tests: Add tests for QEMU command line generation with encrypted TPM

The QEMU command line does not change when TPM state is encrypted
compared to when it is plain.
Signed-off-by: NStefan Berger <stefanb@linux.ibm.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args

+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-TPM-VM \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-TPM-VM/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-TPM-VM/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-TPM-VM/.config \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name guest=TPM-VM,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-TPM-VM/master-key.aes \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off \
+-m 2048 \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 11d7cd22-da89-3094-6212-079a48a309a1 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot menu=on,strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-tpmdev emulator,id=tpm-tpm0,chardev=chrtpm \
+-chardev socket,id=chrtpm,path=/dev/test \
+-device tpm-tis,tpmdev=tpm-tpm0,id=tpm0 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
+resourcecontrol=deny \
+-msg timestamp=on

tests/qemuxml2argvtest.c

@@ -2107,6 +2107,7 @@ mymain(void)
                         QEMU_CAPS_DEVICE_TPM_PASSTHROUGH, QEMU_CAPS_DEVICE_TPM_TIS);
     DO_TEST_CAPS_LATEST("tpm-emulator");
     DO_TEST_CAPS_LATEST("tpm-emulator-tpm2");
+    DO_TEST_CAPS_LATEST("tpm-emulator-tpm2-enc");
 
     DO_TEST_PARSE_ERROR("pci-domain-invalid", NONE);
     DO_TEST_PARSE_ERROR("pci-bus-invalid", NONE);