kernel-initramfs: define this package to include the initramfs image for kernel boot

Signed-off-by: Lans Zhang <jia.zhang@windriver.com>

meta-efi-secure-boot/recipes-kernel/linux/kernel-initramfs.bbappend

@@ -0,0 +1,58 @@
+inherit user-key-store deploy
+
+# Always fetch the latest initramfs image
+do_install[nostamp] = "1"
+
+fakeroot python do_sign() {
+    initramfs = None
+
+    if d.getVar('BUNDLE', True) == '0':
+        initramfs = d.expand('${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.cpio.gz')
+    else:
+        initramfs = d.expand('${D}/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}')
+
+    if initramfs == None or not os.path.exists(initramfs):
+        return
+
+    uks_sel_sign(initramfs, d)
+}
+addtask sign after do_install before do_deploy do_package
+
+do_deploy() {
+    initramfs=""
+    initramfs_dest=""
+
+    if [ "${BUNDLE}" = "0" ]; then
+        initramfs="${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.cpio.gz"
+        initramfs_dest="${DEPLOYDIR}/${INITRAMFS_IMAGE}-${MACHINE}.cpio.gz"
+    else
+        initramfs="${D}/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}"
+        initramfs_dest="${DEPLOYDIR}/${KERNEL_IMAGETYPE}-initramfs-${MACHINE}.bin"
+    fi
+
+    if [ -f "$initramfs.p7b" ]; then
+        install -d "${DEPLOYDIR}"
+
+        install -m 0644 "$initramfs.p7b" "$initramfs_dest.p7b"
+    fi
+}
+addtask deploy after do_install before do_build
+
+pkg_postinst_${PN}_append() {
+    if [ "${BUNDLE}" = "1" ] ; then
+        update-alternatives --install "/boot/${KERNEL_IMAGETYPE}.p7b" \
+            "${KERNEL_IMAGETYPE}.p7b" \
+            "/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}.p7b" 50101
+    fi
+
+    true
+}
+
+pkg_prerm_${PN}_append() {
+    if [ "${BUNDLE}" = "1" ] ; then
+        update-alternatives --remove "${KERNEL_IMAGETYPE}.p7b" \
+            "${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}.p7b"
+    fi
+
+    true
+}