[cip-dev][isar-cip-core][PATCH v2 06/12] Apply hardening configuration to the kernel

Use the provided kernel hardening configuration options in the kernel
build.

Co-Authored-by: Felix Moessbauer <[email protected]>
Co-Authored-by: Christoph Steiger <[email protected]>
Signed-off-by: Quirin Gylstorff <[email protected]>
---
 recipes-kernel/linux/kernel-hardening.inc | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 recipes-kernel/linux/kernel-hardening.inc

diff --git a/recipes-kernel/linux/kernel-hardening.inc b/recipes-kernel/linux/kernel-hardening.inc
new file mode 100644
index 00000000..2b22fca4
--- /dev/null
+++ b/recipes-kernel/linux/kernel-hardening.inc
@@ -0,0 +1,16 @@
+#
+# CIP Core, generic profile
+#
+# Copyright (c) Siemens AG, 2026
+#
+# SPDX-License-Identifier: MIT
+
+OVERRIDES:append = "${@'kernel-hardening' if bb.utils.to_boolean(d.getVar('CIP_CIS_HARDENING')) else ''}"
+
+KERNEL_CONFIG_FRAGMENTS:kernel-hardening += "hardening.kernel.cfg"
+
+do_dpkg_source[depends] += "${@'cip-cis-rules-config:do_deploy_hardening' if bb.utils.to_boolean(d.getVar('CIP_CIS_HARDENING')) else ''}"
+
+do_dpkg_source:prepend:kernel-hardening() {
+    cp ${DEPLOY_DIR_IMAGE}/${DISTRO}-hardening.kernel.cfg ${WORKDIR}/hardening.kernel.cfg
+}
-- 
2.55.0