hw/s390x/s390-virtio-ccw.c

   1 /*
   2  * virtio ccw machine
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "qapi/error.h"
  14 #include "hw/boards.h"
  15 #include "exec/address-spaces.h"
  16 #include "s390-virtio.h"
  17 #include "hw/s390x/sclp.h"
  18 #include "hw/s390x/s390_flic.h"
  19 #include "ioinst.h"
  20 #include "css.h"
  21 #include "virtio-ccw.h"
  22 #include "qemu/config-file.h"
  23 #include "s390-pci-bus.h"
  24 #include "hw/s390x/storage-keys.h"
  25 #include "hw/compat.h"
  26 #include "hw/s390x/s390-virtio-ccw.h"
  27
  28 static const char *const reset_dev_types[] = {
  29     "virtual-css-bridge",
  30     "s390-sclp-event-facility",
  31     "s390-flic",
  32     "diag288",
  33 };
  34
  35 void subsystem_reset(void)
  36 {
  37     DeviceState *dev;
  38     int i;
  39
  40     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
  41         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
  42         if (dev) {
  43             qdev_reset_all(dev);
  44         }
  45     }
  46 }
  47
  48 static int virtio_ccw_hcall_notify(const uint64_t *args)
  49 {
  50     uint64_t subch_id = args[0];
  51     uint64_t queue = args[1];
  52     SubchDev *sch;
  53     int cssid, ssid, schid, m;
  54
  55     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  56         return -EINVAL;
  57     }
  58     sch = css_find_subch(m, cssid, ssid, schid);
  59     if (!sch || !css_subch_visible(sch)) {
  60         return -EINVAL;
  61     }
  62     if (queue >= VIRTIO_CCW_QUEUE_MAX) {
  63         return -EINVAL;
  64     }
  65     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  66     return 0;
  67
  68 }
  69
  70 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  71 {
  72     uint64_t mem = args[0];
  73
  74     if (mem < ram_size) {
  75         /* Early printk */
  76         return 0;
  77     }
  78     return -EINVAL;
  79 }
  80
  81 static void virtio_ccw_register_hcalls(void)
  82 {
  83     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  84                                    virtio_ccw_hcall_notify);
  85     /* Tolerate early printk. */
  86     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
  87                                    virtio_ccw_hcall_early_printk);
  88 }
  89
  90 void s390_memory_init(ram_addr_t mem_size)
  91 {
  92     MemoryRegion *sysmem = get_system_memory();
  93     MemoryRegion *ram = g_new(MemoryRegion, 1);
  94
  95     /* allocate RAM for core */
  96     memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
  97     memory_region_add_subregion(sysmem, 0, ram);
  98
  99     /* Initialize storage key device */
 100     s390_skeys_init();
 101 }
 102
 103 static void ccw_init(MachineState *machine)
 104 {
 105     int ret;
 106     VirtualCssBus *css_bus;
 107     DeviceState *dev;
 108
 109     s390_sclp_init();
 110     s390_memory_init(machine->ram_size);
 111
 112     /* get a BUS */
 113     css_bus = virtual_css_bus_init();
 114     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 115                       machine->initrd_filename, "s390-ccw.img", true);
 116     s390_flic_init();
 117
 118     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 119     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 120                               OBJECT(dev), NULL);
 121     qdev_init_nofail(dev);
 122
 123     /* register hypercalls */
 124     virtio_ccw_register_hcalls();
 125
 126     /* init CPUs */
 127     s390_init_cpus(machine);
 128
 129     if (kvm_enabled()) {
 130         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 131     }
 132     /*
 133      * Create virtual css and set it as default so that non mcss-e
 134      * enabled guests only see virtio devices.
 135      */
 136     ret = css_create_css_image(VIRTUAL_CSSID, true);
 137     assert(ret == 0);
 138
 139     /* Create VirtIO network adapters */
 140     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 141
 142     /* Register savevm handler for guest TOD clock */
 143     register_savevm(NULL, "todclock", 0, 1,
 144                     gtod_save, gtod_load, kvm_state);
 145 }
 146
 147 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 148                         DeviceState *dev, Error **errp)
 149 {
 150     gchar *name;
 151     S390CPU *cpu = S390_CPU(dev);
 152     CPUState *cs = CPU(dev);
 153
 154     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 155     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 156                              errp);
 157     g_free(name);
 158 }
 159
 160 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 161                                      DeviceState *dev, Error **errp)
 162 {
 163     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 164         s390_cpu_plug(hotplug_dev, dev, errp);
 165     }
 166 }
 167
 168 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 169                                                 DeviceState *dev)
 170 {
 171     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 172         return HOTPLUG_HANDLER(machine);
 173     }
 174     return NULL;
 175 }
 176
 177 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 178 {
 179     MachineState *machine = MACHINE(qdev_get_machine());
 180     Error *err = NULL;
 181
 182     s390x_new_cpu(machine->cpu_model, id, &err);
 183     error_propagate(errp, err);
 184 }
 185
 186 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 187 {
 188     MachineClass *mc = MACHINE_CLASS(oc);
 189     NMIClass *nc = NMI_CLASS(oc);
 190     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 191
 192     mc->init = ccw_init;
 193     mc->reset = s390_machine_reset;
 194     mc->hot_add_cpu = s390_hot_add_cpu;
 195     mc->block_default_type = IF_VIRTIO;
 196     mc->no_cdrom = 1;
 197     mc->no_floppy = 1;
 198     mc->no_serial = 1;
 199     mc->no_parallel = 1;
 200     mc->no_sdcard = 1;
 201     mc->use_sclp = 1;
 202     mc->max_cpus = 255;
 203     mc->get_hotplug_handler = s390_get_hotplug_handler;
 204     hc->plug = s390_machine_device_plug;
 205     nc->nmi_monitor_handler = s390_nmi;
 206 }
 207
 208 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 209 {
 210     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 211
 212     return ms->aes_key_wrap;
 213 }
 214
 215 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 216                                             Error **errp)
 217 {
 218     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 219
 220     ms->aes_key_wrap = value;
 221 }
 222
 223 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 224 {
 225     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 226
 227     return ms->dea_key_wrap;
 228 }
 229
 230 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 231                                             Error **errp)
 232 {
 233     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 234
 235     ms->dea_key_wrap = value;
 236 }
 237
 238 static inline void s390_machine_initfn(Object *obj)
 239 {
 240     object_property_add_bool(obj, "aes-key-wrap",
 241                              machine_get_aes_key_wrap,
 242                              machine_set_aes_key_wrap, NULL);
 243     object_property_set_description(obj, "aes-key-wrap",
 244             "enable/disable AES key wrapping using the CPACF wrapping key",
 245             NULL);
 246     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 247
 248     object_property_add_bool(obj, "dea-key-wrap",
 249                              machine_get_dea_key_wrap,
 250                              machine_set_dea_key_wrap, NULL);
 251     object_property_set_description(obj, "dea-key-wrap",
 252             "enable/disable DEA key wrapping using the CPACF wrapping key",
 253             NULL);
 254     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 255 }
 256
 257 static const TypeInfo ccw_machine_info = {
 258     .name          = TYPE_S390_CCW_MACHINE,
 259     .parent        = TYPE_MACHINE,
 260     .abstract      = true,
 261     .instance_size = sizeof(S390CcwMachineState),
 262     .instance_init = s390_machine_initfn,
 263     .class_init    = ccw_machine_class_init,
 264     .interfaces = (InterfaceInfo[]) {
 265         { TYPE_NMI },
 266         { TYPE_HOTPLUG_HANDLER},
 267         { }
 268     },
 269 };
 270
 271 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 272     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 273                                                   void *data)                 \
 274     {                                                                         \
 275         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 276         ccw_machine_##suffix##_class_options(mc);                             \
 277         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 278         if (latest) {                                                         \
 279             mc->alias = "s390-ccw-virtio";                                    \
 280             mc->is_default = 1;                                               \
 281         }                                                                     \
 282     }                                                                         \
 283     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 284     {                                                                         \
 285         MachineState *machine = MACHINE(obj);                                 \
 286         ccw_machine_##suffix##_instance_options(machine);                     \
 287     }                                                                         \
 288     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 289         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 290         .parent = TYPE_S390_CCW_MACHINE,                                      \
 291         .class_init = ccw_machine_##suffix##_class_init,                      \
 292         .instance_init = ccw_machine_##suffix##_instance_init,                \
 293     };                                                                        \
 294     static void ccw_machine_register_##suffix(void)                           \
 295     {                                                                         \
 296         type_register_static(&ccw_machine_##suffix##_info);                   \
 297     }                                                                         \
 298     type_init(ccw_machine_register_##suffix)
 299
 300 #define CCW_COMPAT_2_5 \
 301         HW_COMPAT_2_5
 302
 303 #define CCW_COMPAT_2_4 \
 304         CCW_COMPAT_2_5 \
 305         HW_COMPAT_2_4 \
 306         {\
 307             .driver   = TYPE_S390_SKEYS,\
 308             .property = "migration-enabled",\
 309             .value    = "off",\
 310         },{\
 311             .driver   = "virtio-blk-ccw",\
 312             .property = "max_revision",\
 313             .value    = "0",\
 314         },{\
 315             .driver   = "virtio-balloon-ccw",\
 316             .property = "max_revision",\
 317             .value    = "0",\
 318         },{\
 319             .driver   = "virtio-serial-ccw",\
 320             .property = "max_revision",\
 321             .value    = "0",\
 322         },{\
 323             .driver   = "virtio-9p-ccw",\
 324             .property = "max_revision",\
 325             .value    = "0",\
 326         },{\
 327             .driver   = "virtio-rng-ccw",\
 328             .property = "max_revision",\
 329             .value    = "0",\
 330         },{\
 331             .driver   = "virtio-net-ccw",\
 332             .property = "max_revision",\
 333             .value    = "0",\
 334         },{\
 335             .driver   = "virtio-scsi-ccw",\
 336             .property = "max_revision",\
 337             .value    = "0",\
 338         },{\
 339             .driver   = "vhost-scsi-ccw",\
 340             .property = "max_revision",\
 341             .value    = "0",\
 342         },
 343
 344 static void ccw_machine_2_6_instance_options(MachineState *machine)
 345 {
 346 }
 347
 348 static void ccw_machine_2_6_class_options(MachineClass *mc)
 349 {
 350 }
 351 DEFINE_CCW_MACHINE(2_6, "2.6", true);
 352
 353 static void ccw_machine_2_5_instance_options(MachineState *machine)
 354 {
 355 }
 356
 357 static void ccw_machine_2_5_class_options(MachineClass *mc)
 358 {
 359     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 360 }
 361 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 362
 363 static void ccw_machine_2_4_instance_options(MachineState *machine)
 364 {
 365     ccw_machine_2_5_instance_options(machine);
 366 }
 367
 368 static void ccw_machine_2_4_class_options(MachineClass *mc)
 369 {
 370     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 371 }
 372 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 373
 374 static void ccw_machine_register_types(void)
 375 {
 376     type_register_static(&ccw_machine_info);
 377 }
 378
 379 type_init(ccw_machine_register_types)