qemu/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 "qemu-common.h"
  15 #include "cpu.h"
  16 #include "hw/boards.h"
  17 #include "exec/address-spaces.h"
  18 #include "s390-virtio.h"
  19 #include "hw/s390x/sclp.h"
  20 #include "hw/s390x/s390_flic.h"
  21 #include "ioinst.h"
  22 #include "css.h"
  23 #include "virtio-ccw.h"
  24 #include "qemu/config-file.h"
  25 #include "s390-pci-bus.h"
  26 #include "hw/s390x/storage-keys.h"
  27 #include "hw/compat.h"
  28 #include "hw/s390x/s390-virtio-ccw.h"
  29
  30 static const char *const reset_dev_types[] = {
  31     "virtual-css-bridge",
  32     "s390-sclp-event-facility",
  33     "s390-flic",
  34     "diag288",
  35 };
  36
  37 void subsystem_reset(void)
  38 {
  39     DeviceState *dev;
  40     int i;
  41
  42     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
  43         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
  44         if (dev) {
  45             qdev_reset_all(dev);
  46         }
  47     }
  48 }
  49
  50 static int virtio_ccw_hcall_notify(const uint64_t *args)
  51 {
  52     uint64_t subch_id = args[0];
  53     uint64_t queue = args[1];
  54     SubchDev *sch;
  55     int cssid, ssid, schid, m;
  56
  57     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  58         return -EINVAL;
  59     }
  60     sch = css_find_subch(m, cssid, ssid, schid);
  61     if (!sch || !css_subch_visible(sch)) {
  62         return -EINVAL;
  63     }
  64     if (queue >= VIRTIO_CCW_QUEUE_MAX) {
  65         return -EINVAL;
  66     }
  67     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  68     return 0;
  69
  70 }
  71
  72 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  73 {
  74     uint64_t mem = args[0];
  75
  76     if (mem < ram_size) {
  77         /* Early printk */
  78         return 0;
  79     }
  80     return -EINVAL;
  81 }
  82
  83 static void virtio_ccw_register_hcalls(void)
  84 {
  85     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  86                                    virtio_ccw_hcall_notify);
  87     /* Tolerate early printk. */
  88     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
  89                                    virtio_ccw_hcall_early_printk);
  90 }
  91
  92 void s390_memory_init(ram_addr_t mem_size)
  93 {
  94     MemoryRegion *sysmem = get_system_memory();
  95     MemoryRegion *ram = g_new(MemoryRegion, 1);
  96
  97     /* allocate RAM for core */
  98     memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
  99     memory_region_add_subregion(sysmem, 0, ram);
 100
 101     /* Initialize storage key device */
 102     s390_skeys_init();
 103 }
 104
 105 static void ccw_init(MachineState *machine)
 106 {
 107     int ret;
 108     VirtualCssBus *css_bus;
 109     DeviceState *dev;
 110
 111     s390_sclp_init();
 112     s390_memory_init(machine->ram_size);
 113
 114     /* get a BUS */
 115     css_bus = virtual_css_bus_init();
 116     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 117                       machine->initrd_filename, "s390-ccw.img", true);
 118     s390_flic_init();
 119
 120     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 121     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 122                               OBJECT(dev), NULL);
 123     qdev_init_nofail(dev);
 124
 125     /* register hypercalls */
 126     virtio_ccw_register_hcalls();
 127
 128     /* init CPUs */
 129     s390_init_cpus(machine);
 130
 131     if (kvm_enabled()) {
 132         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 133     }
 134     /*
 135      * Create virtual css and set it as default so that non mcss-e
 136      * enabled guests only see virtio devices.
 137      */
 138     ret = css_create_css_image(VIRTUAL_CSSID, true);
 139     assert(ret == 0);
 140
 141     /* Create VirtIO network adapters */
 142     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 143
 144     /* Register savevm handler for guest TOD clock */
 145     register_savevm(NULL, "todclock", 0, 1,
 146                     gtod_save, gtod_load, kvm_state);
 147 }
 148
 149 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 150                         DeviceState *dev, Error **errp)
 151 {
 152     gchar *name;
 153     S390CPU *cpu = S390_CPU(dev);
 154     CPUState *cs = CPU(dev);
 155
 156     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 157     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 158                              errp);
 159     g_free(name);
 160 }
 161
 162 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 163                                      DeviceState *dev, Error **errp)
 164 {
 165     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 166         s390_cpu_plug(hotplug_dev, dev, errp);
 167     }
 168 }
 169
 170 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 171                                                 DeviceState *dev)
 172 {
 173     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 174         return HOTPLUG_HANDLER(machine);
 175     }
 176     return NULL;
 177 }
 178
 179 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 180 {
 181     MachineState *machine = MACHINE(qdev_get_machine());
 182     Error *err = NULL;
 183
 184     s390x_new_cpu(machine->cpu_model, id, &err);
 185     error_propagate(errp, err);
 186 }
 187
 188 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 189 {
 190     MachineClass *mc = MACHINE_CLASS(oc);
 191     NMIClass *nc = NMI_CLASS(oc);
 192     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 193
 194     mc->init = ccw_init;
 195     mc->reset = s390_machine_reset;
 196     mc->hot_add_cpu = s390_hot_add_cpu;
 197     mc->block_default_type = IF_VIRTIO;
 198     mc->no_cdrom = 1;
 199     mc->no_floppy = 1;
 200     mc->no_serial = 1;
 201     mc->no_parallel = 1;
 202     mc->no_sdcard = 1;
 203     mc->use_sclp = 1;
 204     mc->max_cpus = 255;
 205     mc->get_hotplug_handler = s390_get_hotplug_handler;
 206     hc->plug = s390_machine_device_plug;
 207     nc->nmi_monitor_handler = s390_nmi;
 208 }
 209
 210 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 211 {
 212     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 213
 214     return ms->aes_key_wrap;
 215 }
 216
 217 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 218                                             Error **errp)
 219 {
 220     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 221
 222     ms->aes_key_wrap = value;
 223 }
 224
 225 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 226 {
 227     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 228
 229     return ms->dea_key_wrap;
 230 }
 231
 232 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 233                                             Error **errp)
 234 {
 235     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 236
 237     ms->dea_key_wrap = value;
 238 }
 239
 240 static inline void s390_machine_initfn(Object *obj)
 241 {
 242     object_property_add_bool(obj, "aes-key-wrap",
 243                              machine_get_aes_key_wrap,
 244                              machine_set_aes_key_wrap, NULL);
 245     object_property_set_description(obj, "aes-key-wrap",
 246             "enable/disable AES key wrapping using the CPACF wrapping key",
 247             NULL);
 248     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 249
 250     object_property_add_bool(obj, "dea-key-wrap",
 251                              machine_get_dea_key_wrap,
 252                              machine_set_dea_key_wrap, NULL);
 253     object_property_set_description(obj, "dea-key-wrap",
 254             "enable/disable DEA key wrapping using the CPACF wrapping key",
 255             NULL);
 256     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 257 }
 258
 259 static const TypeInfo ccw_machine_info = {
 260     .name          = TYPE_S390_CCW_MACHINE,
 261     .parent        = TYPE_MACHINE,
 262     .abstract      = true,
 263     .instance_size = sizeof(S390CcwMachineState),
 264     .instance_init = s390_machine_initfn,
 265     .class_init    = ccw_machine_class_init,
 266     .interfaces = (InterfaceInfo[]) {
 267         { TYPE_NMI },
 268         { TYPE_HOTPLUG_HANDLER},
 269         { }
 270     },
 271 };
 272
 273 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 274     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 275                                                   void *data)                 \
 276     {                                                                         \
 277         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 278         ccw_machine_##suffix##_class_options(mc);                             \
 279         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 280         if (latest) {                                                         \
 281             mc->alias = "s390-ccw-virtio";                                    \
 282             mc->is_default = 1;                                               \
 283         }                                                                     \
 284     }                                                                         \
 285     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 286     {                                                                         \
 287         MachineState *machine = MACHINE(obj);                                 \
 288         ccw_machine_##suffix##_instance_options(machine);                     \
 289     }                                                                         \
 290     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 291         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 292         .parent = TYPE_S390_CCW_MACHINE,                                      \
 293         .class_init = ccw_machine_##suffix##_class_init,                      \
 294         .instance_init = ccw_machine_##suffix##_instance_init,                \
 295     };                                                                        \
 296     static void ccw_machine_register_##suffix(void)                           \
 297     {                                                                         \
 298         type_register_static(&ccw_machine_##suffix##_info);                   \
 299     }                                                                         \
 300     type_init(ccw_machine_register_##suffix)
 301
 302 #define CCW_COMPAT_2_5 \
 303         HW_COMPAT_2_5
 304
 305 #define CCW_COMPAT_2_4 \
 306         CCW_COMPAT_2_5 \
 307         HW_COMPAT_2_4 \
 308         {\
 309             .driver   = TYPE_S390_SKEYS,\
 310             .property = "migration-enabled",\
 311             .value    = "off",\
 312         },{\
 313             .driver   = "virtio-blk-ccw",\
 314             .property = "max_revision",\
 315             .value    = "0",\
 316         },{\
 317             .driver   = "virtio-balloon-ccw",\
 318             .property = "max_revision",\
 319             .value    = "0",\
 320         },{\
 321             .driver   = "virtio-serial-ccw",\
 322             .property = "max_revision",\
 323             .value    = "0",\
 324         },{\
 325             .driver   = "virtio-9p-ccw",\
 326             .property = "max_revision",\
 327             .value    = "0",\
 328         },{\
 329             .driver   = "virtio-rng-ccw",\
 330             .property = "max_revision",\
 331             .value    = "0",\
 332         },{\
 333             .driver   = "virtio-net-ccw",\
 334             .property = "max_revision",\
 335             .value    = "0",\
 336         },{\
 337             .driver   = "virtio-scsi-ccw",\
 338             .property = "max_revision",\
 339             .value    = "0",\
 340         },{\
 341             .driver   = "vhost-scsi-ccw",\
 342             .property = "max_revision",\
 343             .value    = "0",\
 344         },
 345
 346 static void ccw_machine_2_6_instance_options(MachineState *machine)
 347 {
 348 }
 349
 350 static void ccw_machine_2_6_class_options(MachineClass *mc)
 351 {
 352 }
 353 DEFINE_CCW_MACHINE(2_6, "2.6", true);
 354
 355 static void ccw_machine_2_5_instance_options(MachineState *machine)
 356 {
 357 }
 358
 359 static void ccw_machine_2_5_class_options(MachineClass *mc)
 360 {
 361     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 362 }
 363 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 364
 365 static void ccw_machine_2_4_instance_options(MachineState *machine)
 366 {
 367     ccw_machine_2_5_instance_options(machine);
 368 }
 369
 370 static void ccw_machine_2_4_class_options(MachineClass *mc)
 371 {
 372     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 373 }
 374 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 375
 376 static void ccw_machine_register_types(void)
 377 {
 378     type_register_static(&ccw_machine_info);
 379 }
 380
 381 type_init(ccw_machine_register_types)