diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 30a4dc302f..e9ba81d82f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6829,6 +6829,7 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
     virTristateSwitch vmport = def->features[VIR_DOMAIN_FEATURE_VMPORT];
     virTristateSwitch smm = def->features[VIR_DOMAIN_FEATURE_SMM];
     virCPUDefPtr cpu = def->cpu;
+    const char *defaultRAMid = NULL;
     g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
     size_t i;
 
@@ -7045,6 +7046,12 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
     if (virDomainNumaHasHMAT(def->numa))
         virBufferAddLit(&buf, ",hmat=on");
 
+    defaultRAMid = virQEMUCapsGetMachineDefaultRAMid(qemuCaps,
+                                                     def->virtType,
+                                                     def->os.machine);
+    if (defaultRAMid)
+        virBufferAsprintf(&buf, ",memory-backend=%s", defaultRAMid);
+
     virCommandAddArgBuffer(cmd, &buf);
 
     return 0;
@@ -7154,12 +7161,42 @@ qemuBuildMemPathStr(const virDomainDef *def,
 }
 
 
+static int
+qemuBuildMemCommandLineMemoryDefaultBackend(virCommandPtr cmd,
+                                            const virDomainDef *def,
+                                            qemuDomainObjPrivatePtr priv,
+                                            const char *defaultRAMid)
+{
+    g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(priv->driver);
+    g_autoptr(virJSONValue) props = NULL;
+    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
+    virDomainMemoryDef mem = { 0 };
+
+    mem.size = virDomainDefGetMemoryInitial(def);
+    mem.targetNode = -1;
+    mem.info.alias = (char *) defaultRAMid;
+
+    if (qemuBuildMemoryBackendProps(&props, defaultRAMid, cfg,
+                                    priv, def, &mem, false) < 0)
+        return -1;
+
+    if (virQEMUBuildObjectCommandlineFromJSON(&buf, props) < 0)
+        return -1;
+
+    virCommandAddArg(cmd, "-object");
+    virCommandAddArgBuffer(cmd, &buf);
+    return 0;
+}
+
+
 static int
 qemuBuildMemCommandLine(virCommandPtr cmd,
                         const virDomainDef *def,
                         virQEMUCapsPtr qemuCaps,
                         qemuDomainObjPrivatePtr priv)
 {
+    const char *defaultRAMid = NULL;
+
     virCommandAddArg(cmd, "-m");
 
     if (virDomainDefHasMemoryHotplug(def)) {
@@ -7174,18 +7211,26 @@ qemuBuildMemCommandLine(virCommandPtr cmd,
                               virDomainDefGetMemoryInitial(def) / 1024);
     }
 
-    if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE) {
-        virCommandAddArgList(cmd, "-mem-prealloc", NULL);
-        priv->memPrealloc = true;
-    }
+    defaultRAMid = virQEMUCapsGetMachineDefaultRAMid(qemuCaps,
+                                                     def->virtType,
+                                                     def->os.machine);
 
-    /*
-     * Add '-mem-path' (and '-mem-prealloc') parameter here if
-     * the hugepages and no numa node is specified.
-     */
-    if (!virDomainNumaGetNodeCount(def->numa) &&
-        qemuBuildMemPathStr(def, cmd, priv) < 0)
-        return -1;
+    if (defaultRAMid) {
+        qemuBuildMemCommandLineMemoryDefaultBackend(cmd, def, priv, defaultRAMid);
+    } else {
+        if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE) {
+            virCommandAddArgList(cmd, "-mem-prealloc", NULL);
+            priv->memPrealloc = true;
+        }
+
+        /*
+         * Add '-mem-path' (and '-mem-prealloc') parameter here if
+         * the hugepages and no numa node is specified.
+         */
+        if (!virDomainNumaGetNodeCount(def->numa) &&
+            qemuBuildMemPathStr(def, cmd, priv) < 0)
+            return -1;
+    }
 
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_OVERCOMMIT)) {
         virCommandAddArg(cmd, "-overcommit");
diff --git a/tests/qemuxml2argvdata/blkdeviotune-group-num.x86_64-latest.args b/tests/qemuxml2argvdata/blkdeviotune-group-num.x86_64-latest.args
index fe8a845aae..79012e5b60 100644
--- a/tests/qemuxml2argvdata/blkdeviotune-group-num.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/blkdeviotune-group-num.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/blkdeviotune-max-length.x86_64-latest.args b/tests/qemuxml2argvdata/blkdeviotune-max-length.x86_64-latest.args
index fe8a845aae..79012e5b60 100644
--- a/tests/qemuxml2argvdata/blkdeviotune-max-length.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/blkdeviotune-max-length.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/blkdeviotune-max.x86_64-latest.args b/tests/qemuxml2argvdata/blkdeviotune-max.x86_64-latest.args
index fe8a845aae..79012e5b60 100644
--- a/tests/qemuxml2argvdata/blkdeviotune-max.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/blkdeviotune-max.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/channel-unix-guestfwd.x86_64-latest.args b/tests/qemuxml2argvdata/channel-unix-guestfwd.x86_64-latest.args
index 95ac94ab7d..f500bfe2ae 100644
--- a/tests/qemuxml2argvdata/channel-unix-guestfwd.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/channel-unix-guestfwd.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/console-virtio-unix.x86_64-latest.args b/tests/qemuxml2argvdata/console-virtio-unix.x86_64-latest.args
index dbad074eb3..5e64598959 100644
--- a/tests/qemuxml2argvdata/console-virtio-unix.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/console-virtio-unix.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/controller-virtio-scsi.x86_64-latest.args b/tests/qemuxml2argvdata/controller-virtio-scsi.x86_64-latest.args
index 454da17e2c..1d7583b981 100644
--- a/tests/qemuxml2argvdata/controller-virtio-scsi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/controller-virtio-scsi.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 8,sockets=8,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/cpu-Icelake-Server-pconfig.x86_64-latest.args b/tests/qemuxml2argvdata/cpu-Icelake-Server-pconfig.x86_64-latest.args
index 88d05a482a..a512623af6 100644
--- a/tests/qemuxml2argvdata/cpu-Icelake-Server-pconfig.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/cpu-Icelake-Server-pconfig.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu Icelake-Server \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args b/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
index 9322b826f4..84c0d05b34 100644
--- a/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
@@ -12,11 +12,12 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,\
 cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,kvm-pv-eoi=on,\
 kvm-pv-unhalt=on \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-fade-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/cputune-cpuset-big-id.x86_64-latest.args b/tests/qemuxml2argvdata/cputune-cpuset-big-id.x86_64-latest.args
index b086ebe776..0ec8ba038d 100644
--- a/tests/qemuxml2argvdata/cputune-cpuset-big-id.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/cputune-cpuset-big-id.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-aio-io_uring.x86_64-latest.args b/tests/qemuxml2argvdata/disk-aio-io_uring.x86_64-latest.args
index 8596639f60..69c8742e95 100644
--- a/tests/qemuxml2argvdata/disk-aio-io_uring.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-aio-io_uring.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-aio.x86_64-latest.args b/tests/qemuxml2argvdata/disk-aio.x86_64-latest.args
index 487018cf3e..6f9b81071a 100644
--- a/tests/qemuxml2argvdata/disk-aio.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-aio.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-backing-chains-noindex.x86_64-latest.args b/tests/qemuxml2argvdata/disk-backing-chains-noindex.x86_64-latest.args
index 6e01f55577..0f6d70a855 100644
--- a/tests/qemuxml2argvdata/disk-backing-chains-noindex.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-backing-chains-noindex.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-cache.x86_64-latest.args b/tests/qemuxml2argvdata/disk-cache.x86_64-latest.args
index 931e344028..e66abd9d4f 100644
--- a/tests/qemuxml2argvdata/disk-cache.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-cache.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc-i440fx-1.5,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-i440fx-1.5,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-cdrom-bus-other.x86_64-latest.args b/tests/qemuxml2argvdata/disk-cdrom-bus-other.x86_64-latest.args
index be091f150f..a77a851941 100644
--- a/tests/qemuxml2argvdata/disk-cdrom-bus-other.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-cdrom-bus-other.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-cdrom-empty-network-invalid.x86_64-latest.args b/tests/qemuxml2argvdata/disk-cdrom-empty-network-invalid.x86_64-latest.args
index 81f250600e..94ffa9f9e4 100644
--- a/tests/qemuxml2argvdata/disk-cdrom-empty-network-invalid.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-cdrom-empty-network-invalid.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-cdrom-network.x86_64-latest.args b/tests/qemuxml2argvdata/disk-cdrom-network.x86_64-latest.args
index 1a102949df..3c4f3993f6 100644
--- a/tests/qemuxml2argvdata/disk-cdrom-network.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-cdrom-network.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc-1.2,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc-1.2,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-cdrom-tray.x86_64-latest.args b/tests/qemuxml2argvdata/disk-cdrom-tray.x86_64-latest.args
index 3e56168acb..4e4e0aa62a 100644
--- a/tests/qemuxml2argvdata/disk-cdrom-tray.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-cdrom-tray.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 3fa02811-7832-34bd-004d-1ff56a9286ff \
diff --git a/tests/qemuxml2argvdata/disk-cdrom.x86_64-latest.args b/tests/qemuxml2argvdata/disk-cdrom.x86_64-latest.args
index 9c8097c4a6..0d375ffd1c 100644
--- a/tests/qemuxml2argvdata/disk-cdrom.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-cdrom.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args b/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args
index 701038404d..493b478cf8 100644
--- a/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 468404ad-d49c-40f2-9e14-02294f9c1be3 \
diff --git a/tests/qemuxml2argvdata/disk-detect-zeroes.x86_64-latest.args b/tests/qemuxml2argvdata/disk-detect-zeroes.x86_64-latest.args
index 8e8d92a6f7..97cc49225f 100644
--- a/tests/qemuxml2argvdata/disk-detect-zeroes.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-detect-zeroes.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 92d7a226-cfae-425b-a6d3-00bbf9ec5c9e \
diff --git a/tests/qemuxml2argvdata/disk-discard.x86_64-latest.args b/tests/qemuxml2argvdata/disk-discard.x86_64-latest.args
index 408124dc95..1aa06c7469 100644
--- a/tests/qemuxml2argvdata/disk-discard.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-discard.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 92d7a226-cfae-425b-a6d3-00bbf9ec5c9e \
diff --git a/tests/qemuxml2argvdata/disk-error-policy.x86_64-latest.args b/tests/qemuxml2argvdata/disk-error-policy.x86_64-latest.args
index e8f5ea10df..c0079efc0a 100644
--- a/tests/qemuxml2argvdata/disk-error-policy.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-error-policy.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-floppy-q35-2_11.x86_64-latest.args b/tests/qemuxml2argvdata/disk-floppy-q35-2_11.x86_64-latest.args
index a624998480..7e35f6a6cd 100644
--- a/tests/qemuxml2argvdata/disk-floppy-q35-2_11.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-floppy-q35-2_11.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc-q35-2.11,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-q35-2.11,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-floppy-q35-2_9.x86_64-latest.args b/tests/qemuxml2argvdata/disk-floppy-q35-2_9.x86_64-latest.args
index ec3210cdc8..47ef5db354 100644
--- a/tests/qemuxml2argvdata/disk-floppy-q35-2_9.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-floppy-q35-2_9.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc-q35-2.9,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-q35-2.9,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-floppy.x86_64-latest.args b/tests/qemuxml2argvdata/disk-floppy.x86_64-latest.args
index fbca6c90ec..96756502df 100644
--- a/tests/qemuxml2argvdata/disk-floppy.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-floppy.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-gluster.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-gluster.x86_64-latest.args
index 4e68f1b628..1e992fb6d0 100644
--- a/tests/qemuxml2argvdata/disk-network-gluster.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-gluster.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-http.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-http.x86_64-latest.args
index 814f747dad..954f1824dd 100644
--- a/tests/qemuxml2argvdata/disk-network-http.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-http.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-iscsi.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-iscsi.x86_64-latest.args
index 9848128092..ab60fc5f4a 100644
--- a/tests/qemuxml2argvdata/disk-network-iscsi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-iscsi.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-nbd.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-nbd.x86_64-latest.args
index 8c9bbed130..5e5c23656a 100644
--- a/tests/qemuxml2argvdata/disk-network-nbd.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-nbd.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-rbd.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-rbd.x86_64-latest.args
index 29409df722..e91f009d35 100644
--- a/tests/qemuxml2argvdata/disk-network-rbd.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-rbd.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-sheepdog.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-sheepdog.x86_64-latest.args
index a5e197f45b..4418906dc7 100644
--- a/tests/qemuxml2argvdata/disk-network-sheepdog.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-sheepdog.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-source-auth.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-source-auth.x86_64-latest.args
index 0ad49ab0fd..257ca1376c 100644
--- a/tests/qemuxml2argvdata/disk-network-source-auth.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-source-auth.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-network-tlsx509-nbd.x86_64-latest.args b/tests/qemuxml2argvdata/disk-network-tlsx509-nbd.x86_64-latest.args
index b44832b5e5..8ec4a8ab22 100644
--- a/tests/qemuxml2argvdata/disk-network-tlsx509-nbd.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-network-tlsx509-nbd.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-nvme.x86_64-latest.args b/tests/qemuxml2argvdata/disk-nvme.x86_64-latest.args
index a0b5c5950c..3146ad1251 100644
--- a/tests/qemuxml2argvdata/disk-nvme.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-nvme.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-readonly-disk.x86_64-latest.args b/tests/qemuxml2argvdata/disk-readonly-disk.x86_64-latest.args
index f67ebf0069..7a83ac4afe 100644
--- a/tests/qemuxml2argvdata/disk-readonly-disk.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-readonly-disk.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-scsi-device-auto.x86_64-latest.args b/tests/qemuxml2argvdata/disk-scsi-device-auto.x86_64-latest.args
index 634d929a01..354686c5fa 100644
--- a/tests/qemuxml2argvdata/disk-scsi-device-auto.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-scsi-device-auto.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-scsi.x86_64-latest.args b/tests/qemuxml2argvdata/disk-scsi.x86_64-latest.args
index 489f53d80e..da4ef333c0 100644
--- a/tests/qemuxml2argvdata/disk-scsi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-scsi.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-shared.x86_64-latest.args b/tests/qemuxml2argvdata/disk-shared.x86_64-latest.args
index 4bae8ae5c9..4cae79c005 100644
--- a/tests/qemuxml2argvdata/disk-shared.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-shared.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-slices.x86_64-latest.args b/tests/qemuxml2argvdata/disk-slices.x86_64-latest.args
index cd2f5847c4..c4e1384f4d 100644
--- a/tests/qemuxml2argvdata/disk-slices.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-slices.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-transient.x86_64-latest.args b/tests/qemuxml2argvdata/disk-transient.x86_64-latest.args
index 1b9c64c96a..eea8560699 100644
--- a/tests/qemuxml2argvdata/disk-transient.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-transient.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/disk-virtio-scsi-reservations.x86_64-latest.args b/tests/qemuxml2argvdata/disk-virtio-scsi-reservations.x86_64-latest.args
index bfd7a92530..a6e6c12d65 100644
--- a/tests/qemuxml2argvdata/disk-virtio-scsi-reservations.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/disk-virtio-scsi-reservations.x86_64-latest.args
@@ -14,9 +14,10 @@ QEMU_AUDIO_DRV=none \
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -object pr-manager-helper,id=pr-helper0,\
 path=/tmp/lib/domain--1-QEMUGuest1/pr-helper0.sock \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 8,sockets=8,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/eoi-disabled.x86_64-latest.args b/tests/qemuxml2argvdata/eoi-disabled.x86_64-latest.args
index c34f2e78c2..a2593d155a 100644
--- a/tests/qemuxml2argvdata/eoi-disabled.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/eoi-disabled.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,kvm-pv-eoi=off \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/eoi-enabled.x86_64-latest.args b/tests/qemuxml2argvdata/eoi-enabled.x86_64-latest.args
index 2ee3ef5031..d0befba30f 100644
--- a/tests/qemuxml2argvdata/eoi-enabled.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/eoi-enabled.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,kvm-pv-eoi=on \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/floppy-drive-fat.x86_64-latest.args b/tests/qemuxml2argvdata/floppy-drive-fat.x86_64-latest.args
index c47f2ea717..12f0b9cb64 100644
--- a/tests/qemuxml2argvdata/floppy-drive-fat.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/floppy-drive-fat.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/fs9p.x86_64-latest.args b/tests/qemuxml2argvdata/fs9p.x86_64-latest.args
index 700ae69203..e340218e1a 100644
--- a/tests/qemuxml2argvdata/fs9p.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/fs9p.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/genid-auto.x86_64-latest.args b/tests/qemuxml2argvdata/genid-auto.x86_64-latest.args
index 7c39132ff8..8f08342a0b 100644
--- a/tests/qemuxml2argvdata/genid-auto.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/genid-auto.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/genid.x86_64-latest.args b/tests/qemuxml2argvdata/genid.x86_64-latest.args
index 5bfb8db9f9..7dd7d1f616 100644
--- a/tests/qemuxml2argvdata/genid.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/genid.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/graphics-egl-headless-rendernode.x86_64-latest.args b/tests/qemuxml2argvdata/graphics-egl-headless-rendernode.x86_64-latest.args
index 390a8d16b7..e6025557da 100644
--- a/tests/qemuxml2argvdata/graphics-egl-headless-rendernode.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/graphics-egl-headless-rendernode.x86_64-latest.args
@@ -11,9 +11,10 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/graphics-egl-headless.x86_64-latest.args b/tests/qemuxml2argvdata/graphics-egl-headless.x86_64-latest.args
index 390a8d16b7..e6025557da 100644
--- a/tests/qemuxml2argvdata/graphics-egl-headless.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/graphics-egl-headless.x86_64-latest.args
@@ -11,9 +11,10 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-gl-auto-rendernode.x86_64-latest.args b/tests/qemuxml2argvdata/graphics-spice-gl-auto-rendernode.x86_64-latest.args
index c0d08964d6..9329e56b12 100644
--- a/tests/qemuxml2argvdata/graphics-spice-gl-auto-rendernode.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/graphics-spice-gl-auto-rendernode.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=spice \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/graphics-vnc-tls-secret.x86_64-latest.args b/tests/qemuxml2argvdata/graphics-vnc-tls-secret.x86_64-latest.args
index 5a73408bf9..b3251fbed4 100644
--- a/tests/qemuxml2argvdata/graphics-vnc-tls-secret.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/graphics-vnc-tls-secret.x86_64-latest.args
@@ -13,9 +13,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/graphics-vnc-tls.x86_64-latest.args b/tests/qemuxml2argvdata/graphics-vnc-tls.x86_64-latest.args
index f435b9a152..cea42c4d1b 100644
--- a/tests/qemuxml2argvdata/graphics-vnc-tls.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/graphics-vnc-tls.x86_64-latest.args
@@ -13,9 +13,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-mdev-display-ramfb.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-mdev-display-ramfb.x86_64-latest.args
index bb12d314b9..f1a3026474 100644
--- a/tests/qemuxml2argvdata/hostdev-mdev-display-ramfb.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-mdev-display-ramfb.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-mdev-display-spice-egl-headless.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-mdev-display-spice-egl-headless.x86_64-latest.args
index 090b644abb..580cbd9489 100644
--- a/tests/qemuxml2argvdata/hostdev-mdev-display-spice-egl-headless.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-mdev-display-spice-egl-headless.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=spice \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-mdev-display-spice-opengl.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-mdev-display-spice-opengl.x86_64-latest.args
index 201ccccc7f..345bddfc43 100644
--- a/tests/qemuxml2argvdata/hostdev-mdev-display-spice-opengl.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-mdev-display-spice-opengl.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=spice \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-mdev-display-vnc-egl-headless.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-mdev-display-vnc-egl-headless.x86_64-latest.args
index 0809fdce45..cef437a228 100644
--- a/tests/qemuxml2argvdata/hostdev-mdev-display-vnc-egl-headless.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-mdev-display-vnc-egl-headless.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-mdev-display-vnc.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-mdev-display-vnc.x86_64-latest.args
index 58a7549935..68c28fc41e 100644
--- a/tests/qemuxml2argvdata/hostdev-mdev-display-vnc.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-mdev-display-vnc.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-scsi-lsi.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-scsi-lsi.x86_64-latest.args
index a5b200543a..89e83e3a2f 100644
--- a/tests/qemuxml2argvdata/hostdev-scsi-lsi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-scsi-lsi.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9466-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args
index bd0d790b08..c00ef41bf2 100644
--- a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest2/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9466-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args b/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
index 969bb713b5..192b033e9e 100644
--- a/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
@@ -12,9 +12,13 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=1048576k,slots=16,maxmem=1099511627776k \
+-object memory-backend-file,id=pc.ram,\
+mem-path=/dev/hugepages2M/libvirt/qemu/-1-QEMUGuest1,share=yes,prealloc=yes,\
+size=1073741824 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-file,id=ram-node0,\
diff --git a/tests/qemuxml2argvdata/hyperv-off.x86_64-latest.args b/tests/qemuxml2argvdata/hyperv-off.x86_64-latest.args
index ea3fc775bb..ce7af1bd3a 100644
--- a/tests/qemuxml2argvdata/hyperv-off.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hyperv-off.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hyperv-panic.x86_64-latest.args b/tests/qemuxml2argvdata/hyperv-panic.x86_64-latest.args
index 41527208ab..870fa38d82 100644
--- a/tests/qemuxml2argvdata/hyperv-panic.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hyperv-panic.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,hv-crash \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hyperv-stimer-direct.x86_64-latest.args b/tests/qemuxml2argvdata/hyperv-stimer-direct.x86_64-latest.args
index bdcf33c1bf..f64bad579d 100644
--- a/tests/qemuxml2argvdata/hyperv-stimer-direct.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hyperv-stimer-direct.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,hv-vpindex,hv-synic,hv-stimer,hv-stimer-direct \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hyperv.x86_64-latest.args b/tests/qemuxml2argvdata/hyperv.x86_64-latest.args
index 7382553860..c6cba06981 100644
--- a/tests/qemuxml2argvdata/hyperv.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hyperv.x86_64-latest.args
@@ -12,11 +12,12 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu 'qemu64,hv-relaxed,hv-vapic,hv-spinlocks=0x2fff,hv-vpindex,hv-runtime,\
 hv-synic,hv-stimer,hv-reset,hv-vendor-id=KVM Hv,hv-frequencies,\
 hv-reenlightenment,hv-tlbflush,hv-ipi,hv-evmcs' \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/intel-iommu-aw-bits.x86_64-latest.args b/tests/qemuxml2argvdata/intel-iommu-aw-bits.x86_64-latest.args
index 0ce0952b51..211ea3d572 100644
--- a/tests/qemuxml2argvdata/intel-iommu-aw-bits.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/intel-iommu-aw-bits.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split \
+-machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/intel-iommu-caching-mode.x86_64-latest.args b/tests/qemuxml2argvdata/intel-iommu-caching-mode.x86_64-latest.args
index c232121595..cea414a7f5 100644
--- a/tests/qemuxml2argvdata/intel-iommu-caching-mode.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/intel-iommu-caching-mode.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split \
+-machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/intel-iommu-device-iotlb.x86_64-latest.args b/tests/qemuxml2argvdata/intel-iommu-device-iotlb.x86_64-latest.args
index addb45a0b3..ef2fa61db8 100644
--- a/tests/qemuxml2argvdata/intel-iommu-device-iotlb.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/intel-iommu-device-iotlb.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split \
+-machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/intel-iommu-eim.x86_64-latest.args b/tests/qemuxml2argvdata/intel-iommu-eim.x86_64-latest.args
index 98650baaaa..43e666d14f 100644
--- a/tests/qemuxml2argvdata/intel-iommu-eim.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/intel-iommu-eim.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split \
+-machine q35,accel=kvm,usb=off,dump-guest-core=off,kernel_irqchip=split,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 288,sockets=288,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/intel-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/intel-iommu.x86_64-latest.args
index 92d25f6d41..5fe3ed0c26 100644
--- a/tests/qemuxml2argvdata/intel-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/intel-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/iothreads-virtio-scsi-pci.x86_64-latest.args b/tests/qemuxml2argvdata/iothreads-virtio-scsi-pci.x86_64-latest.args
index d00867a09b..a2f4d5e609 100644
--- a/tests/qemuxml2argvdata/iothreads-virtio-scsi-pci.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/iothreads-virtio-scsi-pci.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,cores=1,threads=1 \
 -object iothread,id=iothread1 \
diff --git a/tests/qemuxml2argvdata/kvmclock+eoi-disabled.x86_64-latest.args b/tests/qemuxml2argvdata/kvmclock+eoi-disabled.x86_64-latest.args
index c4cd5f5beb..8842d2a448 100644
--- a/tests/qemuxml2argvdata/kvmclock+eoi-disabled.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/kvmclock+eoi-disabled.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,kvmclock=off,kvm-pv-eoi=off \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/luks-disks-source-qcow2.x86_64-latest.args b/tests/qemuxml2argvdata/luks-disks-source-qcow2.x86_64-latest.args
index 3ce9f81006..6e469d1953 100644
--- a/tests/qemuxml2argvdata/luks-disks-source-qcow2.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/luks-disks-source-qcow2.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-encryptdisk/master-key.aes \
--machine pc-i440fx-2.1,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-i440fx-2.1,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 496898a6-e6ff-f7c8-5dc2-3cf410945ee9 \
diff --git a/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args b/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
index 5d256c42bc..b43e7d9c3c 100644
--- a/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
@@ -12,14 +12,16 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-instance-00000092/master-key.aes \
--machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 14336 \
--mem-prealloc \
+-object memory-backend-memfd,id=pc.ram,hugetlb=yes,hugetlbsize=2097152,\
+share=yes,prealloc=yes,size=15032385536 \
 -overcommit mem-lock=off \
 -smp 8,sockets=1,dies=1,cores=8,threads=1 \
 -object memory-backend-memfd,id=ram-node0,hugetlb=yes,hugetlbsize=2097152,\
-share=yes,size=15032385536,host-nodes=3,policy=preferred \
+share=yes,prealloc=yes,size=15032385536,host-nodes=3,policy=preferred \
 -numa node,nodeid=0,cpus=0-7,memdev=ram-node0 \
 -uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \
 -display none \
diff --git a/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args b/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
index 5d256c42bc..b43e7d9c3c 100644
--- a/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
@@ -12,14 +12,16 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-instance-00000092/master-key.aes \
--machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 14336 \
--mem-prealloc \
+-object memory-backend-memfd,id=pc.ram,hugetlb=yes,hugetlbsize=2097152,\
+share=yes,prealloc=yes,size=15032385536 \
 -overcommit mem-lock=off \
 -smp 8,sockets=1,dies=1,cores=8,threads=1 \
 -object memory-backend-memfd,id=ram-node0,hugetlb=yes,hugetlbsize=2097152,\
-share=yes,size=15032385536,host-nodes=3,policy=preferred \
+share=yes,prealloc=yes,size=15032385536,host-nodes=3,policy=preferred \
 -numa node,nodeid=0,cpus=0-7,memdev=ram-node0 \
 -uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \
 -display none \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
index 8d3fa2e867..c5c5befdd5 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=219136k,slots=16,maxmem=1099511627776k \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
index 4f22f78277..418bf1158d 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=219136k,slots=16,maxmem=1099511627776k \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
index 53dda234a2..66477a2b09 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=219136k,slots=16,maxmem=1099511627776k \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
index cac02a6f6d..759d749c2e 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=219136k,slots=16,maxmem=1099511627776k \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
index 5e44496e39..b195b8625c 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=219136k,slots=16,maxmem=1099511627776k \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
index 94f8444d95..ae416d7c7f 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m size=1048576k,slots=16,maxmem=1099511627776k \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,dies=1,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=1073741824 \
diff --git a/tests/qemuxml2argvdata/mlock-off.x86_64-latest.args b/tests/qemuxml2argvdata/mlock-off.x86_64-latest.args
index 967fe4c826..2772c82ff6 100644
--- a/tests/qemuxml2argvdata/mlock-off.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/mlock-off.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/mlock-on.x86_64-latest.args b/tests/qemuxml2argvdata/mlock-on.x86_64-latest.args
index 167214fd64..f77d866055 100644
--- a/tests/qemuxml2argvdata/mlock-on.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/mlock-on.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=on \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/net-vhostuser.x86_64-latest.args b/tests/qemuxml2argvdata/net-vhostuser.x86_64-latest.args
index 27fa24a64f..d889d34168 100644
--- a/tests/qemuxml2argvdata/net-vhostuser.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/net-vhostuser.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args b/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
index c52015caa8..be4a9ed871 100644
--- a/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,hmat=on \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,hmat=on,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 12288 \
+-object memory-backend-ram,id=pc.ram,size=12884901888 \
 -overcommit mem-lock=off \
 -smp 12,sockets=12,cores=1,threads=1 \
 -object memory-backend-ram,id=ram-node0,size=2147483648 \
diff --git a/tests/qemuxml2argvdata/os-firmware-bios.x86_64-latest.args b/tests/qemuxml2argvdata/os-firmware-bios.x86_64-latest.args
index 4391c6eda2..ab94f309df 100644
--- a/tests/qemuxml2argvdata/os-firmware-bios.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/os-firmware-bios.x86_64-latest.args
@@ -12,10 +12,12 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-fedora/master-key.aes \
--machine pc-q35-4.0,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc-q35-4.0,accel=kvm,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -bios /usr/share/seabios/bios-256k.bin \
 -m 8 \
+-object memory-backend-ram,id=pc.ram,size=8388608 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
diff --git a/tests/qemuxml2argvdata/os-firmware-efi-secboot.x86_64-latest.args b/tests/qemuxml2argvdata/os-firmware-efi-secboot.x86_64-latest.args
index f8af2100ea..1eb5aad17b 100644
--- a/tests/qemuxml2argvdata/os-firmware-efi-secboot.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/os-firmware-efi-secboot.x86_64-latest.args
@@ -24,10 +24,12 @@ file=/tmp/lib/domain--1-fedora/master-key.aes \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,\
 "driver":"raw","file":"libvirt-pflash1-storage"}' \
 -machine pc-q35-4.0,accel=kvm,usb=off,smm=on,dump-guest-core=off,\
-pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format \
+pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -global driver=cfi.pflash01,property=secure,value=on \
 -m 8 \
+-object memory-backend-ram,id=pc.ram,size=8388608 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
diff --git a/tests/qemuxml2argvdata/os-firmware-efi.x86_64-latest.args b/tests/qemuxml2argvdata/os-firmware-efi.x86_64-latest.args
index a06213eb19..9b8cbc45b9 100644
--- a/tests/qemuxml2argvdata/os-firmware-efi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/os-firmware-efi.x86_64-latest.args
@@ -24,9 +24,11 @@ file=/tmp/lib/domain--1-fedora/master-key.aes \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,\
 "driver":"raw","file":"libvirt-pflash1-storage"}' \
 -machine pc-q35-4.0,accel=kvm,usb=off,smm=on,dump-guest-core=off,\
-pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format \
+pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 8 \
+-object memory-backend-ram,id=pc.ram,size=8388608 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
diff --git a/tests/qemuxml2argvdata/parallel-unix-chardev.x86_64-latest.args b/tests/qemuxml2argvdata/parallel-unix-chardev.x86_64-latest.args
index b3383da9a7..ea333ef5f8 100644
--- a/tests/qemuxml2argvdata/parallel-unix-chardev.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/parallel-unix-chardev.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/pcie-root-port-nohotplug.x86_64-latest.args b/tests/qemuxml2argvdata/pcie-root-port-nohotplug.x86_64-latest.args
index 0f81b31ad9..619b03a3eb 100644
--- a/tests/qemuxml2argvdata/pcie-root-port-nohotplug.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/pcie-root-port-nohotplug.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-ram,id=pc.ram,size=2147483648 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,cores=1,threads=1 \
 -uuid 11dbdcdd-4c3b-482b-8903-9bdb8c0a2774 \
diff --git a/tests/qemuxml2argvdata/pv-spinlock-disabled.x86_64-latest.args b/tests/qemuxml2argvdata/pv-spinlock-disabled.x86_64-latest.args
index eb449837bf..30f45b8a04 100644
--- a/tests/qemuxml2argvdata/pv-spinlock-disabled.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/pv-spinlock-disabled.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,kvm-pv-unhalt=off \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/pv-spinlock-enabled.x86_64-latest.args b/tests/qemuxml2argvdata/pv-spinlock-enabled.x86_64-latest.args
index af14fa05a9..beb0e5f2ef 100644
--- a/tests/qemuxml2argvdata/pv-spinlock-enabled.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/pv-spinlock-enabled.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64,kvm-pv-unhalt=on \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args b/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
index 7864f90402..aefe486298 100644
--- a/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
@@ -14,9 +14,10 @@ BAR='' \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args b/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args
index 05d42adda1..07b7aba42f 100644
--- a/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/smartcard-passthrough-unix.x86_64-latest.args b/tests/qemuxml2argvdata/smartcard-passthrough-unix.x86_64-latest.args
index 4f1e3242ed..3e0262e49c 100644
--- a/tests/qemuxml2argvdata/smartcard-passthrough-unix.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/smartcard-passthrough-unix.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args b/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args
index 2455e14cfe..90505c7a76 100644
--- a/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -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 \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-ram,id=pc.ram,size=2147483648 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 11d7cd22-da89-3094-6212-079a48a309a1 \
diff --git a/tests/qemuxml2argvdata/tpm-emulator-tpm2.x86_64-latest.args b/tests/qemuxml2argvdata/tpm-emulator-tpm2.x86_64-latest.args
index 2455e14cfe..90505c7a76 100644
--- a/tests/qemuxml2argvdata/tpm-emulator-tpm2.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/tpm-emulator-tpm2.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -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 \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-ram,id=pc.ram,size=2147483648 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 11d7cd22-da89-3094-6212-079a48a309a1 \
diff --git a/tests/qemuxml2argvdata/tpm-emulator.x86_64-latest.args b/tests/qemuxml2argvdata/tpm-emulator.x86_64-latest.args
index 2455e14cfe..90505c7a76 100644
--- a/tests/qemuxml2argvdata/tpm-emulator.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/tpm-emulator.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -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 \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-ram,id=pc.ram,size=2147483648 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 11d7cd22-da89-3094-6212-079a48a309a1 \
diff --git a/tests/qemuxml2argvdata/tpm-passthrough-crb.x86_64-latest.args b/tests/qemuxml2argvdata/tpm-passthrough-crb.x86_64-latest.args
index 5508e4defb..911d0c660c 100644
--- a/tests/qemuxml2argvdata/tpm-passthrough-crb.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/tpm-passthrough-crb.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -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 \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-ram,id=pc.ram,size=2147483648 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 11d7cd22-da89-3094-6212-079a48a309a1 \
diff --git a/tests/qemuxml2argvdata/tpm-passthrough.x86_64-latest.args b/tests/qemuxml2argvdata/tpm-passthrough.x86_64-latest.args
index 60edf86dbd..5da7d13a3d 100644
--- a/tests/qemuxml2argvdata/tpm-passthrough.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/tpm-passthrough.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -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 \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-ram,id=pc.ram,size=2147483648 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid 11d7cd22-da89-3094-6212-079a48a309a1 \
diff --git a/tests/qemuxml2argvdata/tseg-explicit-size.x86_64-latest.args b/tests/qemuxml2argvdata/tseg-explicit-size.x86_64-latest.args
index 53dab283cc..2e931dfe9a 100644
--- a/tests/qemuxml2argvdata/tseg-explicit-size.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/tseg-explicit-size.x86_64-latest.args
@@ -12,10 +12,12 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc-q35-2.10,accel=tcg,usb=off,smm=on,dump-guest-core=off \
+-machine pc-q35-2.10,accel=tcg,usb=off,smm=on,dump-guest-core=off,\
+memory-backend=pc.ram \
 -global mch.extended-tseg-mbytes=48 \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/usb-redir-unix.x86_64-latest.args b/tests/qemuxml2argvdata/usb-redir-unix.x86_64-latest.args
index d6abba6817..1d247b0337 100644
--- a/tests/qemuxml2argvdata/usb-redir-unix.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/usb-redir-unix.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
index dd5f68abc5..13359c91fe 100644
--- a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 14336 \
+-object memory-backend-file,id=pc.ram,\
+mem-path=/var/lib/libvirt/qemu/ram/-1-guest/pc.ram,share=yes,size=15032385536 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,cores=1,threads=1 \
 -object memory-backend-file,id=ram-node0,\
diff --git a/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
index e4f5db7a63..59f45d466b 100644
--- a/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
@@ -12,9 +12,12 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 2048 \
+-object memory-backend-file,id=pc.ram,\
+mem-path=/dev/hugepages2M/libvirt/qemu/-1-guest,share=yes,prealloc=yes,\
+size=2147483648 \
 -overcommit mem-lock=off \
 -smp 2,sockets=2,cores=1,threads=1 \
 -object memory-backend-file,id=ram-node0,\
diff --git a/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
index e99a5342dc..e7d3315b8f 100644
--- a/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-memfd,id=pc.ram,share=yes,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -object memory-backend-memfd,id=ram-node0,share=yes,size=224395264 \
diff --git a/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
index 277bf8c646..df5b1b481d 100644
--- a/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-memfd,id=pc.ram,share=yes,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -object memory-backend-memfd,id=ram-node0,share=yes,size=224395264 \
diff --git a/tests/qemuxml2argvdata/vhost-vsock-auto.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-vsock-auto.x86_64-latest.args
index e083b872c5..bc9102eab3 100644
--- a/tests/qemuxml2argvdata/vhost-vsock-auto.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-vsock-auto.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc-i440fx-2.9,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-i440fx-2.9,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid bba65c0e-c049-934f-b6aa-4e2c0582acdf \
diff --git a/tests/qemuxml2argvdata/vhost-vsock.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-vsock.x86_64-latest.args
index 8b3538a56a..a461d4d242 100644
--- a/tests/qemuxml2argvdata/vhost-vsock.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-vsock.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-test/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid bba65c0e-c049-934f-b6aa-4e2c0582acdf \
diff --git a/tests/qemuxml2argvdata/video-bochs-display-device.x86_64-latest.args b/tests/qemuxml2argvdata/video-bochs-display-device.x86_64-latest.args
index b7fef1fe08..094c96aad6 100644
--- a/tests/qemuxml2argvdata/video-bochs-display-device.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/video-bochs-display-device.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/video-qxl-device-vram64.x86_64-latest.args b/tests/qemuxml2argvdata/video-qxl-device-vram64.x86_64-latest.args
index f12cef8549..6f38fae69c 100644
--- a/tests/qemuxml2argvdata/video-qxl-device-vram64.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/video-qxl-device-vram64.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/video-qxl-sec-device-vram64.x86_64-latest.args b/tests/qemuxml2argvdata/video-qxl-sec-device-vram64.x86_64-latest.args
index d651b69902..e79c21eaf0 100644
--- a/tests/qemuxml2argvdata/video-qxl-sec-device-vram64.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/video-qxl-sec-device-vram64.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/video-ramfb-display-device.x86_64-latest.args b/tests/qemuxml2argvdata/video-ramfb-display-device.x86_64-latest.args
index 6fe792f46d..5e4d4db341 100644
--- a/tests/qemuxml2argvdata/video-ramfb-display-device.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/video-ramfb-display-device.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 1024 \
+-object memory-backend-ram,id=pc.ram,size=1073741824 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-9p-multidevs.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-9p-multidevs.x86_64-latest.args
index 5a2e1fafe1..4e453a2b05 100644
--- a/tests/qemuxml2argvdata/virtio-9p-multidevs.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-9p-multidevs.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-non-transitional.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-non-transitional.x86_64-latest.args
index 1fe7901479..8674a4b99d 100644
--- a/tests/qemuxml2argvdata/virtio-non-transitional.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-non-transitional.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-controller-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-controller-ats.x86_64-latest.args
index 734e239617..6552ee68f0 100644
--- a/tests/qemuxml2argvdata/virtio-options-controller-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-controller-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-controller-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-controller-iommu.x86_64-latest.args
index 3403a515ca..15eb4b5c49 100644
--- a/tests/qemuxml2argvdata/virtio-options-controller-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-controller-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-controller-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-controller-packed.x86_64-latest.args
index 6d0e9f3167..ae605a6ef0 100644
--- a/tests/qemuxml2argvdata/virtio-options-controller-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-controller-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-disk-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-disk-ats.x86_64-latest.args
index cf82457eb6..908b5724d4 100644
--- a/tests/qemuxml2argvdata/virtio-options-disk-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-disk-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-disk-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-disk-iommu.x86_64-latest.args
index 70a5ee13a1..3a030d8efb 100644
--- a/tests/qemuxml2argvdata/virtio-options-disk-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-disk-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-disk-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-disk-packed.x86_64-latest.args
index 09ac4d559b..0cc82a2e46 100644
--- a/tests/qemuxml2argvdata/virtio-options-disk-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-disk-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-fs-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-fs-ats.x86_64-latest.args
index 6fb1e9f7e2..92b8e248eb 100644
--- a/tests/qemuxml2argvdata/virtio-options-fs-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-fs-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-fs-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-fs-iommu.x86_64-latest.args
index 46d9eb4fca..62c2d347f3 100644
--- a/tests/qemuxml2argvdata/virtio-options-fs-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-fs-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-fs-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-fs-packed.x86_64-latest.args
index 6856f3899d..79aa5ca1a0 100644
--- a/tests/qemuxml2argvdata/virtio-options-fs-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-fs-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-input-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-input-ats.x86_64-latest.args
index fe753ac550..27375c96ba 100644
--- a/tests/qemuxml2argvdata/virtio-options-input-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-input-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-input-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-input-iommu.x86_64-latest.args
index 66ed22e1cd..b38a8f3f9b 100644
--- a/tests/qemuxml2argvdata/virtio-options-input-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-input-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-input-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-input-packed.x86_64-latest.args
index 866a461794..38a402ef5a 100644
--- a/tests/qemuxml2argvdata/virtio-options-input-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-input-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-memballoon-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-memballoon-ats.x86_64-latest.args
index f5ddb86840..9b4ef3711c 100644
--- a/tests/qemuxml2argvdata/virtio-options-memballoon-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-memballoon-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-memballoon-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-memballoon-iommu.x86_64-latest.args
index 6a62e28dc9..ead878573d 100644
--- a/tests/qemuxml2argvdata/virtio-options-memballoon-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-memballoon-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-memballoon-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-memballoon-packed.x86_64-latest.args
index 7b6c5f3694..3c32335896 100644
--- a/tests/qemuxml2argvdata/virtio-options-memballoon-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-memballoon-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-net-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-net-ats.x86_64-latest.args
index 065033e3b3..12c0764d56 100644
--- a/tests/qemuxml2argvdata/virtio-options-net-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-net-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-net-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-net-iommu.x86_64-latest.args
index fd97172249..f2d626a35f 100644
--- a/tests/qemuxml2argvdata/virtio-options-net-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-net-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-net-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-net-packed.x86_64-latest.args
index f60ebdd50c..e6453534d4 100644
--- a/tests/qemuxml2argvdata/virtio-options-net-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-net-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-rng-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-rng-ats.x86_64-latest.args
index aa7b46831b..cd4807b6c4 100644
--- a/tests/qemuxml2argvdata/virtio-options-rng-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-rng-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-rng-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-rng-iommu.x86_64-latest.args
index 7e0dbf151d..66fb11bf7a 100644
--- a/tests/qemuxml2argvdata/virtio-options-rng-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-rng-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-rng-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-rng-packed.x86_64-latest.args
index 0958aaeae4..3feff0eb58 100644
--- a/tests/qemuxml2argvdata/virtio-options-rng-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-rng-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-video-ats.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-video-ats.x86_64-latest.args
index 9b85c9cb20..3ec61dab11 100644
--- a/tests/qemuxml2argvdata/virtio-options-video-ats.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-video-ats.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-video-iommu.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-video-iommu.x86_64-latest.args
index d8a664d8d9..cfd3024e02 100644
--- a/tests/qemuxml2argvdata/virtio-options-video-iommu.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-video-iommu.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options-video-packed.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options-video-packed.x86_64-latest.args
index 4e82d1880f..c5719bb1e6 100644
--- a/tests/qemuxml2argvdata/virtio-options-video-packed.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options-video-packed.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-options.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-options.x86_64-latest.args
index 66bbd7df64..e230e926a4 100644
--- a/tests/qemuxml2argvdata/virtio-options.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-options.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-rng-builtin.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-rng-builtin.x86_64-latest.args
index fe01d661e0..f8e37ce7f8 100644
--- a/tests/qemuxml2argvdata/virtio-rng-builtin.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-rng-builtin.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-rng-egd-unix.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-rng-egd-unix.x86_64-latest.args
index 37fb988b75..192d84413f 100644
--- a/tests/qemuxml2argvdata/virtio-rng-egd-unix.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-rng-egd-unix.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/virtio-transitional.x86_64-latest.args b/tests/qemuxml2argvdata/virtio-transitional.x86_64-latest.args
index 01cb9f8308..c526d7aec5 100644
--- a/tests/qemuxml2argvdata/virtio-transitional.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/virtio-transitional.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 214 \
+-object memory-backend-ram,id=pc.ram,size=224395264 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-pc-4.2.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-pc-4.2.x86_64-latest.args
index 3d9f246000..ad770d204f 100644
--- a/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-pc-4.2.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-pc-4.2.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc-i440fx-4.2,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc-i440fx-4.2,accel=kvm,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
diff --git a/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-q35-4.2.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-q35-4.2.x86_64-latest.args
index 1066522ed5..81df0cb959 100644
--- a/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-q35-4.2.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-default-cpu-kvm-q35-4.2.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc-q35-4.2,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc-q35-4.2,accel=kvm,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
diff --git a/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-pc-4.2.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-pc-4.2.x86_64-latest.args
index e547001eb5..ffc52d85b0 100644
--- a/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-pc-4.2.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-pc-4.2.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc-i440fx-4.2,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-i440fx-4.2,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
diff --git a/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-q35-4.2.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-q35-4.2.x86_64-latest.args
index 6549f6251e..eda728f1f8 100644
--- a/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-q35-4.2.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-default-cpu-tcg-q35-4.2.x86_64-latest.args
@@ -12,9 +12,11 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc-q35-4.2,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc-q35-4.2,accel=tcg,usb=off,dump-guest-core=off,\
+memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
diff --git a/tests/qemuxml2argvdata/x86_64-pc-graphics.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-pc-graphics.x86_64-latest.args
index 4049ee6b27..5458fc6e10 100644
--- a/tests/qemuxml2argvdata/x86_64-pc-graphics.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-pc-graphics.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 2c0abd3d-8f18-42c0-a132-9708213aaac9 \
diff --git a/tests/qemuxml2argvdata/x86_64-pc-headless.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-pc-headless.x86_64-latest.args
index 47887c0c18..d2246d0a02 100644
--- a/tests/qemuxml2argvdata/x86_64-pc-headless.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-pc-headless.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
diff --git a/tests/qemuxml2argvdata/x86_64-q35-graphics.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-q35-graphics.x86_64-latest.args
index 6425325a5b..e9d4e2c320 100644
--- a/tests/qemuxml2argvdata/x86_64-q35-graphics.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-q35-graphics.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 61288c03-0b0d-4f1e-9496-0f0256f2e013 \
diff --git a/tests/qemuxml2argvdata/x86_64-q35-headless.x86_64-latest.args b/tests/qemuxml2argvdata/x86_64-q35-headless.x86_64-latest.args
index 63254b500c..8bec37539f 100644
--- a/tests/qemuxml2argvdata/x86_64-q35-headless.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/x86_64-q35-headless.x86_64-latest.args
@@ -12,9 +12,10 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,\
 file=/tmp/lib/domain--1-guest/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -cpu qemu64 \
 -m 4096 \
+-object memory-backend-ram,id=pc.ram,size=4294967296 \
 -overcommit mem-lock=off \
 -smp 4,sockets=4,cores=1,threads=1 \
 -uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \