diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 8d764f965cd3..e6135c34d656 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -35,6 +35,7 @@ struct PCMachineState {
     PFlashCFI01 *flash[2];
 
     /* Configuration options: */
+    uint64_t max_ram_below_4g;
     OnOffAuto vmport;
 
     bool acpi_build_enabled;
@@ -51,6 +52,7 @@ struct PCMachineState {
 };
 
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
+#define PC_MACHINE_MAX_RAM_BELOW_4G "max-ram-below-4g"
 #define PC_MACHINE_DEVMEM_REGION_SIZE "device-memory-region-size"
 #define PC_MACHINE_VMPORT           "vmport"
 #define PC_MACHINE_SMBUS            "smbus"
diff --git a/include/hw/i386/x86.h b/include/hw/i386/x86.h
index b52285481687..b79f24e28545 100644
--- a/include/hw/i386/x86.h
+++ b/include/hw/i386/x86.h
@@ -51,9 +51,6 @@ typedef struct {
     qemu_irq *gsi;
     GMappedFile *initrd_mapped_file;
 
-    /* Configuration options: */
-    uint64_t max_ram_below_4g;
-
     /* RAM information (sizes, addresses, configuration): */
     ram_addr_t below_4g_mem_size, above_4g_mem_size;
 
@@ -82,7 +79,6 @@ typedef struct {
     AddressSpace *ioapic_as;
 } X86MachineState;
 
-#define X86_MACHINE_MAX_RAM_BELOW_4G "max-ram-below-4g"
 #define X86_MACHINE_SMM              "smm"
 #define X86_MACHINE_ACPI             "acpi"
 
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 2128f3d6fe8b..80a6cac3b56f 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1856,6 +1856,45 @@ static void pc_machine_set_pit(Object *obj, bool value, Error **errp)
     pcms->pit_enabled = value;
 }
 
+static void pc_machine_get_max_ram_below_4g(Object *obj, Visitor *v,
+                                            const char *name, void *opaque,
+                                            Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(obj);
+    uint64_t value = pcms->max_ram_below_4g;
+
+    visit_type_size(v, name, &value, errp);
+}
+
+static void pc_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
+                                            const char *name, void *opaque,
+                                            Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(obj);
+    Error *error = NULL;
+    uint64_t value;
+
+    visit_type_size(v, name, &value, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+    if (value > 4 * GiB) {
+        error_setg(&error,
+                   "Machine option 'max-ram-below-4g=%"PRIu64
+                   "' expects size less than or equal to 4G", value);
+        error_propagate(errp, error);
+        return;
+    }
+
+    if (value < 1 * MiB) {
+        warn_report("Only %" PRIu64 " bytes of RAM below the 4GiB boundary,"
+                    "BIOS may not work with less than 1MiB", value);
+    }
+
+    pcms->max_ram_below_4g = value;
+}
+
 static void pc_machine_initfn(Object *obj)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
@@ -1865,6 +1904,7 @@ static void pc_machine_initfn(Object *obj)
 #else
     pcms->vmport = ON_OFF_AUTO_OFF;
 #endif /* CONFIG_VMPORT */
+    pcms->max_ram_below_4g = 0; /* use default */
     /* acpi build is enabled by default if machine supports it */
     pcms->acpi_build_enabled = PC_MACHINE_GET_CLASS(pcms)->has_acpi_build;
     pcms->smbus_enabled = true;
@@ -1963,6 +2003,12 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     mc->numa_mem_supported = true;
     mc->default_ram_id = "pc.ram";
 
+    object_class_property_add(oc, PC_MACHINE_MAX_RAM_BELOW_4G, "size",
+        pc_machine_get_max_ram_below_4g, pc_machine_set_max_ram_below_4g,
+        NULL, NULL);
+    object_class_property_set_description(oc, PC_MACHINE_MAX_RAM_BELOW_4G,
+        "Maximum ram below the 4G boundary (32bit boundary)");
+
     object_class_property_add(oc, PC_MACHINE_DEVMEM_REGION_SIZE, "int",
         pc_machine_get_device_memory_region_size, NULL,
         NULL, NULL);
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index f66e1d73ce0b..503c35f7bf4c 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -127,11 +127,11 @@ static void pc_init1(MachineState *machine,
     if (xen_enabled()) {
         xen_hvm_init(pcms, &ram_memory);
     } else {
-        if (!x86ms->max_ram_below_4g) {
-            x86ms->max_ram_below_4g = 0xe0000000; /* default: 3.5G */
+        if (!pcms->max_ram_below_4g) {
+            pcms->max_ram_below_4g = 0xe0000000; /* default: 3.5G */
         }
-        lowmem = x86ms->max_ram_below_4g;
-        if (machine->ram_size >= x86ms->max_ram_below_4g) {
+        lowmem = pcms->max_ram_below_4g;
+        if (machine->ram_size >= pcms->max_ram_below_4g) {
             if (pcmc->gigabyte_align) {
                 if (lowmem > 0xc0000000) {
                     lowmem = 0xc0000000;
@@ -140,7 +140,7 @@ static void pc_init1(MachineState *machine,
                     warn_report("Large machine and max_ram_below_4g "
                                 "(%" PRIu64 ") not a multiple of 1G; "
                                 "possible bad performance.",
-                                x86ms->max_ram_below_4g);
+                                pcms->max_ram_below_4g);
                 }
             }
         }
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 4ba8ac8774e4..90e8fb2cb737 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -154,18 +154,18 @@ static void pc_q35_init(MachineState *machine)
     /* Handle the machine opt max-ram-below-4g.  It is basically doing
      * min(qemu limit, user limit).
      */
-    if (!x86ms->max_ram_below_4g) {
-        x86ms->max_ram_below_4g = 4 * GiB;
+    if (!pcms->max_ram_below_4g) {
+        pcms->max_ram_below_4g = 4 * GiB;
     }
-    if (lowmem > x86ms->max_ram_below_4g) {
-        lowmem = x86ms->max_ram_below_4g;
+    if (lowmem > pcms->max_ram_below_4g) {
+        lowmem = pcms->max_ram_below_4g;
         if (machine->ram_size - lowmem > lowmem &&
             lowmem & (1 * GiB - 1)) {
             warn_report("There is possibly poor performance as the ram size "
                         " (0x%" PRIx64 ") is more then twice the size of"
                         " max-ram-below-4g (%"PRIu64") and"
                         " max-ram-below-4g is not a multiple of 1G.",
-                        (uint64_t)machine->ram_size, x86ms->max_ram_below_4g);
+                        (uint64_t)machine->ram_size, pcms->max_ram_below_4g);
         }
     }
 
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 7a3bc7ab6639..49884e5c1597 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -846,45 +846,6 @@ void x86_bios_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw)
                                 bios);
 }
 
-static void x86_machine_get_max_ram_below_4g(Object *obj, Visitor *v,
-                                             const char *name, void *opaque,
-                                             Error **errp)
-{
-    X86MachineState *x86ms = X86_MACHINE(obj);
-    uint64_t value = x86ms->max_ram_below_4g;
-
-    visit_type_size(v, name, &value, errp);
-}
-
-static void x86_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
-                                             const char *name, void *opaque,
-                                             Error **errp)
-{
-    X86MachineState *x86ms = X86_MACHINE(obj);
-    Error *error = NULL;
-    uint64_t value;
-
-    visit_type_size(v, name, &value, &error);
-    if (error) {
-        error_propagate(errp, error);
-        return;
-    }
-    if (value > 4 * GiB) {
-        error_setg(&error,
-                   "Machine option 'max-ram-below-4g=%"PRIu64
-                   "' expects size less than or equal to 4G", value);
-        error_propagate(errp, error);
-        return;
-    }
-
-    if (value < 1 * MiB) {
-        warn_report("Only %" PRIu64 " bytes of RAM below the 4GiB boundary,"
-                    "BIOS may not work with less than 1MiB", value);
-    }
-
-    x86ms->max_ram_below_4g = value;
-}
-
 bool x86_machine_is_smm_enabled(X86MachineState *x86ms)
 {
     bool smm_available = false;
@@ -958,7 +919,6 @@ static void x86_machine_initfn(Object *obj)
 
     x86ms->smm = ON_OFF_AUTO_AUTO;
     x86ms->acpi = ON_OFF_AUTO_AUTO;
-    x86ms->max_ram_below_4g = 0; /* use default */
     x86ms->smp_dies = 1;
 
     x86ms->apicid_from_cpu_idx = x86_apicid_from_cpu_idx;
@@ -980,12 +940,6 @@ static void x86_machine_class_init(ObjectClass *oc, void *data)
     x86mc->save_tsc_khz = true;
     nc->nmi_monitor_handler = x86_nmi;
 
-    object_class_property_add(oc, X86_MACHINE_MAX_RAM_BELOW_4G, "size",
-        x86_machine_get_max_ram_below_4g, x86_machine_set_max_ram_below_4g,
-        NULL, NULL);
-    object_class_property_set_description(oc, X86_MACHINE_MAX_RAM_BELOW_4G,
-        "Maximum ram below the 4G boundary (32bit boundary)");
-
     object_class_property_add(oc, X86_MACHINE_SMM, "OnOffAuto",
         x86_machine_get_smm, x86_machine_set_smm,
         NULL, NULL);
