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 "hw/boards.h"
  13 #include "exec/address-spaces.h"
  14 #include "s390-virtio.h"
  15 #include "hw/s390x/sclp.h"
  16 #include "hw/s390x/s390_flic.h"
  17 #include "ioinst.h"
  18 #include "css.h"
  19 #include "virtio-ccw.h"
  20 #include "qemu/config-file.h"
  21 #include "s390-pci-bus.h"
  22 #include "hw/s390x/storage-keys.h"
  23
  24 #define TYPE_S390_CCW_MACHINE               "s390-ccw-machine"
  25
  26 #define S390_CCW_MACHINE(obj) \
  27     OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE)
  28
  29 typedef struct S390CcwMachineState {
  30     /*< private >*/
  31     MachineState parent_obj;
  32
  33     /*< public >*/
  34     bool aes_key_wrap;
  35     bool dea_key_wrap;
  36 } S390CcwMachineState;
  37
  38 void io_subsystem_reset(void)
  39 {
  40     DeviceState *css, *sclp, *flic, *diag288;
  41
  42     css = DEVICE(object_resolve_path_type("", "virtual-css-bridge", NULL));
  43     if (css) {
  44         qdev_reset_all(css);
  45     }
  46     sclp = DEVICE(object_resolve_path_type("",
  47                   "s390-sclp-event-facility", NULL));
  48     if (sclp) {
  49         qdev_reset_all(sclp);
  50     }
  51     flic = DEVICE(object_resolve_path_type("", "s390-flic", NULL));
  52     if (flic) {
  53         qdev_reset_all(flic);
  54     }
  55     diag288 = DEVICE(object_resolve_path_type("", "diag288", NULL));
  56     if (diag288) {
  57         qdev_reset_all(diag288);
  58     }
  59 }
  60
  61 static int virtio_ccw_hcall_notify(const uint64_t *args)
  62 {
  63     uint64_t subch_id = args[0];
  64     uint64_t queue = args[1];
  65     SubchDev *sch;
  66     int cssid, ssid, schid, m;
  67
  68     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  69         return -EINVAL;
  70     }
  71     sch = css_find_subch(m, cssid, ssid, schid);
  72     if (!sch || !css_subch_visible(sch)) {
  73         return -EINVAL;
  74     }
  75     if (queue >= VIRTIO_CCW_QUEUE_MAX) {
  76         return -EINVAL;
  77     }
  78     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  79     return 0;
  80
  81 }
  82
  83 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  84 {
  85     uint64_t mem = args[0];
  86
  87     if (mem < ram_size) {
  88         /* Early printk */
  89         return 0;
  90     }
  91     return -EINVAL;
  92 }
  93
  94 static void virtio_ccw_register_hcalls(void)
  95 {
  96     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  97                                    virtio_ccw_hcall_notify);
  98     /* Tolerate early printk. */
  99     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
 100                                    virtio_ccw_hcall_early_printk);
 101 }
 102
 103 void s390_memory_init(ram_addr_t mem_size)
 104 {
 105     MemoryRegion *sysmem = get_system_memory();
 106     MemoryRegion *ram = g_new(MemoryRegion, 1);
 107
 108     /* allocate RAM for core */
 109     memory_region_init_ram(ram, NULL, "s390.ram", mem_size, &error_fatal);
 110     vmstate_register_ram_global(ram);
 111     memory_region_add_subregion(sysmem, 0, ram);
 112
 113     /* Initialize storage key device */
 114     s390_skeys_init();
 115 }
 116
 117 static void ccw_init(MachineState *machine)
 118 {
 119     int ret;
 120     VirtualCssBus *css_bus;
 121     DeviceState *dev;
 122
 123     s390_sclp_init();
 124     s390_memory_init(machine->ram_size);
 125
 126     /* get a BUS */
 127     css_bus = virtual_css_bus_init();
 128     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 129                       machine->initrd_filename, "s390-ccw.img", true);
 130     s390_flic_init();
 131
 132     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 133     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 134                               OBJECT(dev), NULL);
 135     qdev_init_nofail(dev);
 136
 137     /* register hypercalls */
 138     virtio_ccw_register_hcalls();
 139
 140     /* init CPUs */
 141     s390_init_cpus(machine->cpu_model);
 142
 143     if (kvm_enabled()) {
 144         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 145     }
 146     /*
 147      * Create virtual css and set it as default so that non mcss-e
 148      * enabled guests only see virtio devices.
 149      */
 150     ret = css_create_css_image(VIRTUAL_CSSID, true);
 151     assert(ret == 0);
 152
 153     /* Create VirtIO network adapters */
 154     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 155
 156     /* Register savevm handler for guest TOD clock */
 157     register_savevm(NULL, "todclock", 0, 1,
 158                     gtod_save, gtod_load, kvm_state);
 159 }
 160
 161 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 162 {
 163     MachineClass *mc = MACHINE_CLASS(oc);
 164     NMIClass *nc = NMI_CLASS(oc);
 165
 166     mc->init = ccw_init;
 167     mc->block_default_type = IF_VIRTIO;
 168     mc->no_cdrom = 1;
 169     mc->no_floppy = 1;
 170     mc->no_serial = 1;
 171     mc->no_parallel = 1;
 172     mc->no_sdcard = 1;
 173     mc->use_sclp = 1;
 174     mc->max_cpus = 255;
 175     nc->nmi_monitor_handler = s390_nmi;
 176 }
 177
 178 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 179 {
 180     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 181
 182     return ms->aes_key_wrap;
 183 }
 184
 185 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 186                                             Error **errp)
 187 {
 188     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 189
 190     ms->aes_key_wrap = value;
 191 }
 192
 193 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 194 {
 195     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 196
 197     return ms->dea_key_wrap;
 198 }
 199
 200 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 201                                             Error **errp)
 202 {
 203     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 204
 205     ms->dea_key_wrap = value;
 206 }
 207
 208 static inline void s390_machine_initfn(Object *obj)
 209 {
 210     object_property_add_bool(obj, "aes-key-wrap",
 211                              machine_get_aes_key_wrap,
 212                              machine_set_aes_key_wrap, NULL);
 213     object_property_set_description(obj, "aes-key-wrap",
 214             "enable/disable AES key wrapping using the CPACF wrapping key",
 215             NULL);
 216     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 217
 218     object_property_add_bool(obj, "dea-key-wrap",
 219                              machine_get_dea_key_wrap,
 220                              machine_set_dea_key_wrap, NULL);
 221     object_property_set_description(obj, "dea-key-wrap",
 222             "enable/disable DEA key wrapping using the CPACF wrapping key",
 223             NULL);
 224     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 225 }
 226
 227 static const TypeInfo ccw_machine_info = {
 228     .name          = TYPE_S390_CCW_MACHINE,
 229     .parent        = TYPE_MACHINE,
 230     .abstract      = true,
 231     .instance_size = sizeof(S390CcwMachineState),
 232     .instance_init = s390_machine_initfn,
 233     .class_init    = ccw_machine_class_init,
 234     .interfaces = (InterfaceInfo[]) {
 235         { TYPE_NMI },
 236         { }
 237     },
 238 };
 239
 240 #define CCW_COMPAT_2_4 \
 241         {\
 242             .driver   = TYPE_S390_SKEYS,\
 243             .property = "migration-enabled",\
 244             .value    = "off",\
 245         },
 246
 247 static void ccw_machine_2_4_class_init(ObjectClass *oc, void *data)
 248 {
 249     MachineClass *mc = MACHINE_CLASS(oc);
 250     static GlobalProperty compat_props[] = {
 251         CCW_COMPAT_2_4
 252         { /* end of list */ }
 253     };
 254
 255     mc->name = "s390-ccw-virtio-2.4";
 256     mc->desc = "VirtIO-ccw based S390 machine v2.4";
 257     mc->compat_props = compat_props;
 258 }
 259
 260 static const TypeInfo ccw_machine_2_4_info = {
 261     .name          = MACHINE_TYPE_NAME("s390-ccw-virtio-2.4"),
 262     .parent        = TYPE_S390_CCW_MACHINE,
 263     .class_init    = ccw_machine_2_4_class_init,
 264 };
 265
 266 static void ccw_machine_2_5_class_init(ObjectClass *oc, void *data)
 267 {
 268     MachineClass *mc = MACHINE_CLASS(oc);
 269
 270     mc->name = "s390-ccw-virtio-2.5";
 271     mc->alias = "s390-ccw-virtio";
 272     mc->desc = "VirtIO-ccw based S390 machine v2.5";
 273     mc->is_default = 1;
 274 }
 275
 276 static const TypeInfo ccw_machine_2_5_info = {
 277     .name          = MACHINE_TYPE_NAME("s390-ccw-virtio-2.5"),
 278     .parent        = TYPE_S390_CCW_MACHINE,
 279     .class_init    = ccw_machine_2_5_class_init,
 280 };
 281
 282 static void ccw_machine_register_types(void)
 283 {
 284     type_register_static(&ccw_machine_info);
 285     type_register_static(&ccw_machine_2_4_info);
 286     type_register_static(&ccw_machine_2_5_info);
 287 }
 288
 289 type_init(ccw_machine_register_types)