qemu: Track default-ram-id machine attribute

The machine structure has another (optional) attribute: default-ram-id, which specifies the alias of the default RAM object. While the alias is private, it can never change in order to not break migration. QEMU uses the alias when allocating regular, not NUMA memory. In order to switch to new command line and maintain migration, save this ID. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2024-07-11 12:25:52 +00:00 · 2020-05-25 19:13:43 +02:00 · 2020-05-25 19:13:43 +02:00 · b647654cbb
commit b647654cbb
parent d1ffc8cd3e
8 changed files with 170 additions and 104 deletions
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@ -613,6 +613,7 @@ struct _virQEMUCapsMachineType {
    bool qemuDefault;
    char *defaultCPU;
    bool numaMemSupported;
+    char *defaultRAMid;
 };

 typedef struct _virQEMUCapsHostCPUData virQEMUCapsHostCPUData;
@ -1898,6 +1899,7 @@ virQEMUCapsAccelCopyMachineTypes(virQEMUCapsAccelPtr dst,
        dst->machineTypes[i].hotplugCpus = src->machineTypes[i].hotplugCpus;
        dst->machineTypes[i].qemuDefault = src->machineTypes[i].qemuDefault;
        dst->machineTypes[i].numaMemSupported = src->machineTypes[i].numaMemSupported;
+        dst->machineTypes[i].defaultRAMid = g_strdup(src->machineTypes[i].defaultRAMid);
    }
 }

@ -1975,6 +1977,7 @@ virQEMUCapsAccelClear(virQEMUCapsAccelPtr caps)
        VIR_FREE(caps->machineTypes[i].name);
        VIR_FREE(caps->machineTypes[i].alias);
        VIR_FREE(caps->machineTypes[i].defaultCPU);
+        VIR_FREE(caps->machineTypes[i].defaultRAMid);
    }
    VIR_FREE(caps->machineTypes);

@ -2561,6 +2564,25 @@ virQEMUCapsGetMachineNumaMemSupported(virQEMUCapsPtr qemuCaps,
 }


+const char *
+virQEMUCapsGetMachineDefaultRAMid(virQEMUCapsPtr qemuCaps,
+                                  virDomainVirtType virtType,
+                                  const char *name)
+{
+    virQEMUCapsAccelPtr accel;
+    size_t i;
+
+    accel = virQEMUCapsGetAccel(qemuCaps, virtType);
+
+    for (i = 0; i < accel->nmachineTypes; i++) {
+        if (STREQ(accel->machineTypes[i].name, name))
+            return accel->machineTypes[i].defaultRAMid;
+    }
+
+    return NULL;
+}
+
+
 /**
 * virQEMUCapsSetGICCapabilities:
 * @qemuCaps: QEMU capabilities
@ -2797,7 +2819,8 @@ virQEMUCapsAddMachine(virQEMUCapsPtr qemuCaps,
                      int maxCpus,
                      bool hotplugCpus,
                      bool isDefault,
-                      bool numaMemSupported)
+                      bool numaMemSupported,
+                      const char *defaultRAMid)
 {
    virQEMUCapsAccelPtr accel = virQEMUCapsGetAccel(qemuCaps, virtType);
    virQEMUCapsMachineTypePtr mach;
@ -2818,6 +2841,8 @@ virQEMUCapsAddMachine(virQEMUCapsPtr qemuCaps,
    mach->qemuDefault = isDefault;

    mach->numaMemSupported = numaMemSupported;
+
+    mach->defaultRAMid = g_strdup(defaultRAMid);
 }

 /**
@ -2864,7 +2889,8 @@ virQEMUCapsProbeQMPMachineTypes(virQEMUCapsPtr qemuCaps,
                              machines[i]->maxCpus,
                              machines[i]->hotplugCpus,
                              machines[i]->isDefault,
-                              machines[i]->numaMemSupported);
+                              machines[i]->numaMemSupported,
+                              machines[i]->defaultRAMid);

        if (preferredMachine &&
            (STREQ_NULLABLE(machines[i]->alias, preferredMachine) ||
@ -4091,6 +4117,7 @@ virQEMUCapsLoadMachines(virQEMUCapsAccelPtr caps,
        VIR_FREE(str);

        caps->machineTypes[i].defaultCPU = virXMLPropString(nodes[i], "defaultCPU");
+        caps->machineTypes[i].defaultRAMid = virXMLPropString(nodes[i], "defaultRAMid");
    }

    return 0;
@ -4579,6 +4606,8 @@ virQEMUCapsFormatMachines(virQEMUCapsAccelPtr caps,
                              caps->machineTypes[i].defaultCPU);
        if (caps->machineTypes[i].numaMemSupported)
            virBufferAddLit(buf, " numaMemSupported='yes'");
+        virBufferEscapeString(buf, " defaultRAMid='%s'",
+                              caps->machineTypes[i].defaultRAMid);
        virBufferAddLit(buf, "/>\n");
    }
 }
@ -6388,7 +6417,7 @@ virQEMUCapsStripMachineAliasesForVirtType(virQEMUCapsPtr qemuCaps,
        if (name) {
            virQEMUCapsAddMachine(qemuCaps, virtType, name, NULL, mach->defaultCPU,
                                  mach->maxCpus, mach->hotplugCpus, mach->qemuDefault,
-                                  mach->numaMemSupported);
+                                  mach->numaMemSupported, mach->defaultRAMid);
        }
    }
 }
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@ -691,6 +691,9 @@ const char *virQEMUCapsGetMachineDefaultCPU(virQEMUCapsPtr qemuCaps,
 bool virQEMUCapsGetMachineNumaMemSupported(virQEMUCapsPtr qemuCaps,
                                           virDomainVirtType virtType,
                                           const char *name);
+const char *virQEMUCapsGetMachineDefaultRAMid(virQEMUCapsPtr qemuCaps,
+                                              virDomainVirtType virtType,
+                                              const char *name);

 void virQEMUCapsFilterByMachineType(virQEMUCapsPtr qemuCaps,
                                    virDomainVirtType virtType,
--- a/src/qemu/qemu_capspriv.h
+++ b/src/qemu/qemu_capspriv.h
@ -119,4 +119,5 @@ virQEMUCapsAddMachine(virQEMUCapsPtr qemuCaps,
                      int maxCpus,
                      bool hotplugCpus,
                      bool isDefault,
-                      bool numaMemSupported);
+                      bool numaMemSupported,
+                      const char *defaultRAMid);
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@ -3540,6 +3540,7 @@ qemuMonitorMachineInfoFree(qemuMonitorMachineInfoPtr machine)
    VIR_FREE(machine->name);
    VIR_FREE(machine->alias);
    VIR_FREE(machine->defaultCPU);
+    VIR_FREE(machine->defaultRAMid);
    VIR_FREE(machine);
 }

--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@ -1106,6 +1106,7 @@ struct _qemuMonitorMachineInfo {
    bool hotplugCpus;
    char *defaultCPU;
    bool numaMemSupported;
+    char *defaultRAMid;
 };

 int qemuMonitorGetMachines(qemuMonitorPtr mon,
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@ -5641,6 +5641,17 @@ int qemuMonitorJSONGetMachines(qemuMonitorPtr mon,
        } else {
            info->numaMemSupported = true;
        }
+
+        if (virJSONValueObjectHasKey(child, "default-ram-id")) {
+            if (!(tmp = virJSONValueObjectGetString(child, "default-ram-id"))) {
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                               _("query-machines reply has malformed "
+                                 "'default-ram-id' data"));
+                goto cleanup;
+            }
+
+            info->defaultRAMid = g_strdup(tmp);
+        }
    }

    ret = n;
--- a/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
@ -1405,55 +1405,55 @@
  </cpu>
  <cpu type='kvm' name='486-v1' typename='486-v1-x86_64-cpu' usable='yes'/>
  <cpu type='kvm' name='486' typename='486-x86_64-cpu' usable='yes'/>
-  <machine type='kvm' name='pc-i440fx-5.2' alias='pc' hotplugCpus='yes' maxCpus='255' default='yes' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='kvm' name='pc-q35-5.2' alias='q35' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='kvm' name='pc-i440fx-2.12' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-4.2' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-4.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-1.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-1.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.10' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-1.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-5.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='kvm' name='pc-q35-2.9' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.11' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-3.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-4.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-1.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-4.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-5.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='kvm' name='pc-i440fx-2.9' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='isapc' hotplugCpus='yes' maxCpus='1' defaultCPU='486-x86_64-cpu'/>
-  <machine type='kvm' name='pc-i440fx-1.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-3.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.12' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-1.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-4.0.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-1.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-5.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.8' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.10' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-3.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-4.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='microvm' maxCpus='288' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='kvm' name='pc-i440fx-2.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-1.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-4.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-5.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-2.8' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-i440fx-3.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='kvm' name='pc-q35-2.11' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
+  <machine type='kvm' name='pc-i440fx-5.2' alias='pc' hotplugCpus='yes' maxCpus='255' default='yes' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-5.2' alias='q35' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.12' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-4.2' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-4.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-1.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-1.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.10' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-1.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-5.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.9' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.11' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-3.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-4.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-1.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-4.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-5.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.9' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='isapc' hotplugCpus='yes' maxCpus='1' defaultCPU='486-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-1.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-3.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.12' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-1.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-4.0.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-1.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-5.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.8' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.10' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-3.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-4.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='microvm' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='microvm.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-1.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-4.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-5.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-2.8' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-i440fx-3.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='kvm' name='pc-q35-2.11' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
  <hostCPU type='tcg' model='base' migratability='yes'>
    <property name='vmx-entry-load-rtit-ctl' type='boolean' value='false'/>
    <property name='cmov' type='boolean' value='true' migratable='yes'/>
@ -3142,53 +3142,53 @@
  </cpu>
  <cpu type='tcg' name='486-v1' typename='486-v1-x86_64-cpu' usable='yes'/>
  <cpu type='tcg' name='486' typename='486-x86_64-cpu' usable='yes'/>
-  <machine type='tcg' name='pc-i440fx-5.2' alias='pc' hotplugCpus='yes' maxCpus='255' default='yes' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='tcg' name='pc-q35-5.2' alias='q35' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='tcg' name='pc-i440fx-2.12' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-4.2' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-4.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-1.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-1.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.10' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-1.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-5.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='tcg' name='pc-q35-2.9' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.11' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-3.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-4.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-1.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-4.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-5.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='tcg' name='pc-i440fx-2.9' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='isapc' hotplugCpus='yes' maxCpus='1' defaultCPU='486-x86_64-cpu'/>
-  <machine type='tcg' name='pc-i440fx-1.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-3.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.12' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-1.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-4.0.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-1.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-5.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.8' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.10' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-3.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-4.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='microvm' maxCpus='288' defaultCPU='qemu64-x86_64-cpu'/>
-  <machine type='tcg' name='pc-i440fx-2.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-1.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-4.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-5.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-2.8' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-i440fx-3.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
-  <machine type='tcg' name='pc-q35-2.11' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes'/>
+  <machine type='tcg' name='pc-i440fx-5.2' alias='pc' hotplugCpus='yes' maxCpus='255' default='yes' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-5.2' alias='q35' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.12' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-4.2' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-4.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-1.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-1.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.10' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-1.7' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-5.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.9' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.11' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-3.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-4.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-1.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-4.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-5.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.9' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='isapc' hotplugCpus='yes' maxCpus='1' defaultCPU='486-x86_64-cpu' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-1.4' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-3.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.12' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.1' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-1.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-4.0.1' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-1.6' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-5.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.8' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.10' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-3.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-4.0' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='microvm' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' defaultRAMid='microvm.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.3' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-1.2' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-4.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-5.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-2.8' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.5' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-i440fx-3.0' hotplugCpus='yes' maxCpus='255' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
+  <machine type='tcg' name='pc-q35-2.11' hotplugCpus='yes' maxCpus='288' defaultCPU='qemu64-x86_64-cpu' numaMemSupported='yes' defaultRAMid='pc.ram'/>
 </qemuCaps>
--- a/tests/testutilsqemu.c
+++ b/tests/testutilsqemu.c
@ -99,6 +99,15 @@ static const char *const *kvm_machines[VIR_ARCH_LAST] = {
    [VIR_ARCH_S390X] = s390x_machines,
 };

+static const char *qemu_default_ram_id[VIR_ARCH_LAST] = {
+    [VIR_ARCH_I686] = "pc.ram",
+    [VIR_ARCH_X86_64] = "pc.ram",
+    [VIR_ARCH_AARCH64] = "mach-virt.ram",
+    [VIR_ARCH_ARMV7L] = "vexpress.highmem",
+    [VIR_ARCH_PPC64] = "ppc_spapr.ram",
+    [VIR_ARCH_PPC] = "ppc_spapr.ram",
+    [VIR_ARCH_S390X] = "s390.ram"
+};

 char *
 virFindFileInPath(const char *file)
@ -331,7 +340,16 @@ int qemuTestCapsCacheInsert(virFileCachePtr cache,
        }

        if (!virQEMUCapsHasMachines(tmpCaps)) {
+            const char *defaultRAMid = NULL;
+
+            /* default-ram-id appeared in QEMU 5.2.0. Reflect
+             * this in our capabilities, i.e. set it for new
+             * enough versions only. */
+            if (virQEMUCapsGetVersion(tmpCaps) >= 5002000)
+                defaultRAMid = qemu_default_ram_id[i];
+
            virQEMUCapsSetArch(tmpCaps, i);
+
            for (j = 0; qemu_machines[i][j] != NULL; j++) {
                virQEMUCapsAddMachine(tmpCaps,
                                      VIR_DOMAIN_VIRT_QEMU,
@ -341,7 +359,8 @@ int qemuTestCapsCacheInsert(virFileCachePtr cache,
                                      0,
                                      false,
                                      false,
-                                      true);
+                                      true,
+                                      defaultRAMid);
                virQEMUCapsSet(tmpCaps, QEMU_CAPS_TCG);
            }
            for (j = 0; kvm_machines[i][j] != NULL; j++) {
@ -353,7 +372,8 @@ int qemuTestCapsCacheInsert(virFileCachePtr cache,
                                      0,
                                      false,
                                      false,
-                                      true);
+                                      true,
+                                      defaultRAMid);
                virQEMUCapsSet(tmpCaps, QEMU_CAPS_KVM);
            }
        }