1 /* 2 * sPAPR CPU core device, acts as container of CPU thread devices. 3 * 4 * Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com> 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 #include "hw/cpu/core.h" 10 #include "hw/ppc/spapr_cpu_core.h" 11 #include "target/ppc/cpu.h" 12 #include "hw/ppc/spapr.h" 13 #include "hw/boards.h" 14 #include "qapi/error.h" 15 #include "sysemu/cpus.h" 16 #include "sysemu/kvm.h" 17 #include "target/ppc/kvm_ppc.h" 18 #include "hw/ppc/ppc.h" 19 #include "target/ppc/mmu-hash64.h" 20 #include "sysemu/numa.h" 21 #include "qemu/error-report.h" 22 23 void spapr_cpu_parse_features(sPAPRMachineState *spapr) 24 { 25 /* 26 * Backwards compatibility hack: 27 * 28 * CPUs had a "compat=" property which didn't make sense for 29 * anything except pseries. It was replaced by "max-cpu-compat" 30 * machine option. This supports old command lines like 31 * -cpu POWER8,compat=power7 32 * By stripping the compat option and applying it to the machine 33 * before passing it on to the cpu level parser. 34 */ 35 gchar **inpieces; 36 int i, j; 37 gchar *compat_str = NULL; 38 39 inpieces = g_strsplit(MACHINE(spapr)->cpu_model, ",", 0); 40 41 /* inpieces[0] is the actual model string */ 42 i = 1; 43 j = 1; 44 while (inpieces[i]) { 45 if (g_str_has_prefix(inpieces[i], "compat=")) { 46 /* in case of multiple compat= options */ 47 g_free(compat_str); 48 compat_str = inpieces[i]; 49 } else { 50 j++; 51 } 52 53 i++; 54 /* Excise compat options from list */ 55 inpieces[j] = inpieces[i]; 56 } 57 58 if (compat_str) { 59 char *val = compat_str + strlen("compat="); 60 gchar *newprops = g_strjoinv(",", inpieces); 61 62 object_property_set_str(OBJECT(spapr), val, "max-cpu-compat", 63 &error_fatal); 64 65 ppc_cpu_parse_features(newprops); 66 g_free(newprops); 67 } else { 68 ppc_cpu_parse_features(MACHINE(spapr)->cpu_model); 69 } 70 71 g_strfreev(inpieces); 72 } 73 74 static void spapr_cpu_reset(void *opaque) 75 { 76 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); 77 PowerPCCPU *cpu = opaque; 78 CPUState *cs = CPU(cpu); 79 CPUPPCState *env = &cpu->env; 80 81 cpu_reset(cs); 82 83 /* All CPUs start halted. CPU0 is unhalted from the machine level 84 * reset code and the rest are explicitly started up by the guest 85 * using an RTAS call */ 86 cs->halted = 1; 87 88 env->spr[SPR_HIOR] = 0; 89 90 /* 91 * This is a hack for the benefit of KVM PR - it abuses the SDR1 92 * slot in kvm_sregs to communicate the userspace address of the 93 * HPT 94 */ 95 if (kvm_enabled()) { 96 env->spr[SPR_SDR1] = (target_ulong)(uintptr_t)spapr->htab 97 | (spapr->htab_shift - 18); 98 if (kvmppc_put_books_sregs(cpu) < 0) { 99 error_report("Unable to update SDR1 in KVM"); 100 exit(1); 101 } 102 } 103 } 104 105 static void spapr_cpu_destroy(PowerPCCPU *cpu) 106 { 107 qemu_unregister_reset(spapr_cpu_reset, cpu); 108 } 109 110 static void spapr_cpu_init(sPAPRMachineState *spapr, PowerPCCPU *cpu, 111 Error **errp) 112 { 113 CPUPPCState *env = &cpu->env; 114 115 /* Set time-base frequency to 512 MHz */ 116 cpu_ppc_tb_init(env, SPAPR_TIMEBASE_FREQ); 117 118 /* Enable PAPR mode in TCG or KVM */ 119 cpu_ppc_set_papr(cpu, PPC_VIRTUAL_HYPERVISOR(spapr)); 120 121 qemu_register_reset(spapr_cpu_reset, cpu); 122 spapr_cpu_reset(cpu); 123 } 124 125 /* 126 * Return the sPAPR CPU core type for @model which essentially is the CPU 127 * model specified with -cpu cmdline option. 128 */ 129 char *spapr_get_cpu_core_type(const char *model) 130 { 131 char *core_type; 132 gchar **model_pieces = g_strsplit(model, ",", 2); 133 gchar *cpu_model = g_ascii_strdown(model_pieces[0], -1); 134 g_strfreev(model_pieces); 135 136 core_type = g_strdup_printf("%s-" TYPE_SPAPR_CPU_CORE, cpu_model); 137 138 /* Check whether it exists or whether we have to look up an alias name */ 139 if (!object_class_by_name(core_type)) { 140 const char *realmodel; 141 142 g_free(core_type); 143 core_type = NULL; 144 realmodel = ppc_cpu_lookup_alias(cpu_model); 145 if (realmodel) { 146 core_type = spapr_get_cpu_core_type(realmodel); 147 } 148 } 149 g_free(cpu_model); 150 151 return core_type; 152 } 153 154 static void spapr_cpu_core_unrealizefn(DeviceState *dev, Error **errp) 155 { 156 sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev)); 157 sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev)); 158 const char *typename = object_class_get_name(scc->cpu_class); 159 size_t size = object_type_get_instance_size(typename); 160 CPUCore *cc = CPU_CORE(dev); 161 int i; 162 163 for (i = 0; i < cc->nr_threads; i++) { 164 void *obj = sc->threads + i * size; 165 DeviceState *dev = DEVICE(obj); 166 CPUState *cs = CPU(dev); 167 PowerPCCPU *cpu = POWERPC_CPU(cs); 168 169 spapr_cpu_destroy(cpu); 170 object_unparent(cpu->intc); 171 cpu_remove_sync(cs); 172 object_unparent(obj); 173 } 174 g_free(sc->threads); 175 } 176 177 static void spapr_cpu_core_realize_child(Object *child, 178 sPAPRMachineState *spapr, Error **errp) 179 { 180 Error *local_err = NULL; 181 CPUState *cs = CPU(child); 182 PowerPCCPU *cpu = POWERPC_CPU(cs); 183 Object *obj; 184 185 object_property_set_bool(child, true, "realized", &local_err); 186 if (local_err) { 187 goto error; 188 } 189 190 spapr_cpu_init(spapr, cpu, &local_err); 191 if (local_err) { 192 goto error; 193 } 194 195 obj = object_new(spapr->icp_type); 196 object_property_add_child(child, "icp", obj, &error_abort); 197 object_unref(obj); 198 object_property_add_const_link(obj, ICP_PROP_XICS, OBJECT(spapr), 199 &error_abort); 200 object_property_add_const_link(obj, ICP_PROP_CPU, child, &error_abort); 201 object_property_set_bool(obj, true, "realized", &local_err); 202 if (local_err) { 203 goto free_icp; 204 } 205 206 return; 207 208 free_icp: 209 object_unparent(obj); 210 error: 211 error_propagate(errp, local_err); 212 } 213 214 static void spapr_cpu_core_realize(DeviceState *dev, Error **errp) 215 { 216 sPAPRMachineState *spapr; 217 sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev)); 218 sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev)); 219 CPUCore *cc = CPU_CORE(OBJECT(dev)); 220 const char *typename = object_class_get_name(scc->cpu_class); 221 size_t size = object_type_get_instance_size(typename); 222 Error *local_err = NULL; 223 void *obj; 224 int i, j; 225 226 spapr = (sPAPRMachineState *) qdev_get_machine(); 227 if (!object_dynamic_cast((Object *) spapr, TYPE_SPAPR_MACHINE)) { 228 error_setg(errp, "spapr-cpu-core needs a pseries machine"); 229 return; 230 } 231 232 sc->threads = g_malloc0(size * cc->nr_threads); 233 for (i = 0; i < cc->nr_threads; i++) { 234 char id[32]; 235 CPUState *cs; 236 PowerPCCPU *cpu; 237 238 obj = sc->threads + i * size; 239 240 object_initialize(obj, size, typename); 241 cs = CPU(obj); 242 cpu = POWERPC_CPU(cs); 243 cs->cpu_index = cc->core_id + i; 244 cpu->vcpu_id = (cc->core_id * spapr->vsmt / smp_threads) + i; 245 if (kvm_enabled() && !kvm_vcpu_id_is_valid(cpu->vcpu_id)) { 246 error_setg(&local_err, "Can't create CPU with id %d in KVM", 247 cpu->vcpu_id); 248 error_append_hint(&local_err, "Adjust the number of cpus to %d " 249 "or try to raise the number of threads per core\n", 250 cpu->vcpu_id * smp_threads / spapr->vsmt); 251 goto err; 252 } 253 254 255 /* Set NUMA node for the threads belonged to core */ 256 cpu->node_id = sc->node_id; 257 258 snprintf(id, sizeof(id), "thread[%d]", i); 259 object_property_add_child(OBJECT(sc), id, obj, &local_err); 260 if (local_err) { 261 goto err; 262 } 263 object_unref(obj); 264 } 265 266 for (j = 0; j < cc->nr_threads; j++) { 267 obj = sc->threads + j * size; 268 269 spapr_cpu_core_realize_child(obj, spapr, &local_err); 270 if (local_err) { 271 goto err; 272 } 273 } 274 return; 275 276 err: 277 while (--i >= 0) { 278 obj = sc->threads + i * size; 279 object_unparent(obj); 280 } 281 g_free(sc->threads); 282 error_propagate(errp, local_err); 283 } 284 285 static const char *spapr_core_models[] = { 286 /* 970 */ 287 "970_v2.2", 288 289 /* 970MP variants */ 290 "970mp_v1.0", 291 "970mp_v1.1", 292 293 /* POWER5+ */ 294 "power5+_v2.1", 295 296 /* POWER7 */ 297 "power7_v2.3", 298 299 /* POWER7+ */ 300 "power7+_v2.1", 301 302 /* POWER8 */ 303 "power8_v2.0", 304 305 /* POWER8E */ 306 "power8e_v2.1", 307 308 /* POWER8NVL */ 309 "power8nvl_v1.0", 310 311 /* POWER9 */ 312 "power9_v1.0", 313 }; 314 315 static Property spapr_cpu_core_properties[] = { 316 DEFINE_PROP_INT32("node-id", sPAPRCPUCore, node_id, CPU_UNSET_NUMA_NODE_ID), 317 DEFINE_PROP_END_OF_LIST() 318 }; 319 320 void spapr_cpu_core_class_init(ObjectClass *oc, void *data) 321 { 322 DeviceClass *dc = DEVICE_CLASS(oc); 323 sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_CLASS(oc); 324 325 dc->realize = spapr_cpu_core_realize; 326 dc->unrealize = spapr_cpu_core_unrealizefn; 327 dc->props = spapr_cpu_core_properties; 328 scc->cpu_class = cpu_class_by_name(TYPE_POWERPC_CPU, data); 329 g_assert(scc->cpu_class); 330 } 331 332 static const TypeInfo spapr_cpu_core_type_info = { 333 .name = TYPE_SPAPR_CPU_CORE, 334 .parent = TYPE_CPU_CORE, 335 .abstract = true, 336 .instance_size = sizeof(sPAPRCPUCore), 337 .class_size = sizeof(sPAPRCPUCoreClass), 338 }; 339 340 static void spapr_cpu_core_register_types(void) 341 { 342 int i; 343 344 type_register_static(&spapr_cpu_core_type_info); 345 346 for (i = 0; i < ARRAY_SIZE(spapr_core_models); i++) { 347 TypeInfo type_info = { 348 .parent = TYPE_SPAPR_CPU_CORE, 349 .instance_size = sizeof(sPAPRCPUCore), 350 .class_init = spapr_cpu_core_class_init, 351 .class_data = (void *) spapr_core_models[i], 352 }; 353 354 type_info.name = g_strdup_printf("%s-" TYPE_SPAPR_CPU_CORE, 355 spapr_core_models[i]); 356 type_register(&type_info); 357 g_free((void *)type_info.name); 358 } 359 } 360 361 type_init(spapr_cpu_core_register_types) 362