qemuBuildTPMCommandLine: Generate via JSON

We control only the 'tpmdev' property of TPM devices which is a string.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/qemu/qemu_command.c

@@ -9948,24 +9948,33 @@ qemuBuildDomainLoaderCommandLine(virCommand *cmd,
 }
 
 
-static char *
-qemuBuildTPMDevStr(const virDomainDef *def,
+static int
+qemuBuildTPMDevCmd(virCommand *cmd,
+                   const virDomainDef *def,
                    virDomainTPMDef *tpm,
-                   virQEMUCaps *qemuCaps G_GNUC_UNUSED)
+                   virQEMUCaps *qemuCaps)
 {
-    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
+    g_autoptr(virJSONValue) props = NULL;
     const char *model = virDomainTPMModelTypeToString(tpm->model);
+    g_autofree char *tpmdev = g_strdup_printf("tpm-%s", tpm->info.alias);
 
     if (tpm->model == VIR_DOMAIN_TPM_MODEL_TIS && def->os.arch == VIR_ARCH_AARCH64)
         model = "tpm-tis-device";
 
-    virBufferAsprintf(&buf, "%s,tpmdev=tpm-%s,id=%s",
-                      model, tpm->info.alias, tpm->info.alias);
+    if (virJSONValueObjectCreate(&props,
+                                 "s:driver", model,
+                                 "s:tpmdev", tpmdev,
+                                 "s:id", tpm->info.alias,
+                                 NULL) < 0)
+        return -1;
 
-    if (qemuBuildDeviceAddressStr(&buf, def, &tpm->info) < 0)
-        return NULL;
+    if (qemuBuildDeviceAddressProps(props, def, &tpm->info) < 0)
+        return -1;
 
-    return virBufferContentAndReset(&buf);
+    if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+        return -1;
+
+    return 0;
 }
 
 
@@ -10092,12 +10101,9 @@ qemuBuildTPMCommandLine(virCommand *cmd,
         VIR_FREE(fdset);
     }
 
-    if (!(optstr = qemuBuildTPMDevStr(def, tpm, qemuCaps)))
+    if (qemuBuildTPMDevCmd(cmd, def, tpm, qemuCaps) < 0)
         return -1;
 
-    virCommandAddArgList(cmd, "-device", optstr, NULL);
-    VIR_FREE(optstr);
-
     return 0;
 }
 

tests/qemuxml2argvdata/ppc64-tpmproxy-with-tpm.ppc64-latest.args

@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -device spapr-tpm-proxy,id=tpm0,host-path=/dev/tpmrm0 \
 -tpmdev emulator,id=tpm-tpm1,chardev=chrtpm \
 -chardev socket,id=chrtpm,path=/dev/test \
--device tpm-spapr,tpmdev=tpm-tpm1,id=tpm1,reg=0x00004000 \
+-device tpm-spapr,tpmdev=tpm-tpm1,id=tpm1,reg=16384 \
 -audiodev id=audio1,driver=none \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \

tests/qemuxml2argvdata/tpm-emulator-spapr.ppc64-latest.args

@@ -37,7 +37,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-TPM-VM/.config \
 -device spapr-vty,chardev=charserial1,id=serial1,reg=805310464 \
 -tpmdev emulator,id=tpm-tpm0,chardev=chrtpm \
 -chardev socket,id=chrtpm,path=/dev/test \
--device tpm-spapr,tpmdev=tpm-tpm0,id=tpm0,reg=0x00005000 \
+-device tpm-spapr,tpmdev=tpm-tpm0,id=tpm0,reg=20480 \
 -audiodev id=audio1,driver=none \
 -global spapr-nvram.reg=0x4000 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \