diff --git a/misc/config_tools/hv_config/board_defconfig.py b/misc/config_tools/hv_config/board_defconfig.py
index b8769043d..71daa3d67 100644
--- a/misc/config_tools/hv_config/board_defconfig.py
+++ b/misc/config_tools/hv_config/board_defconfig.py
@@ -21,6 +21,7 @@ def get_serial_type():
     ttys_type = ''
     ttys_value = ''
     pci_mmio = False
+    width = None  # Only set if width field is found
 
     # Get ttySx information from board config file
     ttys_lines = board_cfg_lib.get_info(acrn_config_utilities.BOARD_INFO_FILE, "<TTYS_INFO>", "</TTYS_INFO>")
@@ -34,20 +35,34 @@ def get_serial_type():
     for line in ttys_lines:
         if ttyn in line:
             # line format:
-            # seri:/dev/ttyS0 type:portio base:0x3F8 irq:4
-            # seri:/dev/ttyS0 type:mmio base:0xB3640000 irq:4 [bdf:"0:x.y"]
-            ttys_type = line.split()[1].split(':')[1]
+            # seri:/dev/ttyS0 type:portio base:0x3F8 [width:1byte] irq:4
+            # seri:/dev/ttyS0 type:mmio base:0xB3640000 [width:1byte] irq:4 [bdf:"0:x.y"]
+            parts = line.split()
+            ttys_type = parts[1].split(':')[1]
+
+            # Parse width if present
+            for part in parts:
+                if part.startswith('width:'):
+                    width_str = part.split(':')[1]
+                    if 'byte' in width_str:
+                        width = int(width_str.replace('byte', ''))
+                    break
+
             if ttys_type == "portio":
-                ttys_value = line.split()[2].split(':')[1]
+                ttys_value = parts[2].split(':')[1]
             elif ttys_type == "mmio":
                 if 'bdf' in line:
-                    ttys_value = line.split()[-1].split('"')[1:-1][0]
-                    pci_mmio = True
+                    # Find the bdf field specifically
+                    for part in parts:
+                        if part.startswith('bdf:'):
+                            ttys_value = part.split('"')[1]
+                            pci_mmio = True
+                            break
                 else:
-                    ttys_value = line.split()[2].split(':')[1]
+                    ttys_value = parts[2].split(':')[1]
             break
 
-    return (ttys_type, ttys_value, pci_mmio)
+    return (ttys_type, ttys_value, pci_mmio, width)
 
 
 def get_memory(hv_info, config):
@@ -66,7 +81,7 @@ def get_memory(hv_info, config):
 
 def get_serial_console(config):
 
-    (serial_type, serial_value, pci_mmio) = get_serial_type()
+    (serial_type, serial_value, pci_mmio, width) = get_serial_type()
     if serial_type == "portio":
         print("CONFIG_SERIAL_LEGACY=y", file=config)
         print("CONFIG_SERIAL_PIO_BASE={}".format(serial_value), file=config)
@@ -83,6 +98,10 @@ def get_serial_console(config):
         if serial_value:
             print('CONFIG_SERIAL_MMIO_BASE={}'.format(serial_value), file=config)
 
+    # Only output width configuration if width field was found
+    if width is not None:
+        print("CONFIG_SERIAL_REG_WIDTH={}".format(width), file=config)
+
 def get_features(hv_info, config):
 
     print("CONFIG_{}=y".format(hv_info.features.scheduler), file=config)
diff --git a/misc/config_tools/static_allocators/lib/lib.py b/misc/config_tools/static_allocators/lib/lib.py
index 491242147..a7bea2a38 100644
--- a/misc/config_tools/static_allocators/lib/lib.py
+++ b/misc/config_tools/static_allocators/lib/lib.py
@@ -80,14 +80,24 @@ def get_native_ttys():
         for tty_line in ttys_lines:
             tmp_dic = {}
             #seri:/dev/ttySx type:mmio base:0x91526000 irq:4 [bdf:"00:18.0"]
+            #seri:/dev/ttySx type:mmio base:0x91526000 width:1byte irq:4 [bdf:"00:18.0"]
             #seri:/dev/ttySy type:portio base:0x2f8 irq:5
-            tty = tty_line.split('/')[2].split()[0]
-            ttys_type = tty_line.split()[1].split(':')[1].strip()
-            ttys_base = tty_line.split()[2].split(':')[1].strip()
-            ttys_irq = tty_line.split()[3].split(':')[1].strip()
+            parts = tty_line.split()
+            tty = parts[0].split('/')[2]
+            ttys_type = parts[1].split(':')[1].strip()
+            ttys_base = parts[2].split(':')[1].strip()
+
+            # Find irq field by looking for "irq:" prefix
+            ttys_irq = None
+            for part in parts:
+                if part.startswith('irq:'):
+                    ttys_irq = part.split(':')[1].strip()
+                    break
+
             tmp_dic['type'] = ttys_type
             tmp_dic['base'] = ttys_base
-            tmp_dic['irq'] = int(ttys_irq)
+            if ttys_irq is not None:
+                tmp_dic['irq'] = int(ttys_irq)
             native_ttys[tty] = tmp_dic
     return native_ttys
 
diff --git a/misc/config_tools/xforms/config_common.xsl b/misc/config_tools/xforms/config_common.xsl
index 3f919f3be..653d57be2 100644
--- a/misc/config_tools/xforms/config_common.xsl
+++ b/misc/config_tools/xforms/config_common.xsl
@@ -216,6 +216,8 @@
     <xsl:variable name="irq" select="substring-before(substring-after($tokens, 'irq:'), ' ')" />
     <xsl:variable name="bdf_string" select="substring-before(substring-after($tokens, 'bdf:'), ' ')" />
     <xsl:variable name="bdf" select="substring($bdf_string, 2, string-length($bdf_string) - 2)" />
+    <xsl:variable name="width_string" select="substring-before(substring-after($tokens, 'width:'), ' ')" />
+    <xsl:variable name="width" select="substring-before($width_string, 'byte')" />
 
     <xsl:choose>
       <!-- TODO: Raise an error upon incomplete serial port info -->
@@ -264,6 +266,14 @@
 	</xsl:if>
       </xsl:otherwise>
     </xsl:choose>
+
+    <!-- Add width configuration if present -->
+    <xsl:if test="$width != ''">
+      <xsl:call-template name="integer-by-key-value">
+        <xsl:with-param name="key" select="'SERIAL_REG_WIDTH'" />
+        <xsl:with-param name="value" select="$width" />
+      </xsl:call-template>
+    </xsl:if>
   </xsl:template>
 
   <xsl:template match="MISC_CFG">