README: update README

Signed-off-by: Jia Zhang <qianyue.zj@alibaba-inc.com>

2 files changed, 12 insertions, 3 deletions

diff --git a/README b/README
index 4c99579..678e200 100644
--- a/README
+++ b/README
@@ -75,8 +75,10 @@ The full features in meta-secure-core can be configured with these definitions
 in local.conf:
 
 INITRAMFS_IMAGE = "secure-core-image-initramfs"
-DISTRO_FEATURES_NATIVE_append += " ima tpm tpm2 efi-secure-boot luks"
-DISTRO_FEATURES_append += " ima tpm tpm2 efi-secure-boot luks"
+DISTRO_FEATURES_NATIVE_append += "systemd ima tpm tpm2 efi-secure-boot luks"
+DISTRO_FEATURES_append += "systemd ima tpm tpm2 efi-secure-boot luks modsign"
+MACHINE_FEATURES_NATIVE_append += "efi"
+MACHINE_FEATURES_append += "efi"
 INHERIT += "sign_rpm_ext"
 SECURE_CORE_IMAGE_EXTRA_INSTALL ?= "\
     packagegroup-efi-secure-boot \
@@ -94,3 +96,8 @@ The meta-secure-core provides an image called secure-core-image. Run the
 following command to build it.
 
     $ bitbake secure-core-image
+
+Reference
+=========
+
+[SecureCore - a reference implementation based on meta-secure-core](https://github.com/jiazhang0/SecureCore)
diff --git a/README.md b/README.md
index 9ac48a1..518c3a9 100644
--- a/README.md
+++ b/README.md
@@ -79,4 +79,6 @@ This feature provides the integrity verification for the RPM package.
 
 ### Building the meta-secure-core layer
 This layer should be added to the bblayers.conf file. To enable certain
-feature provided by this layer, add the feature to the local.conf file. 
+feature provided by this layer, add the feature to the local.conf file.
+
+A reference implementation based on this layer is [available](https://github.com/jiazhang0/SecureCore).