hw/ppc/spapr_cpu_core.c

   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 "qemu/osdep.h"
  10 #include "hw/cpu/core.h"
  11 #include "hw/ppc/spapr_cpu_core.h"
  12 #include "target/ppc/cpu.h"
  13 #include "hw/ppc/spapr.h"
  14 #include "hw/boards.h"
  15 #include "qapi/error.h"
  16 #include "sysemu/cpus.h"
  17 #include "sysemu/kvm.h"
  18 #include "target/ppc/kvm_ppc.h"
  19 #include "hw/ppc/ppc.h"
  20 #include "target/ppc/mmu-hash64.h"
  21 #include "sysemu/numa.h"
  22 #include "sysemu/hw_accel.h"
  23 #include "qemu/error-report.h"
  24
  25 static void spapr_cpu_reset(void *opaque)
  26 {
  27     PowerPCCPU *cpu = opaque;
  28     CPUState *cs = CPU(cpu);
  29     CPUPPCState *env = &cpu->env;
  30     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
  31     SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
  32     target_ulong lpcr;
  33
  34     cpu_reset(cs);
  35
  36     /* All CPUs start halted.  CPU0 is unhalted from the machine level
  37      * reset code and the rest are explicitly started up by the guest
  38      * using an RTAS call */
  39     cs->halted = 1;
  40
  41     /* Set compatibility mode to match the boot CPU, which was either set
  42      * by the machine reset code or by CAS. This should never fail.
  43      */
  44     ppc_set_compat(cpu, POWERPC_CPU(first_cpu)->compat_pvr, &error_abort);
  45
  46     env->spr[SPR_HIOR] = 0;
  47
  48     lpcr = env->spr[SPR_LPCR];
  49
  50     /* Set emulated LPCR to not send interrupts to hypervisor. Note that
  51      * under KVM, the actual HW LPCR will be set differently by KVM itself,
  52      * the settings below ensure proper operations with TCG in absence of
  53      * a real hypervisor.
  54      *
  55      * Clearing VPM0 will also cause us to use RMOR in mmu-hash64.c for
  56      * real mode accesses, which thankfully defaults to 0 and isn't
  57      * accessible in guest mode.
  58      *
  59      * Disable Power-saving mode Exit Cause exceptions for the CPU, so
  60      * we don't get spurious wakups before an RTAS start-cpu call.
  61      */
  62     lpcr &= ~(LPCR_VPM0 | LPCR_VPM1 | LPCR_ISL | LPCR_KBV | pcc->lpcr_pm);
  63     lpcr |= LPCR_LPES0 | LPCR_LPES1;
  64
  65     /* Set RMLS to the max (ie, 16G) */
  66     lpcr &= ~LPCR_RMLS;
  67     lpcr |= 1ull << LPCR_RMLS_SHIFT;
  68
  69     ppc_store_lpcr(cpu, lpcr);
  70
  71     /* Set a full AMOR so guest can use the AMR as it sees fit */
  72     env->spr[SPR_AMOR] = 0xffffffffffffffffull;
  73
  74     spapr_cpu->vpa_addr = 0;
  75     spapr_cpu->slb_shadow_addr = 0;
  76     spapr_cpu->slb_shadow_size = 0;
  77     spapr_cpu->dtl_addr = 0;
  78     spapr_cpu->dtl_size = 0;
  79
  80     spapr_caps_cpu_apply(SPAPR_MACHINE(qdev_get_machine()), cpu);
  81
  82     kvm_check_mmu(cpu, &error_fatal);
  83 }
  84
  85 void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip, target_ulong r3)
  86 {
  87     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
  88     CPUPPCState *env = &cpu->env;
  89
  90     env->nip = nip;
  91     env->gpr[3] = r3;
  92     kvmppc_set_reg_ppc_online(cpu, 1);
  93     CPU(cpu)->halted = 0;
  94     /* Enable Power-saving mode Exit Cause exceptions */
  95     ppc_store_lpcr(cpu, env->spr[SPR_LPCR] | pcc->lpcr_pm);
  96 }
  97
  98 /*
  99  * Return the sPAPR CPU core type for @model which essentially is the CPU
 100  * model specified with -cpu cmdline option.
 101  */
 102 const char *spapr_get_cpu_core_type(const char *cpu_type)
 103 {
 104     int len = strlen(cpu_type) - strlen(POWERPC_CPU_TYPE_SUFFIX);
 105     char *core_type = g_strdup_printf(SPAPR_CPU_CORE_TYPE_NAME("%.*s"),
 106                                       len, cpu_type);
 107     ObjectClass *oc = object_class_by_name(core_type);
 108
 109     g_free(core_type);
 110     if (!oc) {
 111         return NULL;
 112     }
 113
 114     return object_class_get_name(oc);
 115 }
 116
 117 static bool slb_shadow_needed(void *opaque)
 118 {
 119     SpaprCpuState *spapr_cpu = opaque;
 120
 121     return spapr_cpu->slb_shadow_addr != 0;
 122 }
 123
 124 static const VMStateDescription vmstate_spapr_cpu_slb_shadow = {
 125     .name = "spapr_cpu/vpa/slb_shadow",
 126     .version_id = 1,
 127     .minimum_version_id = 1,
 128     .needed = slb_shadow_needed,
 129     .fields = (VMStateField[]) {
 130         VMSTATE_UINT64(slb_shadow_addr, SpaprCpuState),
 131         VMSTATE_UINT64(slb_shadow_size, SpaprCpuState),
 132         VMSTATE_END_OF_LIST()
 133     }
 134 };
 135
 136 static bool dtl_needed(void *opaque)
 137 {
 138     SpaprCpuState *spapr_cpu = opaque;
 139
 140     return spapr_cpu->dtl_addr != 0;
 141 }
 142
 143 static const VMStateDescription vmstate_spapr_cpu_dtl = {
 144     .name = "spapr_cpu/vpa/dtl",
 145     .version_id = 1,
 146     .minimum_version_id = 1,
 147     .needed = dtl_needed,
 148     .fields = (VMStateField[]) {
 149         VMSTATE_UINT64(dtl_addr, SpaprCpuState),
 150         VMSTATE_UINT64(dtl_size, SpaprCpuState),
 151         VMSTATE_END_OF_LIST()
 152     }
 153 };
 154
 155 static bool vpa_needed(void *opaque)
 156 {
 157     SpaprCpuState *spapr_cpu = opaque;
 158
 159     return spapr_cpu->vpa_addr != 0;
 160 }
 161
 162 static const VMStateDescription vmstate_spapr_cpu_vpa = {
 163     .name = "spapr_cpu/vpa",
 164     .version_id = 1,
 165     .minimum_version_id = 1,
 166     .needed = vpa_needed,
 167     .fields = (VMStateField[]) {
 168         VMSTATE_UINT64(vpa_addr, SpaprCpuState),
 169         VMSTATE_END_OF_LIST()
 170     },
 171     .subsections = (const VMStateDescription * []) {
 172         &vmstate_spapr_cpu_slb_shadow,
 173         &vmstate_spapr_cpu_dtl,
 174         NULL
 175     }
 176 };
 177
 178 static const VMStateDescription vmstate_spapr_cpu_state = {
 179     .name = "spapr_cpu",
 180     .version_id = 1,
 181     .minimum_version_id = 1,
 182     .fields = (VMStateField[]) {
 183         VMSTATE_END_OF_LIST()
 184     },
 185     .subsections = (const VMStateDescription * []) {
 186         &vmstate_spapr_cpu_vpa,
 187         NULL
 188     }
 189 };
 190
 191 static void spapr_unrealize_vcpu(PowerPCCPU *cpu, SpaprCpuCore *sc)
 192 {
 193     if (!sc->pre_3_0_migration) {
 194         vmstate_unregister(NULL, &vmstate_spapr_cpu_state, cpu->machine_data);
 195     }
 196     qemu_unregister_reset(spapr_cpu_reset, cpu);
 197     if (spapr_cpu_state(cpu)->icp) {
 198         object_unparent(OBJECT(spapr_cpu_state(cpu)->icp));
 199     }
 200     if (spapr_cpu_state(cpu)->tctx) {
 201         object_unparent(OBJECT(spapr_cpu_state(cpu)->tctx));
 202     }
 203     cpu_remove_sync(CPU(cpu));
 204     object_unparent(OBJECT(cpu));
 205 }
 206
 207 static void spapr_cpu_core_unrealize(DeviceState *dev, Error **errp)
 208 {
 209     SpaprCpuCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
 210     CPUCore *cc = CPU_CORE(dev);
 211     int i;
 212
 213     for (i = 0; i < cc->nr_threads; i++) {
 214         spapr_unrealize_vcpu(sc->threads[i], sc);
 215     }
 216     g_free(sc->threads);
 217 }
 218
 219 static void spapr_realize_vcpu(PowerPCCPU *cpu, SpaprMachineState *spapr,
 220                                SpaprCpuCore *sc, Error **errp)
 221 {
 222     CPUPPCState *env = &cpu->env;
 223     CPUState *cs = CPU(cpu);
 224     Error *local_err = NULL;
 225
 226     object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
 227     if (local_err) {
 228         goto error;
 229     }
 230
 231     /* Set time-base frequency to 512 MHz */
 232     cpu_ppc_tb_init(env, SPAPR_TIMEBASE_FREQ);
 233
 234     cpu_ppc_set_vhyp(cpu, PPC_VIRTUAL_HYPERVISOR(spapr));
 235     kvmppc_set_papr(cpu);
 236
 237     qemu_register_reset(spapr_cpu_reset, cpu);
 238     spapr_cpu_reset(cpu);
 239
 240     spapr->irq->cpu_intc_create(spapr, cpu, &local_err);
 241     if (local_err) {
 242         goto error_unregister;
 243     }
 244
 245     if (!sc->pre_3_0_migration) {
 246         vmstate_register(NULL, cs->cpu_index, &vmstate_spapr_cpu_state,
 247                          cpu->machine_data);
 248     }
 249
 250     return;
 251
 252 error_unregister:
 253     qemu_unregister_reset(spapr_cpu_reset, cpu);
 254     cpu_remove_sync(CPU(cpu));
 255 error:
 256     error_propagate(errp, local_err);
 257 }
 258
 259 static PowerPCCPU *spapr_create_vcpu(SpaprCpuCore *sc, int i, Error **errp)
 260 {
 261     SpaprCpuCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(sc);
 262     CPUCore *cc = CPU_CORE(sc);
 263     Object *obj;
 264     char *id;
 265     CPUState *cs;
 266     PowerPCCPU *cpu;
 267     Error *local_err = NULL;
 268
 269     obj = object_new(scc->cpu_type);
 270
 271     cs = CPU(obj);
 272     cpu = POWERPC_CPU(obj);
 273     cs->cpu_index = cc->core_id + i;
 274     spapr_set_vcpu_id(cpu, cs->cpu_index, &local_err);
 275     if (local_err) {
 276         goto err;
 277     }
 278
 279     cpu->node_id = sc->node_id;
 280
 281     id = g_strdup_printf("thread[%d]", i);
 282     object_property_add_child(OBJECT(sc), id, obj, &local_err);
 283     g_free(id);
 284     if (local_err) {
 285         goto err;
 286     }
 287
 288     cpu->machine_data = g_new0(SpaprCpuState, 1);
 289
 290     object_unref(obj);
 291     return cpu;
 292
 293 err:
 294     object_unref(obj);
 295     error_propagate(errp, local_err);
 296     return NULL;
 297 }
 298
 299 static void spapr_delete_vcpu(PowerPCCPU *cpu, SpaprCpuCore *sc)
 300 {
 301     SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
 302
 303     cpu->machine_data = NULL;
 304     g_free(spapr_cpu);
 305     object_unparent(OBJECT(cpu));
 306 }
 307
 308 static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
 309 {
 310     /* We don't use SPAPR_MACHINE() in order to exit gracefully if the user
 311      * tries to add a sPAPR CPU core to a non-pseries machine.
 312      */
 313     SpaprMachineState *spapr =
 314         (SpaprMachineState *) object_dynamic_cast(qdev_get_machine(),
 315                                                   TYPE_SPAPR_MACHINE);
 316     SpaprCpuCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
 317     CPUCore *cc = CPU_CORE(OBJECT(dev));
 318     Error *local_err = NULL;
 319     int i, j;
 320
 321     if (!spapr) {
 322         error_setg(errp, TYPE_SPAPR_CPU_CORE " needs a pseries machine");
 323         return;
 324     }
 325
 326     sc->threads = g_new(PowerPCCPU *, cc->nr_threads);
 327     for (i = 0; i < cc->nr_threads; i++) {
 328         sc->threads[i] = spapr_create_vcpu(sc, i, &local_err);
 329         if (local_err) {
 330             goto err;
 331         }
 332     }
 333
 334     for (j = 0; j < cc->nr_threads; j++) {
 335         spapr_realize_vcpu(sc->threads[j], spapr, sc, &local_err);
 336         if (local_err) {
 337             goto err_unrealize;
 338         }
 339     }
 340     return;
 341
 342 err_unrealize:
 343     while (--j >= 0) {
 344         spapr_unrealize_vcpu(sc->threads[j], sc);
 345     }
 346 err:
 347     while (--i >= 0) {
 348         spapr_delete_vcpu(sc->threads[i], sc);
 349     }
 350     g_free(sc->threads);
 351     error_propagate(errp, local_err);
 352 }
 353
 354 static Property spapr_cpu_core_properties[] = {
 355     DEFINE_PROP_INT32("node-id", SpaprCpuCore, node_id, CPU_UNSET_NUMA_NODE_ID),
 356     DEFINE_PROP_BOOL("pre-3.0-migration", SpaprCpuCore, pre_3_0_migration,
 357                      false),
 358     DEFINE_PROP_END_OF_LIST()
 359 };
 360
 361 static void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
 362 {
 363     DeviceClass *dc = DEVICE_CLASS(oc);
 364     SpaprCpuCoreClass *scc = SPAPR_CPU_CORE_CLASS(oc);
 365
 366     dc->realize = spapr_cpu_core_realize;
 367     dc->unrealize = spapr_cpu_core_unrealize;
 368     dc->props = spapr_cpu_core_properties;
 369     scc->cpu_type = data;
 370 }
 371
 372 #define DEFINE_SPAPR_CPU_CORE_TYPE(cpu_model) \
 373     {                                                   \
 374         .parent = TYPE_SPAPR_CPU_CORE,                  \
 375         .class_data = (void *) POWERPC_CPU_TYPE_NAME(cpu_model), \
 376         .class_init = spapr_cpu_core_class_init,        \
 377         .name = SPAPR_CPU_CORE_TYPE_NAME(cpu_model),    \
 378     }
 379
 380 static const TypeInfo spapr_cpu_core_type_infos[] = {
 381     {
 382         .name = TYPE_SPAPR_CPU_CORE,
 383         .parent = TYPE_CPU_CORE,
 384         .abstract = true,
 385         .instance_size = sizeof(SpaprCpuCore),
 386         .class_size = sizeof(SpaprCpuCoreClass),
 387     },
 388     DEFINE_SPAPR_CPU_CORE_TYPE("970_v2.2"),
 389     DEFINE_SPAPR_CPU_CORE_TYPE("970mp_v1.0"),
 390     DEFINE_SPAPR_CPU_CORE_TYPE("970mp_v1.1"),
 391     DEFINE_SPAPR_CPU_CORE_TYPE("power5+_v2.1"),
 392     DEFINE_SPAPR_CPU_CORE_TYPE("power7_v2.3"),
 393     DEFINE_SPAPR_CPU_CORE_TYPE("power7+_v2.1"),
 394     DEFINE_SPAPR_CPU_CORE_TYPE("power8_v2.0"),
 395     DEFINE_SPAPR_CPU_CORE_TYPE("power8e_v2.1"),
 396     DEFINE_SPAPR_CPU_CORE_TYPE("power8nvl_v1.0"),
 397     DEFINE_SPAPR_CPU_CORE_TYPE("power9_v1.0"),
 398     DEFINE_SPAPR_CPU_CORE_TYPE("power9_v2.0"),
 399 #ifdef CONFIG_KVM
 400     DEFINE_SPAPR_CPU_CORE_TYPE("host"),
 401 #endif
 402 };
 403
 404 DEFINE_TYPES(spapr_cpu_core_type_infos)