[isar-cip-core][PATCH v7 3/7] start-qemu.sh: Create a tpm2 device

[Jan Kiszka <jan.kiszka@siemens.com>]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This allows testing the partition encryption with qemu.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
[Jan: persist swtpm state aside image in deploy dir]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---

This one became quite different, so sending it as v7.

 start-qemu.sh | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/start-qemu.sh b/start-qemu.sh
index fcfbc5b7..44fb4196 100755
--- a/start-qemu.sh
+++ b/start-qemu.sh
@@ -28,6 +28,9 @@ if grep -s -q "IMAGE_SECURE_BOOT: true" .config.yaml; then
 elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
 	SWUPDATE_BOOT="true"
 fi
+if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
+	TPM2_ENCRYPTION="true"
+fi
 
 if [ -n "${QEMU_PATH}" ]; then
 	QEMU_PATH="${QEMU_PATH}/"
@@ -129,7 +132,8 @@ case "${arch}" in
 		;;
 esac
 
-IMAGE_PREFIX="$(dirname $0)/build/tmp/deploy/images/qemu-${QEMU_ARCH}/${TARGET_IMAGE}-cip-core-${DISTRO_RELEASE}-qemu-${QEMU_ARCH}${TEST_IMAGE}"
+BASE_DIR=$(readlink -f $(dirname $0))
+IMAGE_PREFIX="${BASE_DIR}/build/tmp/deploy/images/qemu-${QEMU_ARCH}/${TARGET_IMAGE}-cip-core-${DISTRO_RELEASE}-qemu-${QEMU_ARCH}${TEST_IMAGE}"
 
 if [ -z "${DISPLAY}" ]; then
 	QEMU_EXTRA_ARGS="${QEMU_EXTRA_ARGS} -nographic"
@@ -143,7 +147,20 @@ QEMU_COMMON_OPTIONS=" \
 	-m 1G \
 	-serial mon:stdio \
 	-netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
-	${QEMU_EXTRA_ARGS}"
+	"
+
+if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
+	SWTPM_DIR="${IMAGE_PREFIX}.swtpm"
+	mkdir -p "${SWTPM_DIR}"
+	if swtpm socket -d --tpmstate dir="${SWTPM_DIR}" \
+			 --ctrl type=unixio,path=/tmp/qemu-swtpm.sock \
+			 --tpm2; then
+		QEMU_EXTRA_ARGS="${QEMU_EXTRA_ARGS} \
+			 -chardev socket,id=chrtpm,path=/tmp/qemu-swtpm.sock \
+			 -tpmdev emulator,id=tpm0,chardev=chrtpm \
+			 -device tpm-tis,tpmdev=tpm0"
+	fi
+fi
 
 if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 	case "${arch}" in
@@ -158,14 +175,14 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
 					-drive if=pflash,format=raw,file=${ovmf_vars} \
 					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
-					${QEMU_COMMON_OPTIONS} "$@"
+					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 			else
 				ovmf_code=${OVMF_CODE:-./build/tmp/deploy/images/qemu-amd64/OVMF/OVMF_CODE_4M.fd}
 
 				${QEMU_PATH}${QEMU} \
 					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
 					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
-					${QEMU_COMMON_OPTIONS} "$@"
+					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 			fi
 			;;
 		arm64|aarch64|arm|armhf)
@@ -174,7 +191,7 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 			${QEMU_PATH}${QEMU} \
 				-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
 				-bios ${u_boot_bin} \
-				${QEMU_COMMON_OPTIONS} "$@"
+				${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 			;;
 		rv64|riscv64)
 			opensbi_bin=${FIRMWARE_BIN:-./build/tmp/deploy/images/qemu-${QEMU_ARCH}/fw_payload.bin}
@@ -199,5 +216,5 @@ else
 			-drive file=${IMAGE_FILE},discard=unmap,if=none,id=disk,format=raw \
 			-kernel ${KERNEL_FILE} -append "${KERNEL_CMDLINE}" \
 			-initrd ${INITRD_FILE} \
-			${QEMU_COMMON_OPTIONS} "$@"
+			${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 fi
-- 
2.35.3