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 23 #define TYPE_S390_CCW_MACHINE "s390-ccw-machine" 24 25 #define S390_CCW_MACHINE(obj) \ 26 OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE) 27 28 typedef struct S390CcwMachineState { 29 /*< private >*/ 30 MachineState parent_obj; 31 32 /*< public >*/ 33 bool aes_key_wrap; 34 bool dea_key_wrap; 35 } S390CcwMachineState; 36 37 void io_subsystem_reset(void) 38 { 39 DeviceState *css, *sclp, *flic; 40 41 css = DEVICE(object_resolve_path_type("", "virtual-css-bridge", NULL)); 42 if (css) { 43 qdev_reset_all(css); 44 } 45 sclp = DEVICE(object_resolve_path_type("", 46 "s390-sclp-event-facility", NULL)); 47 if (sclp) { 48 qdev_reset_all(sclp); 49 } 50 flic = DEVICE(object_resolve_path_type("", "s390-flic", NULL)); 51 if (flic) { 52 qdev_reset_all(flic); 53 } 54 } 55 56 static int virtio_ccw_hcall_notify(const uint64_t *args) 57 { 58 uint64_t subch_id = args[0]; 59 uint64_t queue = args[1]; 60 SubchDev *sch; 61 int cssid, ssid, schid, m; 62 63 if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) { 64 return -EINVAL; 65 } 66 sch = css_find_subch(m, cssid, ssid, schid); 67 if (!sch || !css_subch_visible(sch)) { 68 return -EINVAL; 69 } 70 if (queue >= VIRTIO_CCW_QUEUE_MAX) { 71 return -EINVAL; 72 } 73 virtio_queue_notify(virtio_ccw_get_vdev(sch), queue); 74 return 0; 75 76 } 77 78 static int virtio_ccw_hcall_early_printk(const uint64_t *args) 79 { 80 uint64_t mem = args[0]; 81 82 if (mem < ram_size) { 83 /* Early printk */ 84 return 0; 85 } 86 return -EINVAL; 87 } 88 89 static void virtio_ccw_register_hcalls(void) 90 { 91 s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY, 92 virtio_ccw_hcall_notify); 93 /* Tolerate early printk. */ 94 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY, 95 virtio_ccw_hcall_early_printk); 96 } 97 98 static void ccw_init(MachineState *machine) 99 { 100 ram_addr_t my_ram_size = machine->ram_size; 101 MemoryRegion *sysmem = get_system_memory(); 102 MemoryRegion *ram = g_new(MemoryRegion, 1); 103 sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev(); 104 uint8_t *storage_keys; 105 int ret; 106 VirtualCssBus *css_bus; 107 DeviceState *dev; 108 QemuOpts *opts = qemu_opts_find(qemu_find_opts("memory"), NULL); 109 ram_addr_t pad_size = 0; 110 ram_addr_t maxmem = qemu_opt_get_size(opts, "maxmem", my_ram_size); 111 ram_addr_t standby_mem_size = maxmem - my_ram_size; 112 uint64_t kvm_limit; 113 114 /* The storage increment size is a multiple of 1M and is a power of 2. 115 * The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer. 116 * The variable 'mhd->increment_size' is an exponent of 2 that can be 117 * used to calculate the size (in bytes) of an increment. */ 118 mhd->increment_size = 20; 119 while ((my_ram_size >> mhd->increment_size) > MAX_STORAGE_INCREMENTS) { 120 mhd->increment_size++; 121 } 122 while ((standby_mem_size >> mhd->increment_size) > MAX_STORAGE_INCREMENTS) { 123 mhd->increment_size++; 124 } 125 126 /* The core and standby memory areas need to be aligned with 127 * the increment size. In effect, this can cause the 128 * user-specified memory size to be rounded down to align 129 * with the nearest increment boundary. */ 130 standby_mem_size = standby_mem_size >> mhd->increment_size 131 << mhd->increment_size; 132 my_ram_size = my_ram_size >> mhd->increment_size 133 << mhd->increment_size; 134 135 /* let's propagate the changed ram size into the global variable. */ 136 ram_size = my_ram_size; 137 machine->maxram_size = my_ram_size + standby_mem_size; 138 139 ret = s390_set_memory_limit(machine->maxram_size, &kvm_limit); 140 if (ret == -E2BIG) { 141 hw_error("qemu: host supports a maximum of %" PRIu64 " GB", 142 kvm_limit >> 30); 143 } else if (ret) { 144 hw_error("qemu: setting the guest size failed"); 145 } 146 147 /* get a BUS */ 148 css_bus = virtual_css_bus_init(); 149 s390_sclp_init(); 150 s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline, 151 machine->initrd_filename, "s390-ccw.img", true); 152 s390_flic_init(); 153 154 dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE); 155 object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE, 156 OBJECT(dev), NULL); 157 qdev_init_nofail(dev); 158 159 /* register hypercalls */ 160 virtio_ccw_register_hcalls(); 161 162 /* allocate RAM for core */ 163 memory_region_init_ram(ram, NULL, "s390.ram", my_ram_size, &error_abort); 164 vmstate_register_ram_global(ram); 165 memory_region_add_subregion(sysmem, 0, ram); 166 167 /* If the size of ram is not on a MEM_SECTION_SIZE boundary, 168 calculate the pad size necessary to force this boundary. */ 169 if (standby_mem_size) { 170 if (my_ram_size % MEM_SECTION_SIZE) { 171 pad_size = MEM_SECTION_SIZE - my_ram_size % MEM_SECTION_SIZE; 172 } 173 my_ram_size += standby_mem_size + pad_size; 174 mhd->pad_size = pad_size; 175 mhd->standby_mem_size = standby_mem_size; 176 } 177 178 /* allocate storage keys */ 179 storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE); 180 181 /* init CPUs */ 182 s390_init_cpus(machine->cpu_model, storage_keys); 183 184 if (kvm_enabled()) { 185 kvm_s390_enable_css_support(s390_cpu_addr2state(0)); 186 } 187 /* 188 * Create virtual css and set it as default so that non mcss-e 189 * enabled guests only see virtio devices. 190 */ 191 ret = css_create_css_image(VIRTUAL_CSSID, true); 192 assert(ret == 0); 193 194 /* Create VirtIO network adapters */ 195 s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw"); 196 197 /* Register savevm handler for guest TOD clock */ 198 register_savevm(NULL, "todclock", 0, 1, 199 gtod_save, gtod_load, kvm_state); 200 } 201 202 static void ccw_machine_class_init(ObjectClass *oc, void *data) 203 { 204 MachineClass *mc = MACHINE_CLASS(oc); 205 NMIClass *nc = NMI_CLASS(oc); 206 207 mc->name = "s390-ccw-virtio"; 208 mc->alias = "s390-ccw"; 209 mc->desc = "VirtIO-ccw based S390 machine"; 210 mc->init = ccw_init; 211 mc->block_default_type = IF_VIRTIO; 212 mc->no_cdrom = 1; 213 mc->no_floppy = 1; 214 mc->no_serial = 1; 215 mc->no_parallel = 1; 216 mc->no_sdcard = 1; 217 mc->use_sclp = 1; 218 mc->max_cpus = 255; 219 mc->is_default = 1; 220 nc->nmi_monitor_handler = s390_nmi; 221 } 222 223 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp) 224 { 225 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 226 227 return ms->aes_key_wrap; 228 } 229 230 static inline void machine_set_aes_key_wrap(Object *obj, bool value, 231 Error **errp) 232 { 233 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 234 235 ms->aes_key_wrap = value; 236 } 237 238 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp) 239 { 240 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 241 242 return ms->dea_key_wrap; 243 } 244 245 static inline void machine_set_dea_key_wrap(Object *obj, bool value, 246 Error **errp) 247 { 248 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 249 250 ms->dea_key_wrap = value; 251 } 252 253 static inline void s390_machine_initfn(Object *obj) 254 { 255 object_property_add_bool(obj, "aes-key-wrap", 256 machine_get_aes_key_wrap, 257 machine_set_aes_key_wrap, NULL); 258 object_property_set_description(obj, "aes-key-wrap", 259 "enable/disable AES key wrapping using the CPACF wrapping key", 260 NULL); 261 object_property_set_bool(obj, true, "aes-key-wrap", NULL); 262 263 object_property_add_bool(obj, "dea-key-wrap", 264 machine_get_dea_key_wrap, 265 machine_set_dea_key_wrap, NULL); 266 object_property_set_description(obj, "dea-key-wrap", 267 "enable/disable DEA key wrapping using the CPACF wrapping key", 268 NULL); 269 object_property_set_bool(obj, true, "dea-key-wrap", NULL); 270 } 271 272 static const TypeInfo ccw_machine_info = { 273 .name = TYPE_S390_CCW_MACHINE, 274 .parent = TYPE_MACHINE, 275 .instance_size = sizeof(S390CcwMachineState), 276 .instance_init = s390_machine_initfn, 277 .class_init = ccw_machine_class_init, 278 .interfaces = (InterfaceInfo[]) { 279 { TYPE_NMI }, 280 { } 281 }, 282 }; 283 284 static void ccw_machine_register_types(void) 285 { 286 type_register_static(&ccw_machine_info); 287 } 288 289 type_init(ccw_machine_register_types) 290