[PATCH 3/5] s390: Add new channel I/O based virtio transport.

Cornelia Huck
2012-08-07T14:52:51Z

Add a new virtio transport that uses channel commands to perform
virtio operations.

Add a new machine type s390-ccw that uses this virtio-ccw transport
and make it the default machine for s390.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
hw/qdev-monitor.c | 5 +
hw/s390-virtio.c | 268 ++++++++++----
hw/s390x/Makefile.objs | 1 +
hw/s390x/virtio-ccw.c | 962 +++++++++++++++++++++++++++++++++++++++++++++++++
hw/s390x/virtio-ccw.h | 77 ++++
vl.c | 1 +
6 files changed, 1243 insertions(+), 71 deletions(-)
create mode 100644 hw/s390x/virtio-ccw.c
create mode 100644 hw/s390x/virtio-ccw.h

diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c
index b22a37a..79f7e6b 100644
--- a/hw/qdev-monitor.c
+++ b/hw/qdev-monitor.c
@@ -42,6 +42,11 @@ static const QDevAlias qdev_alias_table[] = {
{ "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X },
{ "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X },
{ "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
+ { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
+ { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
+ { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
+ { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
+ { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
{ "lsi53c895a", "lsi" },
{ "ich9-ahci", "ahci" },
{ }
diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c
index 47eed35..b8bdf80 100644
--- a/hw/s390-virtio.c
+++ b/hw/s390-virtio.c
@@ -30,8 +30,11 @@
#include "hw/sysbus.h"
#include "kvm.h"
#include "exec-memory.h"
+#include "qemu-thread.h"

#include "hw/s390-virtio-bus.h"
+#include "hw/s390x/css.h"
+#include "hw/s390x/virtio-ccw.h"

//#define DEBUG_S390

@@ -46,6 +49,7 @@
#define KVM_S390_VIRTIO_NOTIFY 0
#define KVM_S390_VIRTIO_RESET 1
#define KVM_S390_VIRTIO_SET_STATUS 2
+#define KVM_S390_VIRTIO_CCW_NOTIFY 3

#define KERN_IMAGE_START 0x010000UL
#define KERN_PARM_AREA 0x010480UL
@@ -62,6 +66,7 @@

static VirtIOS390Bus *s390_bus;
static S390CPU **ipi_states;
+VirtioCcwBus *ccw_bus;

S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
{
@@ -75,15 +80,21 @@ S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
int s390_virtio_hypercall(CPUS390XState *env, uint64_t mem, uint64_t hypercall)
{
int r = 0, i;
+ int cssid, ssid, schid, m;
+ SubchDev *sch;

dprintf("KVM hypercall: %ld\n", hypercall);
switch (hypercall) {
case KVM_S390_VIRTIO_NOTIFY:
if (mem > ram_size) {
- VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
- mem, &i);
- if (dev) {
- virtio_queue_notify(dev->vdev, i);
+ if (s390_bus) {
+ VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
+ mem, &i);
+ if (dev) {
+ virtio_queue_notify(dev->vdev, i);
+ } else {
+ r = -EINVAL;
+ }
} else {
r = -EINVAL;
}
@@ -92,28 +103,49 @@ int s390_virtio_hypercall(CPUS390XState *env, uint64_t mem, uint64_t hypercall)
}
break;
case KVM_S390_VIRTIO_RESET:
- {
- 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);
+ if (s390_bus) {
+ 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);
+ } else {
+ r = -EINVAL;
+ }
break;
- }
case KVM_S390_VIRTIO_SET_STATUS:
- {
- VirtIOS390Device *dev;
+ if (s390_bus) {
+ VirtIOS390Device *dev;

- dev = s390_virtio_bus_find_mem(s390_bus, mem);
- if (dev) {
- s390_virtio_device_update_status(dev);
+ dev = s390_virtio_bus_find_mem(s390_bus, mem);
+ if (dev) {
+ s390_virtio_device_update_status(dev);
+ } else {
+ r = -EINVAL;
+ }
} else {
r = -EINVAL;
}
break;
- }
+ case KVM_S390_VIRTIO_CCW_NOTIFY:
+ if (ccw_bus) {
+ if (ioinst_disassemble_sch_ident(env->regs[2], &m, &cssid, &ssid,
+ &schid)) {
+ r = -EINVAL;
+ } else {
+ sch = css_find_subch(m, cssid, ssid, schid);
+ if (sch) {
+ virtio_queue_notify(virtio_ccw_get_vdev(sch), env->regs[3]);
+ } else {
+ r = -EINVAL;
+ }
+ }
+ } else {
+ r = -EINVAL;
+ }
+ break;
default:
r = -EINVAL;
break;
@@ -150,58 +182,12 @@ unsigned s390_del_running_cpu(CPUS390XState *env)
return s390_running_cpus;
}

-/* PC hardware initialisation */
-static void s390_init(ram_addr_t my_ram_size,
- const char *boot_device,
- const char *kernel_filename,
- const char *kernel_cmdline,
- const char *initrd_filename,
- const char *cpu_model)
+static CPUS390XState *s390_init_cpus(const char *cpu_model,
+ uint8_t *storage_keys)
{
CPUS390XState *env = NULL;
- MemoryRegion *sysmem = get_system_memory();
- MemoryRegion *ram = g_new(MemoryRegion, 1);
- ram_addr_t kernel_size = 0;
- ram_addr_t initrd_offset;
- ram_addr_t initrd_size = 0;
- int shift = 0;
- uint8_t *storage_keys;
- void *virtio_region;
- target_phys_addr_t virtio_region_len;
- target_phys_addr_t virtio_region_start;
int i;

- /* 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);
-
- /* 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 */
if (cpu_model == NULL) {
cpu_model = "host";
}
@@ -222,6 +208,17 @@ static void s390_init(ram_addr_t my_ram_size,
tmp_env->exception_index = EXCP_HLT;
tmp_env->storage_keys = storage_keys;
}
+ return env;
+}
+
+static void s390_set_up_kernel(CPUS390XState *env,
+ const char *kernel_filename,
+ const char *kernel_cmdline,
+ const char *initrd_filename)
+{
+ ram_addr_t kernel_size = 0;
+ ram_addr_t initrd_offset;
+ ram_addr_t initrd_size = 0;

/* One CPU has to run */
s390_add_running_cpu(env);
@@ -294,8 +291,13 @@ static void s390_init(ram_addr_t my_ram_size,
strlen(kernel_cmdline) + 1);
}

- /* Create VirtIO network adapters */
- for(i = 0; i < nb_nics; i++) {
+}
+
+static 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;

@@ -308,7 +310,7 @@ static void s390_init(ram_addr_t my_ram_size,
exit(1);
}

- dev = qdev_create((BusState *)s390_bus, "virtio-net-s390");
+ dev = qdev_create(bus, name);
qdev_set_nic_properties(dev, nd);
qdev_init_nofail(dev);
}
@@ -329,6 +331,63 @@ static void s390_init(ram_addr_t my_ram_size,
}
}

+/* PC hardware initialisation */
+static void s390_init(ram_addr_t my_ram_size,
+ const char *boot_device,
+ const char *kernel_filename,
+ const char *kernel_cmdline,
+ const char *initrd_filename,
+ const char *cpu_model)
+{
+ CPUS390XState *env = NULL;
+ MemoryRegion *sysmem = get_system_memory();
+ MemoryRegion *ram = g_new(MemoryRegion, 1);
+ int shift = 0;
+ uint8_t *storage_keys;
+ void *virtio_region;
+ target_phys_addr_t virtio_region_len;
+ target_phys_addr_t 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);
+
+ /* 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 */
+ env = s390_init_cpus(cpu_model, storage_keys);
+
+ s390_set_up_kernel(env, kernel_filename, kernel_cmdline, initrd_filename);
+
+ /* Create VirtIO network adapters */
+ s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390");
+
+}
+
static QEMUMachine s390_machine = {
.name = "s390-virtio",
.alias = "s390",
@@ -341,7 +400,6 @@ static QEMUMachine s390_machine = {
.no_sdcard = 1,
.use_virtcon = 1,
.max_cpus = 255,
- .is_default = 1,
};

static void s390_machine_init(void)
@@ -350,3 +408,71 @@ static void s390_machine_init(void)
}

machine_init(s390_machine_init);
+
+static void ccw_init(ram_addr_t my_ram_size,
+ const char *boot_device,
+ const char *kernel_filename,
+ const char *kernel_cmdline,
+ const char *initrd_filename,
+ const char *cpu_model)
+{
+ CPUS390XState *env = NULL;
+ MemoryRegion *sysmem = get_system_memory();
+ MemoryRegion *ram = g_new(MemoryRegion, 1);
+ int shift = 0;
+ uint8_t *storage_keys;
+
+ /* 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 */
+ ccw_bus = virtio_ccw_bus_init();
+
+ /* allocate RAM */
+ memory_region_init_ram(ram, "s390.ram", my_ram_size);
+ vmstate_register_ram_global(ram);
+ memory_region_add_subregion(sysmem, 0, ram);
+
+ /* allocate storage keys */
+ storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
+
+ /* init CPUs */
+ env = s390_init_cpus(cpu_model, storage_keys);
+
+ kvm_s390_enable_css_support(env);
+
+ s390_set_up_kernel(env, kernel_filename, kernel_cmdline, initrd_filename);
+
+ /* Create VirtIO network adapters */
+ s390_create_virtio_net((BusState *)ccw_bus, "virtio-net-ccw");
+
+}
+
+static QEMUMachine ccw_machine = {
+ .name = "s390-ccw-virtio",
+ .alias = "s390-ccw",
+ .desc = "VirtIO-ccw based S390 machine",
+ .init = ccw_init,
+ .no_cdrom = 1,
+ .no_floppy = 1,
+ .no_serial = 1,
+ .no_parallel = 1,
+ .no_sdcard = 1,
+ .use_virtcon = 1,
+ .max_cpus = 255,
+ .is_default = 1,
+};
+
+static void ccw_machine_init(void)
+{
+ qemu_register_machine(&ccw_machine);
+}
+
+machine_init(ccw_machine_init);
diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index 93b41fb..e4c3d6f 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -2,3 +2,4 @@ obj-y = s390-virtio-bus.o s390-virtio.o

obj-y := $(addprefix ../,$(obj-y))
obj-y += css.o
+obj-y += virtio-ccw.o
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
new file mode 100644
index 0000000..8a90c3a
--- /dev/null
+++ b/hw/s390x/virtio-ccw.c
@@ -0,0 +1,962 @@
+/*
+ * virtio ccw target implementation
+ *
+ * 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.
+ */
+
+#include <hw/hw.h>
+#include "block.h"
+#include "blockdev.h"
+#include "sysemu.h"
+#include "net.h"
+#include "monitor.h"
+#include "qemu-thread.h"
+#include "../virtio.h"
+#include "../virtio-serial.h"
+#include "../virtio-net.h"
+#include "../sysbus.h"
+#include "bitops.h"
+
+#include "ioinst.h"
+#include "css.h"
+#include "virtio-ccw.h"
+
+static const TypeInfo virtio_ccw_bus_info = {
+ .name = TYPE_VIRTIO_CCW_BUS,
+ .parent = TYPE_BUS,
+ .instance_size = sizeof(VirtioCcwBus),
+};
+
+static const VirtIOBindings virtio_ccw_bindings;
+
+typedef struct sch_entry {
+ SubchDev *sch;
+ QLIST_ENTRY(sch_entry) entry;
+} sch_entry;
+
+QLIST_HEAD(subch_list, sch_entry);
+
+typedef struct devno_entry {
+ uint16_t devno;
+ QLIST_ENTRY(devno_entry) entry;
+} devno_entry;
+
+QLIST_HEAD(devno_list, devno_entry);
+
+struct subch_set {
+ struct subch_list *s_list[256];
+ struct devno_list *d_list[256];
+};
+
+struct css_set {
+ struct subch_set *set[MAX_SSID + 1];
+};
+
+static struct css_set *channel_subsys[MAX_CSSID + 1];
+
+VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
+{
+ VirtIODevice *vdev = NULL;
+
+ if (sch->driver_data) {
+ vdev = ((VirtioCcwData *)sch->driver_data)->vdev;
+ }
+ return vdev;
+}
+
+static SubchDev *virtio_ccw_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid,
+ uint16_t schid)
+{
+ struct sch_entry *sch_entry;
+ struct subch_list *list;
+ SubchDev *sch = NULL;
+ uint8_t real_cssid;
+
+ real_cssid = (!m && (cssid == 0)) ? VIRTUAL_CSSID : cssid;
+ if (!channel_subsys[real_cssid]) {
+ return NULL;
+ }
+ if (!channel_subsys[real_cssid]->set[ssid]) {
+ return NULL;
+ }
+ if (!channel_subsys[real_cssid]->set[ssid]->s_list[schid >> 8]) {
+ return NULL;
+ }
+
+ list = channel_subsys[real_cssid]->set[ssid]->s_list[schid >> 8];
+
+ QLIST_FOREACH(sch_entry, list, entry) {
+ if (sch_entry->sch->schid == schid) {
+ sch = sch_entry->sch;
+ break;
+ }
+ }
+
+ return sch;
+}
+
+static bool virtio_ccw_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno)
+{
+ struct devno_entry *devno_entry;
+ struct devno_list *list;
+ bool found = false;
+
+ if (!channel_subsys[cssid]) {
+ return false;
+ }
+ if (!channel_subsys[cssid]->set[ssid]) {
+ return false;
+ }
+ if (!channel_subsys[cssid]->set[ssid]->d_list[devno >> 8]) {
+ return false;
+ }
+
+ list = channel_subsys[cssid]->set[ssid]->d_list[devno >> 8];
+
+ QLIST_FOREACH(devno_entry, list, entry) {
+ if (devno_entry->devno == devno) {
+ found = true;
+ break;
+ }
+ }
+
+ return found;
+}
+
+static void virtio_ccw_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
+ uint16_t devno, SubchDev *sch)
+{
+ struct css_set *css;
+ struct subch_set *s_set;
+ struct subch_list *s_list;
+ struct devno_list *d_list;
+ struct sch_entry *sch_entry, *tmp;
+ struct devno_entry *devno_entry, *d_tmp;
+
+ if (!channel_subsys[cssid]) {
+ channel_subsys[cssid] = g_malloc0(sizeof(*channel_subsys[cssid]));
+ }
+ css = channel_subsys[cssid];
+
+ if (!css->set[ssid]) {
+ css->set[ssid] = g_malloc0(sizeof(*css->set[ssid]));
+ }
+ s_set = css->set[ssid];
+
+ if (!s_set->s_list[schid >> 8]) {
+ s_set->s_list[schid >> 8] =
+ g_malloc0(sizeof(*s_set->s_list[schid >> 8]));
+ QLIST_INIT(s_set->s_list[schid >> 8]);
+ }
+ s_list = s_set->s_list[schid >> 8];
+
+ if (!s_set->d_list[devno >> 8]) {
+ s_set->d_list[devno >> 8] =
+ g_malloc0(sizeof(*s_set->d_list[devno >> 8]));
+ QLIST_INIT(s_set->d_list[devno >> 8]);
+ }
+ d_list = s_set->d_list[devno >> 8];
+
+ if (sch) {
+ sch_entry = g_malloc0(sizeof(sch_entry));
+ sch_entry->sch = sch;
+ QLIST_INSERT_HEAD(s_list, sch_entry, entry);
+ devno_entry = g_malloc0(sizeof(devno_entry));
+ devno_entry->devno = devno;
+ QLIST_INSERT_HEAD(d_list, devno_entry, entry);
+ } else {
+ QLIST_FOREACH_SAFE(sch_entry, s_list, entry, tmp) {
+ if (sch_entry->sch->schid == schid) {
+ QLIST_REMOVE(sch_entry, entry);
+ g_free(sch_entry);
+ break;
+ }
+ }
+ QLIST_FOREACH_SAFE(devno_entry, d_list, entry, d_tmp) {
+ if (devno_entry->devno == devno) {
+ QLIST_REMOVE(devno_entry, entry);
+ g_free(devno_entry);
+ break;
+ }
+ }
+ }
+}
+
+VirtioCcwBus *virtio_ccw_bus_init(void)
+{
+ VirtioCcwBus *bus;
+ BusState *_bus;
+ DeviceState *dev;
+
+ css_set_subch_cb(virtio_ccw_find_subch);
+
+ /* Create bridge device */
+ dev = qdev_create(NULL, "virtio-ccw-bridge");
+ qdev_init_nofail(dev);
+
+ /* Create bus on bridge device */
+ _bus = qbus_create(TYPE_VIRTIO_CCW_BUS, dev, "virtio-ccw");
+ bus = DO_UPCAST(VirtioCcwBus, bus, _bus);
+
+ /* Enable hotplugging */
+ _bus->allow_hotplug = 1;
+
+ return bus;
+}
+
+struct vq_info_block {
+ uint64_t queue;
+ uint16_t num;
+} QEMU_PACKED;
+
+struct vq_config_block {
+ uint16_t index;
+ uint16_t num;
+} QEMU_PACKED;
+
+/* Specify where the virtqueues for the subchannel are in guest memory. */
+static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint16_t num)
+{
+ VirtioCcwData *data = sch->driver_data;
+
+ if (num > VIRTIO_PCI_QUEUE_MAX) {
+ return -EINVAL;
+ }
+
+ if (!data) {
+ return -EINVAL;
+ }
+
+ virtio_queue_set_addr(data->vdev, num, addr);
+ if (!addr) {
+ virtio_queue_set_vector(data->vdev, num, 0);
+ } else {
+ virtio_queue_set_vector(data->vdev, num, num);
+ }
+ return 0;
+}
+
+static int virtio_ccw_cb(SubchDev *sch, struct ccw1 *ccw)
+{
+ int ret;
+ struct vq_info_block info;
+ uint8_t status;
+ uint32_t features;
+ void *config;
+ uint64_t *indicators;
+ struct vq_config_block vq_config;
+ VirtioCcwData *data = sch->driver_data;
+ bool check_len;
+ int len;
+
+ if (!ccw) {
+ return -EIO;
+ }
+
+ if (!data) {
+ return -EINVAL;
+ }
+
+ check_len = !((ccw->flags & CCW_FLAG_SLI) && !(ccw->flags & CCW_FLAG_DC));
+
+ /* Look at the command. */
+ switch (ccw->cmd_code) {
+ case CCW_CMD_SET_VQ:
+ if (check_len) {
+ if (ccw->count != sizeof(info)) {
+ ret = -EINVAL;
+ break;
+ }
+ } else if (ccw->count < sizeof(info)) {
+ /* Can't execute command. */
+ ret = -EINVAL;
+ break;
+ }
+ if (!qemu_get_ram_ptr(ccw->cda)) {
+ ret = -EFAULT;
+ } else {
+ info.queue = ldq_phys(ccw->cda);
+ info.num = lduw_phys(ccw->cda + sizeof(info.queue));
+ ret = virtio_ccw_set_vqs(sch, info.queue, info.num);
+ sch->curr_status.scsw.count = 0;
+ }
+ break;
+ case CCW_CMD_VDEV_RESET:
+ virtio_reset(data->vdev);
+ ret = 0;
+ break;
+ case CCW_CMD_READ_FEAT:
+ if (check_len) {
+ if (ccw->count != sizeof(data->host_features)) {
+ ret = -EINVAL;
+ break;
+ }
+ } else if (ccw->count < sizeof(data->host_features)) {
+ /* Can't execute command. */
+ ret = -EINVAL;
+ break;
+ }
+ if (!qemu_get_ram_ptr(ccw->cda)) {
+ ret = -EFAULT;
+ } else {
+ stl_le_phys(ccw->cda, data->host_features);
+ sch->curr_status.scsw.count =
+ ccw->count - sizeof(data->host_features);
+ ret = 0;
+ }
+ break;
+ case CCW_CMD_WRITE_FEAT:
+ if (check_len) {
+ if (ccw->count != sizeof(data->vdev->guest_features)) {
+ ret = -EINVAL;
+ break;
+ }
+ } else if (ccw->count < sizeof(data->vdev->guest_features)) {
+ /* Can't execute command. */
+ ret = -EINVAL;
+ break;
+ }
+ if (!qemu_get_ram_ptr(ccw->cda)) {
+ ret = -EFAULT;
+ } else {
+ features = bswap32(ldl_phys(ccw->cda));
+ if (data->vdev->set_features) {
+ data->vdev->set_features(data->vdev, features);
+ }
+ data->vdev->guest_features = features;
+ sch->curr_status.scsw.count =
+ ccw->count - sizeof(data->vdev->guest_features);
+ ret = 0;
+ }
+ break;
+ case CCW_CMD_READ_CONF:
+ if (check_len) {
+ if (ccw->count > data->vdev->config_len) {
+ ret = -EINVAL;
+ break;
+ }
+ }
+ len = MIN(ccw->count, data->vdev->config_len);
+ if (!qemu_get_ram_ptr(ccw->cda)) {
+ ret = -EFAULT;
+ } else {
+ data->vdev->get_config(data->vdev, data->vdev->config);
+ cpu_physical_memory_write(ccw->cda, data->vdev->config, len);
+ sch->curr_status.scsw.count = ccw->count - len;
+ ret = 0;
+ }
+ break;
+ case CCW_CMD_WRITE_CONF:
+ if (check_len) {
+ if (ccw->count > data->vdev->config_len) {
+ ret = -EINVAL;
+ break;
+ }
+ }
+ len = MIN(ccw->count, data->vdev->config_len);
+ config = qemu_get_ram_ptr(ccw->cda);
+ if (!config) {
+ ret = -EFAULT;
+ } else {
+ memcpy(data->vdev->config, config, len);
+ if (data->vdev->set_config) {
+ data->vdev->set_config(data->vdev, data->vdev->config);
+ }
+ sch->curr_status.scsw.count = ccw->count - len;
+ ret = 0;
+ }
+ break;
+ case CCW_CMD_WRITE_STATUS:
+ if (check_len) {
+ if (ccw->count != sizeof(status)) {
+ ret = -EINVAL;
+ break;
+ }
+ } else if (ccw->count < sizeof(status)) {
+ /* Can't execute command. */
+ ret = -EINVAL;
+ break;
+ }
+ if (!qemu_get_ram_ptr(ccw->cda)) {
+ ret = -EFAULT;
+ } else {
+ status = ldub_phys(ccw->cda);
+ virtio_set_status(data->vdev, status);
+ sch->curr_status.scsw.count = ccw->count - sizeof(status);
+ ret = 0;
+ }
+ break;
+ case CCW_CMD_SET_IND:
+ if (check_len) {
+ if (ccw->count != sizeof(*indicators)) {
+ ret = -EINVAL;
+ break;
+ }
+ } else if (ccw->count < sizeof(*indicators)) {
+ /* Can't execute command. */
+ ret = -EINVAL;
+ break;
+ }
+ indicators = qemu_get_ram_ptr(ccw->cda);
+ if (!indicators) {
+ ret = -EFAULT;
+ } else {
+ data->indicators = ccw->cda;
+ sch->curr_status.scsw.count = ccw->count - sizeof(*indicators);
+ ret = 0;
+ }
+ break;
+ case CCW_CMD_READ_VQ_CONF:
+ if (check_len) {
+ if (ccw->count != sizeof(vq_config)) {
+ ret = -EINVAL;
+ break;
+ }
+ } else if (ccw->count < sizeof(vq_config)) {
+ /* Can't execute command. */
+ ret = -EINVAL;
+ break;
+ }
+ if (!qemu_get_ram_ptr(ccw->cda)) {
+ ret = -EFAULT;
+ } else {
+ vq_config.index = lduw_phys(ccw->cda);
+ vq_config.num = virtio_queue_get_num(data->vdev, vq_config.index);
+ stw_phys(ccw->cda + sizeof(vq_config.index), vq_config.num);
+ sch->curr_status.scsw.count = ccw->count - sizeof(vq_config);
+ ret = 0;
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+ return ret;
+}
+
+static int virtio_ccw_device_init(VirtioCcwData *dev, VirtIODevice *vdev)
+{
+ unsigned int cssid = 0;
+ unsigned int ssid = 0;
+ unsigned int schid;
+ unsigned int devno;
+ bool have_devno = false;
+ bool found = false;
+ SubchDev *sch;
+ int ret;
+ int num;
+
+ sch = g_malloc0(sizeof(SubchDev));
+
+ sch->driver_data = dev;
+ dev->sch = sch;
+
+ dev->vdev = vdev;
+ dev->indicators = 0;
+
+ /* Initialize subchannel structure. */
+ qemu_mutex_init(&sch->mutex);
+ sch->channel_prog = NULL;
+ sch->last_cmd = NULL;
+ sch->orb = NULL;
+ /*
+ * Use a device number if provided. Otherwise, fall back to subchannel
+ * number.
+ */
+ if (dev->bus_id) {
+ num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
+ if (num == 3) {
+ if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
+ ret = -EINVAL;
+ goto out_err;
+ }
+ /* Enforce use of virtual cssid. */
+ if (cssid != VIRTUAL_CSSID) {
+ ret = -EINVAL;
+ goto out_err;
+ }
+ if (virtio_ccw_devno_used(cssid, ssid, devno)) {
+ ret = -EEXIST;
+ goto out_err;
+ }
+ sch->cssid = cssid;
+ sch->ssid = ssid;
+ sch->devno = devno;
+ have_devno = true;
+ } else {
+ ret = -EINVAL;
+ goto out_err;
+ }
+ }
+
+ /* Find the next free id. */
+ if (have_devno) {
+ for (schid = 0; schid <= MAX_SCHID; schid++) {
+ if (!virtio_ccw_find_subch(1, cssid, ssid, schid)) {
+ sch->schid = schid;
+ virtio_ccw_subch_assign(cssid, ssid, schid, devno, sch);
+ found = true;
+ break;
+ }
+ }
+ if (!found) {
+ ret = -ENODEV;
+ goto out_err;
+ }
+ } else {
+ cssid = VIRTUAL_CSSID;
+ for (ssid = 0; ssid <= MAX_SSID; ssid++) {
+ for (schid = 0; schid <= MAX_SCHID; schid++) {
+ if (!virtio_ccw_find_subch(1, cssid, ssid, schid)) {
+ sch->cssid = cssid;
+ sch->ssid = ssid;
+ sch->schid = schid;
+ devno = schid;
+ /*
+ * If the devno is already taken, look further in this
+ * subchannel set.
+ */
+ while (virtio_ccw_devno_used(cssid, ssid, devno)) {
+ if (devno == MAX_SCHID) {
+ devno = 0;
+ } else if (devno == schid - 1) {
+ ret = -ENODEV;
+ goto out_err;
+ } else {
+ devno++;
+ }
+ }
+ sch->devno = devno;
+ virtio_ccw_subch_assign(cssid, ssid, schid, devno, sch);
+ found = true;
+ break;
+ }
+ }
+ if (found) {
+ break;
+ }
+ }
+ if (!found) {
+ ret = -ENODEV;
+ goto out_err;
+ }
+ }
+
+ /* Build initial schib. */
+ css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
+
+ sch->ccw_cb = virtio_ccw_cb;
+
+ /* Build senseid data. */
+ memset(&sch->id, 0, sizeof(struct senseid));
+ sch->id.reserved = 0xff;
+ sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
+ sch->id.cu_model = dev->vdev->device_id;
+
+ virtio_bind_device(vdev, &virtio_ccw_bindings, dev);
+ dev->host_features = vdev->get_features(vdev, dev->host_features);
+
+ s390_sch_hotplug(sch->cssid, sch->ssid, sch->schid, sch->devno,
+ &sch->curr_status, dev->qdev.hotplugged, 1, 1);
+ return 0;
+
+out_err:
+ dev->sch = NULL;
+ g_free(sch);
+ return ret;
+}
+
+static int virtio_ccw_exit(VirtioCcwData *dev)
+{
+ SubchDev *sch = dev->sch;
+
+ if (sch) {
+ virtio_ccw_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno,
+ NULL);
+ g_free(sch);
+ }
+ dev->indicators = 0;
+ return 0;
+}
+
+static int virtio_ccw_net_init(VirtioCcwData *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net);
+ if (!vdev) {
+ return -1;
+ }
+
+ return virtio_ccw_device_init(dev, vdev);
+}
+
+static int virtio_ccw_net_exit(VirtioCcwData *dev)
+{
+ virtio_net_exit(dev->vdev);
+ return virtio_ccw_exit(dev);
+}
+
+static int virtio_ccw_blk_init(VirtioCcwData *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_blk_init((DeviceState *)dev, &dev->blk);
+ if (!vdev) {
+ return -1;
+ }
+
+ return virtio_ccw_device_init(dev, vdev);
+}
+
+static int virtio_ccw_blk_exit(VirtioCcwData *dev)
+{
+ virtio_blk_exit(dev->vdev);
+ blockdev_mark_auto_del(dev->blk.conf.bs);
+ return virtio_ccw_exit(dev);
+}
+
+static int virtio_ccw_serial_init(VirtioCcwData *dev)
+{
+ VirtioCcwBus *bus;
+ VirtIODevice *vdev;
+ int r;
+
+ bus = DO_UPCAST(VirtioCcwBus, bus, dev->qdev.parent_bus);
+
+ vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
+ if (!vdev) {
+ return -1;
+ }
+
+ r = virtio_ccw_device_init(dev, vdev);
+ if (!r) {
+ bus->console = dev;
+ }
+
+ return r;
+}
+
+static int virtio_ccw_serial_exit(VirtioCcwData *dev)
+{
+ VirtioCcwBus *bus;
+
+ bus = DO_UPCAST(VirtioCcwBus, bus, dev->qdev.parent_bus);
+ bus->console = NULL;
+ virtio_serial_exit(dev->vdev);
+ return virtio_ccw_exit(dev);
+}
+
+static int virtio_ccw_balloon_init(VirtioCcwData *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_balloon_init((DeviceState *)dev);
+ if (!vdev) {
+ return -1;
+ }
+
+ return virtio_ccw_device_init(dev, vdev);
+}
+
+static int virtio_ccw_balloon_exit(VirtioCcwData *dev)
+{
+ virtio_balloon_exit(dev->vdev);
+ return virtio_ccw_exit(dev);
+}
+
+static int virtio_ccw_scsi_init(VirtioCcwData *dev)
+{
+ VirtIODevice *vdev;
+
+ vdev = virtio_scsi_init((DeviceState *)dev, &dev->scsi);
+ if (!vdev) {
+ return -1;
+ }
+
+ return virtio_ccw_device_init(dev, vdev);
+}
+
+static int virtio_ccw_scsi_exit(VirtioCcwData *dev)
+{
+ virtio_scsi_exit(dev->vdev);
+ return virtio_ccw_exit(dev);
+}
+
+VirtioCcwData *virtio_ccw_bus_console(VirtioCcwBus *bus)
+{
+ return bus->console;
+}
+
+static void virtio_ccw_notify(void *opaque, uint16_t vector)
+{
+ VirtioCcwData *dev = opaque;
+ SubchDev *sch = dev->sch;
+ uint64_t indicators;
+
+ if (vector >= VIRTIO_PCI_QUEUE_MAX) {
+ return;
+ }
+
+ qemu_mutex_lock(&sch->mutex);
+ indicators = ldq_phys(dev->indicators);
+ set_bit(vector, &indicators);
+ stq_phys(dev->indicators, indicators);
+
+ css_conditional_io_interrupt(sch);
+
+ qemu_mutex_unlock(&sch->mutex);
+}
+
+static unsigned virtio_ccw_get_features(void *opaque)
+{
+ VirtioCcwData *dev = opaque;
+
+ return dev->host_features;
+}
+
+void virtio_ccw_reset_subchannels(struct VirtioCcwBus *bus)
+{
+ BusChild *kid;
+ VirtioCcwData *data;
+
+ QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
+ data = (VirtioCcwData *)kid->child;
+ virtio_reset(data->vdev);
+ css_reset_sch(data->sch);
+ }
+}
+
+/**************** Virtio-ccw Bus Device Descriptions *******************/
+
+static const VirtIOBindings virtio_ccw_bindings = {
+ .notify = virtio_ccw_notify,
+ .get_features = virtio_ccw_get_features,
+};
+
+static Property virtio_ccw_net_properties[] = {
+ DEFINE_PROP_STRING("devno", VirtioCcwData, bus_id),
+ DEFINE_NIC_PROPERTIES(VirtioCcwData, nic),
+ DEFINE_PROP_UINT32("x-txtimer", VirtioCcwData,
+ net.txtimer, TX_TIMER_INTERVAL),
+ DEFINE_PROP_INT32("x-txburst", VirtioCcwData,
+ net.txburst, TX_BURST),
+ DEFINE_PROP_STRING("tx", VirtioCcwData, net.tx),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+ k->init = virtio_ccw_net_init;
+ k->exit = virtio_ccw_net_exit;
+ dc->props = virtio_ccw_net_properties;
+}
+
+static TypeInfo virtio_ccw_net = {
+ .name = "virtio-net-ccw",
+ .parent = TYPE_VIRTIO_CCW_DEVICE,
+ .instance_size = sizeof(VirtioCcwData),
+ .class_init = virtio_ccw_net_class_init,
+};
+
+static Property virtio_ccw_blk_properties[] = {
+ DEFINE_PROP_STRING("devno", VirtioCcwData, bus_id),
+ DEFINE_BLOCK_PROPERTIES(VirtioCcwData, blk.conf),
+ DEFINE_PROP_STRING("serial", VirtioCcwData, blk.serial),
+#ifdef __linux__
+ DEFINE_PROP_BIT("scsi", VirtioCcwData, blk.scsi, 0, true),
+#endif
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+ k->init = virtio_ccw_blk_init;
+ k->exit = virtio_ccw_blk_exit;
+ dc->props = virtio_ccw_blk_properties;
+}
+
+static TypeInfo virtio_ccw_blk = {
+ .name = "virtio-blk-ccw",
+ .parent = TYPE_VIRTIO_CCW_DEVICE,
+ .instance_size = sizeof(VirtioCcwData),
+ .class_init = virtio_ccw_blk_class_init,
+};
+
+static Property virtio_ccw_serial_properties[] = {
+ DEFINE_PROP_STRING("devno", VirtioCcwData, bus_id),
+ DEFINE_PROP_UINT32("max_ports", VirtioCcwData, serial.max_virtserial_ports,
+ 31),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+ k->init = virtio_ccw_serial_init;
+ k->exit = virtio_ccw_serial_exit;
+ dc->props = virtio_ccw_serial_properties;
+}
+
+static TypeInfo virtio_ccw_serial = {
+ .name = "virtio-serial-ccw",
+ .parent = TYPE_VIRTIO_CCW_DEVICE,
+ .instance_size = sizeof(VirtioCcwData),
+ .class_init = virtio_ccw_serial_class_init,
+};
+
+static Property virtio_ccw_balloon_properties[] = {
+ DEFINE_PROP_STRING("devno", VirtioCcwData, bus_id),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+ k->init = virtio_ccw_balloon_init;
+ k->exit = virtio_ccw_balloon_exit;
+ dc->props = virtio_ccw_balloon_properties;
+}
+
+static TypeInfo virtio_ccw_balloon = {
+ .name = "virtio-balloon-ccw",
+ .parent = TYPE_VIRTIO_CCW_DEVICE,
+ .instance_size = sizeof(VirtioCcwData),
+ .class_init = virtio_ccw_balloon_class_init,
+};
+
+static Property virtio_ccw_scsi_properties[] = {
+ DEFINE_PROP_STRING("devno", VirtioCcwData, bus_id),
+ DEFINE_VIRTIO_SCSI_PROPERTIES(VirtioCcwData, host_features, scsi),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+ k->init = virtio_ccw_scsi_init;
+ k->exit = virtio_ccw_scsi_exit;
+ dc->props = virtio_ccw_scsi_properties;
+}
+
+static TypeInfo virtio_ccw_scsi = {
+ .name = "virtio-scsi-ccw",
+ .parent = TYPE_VIRTIO_CCW_DEVICE,
+ .instance_size = sizeof(VirtioCcwData),
+ .class_init = virtio_ccw_scsi_class_init,
+};
+
+static int virtio_ccw_busdev_init(DeviceState *dev)
+{
+ VirtioCcwData *_dev = (VirtioCcwData *)dev;
+ VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
+
+ return _info->init(_dev);
+}
+
+static int virtio_ccw_busdev_exit(DeviceState *dev)
+{
+ VirtioCcwData *_dev = (VirtioCcwData *)dev;
+ VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
+
+ return _info->exit(_dev);
+}
+
+static int virtio_ccw_busdev_unplug(DeviceState *dev)
+{
+ VirtioCcwData *_dev = (VirtioCcwData *)dev;
+ SubchDev *sch = _dev->sch;
+
+ /*
+ * We should arrive here only for device_del, since we don't support
+ * direct hot(un)plug of channels, but only through virtio.
+ */
+ assert(sch != NULL);
+ /* Subchannel is now disabled and no longer valid. */
+ qemu_mutex_lock(&sch->mutex);
+ sch->curr_status.pmcw.ena = 0;
+ sch->curr_status.pmcw.dnv = 0;
+ qemu_mutex_unlock(&sch->mutex);
+
+ s390_sch_hotplug(sch->cssid, sch->ssid, sch->schid, sch->devno,
+ &sch->curr_status, 1, 0, 1);
+
+ object_unparent(OBJECT(dev));
+ qdev_free(dev);
+ return 0;
+}
+
+static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->init = virtio_ccw_busdev_init;
+ dc->exit = virtio_ccw_busdev_exit;
+ dc->unplug = virtio_ccw_busdev_unplug;
+ dc->bus_type = TYPE_VIRTIO_CCW_BUS;
+
+}
+
+static TypeInfo virtio_ccw_device_info = {
+ .name = TYPE_VIRTIO_CCW_DEVICE,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(VirtioCcwData),
+ .class_init = virtio_ccw_device_class_init,
+ .class_size = sizeof(VirtIOCCWDeviceClass),
+ .abstract = true,
+};
+
+/***************** Virtio-ccw Bus Bridge Device ********************/
+/* Only required to have the virtio bus as child in the system bus */
+
+static int virtio_ccw_bridge_init(SysBusDevice *dev)
+{
+ /* nothing */
+ return 0;
+}
+
+static void virtio_ccw_bridge_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = virtio_ccw_bridge_init;
+ dc->no_user = 1;
+}
+
+static TypeInfo virtio_ccw_bridge_info = {
+ .name = "virtio-ccw-bridge",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(SysBusDevice),
+ .class_init = virtio_ccw_bridge_class_init,
+};
+
+static void virtio_ccw_register(void)
+{
+ type_register_static(&virtio_ccw_bus_info);
+ type_register_static(&virtio_ccw_device_info);
+ type_register_static(&virtio_ccw_serial);
+ type_register_static(&virtio_ccw_blk);
+ type_register_static(&virtio_ccw_net);
+ type_register_static(&virtio_ccw_balloon);
+ type_register_static(&virtio_ccw_scsi);
+ type_register_static(&virtio_ccw_bridge_info);
+}
+type_init(virtio_ccw_register);
diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
new file mode 100644
index 0000000..ee198d6
--- /dev/null
+++ b/hw/s390x/virtio-ccw.h
@@ -0,0 +1,77 @@
+/*
+ * virtio ccw target definitions
+ *
+ * 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.
+ */
+
+#include <hw/virtio-blk.h>
+#include <hw/virtio-net.h>
+#include <hw/virtio-serial.h>
+#include <hw/virtio-scsi.h>
+
+#define VIRTUAL_CSSID 0xfe
+
+#define VIRTIO_CCW_CU_TYPE 0x3832
+#define VIRTIO_CCW_CHPID_TYPE 0x32
+
+#define CCW_CMD_SET_VQ 0x13
+#define CCW_CMD_VDEV_RESET 0x33
+#define CCW_CMD_READ_FEAT 0x12
+#define CCW_CMD_WRITE_FEAT 0x11
+#define CCW_CMD_READ_CONF 0x22
+#define CCW_CMD_WRITE_CONF 0x21
+#define CCW_CMD_WRITE_STATUS 0x31
+#define CCW_CMD_SET_IND 0x43
+#define CCW_CMD_READ_VQ_CONF 0x32
+
+#define TYPE_VIRTIO_CCW_DEVICE "virtio-ccw-device"
+#define VIRTIO_CCW_DEVICE(obj) \
+ OBJECT_CHECK(VirtioCcwData, (obj), TYPE_VIRTIO_CCW_DEVICE)
+#define VIRTIO_CCW_DEVICE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(VirtIOCCWDeviceClass, (klass), TYPE_VIRTIO_CCW_DEVICE)
+#define VIRTIO_CCW_DEVICE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(VirtIOCCWDeviceClass, (obj), TYPE_VIRTIO_CCW_DEVICE)
+
+#define TYPE_VIRTIO_CCW_BUS "virtio-ccw-bus"
+#define VIRTIO_CCW_BUS(obj) \
+ OBJECT_CHECK(VirtioCcwBus, (obj), TYPE_VIRTIO_CCW_BUS)
+
+typedef struct VirtioCcwData VirtioCcwData;
+
+typedef struct VirtIOCCWDeviceClass {
+ DeviceClass qdev;
+ int (*init)(VirtioCcwData *dev);
+ int (*exit)(VirtioCcwData *dev);
+} VirtIOCCWDeviceClass;
+
+struct VirtioCcwData {
+ DeviceState qdev;
+ SubchDev *sch;
+ VirtIODevice *vdev;
+ char *bus_id;
+ VirtIOBlkConf blk;
+ NICConf nic;
+ uint32_t host_features;
+ virtio_serial_conf serial;
+ virtio_net_conf net;
+ VirtIOSCSIConf scsi;
+ /* Guest provided values: */
+ target_phys_addr_t indicators;
+};
+
+/* virtio-ccw bus type */
+typedef struct VirtioCcwBus {
+ BusState bus;
+ VirtioCcwData *console;
+} VirtioCcwBus;
+
+VirtioCcwBus *virtio_ccw_bus_init(void);
+void virtio_ccw_device_update_status(SubchDev *sch);
+VirtioCcwData *virtio_ccw_bus_console(VirtioCcwBus *bus);
+VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch);
+void virtio_ccw_reset_subchannels(struct VirtioCcwBus *bus);
diff --git a/vl.c b/vl.c
index e71cb30..8d1f7f0 100644
--- a/vl.c
+++ b/vl.c
@@ -284,6 +284,7 @@ static struct {
{ .driver = "scsi-cd", .flag = &default_cdrom },
{ .driver = "virtio-serial-pci", .flag = &default_virtcon },
{ .driver = "virtio-serial-s390", .flag = &default_virtcon },
+ { .driver = "virtio-serial-ccw", .flag = &default_virtcon },
{ .driver = "virtio-serial", .flag = &default_virtcon },
{ .driver = "VGA", .flag = &default_vga },
{ .driver = "isa-vga", .flag = &default_vga },
--
1.7.11.4