diff --git a/hw/Kconfig b/hw/Kconfig
index ba62ff6417..2ccb73add5 100644
--- a/hw/Kconfig
+++ b/hw/Kconfig
@@ -9,6 +9,7 @@ source core/Kconfig
 source cxl/Kconfig
 source display/Kconfig
 source dma/Kconfig
+source fsi/Kconfig
 source gpio/Kconfig
 source hyperv/Kconfig
 source i2c/Kconfig
diff --git a/hw/fsi/Kconfig b/hw/fsi/Kconfig
new file mode 100644
index 0000000000..687449e14e
--- /dev/null
+++ b/hw/fsi/Kconfig
@@ -0,0 +1,2 @@
+config LBUS
+    bool
diff --git a/hw/fsi/lbus.c b/hw/fsi/lbus.c
new file mode 100644
index 0000000000..afb26ef7ea
--- /dev/null
+++ b/hw/fsi/lbus.c
@@ -0,0 +1,94 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright (C) 2023 IBM Corp.
+ *
+ * IBM Local bus where FSI slaves are connected
+ */
+
+#include "qemu/osdep.h"
+
+#include "qapi/error.h"
+#include "qemu/log.h"
+
+#include "hw/fsi/lbus.h"
+
+#include "hw/qdev-properties.h"
+
+static void lbus_realize(BusState *bus, Error **errp)
+{
+    LBusNode *node;
+    LBus *lbus = LBUS(bus);
+
+    memory_region_init(&lbus->mr, OBJECT(lbus), TYPE_LBUS,
+                       (2 * 1024 * 1024) - 0x400);
+
+    QLIST_FOREACH(node, &lbus->devices, next) {
+        memory_region_add_subregion(&lbus->mr, node->ldev->address,
+                                    &node->ldev->iomem);
+    }
+}
+
+static void lbus_init(Object *o)
+{
+}
+
+static void lbus_class_init(ObjectClass *klass, void *data)
+{
+    BusClass *k = BUS_CLASS(klass);
+    k->realize = lbus_realize;
+}
+
+static const TypeInfo lbus_info = {
+    .name = TYPE_LBUS,
+    .parent = TYPE_BUS,
+    .instance_init = lbus_init,
+    .instance_size = sizeof(LBus),
+    .class_init = lbus_class_init,
+};
+
+static Property lbus_device_props[] = {
+    DEFINE_PROP_UINT32("address", LBusDevice, address, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+DeviceState *lbus_create_device(LBus *bus, const char *type, uint32_t addr)
+{
+    DeviceState *dev;
+    LBusNode *node;
+
+    dev = qdev_new(type);
+    qdev_prop_set_uint8(dev, "address", addr);
+    qdev_realize_and_unref(dev, &bus->bus, &error_fatal);
+
+    /* Move to post_load */
+    node = g_malloc(sizeof(struct LBusNode));
+    node->ldev = LBUS_DEVICE(dev);
+    QLIST_INSERT_HEAD(&bus->devices, node, next);
+
+    return dev;
+}
+
+static void lbus_device_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->bus_type = TYPE_LBUS;
+    device_class_set_props(dc, lbus_device_props);
+}
+
+static const TypeInfo lbus_device_type_info = {
+    .name = TYPE_LBUS_DEVICE,
+    .parent = TYPE_DEVICE,
+    .instance_size = sizeof(LBusDevice),
+    .abstract = true,
+    .class_init = lbus_device_class_init,
+    .class_size = sizeof(LBusDeviceClass),
+};
+
+static void lbus_register_types(void)
+{
+    type_register_static(&lbus_info);
+    type_register_static(&lbus_device_type_info);
+}
+
+type_init(lbus_register_types);
diff --git a/hw/fsi/meson.build b/hw/fsi/meson.build
new file mode 100644
index 0000000000..e1007d5fea
--- /dev/null
+++ b/hw/fsi/meson.build
@@ -0,0 +1 @@
+system_ss.add(when: 'CONFIG_LBUS', if_true: files('lbus.c'))
diff --git a/hw/meson.build b/hw/meson.build
index c7ac7d3d75..6c71ee9cfa 100644
--- a/hw/meson.build
+++ b/hw/meson.build
@@ -43,6 +43,7 @@ subdir('virtio')
 subdir('watchdog')
 subdir('xen')
 subdir('xenpv')
+subdir('fsi')
 
 subdir('alpha')
 subdir('arm')
diff --git a/include/hw/fsi/lbus.h b/include/hw/fsi/lbus.h
new file mode 100644
index 0000000000..fafc065178
--- /dev/null
+++ b/include/hw/fsi/lbus.h
@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright (C) 2023 IBM Corp.
+ *
+ * IBM Local bus and connected device structures.
+ */
+#ifndef FSI_LBUS_H
+#define FSI_LBUS_H
+
+#include "exec/memory.h"
+#include "hw/qdev-core.h"
+
+#define TYPE_LBUS_DEVICE "lbus.device"
+OBJECT_DECLARE_TYPE(LBusDevice, LBusDeviceClass, LBUS_DEVICE)
+
+typedef struct LBusDevice {
+    DeviceState parent;
+
+    MemoryRegion iomem;
+    uint32_t address;
+} LBusDevice;
+
+typedef struct LBusDeviceClass {
+    DeviceClass parent;
+
+    uint32_t config;
+} LBusDeviceClass;
+
+typedef struct LBusNode {
+    LBusDevice *ldev;
+
+    QLIST_ENTRY(LBusNode) next;
+} LBusNode;
+
+#define TYPE_LBUS "lbus"
+OBJECT_DECLARE_SIMPLE_TYPE(LBus, LBUS)
+
+typedef struct LBus {
+    BusState bus;
+
+    MemoryRegion mr;
+
+    QLIST_HEAD(, LBusNode) devices;
+} LBus;
+
+DeviceState *lbus_create_device(LBus *bus, const char *type, uint32_t addr);
+int lbus_add_device(LBus *bus, LBusDevice *dev);
+#endif /* FSI_LBUS_H */
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index cb3526d1f4..e12496f619 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -618,4 +618,10 @@ static inline uint64_t half_unshuffle64(uint64_t x)
     return x;
 }
 
+/* Bitwise operations at the word level. */
+#define BE_BIT(x)                          BIT(31 - (x))
+#define GENMASK(t, b) \
+    (((1ULL << ((t) + 1)) - 1) & ~((1ULL << (b)) - 1))
+#define BE_GENMASK(t, b)                   GENMASK(BE_BIT(t), BE_BIT(b))
+
 #endif
