################################################################################
# Common configuration for building kernel for Virtual Machines
DEFCONFIG="generic_vm_defconfig"
OPENSSL_DIR=${KERNEL_DIR}/../build/build-tools/path/linux-x86/openssl

append_cmd POST_DEFCONFIG_CMDS 'update_signing_keys_config'

function update_signing_keys_config() {
	if test -f "${OPENSSL_DIR}"; then
		${OPENSSL_DIR} req -new -nodes -utf8 -newkey rsa:1024 -days 36500 \
		             -batch -x509 -config ${KERNEL_DIR}/certs/qcom_x509.genkey \
		             -outform PEM -out ${OUT_DIR}/verity_cert.pem -keyout ${OUT_DIR}/verity_key.pem

		${OPENSSL_DIR} req -new -nodes -utf8 -sha256 -days 36500 \
		             -batch -x509 -config ${KERNEL_DIR}/certs/qcom_x509.genkey \
		             -outform PEM -out ${OUT_DIR}/signing_key.pem -keyout ${OUT_DIR}/signing_key.pem

		${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \
		--set-str CONFIG_MODULE_SIG_KEY "${OUT_DIR}/signing_key.pem" \
		--set-str CONFIG_SYSTEM_TRUSTED_KEYS "${OUT_DIR}/verity_cert.pem"

		(cd ${OUT_DIR} && \
		make ${CC_LD_ARG} O=${OUT_DIR} ${MAKE_ARGS} olddefconfig)
	fi
}

append_cmd POST_KERNEL_BUILD_CMDS 'move_signing_keys'

function move_signing_keys() {
  cp ${OUT_DIR}/signing_key.pem ${OUT_DIR}/certs
  cp ${OUT_DIR}/verity_key.pem ${OUT_DIR}/certs
  cp ${OUT_DIR}/verity_cert.pem ${OUT_DIR}/certs
}

function build_defconfig_fragments() {
	if [[ "${VARIANT}" =~ ^(defconfig|debug_defconfig)$ ]]; then
		apply_defconfig_fragment ${KERNEL_DIR}/arch/${ARCH}/configs/vendor/${MSM_ARCH}.config vendor/${MSM_ARCH}_defconfig

		if [ "${VARIANT}" = defconfig ]; then
			return
		fi

		apply_defconfig_fragment ${KERNEL_DIR}/arch/${ARCH}/configs/vendor/${MSM_ARCH}_debug.config vendor/${MSM_ARCH}-debug_defconfig
	else
		echo "Variant '${VARIANT}' unsupported by gki"
		exit 1
	fi
}
build_defconfig_fragments