=board_fp)
+    print("{0}".format("\t<CPU_BRAND>"), file=config)
+    store_cpu_info(SYS_PATH[0], config)
+    print("{0}".format("\t</CPU_BRAND>\n"), file=config)
 
-    print("{0}".format("\t<CX_INFO>"), file=board_fp)
-    store_cx_data(SYS_PATH[2]+'cpuidle/current_driver', SYS_PATH[2]+'cpu0/cpuidle/', board_fp)
-    print("{0}".format("\t</CX_INFO>\n"), file=board_fp)
+    print("{0}".format("\t<CX_INFO>"), file=config)
+    store_cx_data(SYS_PATH[2]+'cpuidle/current_driver', SYS_PATH[2]+'cpu0/cpuidle/', config)
+    print("{0}".format("\t</CX_INFO>\n"), file=config)
 
-    print("{0}".format("\t<PX_INFO>"), file=board_fp)
-    store_px_data(SYS_PATH[2], board_fp)
-    print("{0}".format("\t</PX_INFO>\n"), file=board_fp)
+    print("{0}".format("\t<PX_INFO>"), file=config)
+    store_px_data(SYS_PATH[2], config)
+    print("{0}".format("\t</PX_INFO>\n"), file=config)
 
 
 def generate_info(board_file):
-    """This will generate ACPI info from board file"""
+    """This will generate ACPI info from board file
+    :param board_file: this is the file which stores the hardware board information
+    """
     # Generate board info
-    with open(board_file, 'a+') as board_info:
-        gen_acpi_info(board_info)
+    with open(board_file, 'a+') as config:
+        gen_acpi_info(config)
diff --git a/misc/acrn-config/target/board_parser.py b/misc/acrn-config/target/board_parser.py
index 99e76100b..e83e1236d 100755
--- a/misc/acrn-config/target/board_parser.py
+++ b/misc/acrn-config/target/board_parser.py
@@ -8,17 +8,18 @@ import sys
 import shutil
 import argparse
 import subprocess
-import parser_lib
 import pci_dev
 import dmi
 import acpi
 import clos
+import misc
+import parser_lib
 
 OUTPUT = "./out/"
 PY_CACHE = "__pycache__"
 
 # This file store information which query from hw board
-BIN_LIST = ['cpuid', 'rdmsr', 'lspci', ' dmidecode']
+BIN_LIST = ['cpuid', 'rdmsr', 'lspci', ' dmidecode', 'blkid']
 PCI_IDS = ["/usr/share/hwdata/pci.ids", "/usr/share/misc/pci.ids"]
 
 CPU_VENDOR = "GenuineIntel"
@@ -57,7 +58,7 @@ def vendor_check():
             if len(line.split(':')) == 2:
                 if line.split(':')[0].strip() == "vendor_id":
                     vendor_name = line.split(':')[1].strip()
-                    return vendor_name != CPU_VENDOR
+                    return vendor_name == CPU_VENDOR
 
 
 def check_env():
@@ -66,7 +67,7 @@ def check_env():
         shutil.rmtree(PY_CACHE)
 
     # check cpu vendor id
-    if vendor_check():
+    if not vendor_check():
         parser_lib.print_red("Please run this tools on {}!".format(CPU_VENDOR))
         sys.exit(1)
 
@@ -91,7 +92,6 @@ def check_env():
                 parser_lib.print_yel("Need CPUID version >= 20170122")
                 sys.exit(1)
 
-
     if not native_check():
         parser_lib.print_red("Please run this tools on natvie OS!")
         sys.exit(1)
@@ -136,6 +136,9 @@ if __name__ == '__main__':
     # Generate clos info
     clos.generate_info(BOARD_INFO)
 
+    # Generate misc info
+    misc.generate_info(BOARD_INFO)
+
     with open(BOARD_INFO, 'a+') as f:
         print("</acrn-config>", file=f)
 
diff --git a/misc/acrn-config/target/clos.py b/misc/acrn-config/target/clos.py
index 15400c6f1..4fccfb35a 100644
--- a/misc/acrn-config/target/clos.py
+++ b/misc/acrn-config/target/clos.py
@@ -11,8 +11,11 @@ CACHE_TYPE = {
     }
 
 
-def execute(cmd, reg):
-    """Execute the cmd"""
+def dump_cpuid_reg(cmd, reg):
+    """execute the cmd of cpuid, and return the register value by reg
+    :param cmd: command what can be executed in shell
+    :param reg: register name
+    """
     cache_t = ''
 
     res = parser_lib.cmd_excute(cmd)
@@ -55,7 +58,7 @@ def get_clos_info():
     clos_max = 0
     clos_cache = False
     cmd = "cpuid -r -l 0x10"
-    clos_cache = execute(cmd, "ebx")
+    clos_cache = dump_cpuid_reg(cmd, "ebx")
 
     if clos_cache == "L2":
         cmd = "cpuid -r -l 0x10 --subleaf 2"
@@ -66,16 +69,19 @@ def get_clos_info():
         parser_lib.print_yel("CLOS is not supported!")
         return (clos_cache, clos_max)
 
-    clos_max = execute(cmd, "edx")
+    clos_max = dump_cpuid_reg(cmd, "edx")
 
     return (clos_cache, clos_max)
 
+
 def generate_info(board_info):
-    """Generate clos information"""
+    """Generate clos information
+    :param board_info: this is the file which stores the hardware board information
+    """
     (clos_cache, clos_max) = get_clos_info()
 
-    with open(board_info, 'a+') as board_fp:
-        print("\t<CLOS_INFO>", file=board_fp)
-        print("\tclos supported by cache:{}".format(clos_cache), file=board_fp)
-        print("\tclos max:{}".format(clos_max), file=board_fp)
-        print("\t</CLOS_INFO>\n", file=board_fp)
+    with open(board_info, 'a+') as config:
+        print("\t<CLOS_INFO>", file=config)
+        print("\tclos supported by cache:{}".format(clos_cache), file=config)
+        print("\tclos max:{}".format(clos_max), file=config)
+        print("\t</CLOS_INFO>\n", file=config)
diff --git a/misc/acrn-config/target/dmar.py b/misc/acrn-config/target/dmar.py
index fc348dd77..01d9be1b8 100644
--- a/misc/acrn-config/target/dmar.py
+++ b/misc/acrn-config/target/dmar.py
@@ -203,7 +203,13 @@ class PathDevFun:
 
 
 def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, n_cnt, drhd_cnt):
-    """Walk Pci bus"""
+    """Walk Pci bus
+    :param tmp_pdf: it is a class what contains path,device,function in dmar device scope region
+    :param dmar_tbl: it is a class to describe dmar which contains Device Scope and DRHD
+    :param dmar_hw_list: it is a class to describe hardware scope in DMAR table
+    :param n_cnt: the number of device in device scope
+    :param drhd_cnt: it is a counter to calculate the DRHD in DMAR table
+    """
     while n_cnt:
         scope_path = DevScopePath.from_address(dmar_tbl.path_offset)
         tmp_pdf.device = scope_path.device
@@ -223,7 +229,12 @@ def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, n_cnt, drhd_cnt):
 
 
 def walk_dev_scope(dmar_tbl, dmar_dev_list, dmar_hw_list, drhd_cnt):
-    """Walk device scope"""
+    """Walk device scope
+    :param dmar_tbl: it is a class to describe dmar which contains Device Scope and DRHD
+    :param dmar_dev_list: it is a class to describe device scope in DMAR table
+    :param dmar_hw_list: it is a class to describe DRHD in DMAR table
+    :param drhd_cnt: it is a counter to calculate the DRHD in DMAR table
+    """
     dmar_tbl.dev_scope_offset = dmar_tbl.sub_tbl_offset + ctypes.sizeof(DmarHwUnit)
     scope_end = dmar_tbl.dev_scope_offset + dmar_tbl.dmar_drhd.sub_header.length
     dmar_tbl.dev_scope_cnt = 0
@@ -259,7 +270,12 @@ def walk_dev_scope(dmar_tbl, dmar_dev_list, dmar_hw_list, drhd_cnt):
 
 
 def walk_dmar_table(dmar_tbl, dmar_hw_list, dmar_dev_list, sysnode):
-    """Walk dmar table and get information"""
+    """Walk dmar table and get information
+    :param dmar_tbl: it is a class to describe dmar which contains Device Scope and DRHD
+    :param dmar_hw_list: it is a class to describe hardware scope in DMAR table
+    :param dmar_dev_list: it is a class to describe device scope in DMAR table
+    :param sysnode: the system device node of acpi table, such as: /sys/firmware/acpi/tables/DMAR
+    """
     data = open(sysnode, 'rb').read()
     buf = ctypes.create_string_buffer(data, len(data))
     addr = ctypes.addressof(buf)
@@ -289,7 +305,7 @@ def walk_dmar_table(dmar_tbl, dmar_hw_list, dmar_dev_list, sysnode):
         dmar_hw_list.hw_flags_list.append(dmar_tbl.dmar_drhd.flags)
         dmar_hw_list.hw_address_list.append(dmar_tbl.dmar_drhd.address)
 
-        # in end of DRHD/sub tbl header is devscope
+        # in end of DRHD/sub tbl header is dev scope, then enumerate the device scope
         (dmar_tbl, dmar_dev_list, dmar_hw_list) = walk_dev_scope(
             dmar_tbl, dmar_dev_list, dmar_hw_list, drhd_cnt)
 
@@ -301,7 +317,10 @@ def walk_dmar_table(dmar_tbl, dmar_hw_list, dmar_dev_list, sysnode):
 
 
 def write_dmar_data(sysnode, config):
-    """Write the DMAR data to board info"""
+    """Write the DMAR data to board info
+    :param sysnode: the system device node of acpi table, such as: /sys/firmware/acpi/tables/DMAR
+    :param config: file pointer that opened for writing board information
+    """
 
     dmar_hw_list = DmarHwList()
     dmar_dev_list = DmarDevList()
diff --git a/misc/acrn-config/target/dmi.py b/misc/acrn-config/target/dmi.py
index 7f1b393ae..243b8ad78 100644
--- a/misc/acrn-config/target/dmi.py
+++ b/misc/acrn-config/target/dmi.py
@@ -12,9 +12,11 @@ CMDS = {
 
 
 def generate_info(board_info):
-    """Get bios and base board information"""
+    """Get bios and base board information
+    :param board_info: this is the file which stores the hardware board information
+    """
     with open(board_info, 'a+') as config:
-        parser_lib.dump_excute(CMDS['BIOS_INFO'], 'BIOS_INFO', config)
+        parser_lib.dump_execute(CMDS['BIOS_INFO'], 'BIOS_INFO', config)
         print("", file=config)
-        parser_lib.dump_excute(CMDS['BASE_BOARD_INFO'], 'BASE_BOARD_INFO', config)
+        parser_lib.dump_execute(CMDS['BASE_BOARD_INFO'], 'BASE_BOARD_INFO', config)
         print("", file=config)
diff --git a/misc/acrn-config/target/misc.py b/misc/acrn-config/target/misc.py
new file mode 100644
index 000000000..f5c5161e4
--- /dev/null
+++ b/misc/acrn-config/target/misc.py
@@ -0,0 +1,50 @@
+# Copyright (C) 2019 Intel Corporation. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+import parser_lib
+
+IO_MEM_PATH = '/proc/iomem'
+
+
+def get_system_ram(config):
+    """This will get systemd ram which are usable
+    :param config: file pointer that opened for writing board config information
+    """
+    print("\t<SYSTEM_RAM_INFO>", file=config)
+    with open(IO_MEM_PATH, 'rt') as mem_info:
+
+        while True:
+            line = mem_info.readline().strip()
+            if not line:
+                break
+
+            pat_type = line.split(':')[1].strip()
+            if pat_type == "System RAM":
+                print("\t{}".format(line), file=config)
+
+    print("\t</SYSTEM_RAM_INFO>", file=config)
+    print("", file=config)
+
+
+def get_root_dev(config):
+    """This will get available root device
+    :param config: file pointer that opened for writing board config information
+    """
+    cmd = 'blkid'
+    desc = 'ROOT_DEVICE_INFO'
+    parser_lib.dump_execute(cmd, desc, config)
+    print("", file=config)
+
+
+def generate_info(board_info):
+    """Get System Ram information
+    :param board_info: this is the file which stores the hardware board information
+    """
+    with open(board_info, 'a+') as config:
+
+        get_system_ram(config)
+
+        get_root_dev(config)
+
diff --git a/misc/acrn-config/target/parser_lib.py b/misc/acrn-config/target/parser_lib.py
index 9253b8551..f81fe2fc6 100644
--- a/misc/acrn-config/target/parser_lib.py
+++ b/misc/acrn-config/target/parser_lib.py
@@ -17,7 +17,10 @@ def check_dmi():
 
 
 def print_yel(msg, warn=False):
-    """Print the msg wiht color of yellow"""
+    """Output the message with the color of yellow
+    :param msg: the stings which will be output to STDOUT
+    :param warn: the condition if needs to be output the color of yellow with 'Warning'
+    """
     if warn:
         print("\033[1;33mWarning\033[0m:"+msg)
     else:
@@ -25,7 +28,10 @@ def print_yel(msg, warn=False):
 
 
 def print_red(msg, err=False):
-    """Print the msg wiht color of red"""
+    """Output the messag with the color of red
+    :param msg: the stings which will be output to STDOUT
+    :param err: the condition if needs to be output the color of red with 'Error'
+    """
     if err:
         print("\033[1;31mError\033[0m:"+msg)
     else:
@@ -33,13 +39,18 @@ def print_red(msg, err=False):
 
 
 def decode_stdout(resource):
-    """Decode stdout"""
+    """Decode the information and return one line of the decoded information
+    :param resource: it contains information produced by subprocess.Popen method
+    """
     line = resource.stdout.readline().decode('ascii')
     return line
 
 
 def handle_hw_info(line, hw_info):
-    """handle the hardware information"""
+    """Handle the hardware information
+    :param line: one line of information which had decoded to 'ASCII'
+    :param hw_info: the list which contains key strings what can describe bios/board
+    """
     for board_line in hw_info:
         if board_line == " ".join(line.split()[0:1]) or \
                 board_line == " ".join(line.split()[0:2]) or \
@@ -49,7 +60,9 @@ def handle_hw_info(line, hw_info):
 
 
 def handle_pci_dev(line):
-    """Handle if it is pci line"""
+    """Handle if it match PCI device information pattern
+    :param line: one line of information which had decoded to 'ASCII'
+    """
     if "Region" in line and "Memory at" in line:
         return True
 
@@ -61,15 +74,32 @@ def handle_pci_dev(line):
 
 
 def cmd_excute(cmd):
-    """Excute cmd and retrun raw"""
+    """Excute cmd and retrun raw information
+    :param cmd: command what can be executed in shell
+    """
     res = subprocess.Popen(cmd, shell=True,
                            stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
 
     return res
 
 
-def dump_excute(cmd, desc, config):
-    """Execute cmd and get information"""
+def handle_root_dev(line):
+    """Handle if it match root device information pattern
+    :param line: one line of information which had decoded to 'ASCII'
+    """
+    for root_type in line.split():
+        if "ext4" in root_type or "ext3" in root_type:
+            return True
+
+    return False
+
+
+def dump_execute(cmd, desc, config):
+    """Execute cmd and get information
+    :param cmd: command what can be executed in shell
+    :param desc: the string indicated what class information store to board.xml
+    :param config: file pointer that opened for writing board information
+    """
     val_dmi = check_dmi()
     print("\t<{0}>".format(desc), file=config)
 
@@ -101,6 +131,11 @@ def dump_excute(cmd, desc, config):
             if not ret:
                 continue
 
+        if desc == "ROOT_DEVICE_INFO":
+            ret = handle_root_dev(line)
+            if not ret:
+                continue
+
         print("\t{}".format(line.strip()), file=config)
 
     print("\t</{0}>".format(desc), file=config)
diff --git a/misc/acrn-config/target/pci_dev.py b/misc/acrn-config/target/pci_dev.py
index cd31a8ce6..e28c953fe 100644
--- a/misc/acrn-config/target/pci_dev.py
+++ b/misc/acrn-config/target/pci_dev.py
@@ -12,9 +12,11 @@ CMDS = {
 
 
 def generate_info(board_info):
-    """Get the pci info"""
+    """Get the pci info
+    :param board_info: this is the file which stores the hardware board information
+    """
     with open(board_info, 'a+') as config:
-        parser_lib.dump_excute(CMDS['PCI_DEVICE'], 'PCI_DEVICE', config)
+        parser_lib.dump_execute(CMDS['PCI_DEVICE'], 'PCI_DEVICE', config)
         print("", file=config)
-        parser_lib.dump_excute(CMDS['PCI_VID_PID'], 'PCI_VID_PID', config)
+        parser_lib.dump_execute(CMDS['PCI_VID_PID'], 'PCI_VID_PID', config)
         print("", file=config)