diff --git a/Android.bp b/Android.bp
index aca6e40..780fd69 100644
--- a/Android.bp
+++ b/Android.bp
@@ -493,137 +493,189 @@
     ],
 }
 
-// This is a minimized cil modules to test microdroid.
-// TODO(b/178993690): migrate cil files to Android.bp and remove below
-filegroup {
-    name: "microdroid_sepolicy_build_files",
+se_build_files {
+    name: "se_build_files",
     srcs: [
-        // This order is important. Should be identical to sepolicy_build_files in Android.mk
-        "private/security_classes",
-        "private/initial_sids",
-        "private/access_vectors",
-        "public/global_macros",
-        "public/neverallow_macros",
-        "private/mls_macros",
-        "private/mls_decl",
-        "private/mls",
-        "private/policy_capabilities",
-        "public/te_macros",
-        "public/attributes",
-        "private/attributes",
-        "public/ioctl_defines",
-        "public/ioctl_macros",
-        "public/*.te",
-        "private/*.te",
-        "private/roles_decl",
-        "public/roles",
-        "private/users",
-        "private/initial_sid_contexts",
-        "private/fs_use",
-        "private/genfs_contexts",
-        "private/port_contexts",
+        "security_classes",
+        "initial_sids",
+        "access_vectors",
+        "global_macros",
+        "neverallow_macros",
+        "mls_macros",
+        "mls_decl",
+        "mls",
+        "policy_capabilities",
+        "te_macros",
+        "attributes",
+        "ioctl_defines",
+        "ioctl_macros",
+        "*.te",
+        "roles_decl",
+        "roles",
+        "users",
+        "initial_sid_contexts",
+        "fs_use",
+        "genfs_contexts",
+        "port_contexts",
     ],
 }
 
-filegroup {
-    name: "microdroid_sepolicy_public_and_reqd_mask_build_files",
-    srcs: [
-        // This order is important. Should be identical to sepolicy_build_files in Android.mk
-        "reqd_mask/security_classes",
-        "reqd_mask/initial_sids",
-        "reqd_mask/access_vectors",
-        "public/global_macros",
-        "public/neverallow_macros",
-        "reqd_mask/mls_macros",
-        "reqd_mask/mls_decl",
-        "reqd_mask/mls",
-        "public/te_macros",
-        "public/attributes",
-        "public/ioctl_defines",
-        "public/ioctl_macros",
-        "public/*.te",
-        "reqd_mask/*.te",
-        "reqd_mask/roles_decl",
-        "public/roles",
-        "reqd_mask/roles",
-        "reqd_mask/users",
-        "reqd_mask/initial_sid_contexts",
-    ],
-}
-
-filegroup {
-    name: "microdroid_sepolicy_reqd_mask_build_files",
-    srcs: [
-        // This order is important. Should be identical to sepolicy_build_files in Android.mk
-        "reqd_mask/security_classes",
-        "reqd_mask/initial_sids",
-        "reqd_mask/access_vectors",
-        "reqd_mask/mls_macros",
-        "reqd_mask/mls_decl",
-        "reqd_mask/mls",
-        "reqd_mask/*.te",
-        "reqd_mask/roles_decl",
-        "reqd_mask/roles",
-        "reqd_mask/users",
-        "reqd_mask/initial_sid_contexts",
-    ],
-}
-
-// These variables are based on aosp_cf_x86_64_only_phone-userdebug. Other than target_arch,
-// these configurations should be fine to test microdroid on normal devices with full treble.
-// The exception is target_arch. But as target_arch is meaningful only on mips, and as we are not
-// running microdroid on mips for now, we skip assigning target_arch here. After cil files are fully
-// migrated into Soong, these will have correct values.
-policy_to_conf_flags = "$(location m4) --fatal-warnings " +
-"-D mls_num_sens=1 -D mls_num_cats=1024 " +
-"-D target_build_variant=userdebug " +
-"-D target_with_asan=false " +
-"-D target_with_native_coverage=false " +
-"-D target_full_treble=true " +
-"-D target_compatible_property=true " +
-"-D target_treble_sysprop_neverallow=true " +
-"-D target_enforce_sysprop_owner=true "
-
-genrule {
-    name: "microdroid_plat_sepolicy.cil_gen",
-    srcs: [":microdroid_sepolicy_build_files"],
-    tools: ["m4", "checkpolicy"],
-    out: ["plat_sepolicy.cil"],
-    cmd: policy_to_conf_flags +
-        "-s $(locations :microdroid_sepolicy_build_files) > $(out).conf" +
-        "&& $(location checkpolicy) -M -C -c 30 -o $(out) $(out).conf",
-    visibility: ["//visibility:private"],
-}
-
-prebuilt_etc {
-    name: "microdroid_plat_sepolicy.cil",
-    src: ":microdroid_plat_sepolicy.cil_gen",
-    filename: "plat_sepolicy.cil",
-    relative_install_path: "selinux",
+// reqd_policy_mask - a policy.conf file which contains only the bare minimum
+// policy necessary to use checkpolicy.
+//
+// This bare-minimum policy needs to be present in all policy.conf files, but
+// should not necessarily be exported as part of the public policy.
+//
+// The rules generated by reqd_policy_mask will allow the compilation of public
+// policy and subsequent removal of CIL policy that should not be exported.
+se_policy_conf {
+    name: "reqd_policy_mask.conf",
+    srcs: [":se_build_files{.reqd_mask}"],
     installable: false,
 }
 
-genrule {
-    name: "microdroid_reqd_policy_mask.cil_gen",
-    srcs: [":microdroid_sepolicy_reqd_mask_build_files"],
-    tools: ["m4", "checkpolicy"],
-    out: ["reqd_policy_mask.cil"],
-    cmd: policy_to_conf_flags +
-        "-s $(in) > $(out).conf" +
-        "&& $(location checkpolicy) -C -M -c 30 -o $(out) $(out).conf",
-    visibility: ["//visibility:private"],
+se_policy_cil {
+    name: "reqd_policy_mask.cil",
+    src: ":reqd_policy_mask.conf",
+    secilc_check: false,
+    installable: false,
 }
 
+// pub_policy - policy that will be exported to be a part of non-platform
+// policy corresponding to this platform version.
+//
+// This is a limited subset of policy that would not compile in checkpolicy on
+// its own.
+//
+// To get around this limitation, add only the required files from private
+// policy, which will generate CIL policy that will then be filtered out by the
+// reqd_policy_mask.
+//
+// There are three pub_policy.cil files below:
+//   - pub_policy.cil: exported 'product', 'system_ext' and 'system' policy.
+//   - system_ext_pub_policy.cil: exported 'system_ext' and 'system' policy.
+//   - plat_pub_policy.cil: exported 'system' policy.
+//
+// Those above files will in turn be used to generate the following versioned cil files:
+//   - product_mapping_file: the versioned, exported 'product' policy in product partition.
+//   - system_ext_mapping_file: the versioned, exported 'system_ext' policy in system_ext partition.
+//   - plat_mapping_file: the versioned, exported 'system' policy in system partition.
+//   - plat_pub_versioned.cil: the versioned, exported 'product', 'system_ext' and 'system' policy
+//                             in vendor partition.
+//
+se_policy_conf {
+    name: "pub_policy.conf",
+    srcs: [":se_build_files{.product_public}"], // product_ includes system and system_ext
+    installable: false,
+}
+
+se_policy_cil {
+    name: "pub_policy.cil",
+    src: ":pub_policy.conf",
+    filter_out: [":reqd_policy_mask.cil"],
+    secilc_check: false,
+    installable: false,
+}
+
+se_policy_conf {
+    name: "system_ext_pub_policy.conf",
+    srcs: [":se_build_files{.system_ext_public}"], // system_ext_public includes system
+    installable: false,
+}
+
+se_policy_cil {
+    name: "system_ext_pub_policy.cil",
+    src: ":system_ext_pub_policy.conf",
+    filter_out: [":reqd_policy_mask.cil"],
+    secilc_check: false,
+    installable: false,
+}
+
+se_policy_conf {
+    name: "plat_pub_policy.conf",
+    srcs: [":se_build_files{.plat_public}"],
+    installable: false,
+}
+
+se_policy_cil {
+    name: "plat_pub_policy.cil",
+    src: ":plat_pub_policy.conf",
+    filter_out: [":reqd_policy_mask.cil"],
+    secilc_check: false,
+    installable: false,
+}
+
+// plat_policy.conf - A combination of the private and public platform policy
+// which will ship with the device.
+//
+// The platform will always reflect the most recent platform version and is not
+// currently being attributized.
+se_policy_conf {
+    name: "plat_sepolicy.conf",
+    srcs: [":se_build_files{.plat}"],
+    installable: false,
+}
+
+se_policy_cil {
+    name: "plat_sepolicy.cil",
+    src: ":plat_sepolicy.conf",
+    additional_cil_files: ["private/technical_debt.cil"],
+}
+
+// system_ext_policy.conf - A combination of the private and public system_ext
+// policy which will ship with the device. System_ext policy is not attributized
+se_policy_conf {
+    name: "system_ext_sepolicy.conf",
+    srcs: [":se_build_files{.system_ext}"],
+    installable: false,
+}
+
+se_policy_cil {
+    name: "system_ext_sepolicy.cil",
+    src: ":system_ext_sepolicy.conf",
+    system_ext_specific: true,
+    filter_out: [":plat_sepolicy.cil"],
+    remove_line_marker: true,
+}
+
+// product_policy.conf - A combination of the private and public product policy
+// which will ship with the device. Product policy is not attributized
+se_policy_conf {
+    name: "product_sepolicy.conf",
+    srcs: [":se_build_files{.product}"],
+    installable: false,
+}
+
+se_policy_cil {
+    name: "product_sepolicy.cil",
+    src: ":product_sepolicy.conf",
+    product_specific: true,
+    filter_out: [":plat_sepolicy.cil", ":system_ext_sepolicy.cil"],
+    remove_line_marker: true,
+}
+
+//////////////////////////////////
+// SELinux policy embedded into CTS.
+// CTS checks neverallow rules of this policy against the policy of the device under test.
+//////////////////////////////////
+se_policy_conf {
+    name: "general_sepolicy.conf",
+    srcs: [":se_build_files{.plat}"],
+    build_variant: "user",
+    cts: true,
+    exclude_build_test: true,
+}
+
+//////////////////////////////////
+// modules for microdroid
+// TODO(b/178993690): migrate Android.mk to Android.bp and remove workarounds
+//////////////////////////////////
 genrule {
     name: "microdroid_plat_mapping_file_gen",
-    srcs: [":microdroid_sepolicy_public_and_reqd_mask_build_files", ":microdroid_reqd_policy_mask.cil_gen"],
-    tools: ["m4", "checkpolicy", "build_sepolicy", "version_policy"],
+    srcs: [":plat_pub_policy.cil"],
+    tools: ["version_policy"],
     out: ["10000.0.cil"],
-    cmd: policy_to_conf_flags +
-        "-s $(locations :microdroid_sepolicy_public_and_reqd_mask_build_files) > $(out).conf" +
-        "&& $(location checkpolicy) -M -C -c 30 -o $(out).pub $(out).conf" +
-        "&& $(location build_sepolicy) filter_out -f $(location :microdroid_reqd_policy_mask.cil_gen) -t $(out).pub" +
-        "&& $(location version_policy) -b $(out).pub -m -n 10000.0 -o $(out)",
+    cmd: "$(location version_policy) -b $(location :plat_pub_policy.cil) -m -n 10000.0 -o $(out)",
     visibility: ["//visibility:private"],
 }
 
@@ -635,34 +687,32 @@
     installable: false,
 }
 
-///////////////////////////////////////////////////////////////////
-genrule {
-    name: "microdroid_pub_policy.cil_gen",
-    srcs: [
-        ":microdroid_sepolicy_public_and_reqd_mask_build_files",
-        ":microdroid_reqd_policy_mask.cil_gen",
-    ],
-    tools: ["m4", "checkpolicy", "build_sepolicy"],
-    out: ["pub_policy.cil"],
-    cmd: policy_to_conf_flags + " -s $(locations :microdroid_sepolicy_public_and_reqd_mask_build_files) > $(out).conf && " +
-        "$(location checkpolicy) -C -M -c 30 -o $(out) $(out).conf && " +
-        "$(location build_sepolicy) filter_out -f $(location :microdroid_reqd_policy_mask.cil_gen) -t $(out)",
-    visibility: ["//visibility:private"],
-}
-
+// Normally plat_pub_versioned.cil is built from pub_policy.cil (including system_ext and product).
+// But microdroid only has system, so its plat_pub_versioned.cil uses plat_pub_policy.cil.
 genrule {
     name: "microdroid_plat_pub_versioned.cil_gen",
-    srcs: [":microdroid_pub_policy.cil_gen"],
+    srcs: [":plat_pub_policy.cil"],
     tools: ["version_policy"],
     out: ["plat_pub_versioned.cil"],
     cmd: "$(location version_policy) " +
-        "-b $(location :microdroid_pub_policy.cil_gen) " +
-        "-t $(location :microdroid_pub_policy.cil_gen) " +
+        "-b $(location :plat_pub_policy.cil) " +
+        "-t $(location :plat_pub_policy.cil) " +
         "-n 10000.0 " +
         "-o $(out)",
     visibility: ["//visibility:private"],
 }
 
+prebuilt_etc {
+    name: "microdroid_plat_pub_versioned.cil",
+    src: ":microdroid_plat_pub_versioned.cil_gen",
+    filename: "plat_pub_versioned.cil",
+    relative_install_path: "selinux",
+    installable: false,
+}
+
+// policy files for microdroid vendor
+// This contains a minimal set of policy files for microdroid vendor.
+// TODO(b/178993690): update se_build_files to cover this
 filegroup {
     name: "microdroid_vendor_sepolicy_build_files",
     srcs: [
@@ -689,31 +739,35 @@
     ],
 }
 
+se_policy_conf {
+    name: "microdroid_vendor_sepolicy.conf",
+    srcs: [":microdroid_vendor_sepolicy_build_files"],
+    installable: false,
+}
+
 genrule {
     name: "microdroid_vendor_sepolicy.cil_gen",
     srcs: [
-        ":microdroid_vendor_sepolicy_build_files",
+        ":microdroid_vendor_sepolicy.conf",
         ":microdroid_plat_pub_versioned.cil_gen",
-        ":microdroid_pub_policy.cil_gen",
-        ":microdroid_reqd_policy_mask.cil_gen",
+        ":plat_pub_policy.cil",
+        ":reqd_policy_mask.cil",
     ],
     tools: [
-        "m4",
         "build_sepolicy",
         "checkpolicy",
         "secilc",
         "version_policy",
     ],
     out: ["vendor_sepolicy.cil"],
-    cmd: policy_to_conf_flags + " -s $(locations :microdroid_vendor_sepolicy_build_files) > $(out).conf && " +
-        "$(location build_sepolicy) " +
+    cmd: "$(location build_sepolicy) " +
         "--android_host_path $$(dirname $(location build_sepolicy)) " +
         "build_cil " +
-        "--input_policy_conf $(out).conf " +
+        "--input_policy_conf $(location :microdroid_vendor_sepolicy.conf) " +
         "--checkpolicy_env ASAN_OPTIONS=detect_leaks=0 " +
-        "--base_policy $(location :microdroid_pub_policy.cil_gen) " +
+        "--base_policy $(location :plat_pub_policy.cil) " +
         "--filter_out_files $(location :microdroid_plat_pub_versioned.cil_gen) " +
-        "--reqd_mask $(location :microdroid_reqd_policy_mask.cil_gen) " +
+        "--reqd_mask $(location :reqd_policy_mask.cil) " +
         "--treble_sepolicy_vers 10000.0 " +
         "--policy_vers 30 " +
         "--output_cil $(out)",
@@ -727,38 +781,3 @@
     relative_install_path: "selinux",
     installable: false,
 }
-
-prebuilt_etc {
-    name: "microdroid_plat_pub_versioned.cil",
-    src: ":microdroid_plat_pub_versioned.cil_gen",
-    filename: "plat_pub_versioned.cil",
-    relative_install_path: "selinux",
-    installable: false,
-}
-
-se_build_files {
-    name: "se_build_files",
-    srcs: [
-        "security_classes",
-        "initial_sids",
-        "access_vectors",
-        "global_macros",
-        "neverallow_macros",
-        "mls_macros",
-        "mls_decl",
-        "mls",
-        "policy_capabilities",
-        "te_macros",
-        "attributes",
-        "ioctl_defines",
-        "ioctl_macros",
-        "*.te",
-        "roles_decl",
-        "roles",
-        "users",
-        "initial_sid_contexts",
-        "fs_use",
-        "genfs_contexts",
-        "port_contexts",
-    ],
-}