diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index e3db161..09f69d0 100644
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -871,7 +871,7 @@
 
   if has_vendor_kernel_boot:
     banner("vendor_kernel_boot")
-    vendor_kernel_boot_image = common.GetVendorBootImage(
+    vendor_kernel_boot_image = common.GetVendorKernelBootImage(
         "IMAGES/vendor_kernel_boot.img", "vendor_kernel_boot.img", OPTIONS.input_tmp,
         "VENDOR_KERNEL_BOOT")
     if vendor_kernel_boot_image:
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 4816a23..5f74e2b 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -114,7 +114,7 @@
 # AVB_FOOTER_ARGS_BY_PARTITION in sign_target_files_apks need to be updated
 # accordingly.
 AVB_PARTITIONS = ('boot', 'init_boot', 'dtbo', 'odm', 'product', 'pvmfw', 'recovery',
-                  'system', 'system_ext', 'vendor', 'vendor_boot',
+                  'system', 'system_ext', 'vendor', 'vendor_boot', 'vendor_kernel_boot',
                   'vendor_dlkm', 'odm_dlkm', 'system_dlkm')
 
 # Chained VBMeta partitions.
@@ -1841,7 +1841,7 @@
   return None
 
 
-def _BuildVendorBootImage(sourcedir, info_dict=None):
+def _BuildVendorBootImage(sourcedir, partition_name, info_dict=None):
   """Build a vendor boot image from the specified sourcedir.
 
   Take a ramdisk, dtb, and vendor_cmdline from the input (in 'sourcedir'), and
@@ -1866,8 +1866,13 @@
 
   fn = os.path.join(sourcedir, "dtb")
   if os.access(fn, os.F_OK):
-    cmd.append("--dtb")
-    cmd.append(fn)
+    has_vendor_kernel_boot = (info_dict.get("vendor_kernel_boot", "").lower() == "true")
+
+    # Pack dtb into vendor_kernel_boot if building vendor_kernel_boot.
+    # Otherwise pack dtb into vendor_boot.
+    if not has_vendor_kernel_boot or partition_name == "vendor_kernel_boot":
+      cmd.append("--dtb")
+      cmd.append(fn)
 
   fn = os.path.join(sourcedir, "vendor_cmdline")
   if os.access(fn, os.F_OK):
@@ -1927,11 +1932,11 @@
   # AVB: if enabled, calculate and add hash.
   if info_dict.get("avb_enable") == "true":
     avbtool = info_dict["avb_avbtool"]
-    part_size = info_dict["vendor_boot_size"]
+    part_size = info_dict[f'{partition_name}_size']
     cmd = [avbtool, "add_hash_footer", "--image", img.name,
-           "--partition_size", str(part_size), "--partition_name", "vendor_boot"]
-    AppendAVBSigningArgs(cmd, "vendor_boot")
-    args = info_dict.get("avb_vendor_boot_add_hash_footer_args")
+           "--partition_size", str(part_size), "--partition_name", partition_name]
+    AppendAVBSigningArgs(cmd, partition_name)
+    args = info_dict.get(f'avb_{partition_name}_add_hash_footer_args')
     if args and args.strip():
       cmd.extend(shlex.split(args))
     RunAndCheckOutput(cmd)
@@ -1965,7 +1970,31 @@
     info_dict = OPTIONS.info_dict
 
   data = _BuildVendorBootImage(
-      os.path.join(unpack_dir, tree_subdir), info_dict)
+      os.path.join(unpack_dir, tree_subdir), "vendor_boot", info_dict)
+  if data:
+    return File(name, data)
+  return None
+
+
+def GetVendorKernelBootImage(name, prebuilt_name, unpack_dir, tree_subdir,
+                       info_dict=None):
+  """Return a File object with the desired vendor kernel boot image.
+
+  Look for it under 'unpack_dir'/IMAGES, otherwise construct it from
+  the source files in 'unpack_dir'/'tree_subdir'."""
+
+  prebuilt_path = os.path.join(unpack_dir, "IMAGES", prebuilt_name)
+  if os.path.exists(prebuilt_path):
+    logger.info("using prebuilt %s from IMAGES...", prebuilt_name)
+    return File.FromLocalFile(name, prebuilt_path)
+
+  logger.info("building image from target_files %s...", tree_subdir)
+
+  if info_dict is None:
+    info_dict = OPTIONS.info_dict
+
+  data = _BuildVendorBootImage(
+      os.path.join(unpack_dir, tree_subdir), "vendor_kernel_boot", info_dict)
   if data:
     return File(name, data)
   return None
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index c803340..6af7486 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -226,6 +226,7 @@
     'pvmfw': 'avb_pvmfw_add_hash_footer_args',
     'vendor': 'avb_vendor_add_hashtree_footer_args',
     'vendor_boot': 'avb_vendor_boot_add_hash_footer_args',
+    'vendor_kernel_boot': 'avb_vendor_kernel_boot_add_hash_footer_args',
     'vendor_dlkm': "avb_vendor_dlkm_add_hashtree_footer_args",
     'vbmeta': 'avb_vbmeta_args',
     'vbmeta_system': 'avb_vbmeta_system_args',