qemu: Build cmd line for pstore device

Nothing special going on here.

Resolves: https://issues.redhat.com/browse/RHEL-24746
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Kristina Hanicova <khanicov@redhat.com>

src/qemu/qemu_alias.c

@@ -658,6 +658,14 @@ qemuAssignDeviceCryptoAlias(virDomainDef *def,
 }
 
 
+static void
+qemuAssignDevicePstoreAlias(virDomainPstoreDef *pstore)
+{
+    if (!pstore->info.alias)
+        pstore->info.alias = g_strdup("pstore0");
+}
+
+
 int
 qemuAssignDeviceAliases(virDomainDef *def)
 {
@@ -747,6 +755,8 @@ qemuAssignDeviceAliases(virDomainDef *def)
     for (i = 0; i < def->ncryptos; i++) {
         qemuAssignDeviceCryptoAlias(def, def->cryptos[i]);
     }
+    if (def->pstore)
+        qemuAssignDevicePstoreAlias(def->pstore);
 
     return 0;
 }

src/qemu/qemu_command.c

@@ -10341,6 +10341,53 @@ qemuBuildCryptoCommandLine(virCommand *cmd,
 }
 
 
+static int
+qemuBuildPstoreCommandLine(virCommand *cmd,
+                           const virDomainDef *def,
+                           virDomainPstoreDef *pstore,
+                           virQEMUCaps *qemuCaps)
+{
+    g_autoptr(virJSONValue) devProps = NULL;
+    g_autoptr(virJSONValue) memProps = NULL;
+    g_autofree char *memAlias = NULL;
+
+    if (!pstore->info.alias) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("pstore device is missing alias"));
+        return -1;
+    }
+
+    memAlias = g_strdup_printf("mem%s", pstore->info.alias);
+
+    if (qemuMonitorCreateObjectProps(&memProps,
+                                     "memory-backend-file",
+                                     memAlias,
+                                     "s:mem-path", pstore->path,
+                                     "U:size", pstore->size * 1024,
+                                     "b:share", true,
+                                     NULL) < 0) {
+        return -1;
+    }
+
+    if (virJSONValueObjectAdd(&devProps,
+                              "s:driver", "acpi-erst",
+                              "s:id", pstore->info.alias,
+                              "s:memdev", memAlias,
+                              NULL) < 0) {
+        return -1;
+    }
+
+    if (qemuBuildDeviceAddressProps(devProps, def, &pstore->info) < 0)
+        return -1;
+
+    if (qemuBuildObjectCommandlineFromJSON(cmd, memProps, qemuCaps) < 0 ||
+        qemuBuildDeviceCommandlineFromJSON(cmd, devProps, def, qemuCaps) < 0)
+        return -1;
+
+    return 0;
+}
+
+
 static int
 qemuBuildAsyncTeardownCommandLine(virCommand *cmd,
                                   const virDomainDef *def,
@@ -10699,6 +10746,10 @@ qemuBuildCommandLine(virDomainObj *vm,
     if (qemuBuildCryptoCommandLine(cmd, def, qemuCaps) < 0)
         return NULL;
 
+    if (def->pstore &&
+        qemuBuildPstoreCommandLine(cmd, def, def->pstore, qemuCaps) < 0)
+        return NULL;
+
     if (qemuBuildAsyncTeardownCommandLine(cmd, def, qemuCaps) < 0)
         return NULL;
 

tests/qemuxmlconfdata/pstore-acpi-erst.x86_64-latest.args

@@ -33,4 +33,6 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
 -global ICH9-LPC.noreboot=off \
 -watchdog-action reset \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-object '{"qom-type":"memory-backend-file","id":"mempstore0","mem-path":"/tmp/guest_acpi_esrt","size":8192,"share":true}' \
+-device '{"driver":"acpi-erst","id":"pstore0","memdev":"mempstore0","bus":"pci.2","addr":"0x1"}' \
 -msg timestamp=on