s390: Move hw files to hw/s390x

This moves all files only used by s390 system emulation to hw/s390x.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>

6 files changed, 1065 insertions, 3 deletions

diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index f6b461b..e4ee456 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -1,6 +1,4 @@
 obj-y = s390-virtio-bus.o s390-virtio.o
-
-obj-y := $(addprefix ../,$(obj-y))
 obj-y += s390-virtio-hcall.o
 obj-y += sclp.o
 obj-y += event-facility.o
diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c
new file mode 100644
index 0000000..32f63b0
--- /dev/null
+++ b/hw/s390x/s390-virtio-bus.c
@@ -0,0 +1,623 @@
+/*
+ * QEMU S390 virtio target
+ *
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "block/block.h"
+#include "sysemu/sysemu.h"
+#include "hw/boards.h"
+#include "monitor/monitor.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "hw/virtio.h"
+#include "hw/virtio-rng.h"
+#include "hw/virtio-serial.h"
+#include "hw/virtio-net.h"
+#include "hw/sysbus.h"
+#include "sysemu/kvm.h"
+
+#include "hw/s390x/s390-virtio-bus.h"
+#include "hw/virtio-bus.h"
+
+/* #define DEBUG_S390 */
+
+#ifdef DEBUG_S390
+#define dprintf(fmt, ...) \
+    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+    do { } while (0)
+#endif
+
+#define VIRTIO_EXT_CODE   0x2603
+
+static const TypeInfo s390_virtio_bus_info = {
+    .name = TYPE_S390_VIRTIO_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = sizeof(VirtIOS390Bus),
+};
+
+static const VirtIOBindings virtio_s390_bindings;
+
+static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
+
+/* length of VirtIO device pages */
+const hwaddr virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
+
+static void s390_virtio_bus_reset(void *opaque)
+{
+    VirtIOS390Bus *bus = opaque;
+    bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
+}
+
+void s390_virtio_reset_idx(VirtIOS390Device *dev)
+{
+    int i;
+    hwaddr idx_addr;
+    uint8_t num_vq;
+
+    num_vq = s390_virtio_device_num_vq(dev);
+    for (i = 0; i < num_vq; i++) {
+        idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
+            VIRTIO_VRING_AVAIL_IDX_OFFS;
+        stw_phys(idx_addr, 0);
+        idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
+            VIRTIO_VRING_USED_IDX_OFFS;
+        stw_phys(idx_addr, 0);
+    }
+}
+
+VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size)
+{
+    VirtIOS390Bus *bus;
+    BusState *_bus;
+    DeviceState *dev;
+
+    /* Create bridge device */
+    dev = qdev_create(NULL, "s390-virtio-bridge");
+    qdev_init_nofail(dev);
+
+    /* Create bus on bridge device */
+
+    _bus = qbus_create(TYPE_S390_VIRTIO_BUS, dev, "s390-virtio");
+    bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);
+
+    bus->dev_page = *ram_size;
+    bus->dev_offs = bus->dev_page;
+    bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
+
+    /* Enable hotplugging */
+    _bus->allow_hotplug = 1;
+
+    /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
+    *ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
+
+    qemu_register_reset(s390_virtio_bus_reset, bus);
+    return bus;
+}
+
+static void s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
+{
+    CPUS390XState *env = &cpu->env;
+
+    if (kvm_enabled()) {
+        kvm_s390_virtio_irq(cpu, config_change, token);
+    } else {
+        cpu_inject_ext(env, VIRTIO_EXT_CODE, config_change, token);
+    }
+}
+
+static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev)
+{
+    VirtIOS390Bus *bus;
+    int dev_len;
+
+    bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+    dev->vdev = vdev;
+    dev->dev_offs = bus->dev_offs;
+    dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */
+
+    dev_len = VIRTIO_DEV_OFFS_CONFIG;
+    dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
+    dev_len += dev->feat_len * 2;
+    dev_len += vdev->config_len;
+
+    bus->dev_offs += dev_len;
+
+    virtio_bind_device(vdev, &virtio_s390_bindings, DEVICE(dev));
+    dev->host_features = vdev->get_features(vdev, dev->host_features);
+    s390_virtio_device_sync(dev);
+    s390_virtio_reset_idx(dev);
+    if (dev->qdev.hotplugged) {
+        S390CPU *cpu = s390_cpu_addr2state(0);
+        s390_virtio_irq(cpu, VIRTIO_PARAM_DEV_ADD, dev->dev_offs);
+    }
+
+    return 0;
+}
+
+static int s390_virtio_net_init(VirtIOS390Device *dev)
+{
+    VirtIODevice *vdev;
+
+    vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net);
+    if (!vdev) {
+        return -1;
+    }
+
+    return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_blk_init(VirtIOS390Device *dev)
+{
+    VirtIODevice *vdev;
+
+    vdev = virtio_blk_init((DeviceState *)dev, &dev->blk);
+    if (!vdev) {
+        return -1;
+    }
+
+    return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_serial_init(VirtIOS390Device *dev)
+{
+    VirtIOS390Bus *bus;
+    VirtIODevice *vdev;
+    int r;
+
+    bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+
+    vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
+    if (!vdev) {
+        return -1;
+    }
+
+    r = s390_virtio_device_init(dev, vdev);
+    if (!r) {
+        bus->console = dev;
+    }
+
+    return r;
+}
+
+static int s390_virtio_scsi_init(VirtIOS390Device *dev)
+{
+    VirtIODevice *vdev;
+
+    vdev = virtio_scsi_init((DeviceState *)dev, &dev->scsi);
+    if (!vdev) {
+        return -1;
+    }
+
+    return s390_virtio_device_init(dev, vdev);
+}
+
+static int s390_virtio_rng_init(VirtIOS390Device *dev)
+{
+    VirtIODevice *vdev;
+
+    vdev = virtio_rng_init((DeviceState *)dev, &dev->rng);
+    if (!vdev) {
+        return -1;
+    }
+
+    return s390_virtio_device_init(dev, vdev);
+}
+
+static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
+{
+    ram_addr_t token_off;
+
+    token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
+                (vq * VIRTIO_VQCONFIG_LEN) +
+                VIRTIO_VQCONFIG_OFFS_TOKEN;
+
+    return ldq_be_phys(token_off);
+}
+
+static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
+{
+    VirtIODevice *vdev = dev->vdev;
+    int num_vq;
+
+    for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
+        if (!virtio_queue_get_num(vdev, num_vq)) {
+            break;
+        }
+    }
+
+    return num_vq;
+}
+
+static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
+{
+    ram_addr_t r = bus->next_ring;
+
+    bus->next_ring += VIRTIO_RING_LEN;
+    return r;
+}
+
+void s390_virtio_device_sync(VirtIOS390Device *dev)
+{
+    VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
+    ram_addr_t cur_offs;
+    uint8_t num_vq;
+    int i;
+
+    virtio_reset(dev->vdev);
+
+    /* Sync dev space */
+    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);
+
+    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
+    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);
+
+    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);
+
+    num_vq = s390_virtio_device_num_vq(dev);
+    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);
+
+    /* Sync virtqueues */
+    for (i = 0; i < num_vq; i++) {
+        ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
+                        (i * VIRTIO_VQCONFIG_LEN);
+        ram_addr_t vring;
+
+        vring = s390_virtio_next_ring(bus);
+        virtio_queue_set_addr(dev->vdev, i, vring);
+        virtio_queue_set_vector(dev->vdev, i, i);
+        stq_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
+        stw_be_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
+    }
+
+    cur_offs = dev->dev_offs;
+    cur_offs += VIRTIO_DEV_OFFS_CONFIG;
+    cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
+
+    /* Sync feature bitmap */
+    stl_le_phys(cur_offs, dev->host_features);
+
+    dev->feat_offs = cur_offs + dev->feat_len;
+    cur_offs += dev->feat_len * 2;
+
+    /* Sync config space */
+    if (dev->vdev->get_config) {
+        dev->vdev->get_config(dev->vdev, dev->vdev->config);
+    }
+
+    cpu_physical_memory_write(cur_offs,
+                              dev->vdev->config, dev->vdev->config_len);
+    cur_offs += dev->vdev->config_len;
+}
+
+void s390_virtio_device_update_status(VirtIOS390Device *dev)
+{
+    VirtIODevice *vdev = dev->vdev;
+    uint32_t features;
+
+    virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));
+
+    /* Update guest supported feature bitmap */
+
+    features = bswap32(ldl_be_phys(dev->feat_offs));
+    virtio_set_features(vdev, features);
+}
+
+VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus)
+{
+    return bus->console;
+}
+
+/* Find a device by vring address */
+VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
+                                             ram_addr_t mem,
+                                             int *vq_num)
+{
+    BusChild *kid;
+    int i;
+
+    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
+        VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
+
+        for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+            if (!virtio_queue_get_addr(dev->vdev, i))
+                break;
+            if (virtio_queue_get_addr(dev->vdev, i) == mem) {
+                if (vq_num) {
+                    *vq_num = i;
+                }
+                return dev;
+            }
+        }
+    }
+
+    return NULL;
+}
+
+/* Find a device by device descriptor location */
+VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem)
+{
+    BusChild *kid;
+
+    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
+        VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
+        if (dev->dev_offs == mem) {
+            return dev;
+        }
+    }
+
+    return NULL;
+}
+
+/* DeviceState to VirtIOS390Device. Note: used on datapath,
+ * be careful and test performance if you change this.
+ */
+static inline VirtIOS390Device *to_virtio_s390_device_fast(DeviceState *d)
+{
+    return container_of(d, VirtIOS390Device, qdev);
+}
+
+/* DeviceState to VirtIOS390Device. TODO: use QOM. */
+static inline VirtIOS390Device *to_virtio_s390_device(DeviceState *d)
+{
+    return container_of(d, VirtIOS390Device, qdev);
+}
+
+static void virtio_s390_notify(DeviceState *d, uint16_t vector)
+{
+    VirtIOS390Device *dev = to_virtio_s390_device_fast(d);
+    uint64_t token = s390_virtio_device_vq_token(dev, vector);
+    S390CPU *cpu = s390_cpu_addr2state(0);
+
+    s390_virtio_irq(cpu, 0, token);
+}
+
+static unsigned virtio_s390_get_features(DeviceState *d)
+{
+    VirtIOS390Device *dev = to_virtio_s390_device(d);
+    return dev->host_features;
+}
+
+/**************** S390 Virtio Bus Device Descriptions *******************/
+
+static const VirtIOBindings virtio_s390_bindings = {
+    .notify = virtio_s390_notify,
+    .get_features = virtio_s390_get_features,
+};
+
+static Property s390_virtio_net_properties[] = {
+    DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
+    DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
+                       net.txtimer, TX_TIMER_INTERVAL),
+    DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
+                      net.txburst, TX_BURST),
+    DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_net_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+    k->init = s390_virtio_net_init;
+    dc->props = s390_virtio_net_properties;
+}
+
+static const TypeInfo s390_virtio_net = {
+    .name          = "virtio-net-s390",
+    .parent        = TYPE_VIRTIO_S390_DEVICE,
+    .instance_size = sizeof(VirtIOS390Device),
+    .class_init    = s390_virtio_net_class_init,
+};
+
+static Property s390_virtio_blk_properties[] = {
+    DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, blk.conf),
+    DEFINE_BLOCK_CHS_PROPERTIES(VirtIOS390Device, blk.conf),
+    DEFINE_PROP_STRING("serial", VirtIOS390Device, blk.serial),
+#ifdef __linux__
+    DEFINE_PROP_BIT("scsi", VirtIOS390Device, blk.scsi, 0, true),
+#endif
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_blk_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+    k->init = s390_virtio_blk_init;
+    dc->props = s390_virtio_blk_properties;
+}
+
+static const TypeInfo s390_virtio_blk = {
+    .name          = "virtio-blk-s390",
+    .parent        = TYPE_VIRTIO_S390_DEVICE,
+    .instance_size = sizeof(VirtIOS390Device),
+    .class_init    = s390_virtio_blk_class_init,
+};
+
+static Property s390_virtio_serial_properties[] = {
+    DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
+                       serial.max_virtserial_ports, 31),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_serial_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+    k->init = s390_virtio_serial_init;
+    dc->props = s390_virtio_serial_properties;
+}
+
+static const TypeInfo s390_virtio_serial = {
+    .name          = "virtio-serial-s390",
+    .parent        = TYPE_VIRTIO_S390_DEVICE,
+    .instance_size = sizeof(VirtIOS390Device),
+    .class_init    = s390_virtio_serial_class_init,
+};
+
+static void s390_virtio_rng_initfn(Object *obj)
+{
+    VirtIOS390Device *dev = VIRTIO_S390_DEVICE(obj);
+
+    object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
+                             (Object **)&dev->rng.rng, NULL);
+}
+
+static void s390_virtio_rng_class_init(ObjectClass *klass, void *data)
+{
+    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+    k->init = s390_virtio_rng_init;
+}
+
+static const TypeInfo s390_virtio_rng = {
+    .name          = "virtio-rng-s390",
+    .parent        = TYPE_VIRTIO_S390_DEVICE,
+    .instance_size = sizeof(VirtIOS390Device),
+    .instance_init = s390_virtio_rng_initfn,
+    .class_init    = s390_virtio_rng_class_init,
+};
+
+static int s390_virtio_busdev_init(DeviceState *dev)
+{
+    VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
+    VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev);
+
+    virtio_s390_bus_new(&_dev->bus, _dev);
+
+    return _info->init(_dev);
+}
+
+static void s390_virtio_busdev_reset(DeviceState *dev)
+{
+    VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
+
+    virtio_reset(_dev->vdev);
+}
+
+static void virtio_s390_device_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->init = s390_virtio_busdev_init;
+    dc->bus_type = TYPE_S390_VIRTIO_BUS;
+    dc->unplug = qdev_simple_unplug_cb;
+    dc->reset = s390_virtio_busdev_reset;
+}
+
+static const TypeInfo virtio_s390_device_info = {
+    .name = TYPE_VIRTIO_S390_DEVICE,
+    .parent = TYPE_DEVICE,
+    .instance_size = sizeof(VirtIOS390Device),
+    .class_init = virtio_s390_device_class_init,
+    .class_size = sizeof(VirtIOS390DeviceClass),
+    .abstract = true,
+};
+
+static Property s390_virtio_scsi_properties[] = {
+    DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOS390Device, host_features, scsi),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void s390_virtio_scsi_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
+
+    k->init = s390_virtio_scsi_init;
+    dc->props = s390_virtio_scsi_properties;
+}
+
+static const TypeInfo s390_virtio_scsi = {
+    .name          = "virtio-scsi-s390",
+    .parent        = TYPE_VIRTIO_S390_DEVICE,
+    .instance_size = sizeof(VirtIOS390Device),
+    .class_init    = s390_virtio_scsi_class_init,
+};
+
+/***************** S390 Virtio Bus Bridge Device *******************/
+/* Only required to have the virtio bus as child in the system bus */
+
+static int s390_virtio_bridge_init(SysBusDevice *dev)
+{
+    /* nothing */
+    return 0;
+}
+
+static void s390_virtio_bridge_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = s390_virtio_bridge_init;
+    dc->no_user = 1;
+}
+
+static const TypeInfo s390_virtio_bridge_info = {
+    .name          = "s390-virtio-bridge",
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(SysBusDevice),
+    .class_init    = s390_virtio_bridge_class_init,
+};
+
+/* virtio-s390-bus */
+
+void virtio_s390_bus_new(VirtioBusState *bus, VirtIOS390Device *dev)
+{
+    DeviceState *qdev = DEVICE(dev);
+    BusState *qbus;
+    qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_S390_BUS, qdev, NULL);
+    qbus = BUS(bus);
+    qbus->allow_hotplug = 0;
+}
+
+static void virtio_s390_bus_class_init(ObjectClass *klass, void *data)
+{
+    VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+    BusClass *bus_class = BUS_CLASS(klass);
+    bus_class->max_dev = 1;
+    k->notify = virtio_s390_notify;
+    k->get_features = virtio_s390_get_features;
+}
+
+static const TypeInfo virtio_s390_bus_info = {
+    .name          = TYPE_VIRTIO_S390_BUS,
+    .parent        = TYPE_VIRTIO_BUS,
+    .instance_size = sizeof(VirtioS390BusState),
+    .class_init    = virtio_s390_bus_class_init,
+};
+
+static void s390_virtio_register_types(void)
+{
+    type_register_static(&virtio_s390_bus_info);
+    type_register_static(&s390_virtio_bus_info);
+    type_register_static(&virtio_s390_device_info);
+    type_register_static(&s390_virtio_serial);
+    type_register_static(&s390_virtio_blk);
+    type_register_static(&s390_virtio_net);
+    type_register_static(&s390_virtio_scsi);
+    type_register_static(&s390_virtio_rng);
+    type_register_static(&s390_virtio_bridge_info);
+}
+
+type_init(s390_virtio_register_types)
diff --git a/hw/s390x/s390-virtio-bus.h b/hw/s390x/s390-virtio-bus.h
new file mode 100644
index 0000000..4aacf83
--- /dev/null
+++ b/hw/s390x/s390-virtio-bus.h
@@ -0,0 +1,124 @@
+/*
+ * QEMU S390x VirtIO BUS definitions
+ *
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef HW_S390_VIRTIO_BUS_H
+#define HW_S390_VIRTIO_BUS_H 1
+
+#include "hw/virtio-blk.h"
+#include "hw/virtio-net.h"
+#include "hw/virtio-rng.h"
+#include "hw/virtio-serial.h"
+#include "hw/virtio-scsi.h"
+#include "hw/virtio-bus.h"
+
+#define VIRTIO_DEV_OFFS_TYPE		0	/* 8 bits */
+#define VIRTIO_DEV_OFFS_NUM_VQ		1	/* 8 bits */
+#define VIRTIO_DEV_OFFS_FEATURE_LEN	2	/* 8 bits */
+#define VIRTIO_DEV_OFFS_CONFIG_LEN	3	/* 8 bits */
+#define VIRTIO_DEV_OFFS_STATUS		4	/* 8 bits */
+#define VIRTIO_DEV_OFFS_CONFIG		5	/* dynamic */
+
+#define VIRTIO_VQCONFIG_OFFS_TOKEN	0	/* 64 bits */
+#define VIRTIO_VQCONFIG_OFFS_ADDRESS	8	/* 64 bits */
+#define VIRTIO_VQCONFIG_OFFS_NUM	16	/* 16 bits */
+#define VIRTIO_VQCONFIG_LEN		24
+
+#define VIRTIO_RING_LEN			(TARGET_PAGE_SIZE * 3)
+#define VIRTIO_VRING_AVAIL_IDX_OFFS 2
+#define VIRTIO_VRING_USED_IDX_OFFS 2
+#define S390_DEVICE_PAGES		512
+
+#define VIRTIO_PARAM_MASK               0xff
+#define VIRTIO_PARAM_VRING_INTERRUPT    0x0
+#define VIRTIO_PARAM_CONFIG_CHANGED     0x1
+#define VIRTIO_PARAM_DEV_ADD            0x2
+
+#define TYPE_VIRTIO_S390_DEVICE "virtio-s390-device"
+#define VIRTIO_S390_DEVICE(obj) \
+     OBJECT_CHECK(VirtIOS390Device, (obj), TYPE_VIRTIO_S390_DEVICE)
+#define VIRTIO_S390_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(VirtIOS390DeviceClass, (klass), TYPE_VIRTIO_S390_DEVICE)
+#define VIRTIO_S390_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(VirtIOS390DeviceClass, (obj), TYPE_VIRTIO_S390_DEVICE)
+
+#define TYPE_S390_VIRTIO_BUS "s390-virtio-bus"
+#define S390_VIRTIO_BUS(obj) \
+     OBJECT_CHECK(VirtIOS390Bus, (obj), TYPE_S390_VIRTIO_BUS)
+
+/* virtio-s390-bus */
+
+typedef struct VirtioBusState VirtioS390BusState;
+typedef struct VirtioBusClass VirtioS390BusClass;
+
+#define TYPE_VIRTIO_S390_BUS "virtio-s390-bus"
+#define VIRTIO_S390_BUS(obj) \
+        OBJECT_CHECK(VirtioS390BusState, (obj), TYPE_VIRTIO_S390_BUS)
+#define VIRTIO_S390_BUS_GET_CLASS(obj) \
+        OBJECT_GET_CLASS(VirtioS390BusClass, obj, TYPE_VIRTIO_S390_BUS)
+#define VIRTIO_S390_BUS_CLASS(klass) \
+        OBJECT_CLASS_CHECK(VirtioS390BusClass, klass, TYPE_VIRTIO_S390_BUS)
+
+
+typedef struct VirtIOS390Device VirtIOS390Device;
+
+void virtio_s390_bus_new(VirtioBusState *bus, VirtIOS390Device *dev);
+
+typedef struct VirtIOS390DeviceClass {
+    DeviceClass qdev;
+    int (*init)(VirtIOS390Device *dev);
+} VirtIOS390DeviceClass;
+
+struct VirtIOS390Device {
+    DeviceState qdev;
+    ram_addr_t dev_offs;
+    ram_addr_t feat_offs;
+    uint8_t feat_len;
+    VirtIODevice *vdev;
+    VirtIOBlkConf blk;
+    NICConf nic;
+    uint32_t host_features;
+    virtio_serial_conf serial;
+    virtio_net_conf net;
+    VirtIOSCSIConf scsi;
+    VirtIORNGConf rng;
+    VirtioBusState bus;
+};
+
+typedef struct VirtIOS390Bus {
+    BusState bus;
+
+    VirtIOS390Device *console;
+    ram_addr_t dev_page;
+    ram_addr_t dev_offs;
+    ram_addr_t next_ring;
+} VirtIOS390Bus;
+
+
+void s390_virtio_device_update_status(VirtIOS390Device *dev);
+
+VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
+VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);
+
+VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
+                                             ram_addr_t mem, int *vq_num);
+VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem);
+void s390_virtio_device_sync(VirtIOS390Device *dev);
+void s390_virtio_reset_idx(VirtIOS390Device *dev);
+
+
+#endif
diff --git a/hw/s390x/s390-virtio-hcall.c b/hw/s390x/s390-virtio-hcall.c
index d7938c0..ee62649 100644
--- a/hw/s390x/s390-virtio-hcall.c
+++ b/hw/s390x/s390-virtio-hcall.c
@@ -10,7 +10,7 @@
  */
 
 #include "cpu.h"
-#include "hw/s390-virtio.h"
+#include "hw/s390x/s390-virtio.h"
 
 #define MAX_DIAG_SUBCODES 255
 
diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c
new file mode 100644
index 0000000..a8a489d
--- /dev/null
+++ b/hw/s390x/s390-virtio.c
@@ -0,0 +1,290 @@
+/*
+ * QEMU S390 virtio target
+ *
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ * Copyright IBM Corp 2012
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * Contributions after 2012-10-29 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ *
+ * You should have received a copy of the GNU (Lesser) General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "block/block.h"
+#include "sysemu/blockdev.h"
+#include "sysemu/sysemu.h"
+#include "net/net.h"
+#include "hw/boards.h"
+#include "monitor/monitor.h"
+#include "hw/loader.h"
+#include "hw/virtio.h"
+#include "hw/sysbus.h"
+#include "sysemu/kvm.h"
+#include "exec/address-spaces.h"
+
+#include "hw/s390x/s390-virtio-bus.h"
+#include "hw/s390x/sclp.h"
+#include "hw/s390x/s390-virtio.h"
+
+//#define DEBUG_S390
+
+#ifdef DEBUG_S390
+#define dprintf(fmt, ...) \
+    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+    do { } while (0)
+#endif
+
+#define MAX_BLK_DEVS                    10
+
+static VirtIOS390Bus *s390_bus;
+static S390CPU **ipi_states;
+
+S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
+{
+    if (cpu_addr >= smp_cpus) {
+        return NULL;
+    }
+
+    return ipi_states[cpu_addr];
+}
+
+static int s390_virtio_hcall_notify(const uint64_t *args)
+{
+    uint64_t mem = args[0];
+    int r = 0, i;
+
+    if (mem > ram_size) {
+        VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, mem, &i);
+        if (dev) {
+            virtio_queue_notify(dev->vdev, i);
+        } else {
+            r = -EINVAL;
+        }
+    } else {
+        /* Early printk */
+    }
+    return r;
+}
+
+static int s390_virtio_hcall_reset(const uint64_t *args)
+{
+    uint64_t mem = args[0];
+    VirtIOS390Device *dev;
+
+    dev = s390_virtio_bus_find_mem(s390_bus, mem);
+    virtio_reset(dev->vdev);
+    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
+    s390_virtio_device_sync(dev);
+    s390_virtio_reset_idx(dev);
+
+    return 0;
+}
+
+static int s390_virtio_hcall_set_status(const uint64_t *args)
+{
+    uint64_t mem = args[0];
+    int r = 0;
+    VirtIOS390Device *dev;
+
+    dev = s390_virtio_bus_find_mem(s390_bus, mem);
+    if (dev) {
+        s390_virtio_device_update_status(dev);
+    } else {
+        r = -EINVAL;
+    }
+    return r;
+}
+
+static void s390_virtio_register_hcalls(void)
+{
+    s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
+                                   s390_virtio_hcall_notify);
+    s390_register_virtio_hypercall(KVM_S390_VIRTIO_RESET,
+                                   s390_virtio_hcall_reset);
+    s390_register_virtio_hypercall(KVM_S390_VIRTIO_SET_STATUS,
+                                   s390_virtio_hcall_set_status);
+}
+
+/*
+ * The number of running CPUs. On s390 a shutdown is the state of all CPUs
+ * being either stopped or disabled (for interrupts) waiting. We have to
+ * track this number to call the shutdown sequence accordingly. This
+ * number is modified either on startup or while holding the big qemu lock.
+ */
+static unsigned s390_running_cpus;
+
+void s390_add_running_cpu(CPUS390XState *env)
+{
+    if (env->halted) {
+        s390_running_cpus++;
+        env->halted = 0;
+        env->exception_index = -1;
+    }
+}
+
+unsigned s390_del_running_cpu(CPUS390XState *env)
+{
+    if (env->halted == 0) {
+        assert(s390_running_cpus >= 1);
+        s390_running_cpus--;
+        env->halted = 1;
+        env->exception_index = EXCP_HLT;
+    }
+    return s390_running_cpus;
+}
+
+void s390_init_ipl_dev(const char *kernel_filename,
+                       const char *kernel_cmdline,
+                       const char *initrd_filename)
+{
+    DeviceState *dev;
+
+    dev  = qdev_create(NULL, "s390-ipl");
+    if (kernel_filename) {
+        qdev_prop_set_string(dev, "kernel", kernel_filename);
+    }
+    if (initrd_filename) {
+        qdev_prop_set_string(dev, "initrd", initrd_filename);
+    }
+    qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
+    qdev_init_nofail(dev);
+}
+
+void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys)
+{
+    int i;
+
+    if (cpu_model == NULL) {
+        cpu_model = "host";
+    }
+
+    ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
+
+    for (i = 0; i < smp_cpus; i++) {
+        S390CPU *cpu;
+
+        cpu = cpu_s390x_init(cpu_model);
+
+        ipi_states[i] = cpu;
+        cpu->env.halted = 1;
+        cpu->env.exception_index = EXCP_HLT;
+        cpu->env.storage_keys = storage_keys;
+    }
+}
+
+
+void s390_create_virtio_net(BusState *bus, const char *name)
+{
+    int i;
+
+    for (i = 0; i < nb_nics; i++) {
+        NICInfo *nd = &nd_table[i];
+        DeviceState *dev;
+
+        if (!nd->model) {
+            nd->model = g_strdup("virtio");
+        }
+
+        if (strcmp(nd->model, "virtio")) {
+            fprintf(stderr, "S390 only supports VirtIO nics\n");
+            exit(1);
+        }
+
+        dev = qdev_create(bus, name);
+        qdev_set_nic_properties(dev, nd);
+        qdev_init_nofail(dev);
+    }
+}
+
+/* PC hardware initialisation */
+static void s390_init(QEMUMachineInitArgs *args)
+{
+    ram_addr_t my_ram_size = args->ram_size;
+    MemoryRegion *sysmem = get_system_memory();
+    MemoryRegion *ram = g_new(MemoryRegion, 1);
+    int shift = 0;
+    uint8_t *storage_keys;
+    void *virtio_region;
+    hwaddr virtio_region_len;
+    hwaddr virtio_region_start;
+
+    /* s390x ram size detection needs a 16bit multiplier + an increment. So
+       guests > 64GB can be specified in 2MB steps etc. */
+    while ((my_ram_size >> (20 + shift)) > 65535) {
+        shift++;
+    }
+    my_ram_size = my_ram_size >> (20 + shift) << (20 + shift);
+
+    /* lets propagate the changed ram size into the global variable. */
+    ram_size = my_ram_size;
+
+    /* get a BUS */
+    s390_bus = s390_virtio_bus_init(&my_ram_size);
+    s390_sclp_init();
+    s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline,
+                      args->initrd_filename);
+
+    /* register hypercalls */
+    s390_virtio_register_hcalls();
+
+    /* allocate RAM */
+    memory_region_init_ram(ram, "s390.ram", my_ram_size);
+    vmstate_register_ram_global(ram);
+    memory_region_add_subregion(sysmem, 0, ram);
+
+    /* clear virtio region */
+    virtio_region_len = my_ram_size - ram_size;
+    virtio_region_start = ram_size;
+    virtio_region = cpu_physical_memory_map(virtio_region_start,
+                                            &virtio_region_len, true);
+    memset(virtio_region, 0, virtio_region_len);
+    cpu_physical_memory_unmap(virtio_region, virtio_region_len, 1,
+                              virtio_region_len);
+
+    /* allocate storage keys */
+    storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
+
+    /* init CPUs */
+    s390_init_cpus(args->cpu_model, storage_keys);
+
+    /* Create VirtIO network adapters */
+    s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390");
+}
+
+static QEMUMachine s390_machine = {
+    .name = "s390-virtio",
+    .alias = "s390",
+    .desc = "VirtIO based S390 machine",
+    .init = s390_init,
+    .block_default_type = IF_VIRTIO,
+    .no_cdrom = 1,
+    .no_floppy = 1,
+    .no_serial = 1,
+    .no_parallel = 1,
+    .no_sdcard = 1,
+    .use_virtcon = 1,
+    .max_cpus = 255,
+    .is_default = 1,
+    DEFAULT_MACHINE_OPTIONS,
+};
+
+static void s390_machine_init(void)
+{
+    qemu_register_machine(&s390_machine);
+}
+
+machine_init(s390_machine_init);
diff --git a/hw/s390x/s390-virtio.h b/hw/s390x/s390-virtio.h
new file mode 100644
index 0000000..67bfd20
--- /dev/null
+++ b/hw/s390x/s390-virtio.h
@@ -0,0 +1,27 @@
+/*
+ * Virtio interfaces for s390
+ *
+ * Copyright 2012 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef HW_S390_VIRTIO_H
+#define HW_S390_VIRTIO_H 1
+
+#define KVM_S390_VIRTIO_NOTIFY          0
+#define KVM_S390_VIRTIO_RESET           1
+#define KVM_S390_VIRTIO_SET_STATUS      2
+
+typedef int (*s390_virtio_fn)(const uint64_t *args);
+void s390_register_virtio_hypercall(uint64_t code, s390_virtio_fn fn);
+
+void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys);
+void s390_init_ipl_dev(const char *kernel_filename,
+                       const char *kernel_cmdline,
+                       const char *initrd_filename);
+void s390_create_virtio_net(BusState *bus, const char *name);
+#endif