1 /* 2 * QEMU S390x KVM implementation 3 * 4 * Copyright (c) 2009 Alexander Graf <agraf@suse.de> 5 * Copyright IBM Corp. 2012 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include <sys/ioctl.h> 23 24 #include <linux/kvm.h> 25 #include <asm/ptrace.h> 26 27 #include "cpu.h" 28 #include "s390x-internal.h" 29 #include "kvm_s390x.h" 30 #include "sysemu/kvm_int.h" 31 #include "qemu/cutils.h" 32 #include "qapi/error.h" 33 #include "qemu/error-report.h" 34 #include "qemu/timer.h" 35 #include "qemu/units.h" 36 #include "qemu/main-loop.h" 37 #include "qemu/mmap-alloc.h" 38 #include "qemu/log.h" 39 #include "sysemu/sysemu.h" 40 #include "sysemu/hw_accel.h" 41 #include "sysemu/runstate.h" 42 #include "sysemu/device_tree.h" 43 #include "exec/gdbstub.h" 44 #include "exec/ram_addr.h" 45 #include "trace.h" 46 #include "hw/s390x/s390-pci-inst.h" 47 #include "hw/s390x/s390-pci-bus.h" 48 #include "hw/s390x/ipl.h" 49 #include "hw/s390x/ebcdic.h" 50 #include "exec/memattrs.h" 51 #include "hw/s390x/s390-virtio-ccw.h" 52 #include "hw/s390x/s390-virtio-hcall.h" 53 #include "target/s390x/kvm/pv.h" 54 55 #define kvm_vm_check_mem_attr(s, attr) \ 56 kvm_vm_check_attr(s, KVM_S390_VM_MEM_CTRL, attr) 57 58 #define IPA0_DIAG 0x8300 59 #define IPA0_SIGP 0xae00 60 #define IPA0_B2 0xb200 61 #define IPA0_B9 0xb900 62 #define IPA0_EB 0xeb00 63 #define IPA0_E3 0xe300 64 65 #define PRIV_B2_SCLP_CALL 0x20 66 #define PRIV_B2_CSCH 0x30 67 #define PRIV_B2_HSCH 0x31 68 #define PRIV_B2_MSCH 0x32 69 #define PRIV_B2_SSCH 0x33 70 #define PRIV_B2_STSCH 0x34 71 #define PRIV_B2_TSCH 0x35 72 #define PRIV_B2_TPI 0x36 73 #define PRIV_B2_SAL 0x37 74 #define PRIV_B2_RSCH 0x38 75 #define PRIV_B2_STCRW 0x39 76 #define PRIV_B2_STCPS 0x3a 77 #define PRIV_B2_RCHP 0x3b 78 #define PRIV_B2_SCHM 0x3c 79 #define PRIV_B2_CHSC 0x5f 80 #define PRIV_B2_SIGA 0x74 81 #define PRIV_B2_XSCH 0x76 82 83 #define PRIV_EB_SQBS 0x8a 84 #define PRIV_EB_PCISTB 0xd0 85 #define PRIV_EB_SIC 0xd1 86 87 #define PRIV_B9_EQBS 0x9c 88 #define PRIV_B9_CLP 0xa0 89 #define PRIV_B9_PTF 0xa2 90 #define PRIV_B9_PCISTG 0xd0 91 #define PRIV_B9_PCILG 0xd2 92 #define PRIV_B9_RPCIT 0xd3 93 94 #define PRIV_E3_MPCIFC 0xd0 95 #define PRIV_E3_STPCIFC 0xd4 96 97 #define DIAG_TIMEREVENT 0x288 98 #define DIAG_IPL 0x308 99 #define DIAG_SET_CONTROL_PROGRAM_CODES 0x318 100 #define DIAG_KVM_HYPERCALL 0x500 101 #define DIAG_KVM_BREAKPOINT 0x501 102 103 #define ICPT_INSTRUCTION 0x04 104 #define ICPT_PROGRAM 0x08 105 #define ICPT_EXT_INT 0x14 106 #define ICPT_WAITPSW 0x1c 107 #define ICPT_SOFT_INTERCEPT 0x24 108 #define ICPT_CPU_STOP 0x28 109 #define ICPT_OPEREXC 0x2c 110 #define ICPT_IO 0x40 111 #define ICPT_PV_INSTR 0x68 112 #define ICPT_PV_INSTR_NOTIFICATION 0x6c 113 114 #define NR_LOCAL_IRQS 32 115 /* 116 * Needs to be big enough to contain max_cpus emergency signals 117 * and in addition NR_LOCAL_IRQS interrupts 118 */ 119 #define VCPU_IRQ_BUF_SIZE(max_cpus) (sizeof(struct kvm_s390_irq) * \ 120 (max_cpus + NR_LOCAL_IRQS)) 121 /* 122 * KVM does only support memory slots up to KVM_MEM_MAX_NR_PAGES pages 123 * as the dirty bitmap must be managed by bitops that take an int as 124 * position indicator. This would end at an unaligned address 125 * (0x7fffff00000). As future variants might provide larger pages 126 * and to make all addresses properly aligned, let us split at 4TB. 127 */ 128 #define KVM_SLOT_MAX_BYTES (4UL * TiB) 129 130 static CPUWatchpoint hw_watchpoint; 131 /* 132 * We don't use a list because this structure is also used to transmit the 133 * hardware breakpoints to the kernel. 134 */ 135 static struct kvm_hw_breakpoint *hw_breakpoints; 136 static int nb_hw_breakpoints; 137 138 const KVMCapabilityInfo kvm_arch_required_capabilities[] = { 139 KVM_CAP_LAST_INFO 140 }; 141 142 static int cap_async_pf; 143 static int cap_mem_op; 144 static int cap_mem_op_extension; 145 static int cap_s390_irq; 146 static int cap_ri; 147 static int cap_hpage_1m; 148 static int cap_vcpu_resets; 149 static int cap_protected; 150 static int cap_zpci_op; 151 static int cap_protected_dump; 152 153 static bool mem_op_storage_key_support; 154 155 static int active_cmma; 156 157 static int kvm_s390_query_mem_limit(uint64_t *memory_limit) 158 { 159 struct kvm_device_attr attr = { 160 .group = KVM_S390_VM_MEM_CTRL, 161 .attr = KVM_S390_VM_MEM_LIMIT_SIZE, 162 .addr = (uint64_t) memory_limit, 163 }; 164 165 return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 166 } 167 168 int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit) 169 { 170 int rc; 171 172 struct kvm_device_attr attr = { 173 .group = KVM_S390_VM_MEM_CTRL, 174 .attr = KVM_S390_VM_MEM_LIMIT_SIZE, 175 .addr = (uint64_t) &new_limit, 176 }; 177 178 if (!kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_LIMIT_SIZE)) { 179 return 0; 180 } 181 182 rc = kvm_s390_query_mem_limit(hw_limit); 183 if (rc) { 184 return rc; 185 } else if (*hw_limit < new_limit) { 186 return -E2BIG; 187 } 188 189 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 190 } 191 192 int kvm_s390_cmma_active(void) 193 { 194 return active_cmma; 195 } 196 197 static bool kvm_s390_cmma_available(void) 198 { 199 static bool initialized, value; 200 201 if (!initialized) { 202 initialized = true; 203 value = kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_ENABLE_CMMA) && 204 kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_CLR_CMMA); 205 } 206 return value; 207 } 208 209 void kvm_s390_cmma_reset(void) 210 { 211 int rc; 212 struct kvm_device_attr attr = { 213 .group = KVM_S390_VM_MEM_CTRL, 214 .attr = KVM_S390_VM_MEM_CLR_CMMA, 215 }; 216 217 if (!kvm_s390_cmma_active()) { 218 return; 219 } 220 221 rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 222 trace_kvm_clear_cmma(rc); 223 } 224 225 static void kvm_s390_enable_cmma(void) 226 { 227 int rc; 228 struct kvm_device_attr attr = { 229 .group = KVM_S390_VM_MEM_CTRL, 230 .attr = KVM_S390_VM_MEM_ENABLE_CMMA, 231 }; 232 233 if (cap_hpage_1m) { 234 warn_report("CMM will not be enabled because it is not " 235 "compatible with huge memory backings."); 236 return; 237 } 238 rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 239 active_cmma = !rc; 240 trace_kvm_enable_cmma(rc); 241 } 242 243 static void kvm_s390_set_crypto_attr(uint64_t attr) 244 { 245 struct kvm_device_attr attribute = { 246 .group = KVM_S390_VM_CRYPTO, 247 .attr = attr, 248 }; 249 250 int ret = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); 251 252 if (ret) { 253 error_report("Failed to set crypto device attribute %lu: %s", 254 attr, strerror(-ret)); 255 } 256 } 257 258 static void kvm_s390_init_aes_kw(void) 259 { 260 uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_AES_KW; 261 262 if (object_property_get_bool(OBJECT(qdev_get_machine()), "aes-key-wrap", 263 NULL)) { 264 attr = KVM_S390_VM_CRYPTO_ENABLE_AES_KW; 265 } 266 267 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { 268 kvm_s390_set_crypto_attr(attr); 269 } 270 } 271 272 static void kvm_s390_init_dea_kw(void) 273 { 274 uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_DEA_KW; 275 276 if (object_property_get_bool(OBJECT(qdev_get_machine()), "dea-key-wrap", 277 NULL)) { 278 attr = KVM_S390_VM_CRYPTO_ENABLE_DEA_KW; 279 } 280 281 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { 282 kvm_s390_set_crypto_attr(attr); 283 } 284 } 285 286 void kvm_s390_crypto_reset(void) 287 { 288 if (s390_has_feat(S390_FEAT_MSA_EXT_3)) { 289 kvm_s390_init_aes_kw(); 290 kvm_s390_init_dea_kw(); 291 } 292 } 293 294 void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp) 295 { 296 if (pagesize == 4 * KiB) { 297 return; 298 } 299 300 if (!hpage_1m_allowed()) { 301 error_setg(errp, "This QEMU machine does not support huge page " 302 "mappings"); 303 return; 304 } 305 306 if (pagesize != 1 * MiB) { 307 error_setg(errp, "Memory backing with 2G pages was specified, " 308 "but KVM does not support this memory backing"); 309 return; 310 } 311 312 if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_HPAGE_1M, 0)) { 313 error_setg(errp, "Memory backing with 1M pages was specified, " 314 "but KVM does not support this memory backing"); 315 return; 316 } 317 318 cap_hpage_1m = 1; 319 } 320 321 int kvm_s390_get_hpage_1m(void) 322 { 323 return cap_hpage_1m; 324 } 325 326 static void ccw_machine_class_foreach(ObjectClass *oc, void *opaque) 327 { 328 MachineClass *mc = MACHINE_CLASS(oc); 329 330 mc->default_cpu_type = S390_CPU_TYPE_NAME("host"); 331 } 332 333 int kvm_arch_get_default_type(MachineState *ms) 334 { 335 return 0; 336 } 337 338 int kvm_arch_init(MachineState *ms, KVMState *s) 339 { 340 int required_caps[] = { 341 KVM_CAP_DEVICE_CTRL, 342 KVM_CAP_SYNC_REGS, 343 }; 344 345 for (int i = 0; i < ARRAY_SIZE(required_caps); i++) { 346 if (!kvm_check_extension(s, required_caps[i])) { 347 error_report("KVM is missing capability #%d - " 348 "please use kernel 3.15 or newer", required_caps[i]); 349 return -1; 350 } 351 } 352 353 object_class_foreach(ccw_machine_class_foreach, TYPE_S390_CCW_MACHINE, 354 false, NULL); 355 356 if (!kvm_check_extension(s, KVM_CAP_S390_COW)) { 357 error_report("KVM is missing capability KVM_CAP_S390_COW - " 358 "unsupported environment"); 359 return -1; 360 } 361 362 cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF); 363 cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP); 364 cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION); 365 mem_op_storage_key_support = cap_mem_op_extension > 0; 366 cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ); 367 cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS); 368 cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED); 369 cap_zpci_op = kvm_check_extension(s, KVM_CAP_S390_ZPCI_OP); 370 cap_protected_dump = kvm_check_extension(s, KVM_CAP_S390_PROTECTED_DUMP); 371 372 kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0); 373 kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0); 374 kvm_vm_enable_cap(s, KVM_CAP_S390_USER_STSI, 0); 375 kvm_vm_enable_cap(s, KVM_CAP_S390_CPU_TOPOLOGY, 0); 376 if (ri_allowed()) { 377 if (kvm_vm_enable_cap(s, KVM_CAP_S390_RI, 0) == 0) { 378 cap_ri = 1; 379 } 380 } 381 if (cpu_model_allowed()) { 382 kvm_vm_enable_cap(s, KVM_CAP_S390_GS, 0); 383 } 384 385 /* 386 * The migration interface for ais was introduced with kernel 4.13 387 * but the capability itself had been active since 4.12. As migration 388 * support is considered necessary, we only try to enable this for 389 * newer machine types if KVM_CAP_S390_AIS_MIGRATION is available. 390 */ 391 if (cpu_model_allowed() && kvm_kernel_irqchip_allowed() && 392 kvm_check_extension(s, KVM_CAP_S390_AIS_MIGRATION)) { 393 kvm_vm_enable_cap(s, KVM_CAP_S390_AIS, 0); 394 } 395 396 kvm_set_max_memslot_size(KVM_SLOT_MAX_BYTES); 397 return 0; 398 } 399 400 int kvm_arch_irqchip_create(KVMState *s) 401 { 402 return 0; 403 } 404 405 unsigned long kvm_arch_vcpu_id(CPUState *cpu) 406 { 407 return cpu->cpu_index; 408 } 409 410 int kvm_arch_init_vcpu(CPUState *cs) 411 { 412 unsigned int max_cpus = MACHINE(qdev_get_machine())->smp.max_cpus; 413 S390CPU *cpu = S390_CPU(cs); 414 kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state); 415 cpu->irqstate = g_malloc0(VCPU_IRQ_BUF_SIZE(max_cpus)); 416 return 0; 417 } 418 419 int kvm_arch_destroy_vcpu(CPUState *cs) 420 { 421 S390CPU *cpu = S390_CPU(cs); 422 423 g_free(cpu->irqstate); 424 cpu->irqstate = NULL; 425 426 return 0; 427 } 428 429 static void kvm_s390_reset_vcpu(S390CPU *cpu, unsigned long type) 430 { 431 CPUState *cs = CPU(cpu); 432 433 /* 434 * The reset call is needed here to reset in-kernel vcpu data that 435 * we can't access directly from QEMU (i.e. with older kernels 436 * which don't support sync_regs/ONE_REG). Before this ioctl 437 * cpu_synchronize_state() is called in common kvm code 438 * (kvm-all). 439 */ 440 if (kvm_vcpu_ioctl(cs, type)) { 441 error_report("CPU reset failed on CPU %i type %lx", 442 cs->cpu_index, type); 443 } 444 } 445 446 void kvm_s390_reset_vcpu_initial(S390CPU *cpu) 447 { 448 kvm_s390_reset_vcpu(cpu, KVM_S390_INITIAL_RESET); 449 } 450 451 void kvm_s390_reset_vcpu_clear(S390CPU *cpu) 452 { 453 if (cap_vcpu_resets) { 454 kvm_s390_reset_vcpu(cpu, KVM_S390_CLEAR_RESET); 455 } else { 456 kvm_s390_reset_vcpu(cpu, KVM_S390_INITIAL_RESET); 457 } 458 } 459 460 void kvm_s390_reset_vcpu_normal(S390CPU *cpu) 461 { 462 if (cap_vcpu_resets) { 463 kvm_s390_reset_vcpu(cpu, KVM_S390_NORMAL_RESET); 464 } 465 } 466 467 static int can_sync_regs(CPUState *cs, int regs) 468 { 469 return (cs->kvm_run->kvm_valid_regs & regs) == regs; 470 } 471 472 #define KVM_SYNC_REQUIRED_REGS (KVM_SYNC_GPRS | KVM_SYNC_ACRS | \ 473 KVM_SYNC_CRS | KVM_SYNC_PREFIX) 474 475 int kvm_arch_put_registers(CPUState *cs, int level) 476 { 477 S390CPU *cpu = S390_CPU(cs); 478 CPUS390XState *env = &cpu->env; 479 struct kvm_fpu fpu = {}; 480 int r; 481 int i; 482 483 g_assert(can_sync_regs(cs, KVM_SYNC_REQUIRED_REGS)); 484 485 /* always save the PSW and the GPRS*/ 486 cs->kvm_run->psw_addr = env->psw.addr; 487 cs->kvm_run->psw_mask = env->psw.mask; 488 489 memcpy(cs->kvm_run->s.regs.gprs, env->regs, sizeof(cs->kvm_run->s.regs.gprs)); 490 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS; 491 492 if (can_sync_regs(cs, KVM_SYNC_VRS)) { 493 for (i = 0; i < 32; i++) { 494 cs->kvm_run->s.regs.vrs[i][0] = env->vregs[i][0]; 495 cs->kvm_run->s.regs.vrs[i][1] = env->vregs[i][1]; 496 } 497 cs->kvm_run->s.regs.fpc = env->fpc; 498 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS; 499 } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) { 500 for (i = 0; i < 16; i++) { 501 cs->kvm_run->s.regs.fprs[i] = *get_freg(env, i); 502 } 503 cs->kvm_run->s.regs.fpc = env->fpc; 504 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_FPRS; 505 } else { 506 /* Floating point */ 507 for (i = 0; i < 16; i++) { 508 fpu.fprs[i] = *get_freg(env, i); 509 } 510 fpu.fpc = env->fpc; 511 512 r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu); 513 if (r < 0) { 514 return r; 515 } 516 } 517 518 /* Do we need to save more than that? */ 519 if (level == KVM_PUT_RUNTIME_STATE) { 520 return 0; 521 } 522 523 /* 524 * Access registers, control registers and the prefix - these are 525 * always available via kvm_sync_regs in the kernels that we support 526 */ 527 memcpy(cs->kvm_run->s.regs.acrs, env->aregs, sizeof(cs->kvm_run->s.regs.acrs)); 528 memcpy(cs->kvm_run->s.regs.crs, env->cregs, sizeof(cs->kvm_run->s.regs.crs)); 529 cs->kvm_run->s.regs.prefix = env->psa; 530 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS | KVM_SYNC_CRS | KVM_SYNC_PREFIX; 531 532 if (can_sync_regs(cs, KVM_SYNC_ARCH0)) { 533 cs->kvm_run->s.regs.cputm = env->cputm; 534 cs->kvm_run->s.regs.ckc = env->ckc; 535 cs->kvm_run->s.regs.todpr = env->todpr; 536 cs->kvm_run->s.regs.gbea = env->gbea; 537 cs->kvm_run->s.regs.pp = env->pp; 538 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ARCH0; 539 } else { 540 /* 541 * These ONE_REGS are not protected by a capability. As they are only 542 * necessary for migration we just trace a possible error, but don't 543 * return with an error return code. 544 */ 545 kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm); 546 kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc); 547 kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr); 548 kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea); 549 kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp); 550 } 551 552 if (can_sync_regs(cs, KVM_SYNC_RICCB)) { 553 memcpy(cs->kvm_run->s.regs.riccb, env->riccb, 64); 554 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_RICCB; 555 } 556 557 /* pfault parameters */ 558 if (can_sync_regs(cs, KVM_SYNC_PFAULT)) { 559 cs->kvm_run->s.regs.pft = env->pfault_token; 560 cs->kvm_run->s.regs.pfs = env->pfault_select; 561 cs->kvm_run->s.regs.pfc = env->pfault_compare; 562 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT; 563 } else if (cap_async_pf) { 564 r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token); 565 if (r < 0) { 566 return r; 567 } 568 r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare); 569 if (r < 0) { 570 return r; 571 } 572 r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select); 573 if (r < 0) { 574 return r; 575 } 576 } 577 578 if (can_sync_regs(cs, KVM_SYNC_GSCB)) { 579 memcpy(cs->kvm_run->s.regs.gscb, env->gscb, 32); 580 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GSCB; 581 } 582 583 if (can_sync_regs(cs, KVM_SYNC_BPBC)) { 584 cs->kvm_run->s.regs.bpbc = env->bpbc; 585 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_BPBC; 586 } 587 588 if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) { 589 cs->kvm_run->s.regs.etoken = env->etoken; 590 cs->kvm_run->s.regs.etoken_extension = env->etoken_extension; 591 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ETOKEN; 592 } 593 594 if (can_sync_regs(cs, KVM_SYNC_DIAG318)) { 595 cs->kvm_run->s.regs.diag318 = env->diag318_info; 596 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318; 597 } 598 599 return 0; 600 } 601 602 int kvm_arch_get_registers(CPUState *cs) 603 { 604 S390CPU *cpu = S390_CPU(cs); 605 CPUS390XState *env = &cpu->env; 606 struct kvm_fpu fpu; 607 int i, r; 608 609 /* get the PSW */ 610 env->psw.addr = cs->kvm_run->psw_addr; 611 env->psw.mask = cs->kvm_run->psw_mask; 612 613 /* the GPRS, ACRS and CRS */ 614 g_assert(can_sync_regs(cs, KVM_SYNC_REQUIRED_REGS)); 615 memcpy(env->regs, cs->kvm_run->s.regs.gprs, sizeof(env->regs)); 616 memcpy(env->aregs, cs->kvm_run->s.regs.acrs, sizeof(env->aregs)); 617 memcpy(env->cregs, cs->kvm_run->s.regs.crs, sizeof(env->cregs)); 618 619 /* The prefix */ 620 env->psa = cs->kvm_run->s.regs.prefix; 621 622 /* Floating point and vector registers */ 623 if (can_sync_regs(cs, KVM_SYNC_VRS)) { 624 for (i = 0; i < 32; i++) { 625 env->vregs[i][0] = cs->kvm_run->s.regs.vrs[i][0]; 626 env->vregs[i][1] = cs->kvm_run->s.regs.vrs[i][1]; 627 } 628 env->fpc = cs->kvm_run->s.regs.fpc; 629 } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) { 630 for (i = 0; i < 16; i++) { 631 *get_freg(env, i) = cs->kvm_run->s.regs.fprs[i]; 632 } 633 env->fpc = cs->kvm_run->s.regs.fpc; 634 } else { 635 r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu); 636 if (r < 0) { 637 return r; 638 } 639 for (i = 0; i < 16; i++) { 640 *get_freg(env, i) = fpu.fprs[i]; 641 } 642 env->fpc = fpu.fpc; 643 } 644 645 if (can_sync_regs(cs, KVM_SYNC_ARCH0)) { 646 env->cputm = cs->kvm_run->s.regs.cputm; 647 env->ckc = cs->kvm_run->s.regs.ckc; 648 env->todpr = cs->kvm_run->s.regs.todpr; 649 env->gbea = cs->kvm_run->s.regs.gbea; 650 env->pp = cs->kvm_run->s.regs.pp; 651 } else { 652 /* 653 * These ONE_REGS are not protected by a capability. As they are only 654 * necessary for migration we just trace a possible error, but don't 655 * return with an error return code. 656 */ 657 kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm); 658 kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc); 659 kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr); 660 kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea); 661 kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp); 662 } 663 664 if (can_sync_regs(cs, KVM_SYNC_RICCB)) { 665 memcpy(env->riccb, cs->kvm_run->s.regs.riccb, 64); 666 } 667 668 if (can_sync_regs(cs, KVM_SYNC_GSCB)) { 669 memcpy(env->gscb, cs->kvm_run->s.regs.gscb, 32); 670 } 671 672 if (can_sync_regs(cs, KVM_SYNC_BPBC)) { 673 env->bpbc = cs->kvm_run->s.regs.bpbc; 674 } 675 676 if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) { 677 env->etoken = cs->kvm_run->s.regs.etoken; 678 env->etoken_extension = cs->kvm_run->s.regs.etoken_extension; 679 } 680 681 /* pfault parameters */ 682 if (can_sync_regs(cs, KVM_SYNC_PFAULT)) { 683 env->pfault_token = cs->kvm_run->s.regs.pft; 684 env->pfault_select = cs->kvm_run->s.regs.pfs; 685 env->pfault_compare = cs->kvm_run->s.regs.pfc; 686 } else if (cap_async_pf) { 687 r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token); 688 if (r < 0) { 689 return r; 690 } 691 r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare); 692 if (r < 0) { 693 return r; 694 } 695 r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select); 696 if (r < 0) { 697 return r; 698 } 699 } 700 701 if (can_sync_regs(cs, KVM_SYNC_DIAG318)) { 702 env->diag318_info = cs->kvm_run->s.regs.diag318; 703 } 704 705 return 0; 706 } 707 708 int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_low) 709 { 710 int r; 711 struct kvm_device_attr attr = { 712 .group = KVM_S390_VM_TOD, 713 .attr = KVM_S390_VM_TOD_LOW, 714 .addr = (uint64_t)tod_low, 715 }; 716 717 r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 718 if (r) { 719 return r; 720 } 721 722 attr.attr = KVM_S390_VM_TOD_HIGH; 723 attr.addr = (uint64_t)tod_high; 724 return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 725 } 726 727 int kvm_s390_get_clock_ext(uint8_t *tod_high, uint64_t *tod_low) 728 { 729 int r; 730 struct kvm_s390_vm_tod_clock gtod; 731 struct kvm_device_attr attr = { 732 .group = KVM_S390_VM_TOD, 733 .attr = KVM_S390_VM_TOD_EXT, 734 .addr = (uint64_t)>od, 735 }; 736 737 r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 738 *tod_high = gtod.epoch_idx; 739 *tod_low = gtod.tod; 740 741 return r; 742 } 743 744 int kvm_s390_set_clock(uint8_t tod_high, uint64_t tod_low) 745 { 746 int r; 747 struct kvm_device_attr attr = { 748 .group = KVM_S390_VM_TOD, 749 .attr = KVM_S390_VM_TOD_LOW, 750 .addr = (uint64_t)&tod_low, 751 }; 752 753 r = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 754 if (r) { 755 return r; 756 } 757 758 attr.attr = KVM_S390_VM_TOD_HIGH; 759 attr.addr = (uint64_t)&tod_high; 760 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 761 } 762 763 int kvm_s390_set_clock_ext(uint8_t tod_high, uint64_t tod_low) 764 { 765 struct kvm_s390_vm_tod_clock gtod = { 766 .epoch_idx = tod_high, 767 .tod = tod_low, 768 }; 769 struct kvm_device_attr attr = { 770 .group = KVM_S390_VM_TOD, 771 .attr = KVM_S390_VM_TOD_EXT, 772 .addr = (uint64_t)>od, 773 }; 774 775 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 776 } 777 778 /** 779 * kvm_s390_mem_op: 780 * @addr: the logical start address in guest memory 781 * @ar: the access register number 782 * @hostbuf: buffer in host memory. NULL = do only checks w/o copying 783 * @len: length that should be transferred 784 * @is_write: true = write, false = read 785 * Returns: 0 on success, non-zero if an exception or error occurred 786 * 787 * Use KVM ioctl to read/write from/to guest memory. An access exception 788 * is injected into the vCPU in case of translation errors. 789 */ 790 int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf, 791 int len, bool is_write) 792 { 793 struct kvm_s390_mem_op mem_op = { 794 .gaddr = addr, 795 .flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION, 796 .size = len, 797 .op = is_write ? KVM_S390_MEMOP_LOGICAL_WRITE 798 : KVM_S390_MEMOP_LOGICAL_READ, 799 .buf = (uint64_t)hostbuf, 800 .ar = ar, 801 .key = (cpu->env.psw.mask & PSW_MASK_KEY) >> PSW_SHIFT_KEY, 802 }; 803 int ret; 804 805 if (!cap_mem_op) { 806 return -ENOSYS; 807 } 808 if (!hostbuf) { 809 mem_op.flags |= KVM_S390_MEMOP_F_CHECK_ONLY; 810 } 811 if (mem_op_storage_key_support) { 812 mem_op.flags |= KVM_S390_MEMOP_F_SKEY_PROTECTION; 813 } 814 815 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op); 816 if (ret < 0) { 817 warn_report("KVM_S390_MEM_OP failed: %s", strerror(-ret)); 818 } 819 return ret; 820 } 821 822 int kvm_s390_mem_op_pv(S390CPU *cpu, uint64_t offset, void *hostbuf, 823 int len, bool is_write) 824 { 825 struct kvm_s390_mem_op mem_op = { 826 .sida_offset = offset, 827 .size = len, 828 .op = is_write ? KVM_S390_MEMOP_SIDA_WRITE 829 : KVM_S390_MEMOP_SIDA_READ, 830 .buf = (uint64_t)hostbuf, 831 }; 832 int ret; 833 834 if (!cap_mem_op || !cap_protected) { 835 return -ENOSYS; 836 } 837 838 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op); 839 if (ret < 0) { 840 error_report("KVM_S390_MEM_OP failed: %s", strerror(-ret)); 841 abort(); 842 } 843 return ret; 844 } 845 846 static uint8_t const *sw_bp_inst; 847 static uint8_t sw_bp_ilen; 848 849 static void determine_sw_breakpoint_instr(void) 850 { 851 /* DIAG 501 is used for sw breakpoints with old kernels */ 852 static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; 853 /* Instruction 0x0000 is used for sw breakpoints with recent kernels */ 854 static const uint8_t instr_0x0000[] = {0x00, 0x00}; 855 856 if (sw_bp_inst) { 857 return; 858 } 859 if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_USER_INSTR0, 0)) { 860 sw_bp_inst = diag_501; 861 sw_bp_ilen = sizeof(diag_501); 862 trace_kvm_sw_breakpoint(4); 863 } else { 864 sw_bp_inst = instr_0x0000; 865 sw_bp_ilen = sizeof(instr_0x0000); 866 trace_kvm_sw_breakpoint(2); 867 } 868 } 869 870 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 871 { 872 determine_sw_breakpoint_instr(); 873 874 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 875 sw_bp_ilen, 0) || 876 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)sw_bp_inst, sw_bp_ilen, 1)) { 877 return -EINVAL; 878 } 879 return 0; 880 } 881 882 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 883 { 884 uint8_t t[MAX_ILEN]; 885 886 if (cpu_memory_rw_debug(cs, bp->pc, t, sw_bp_ilen, 0)) { 887 return -EINVAL; 888 } else if (memcmp(t, sw_bp_inst, sw_bp_ilen)) { 889 return -EINVAL; 890 } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 891 sw_bp_ilen, 1)) { 892 return -EINVAL; 893 } 894 895 return 0; 896 } 897 898 static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr, 899 int len, int type) 900 { 901 int n; 902 903 for (n = 0; n < nb_hw_breakpoints; n++) { 904 if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type && 905 (hw_breakpoints[n].len == len || len == -1)) { 906 return &hw_breakpoints[n]; 907 } 908 } 909 910 return NULL; 911 } 912 913 static int insert_hw_breakpoint(target_ulong addr, int len, int type) 914 { 915 int size; 916 917 if (find_hw_breakpoint(addr, len, type)) { 918 return -EEXIST; 919 } 920 921 size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint); 922 923 if (!hw_breakpoints) { 924 nb_hw_breakpoints = 0; 925 hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size); 926 } else { 927 hw_breakpoints = 928 (struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size); 929 } 930 931 if (!hw_breakpoints) { 932 nb_hw_breakpoints = 0; 933 return -ENOMEM; 934 } 935 936 hw_breakpoints[nb_hw_breakpoints].addr = addr; 937 hw_breakpoints[nb_hw_breakpoints].len = len; 938 hw_breakpoints[nb_hw_breakpoints].type = type; 939 940 nb_hw_breakpoints++; 941 942 return 0; 943 } 944 945 int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type) 946 { 947 switch (type) { 948 case GDB_BREAKPOINT_HW: 949 type = KVM_HW_BP; 950 break; 951 case GDB_WATCHPOINT_WRITE: 952 if (len < 1) { 953 return -EINVAL; 954 } 955 type = KVM_HW_WP_WRITE; 956 break; 957 default: 958 return -ENOSYS; 959 } 960 return insert_hw_breakpoint(addr, len, type); 961 } 962 963 int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type) 964 { 965 int size; 966 struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type); 967 968 if (bp == NULL) { 969 return -ENOENT; 970 } 971 972 nb_hw_breakpoints--; 973 if (nb_hw_breakpoints > 0) { 974 /* 975 * In order to trim the array, move the last element to the position to 976 * be removed - if necessary. 977 */ 978 if (bp != &hw_breakpoints[nb_hw_breakpoints]) { 979 *bp = hw_breakpoints[nb_hw_breakpoints]; 980 } 981 size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint); 982 hw_breakpoints = 983 g_realloc(hw_breakpoints, size); 984 } else { 985 g_free(hw_breakpoints); 986 hw_breakpoints = NULL; 987 } 988 989 return 0; 990 } 991 992 void kvm_arch_remove_all_hw_breakpoints(void) 993 { 994 nb_hw_breakpoints = 0; 995 g_free(hw_breakpoints); 996 hw_breakpoints = NULL; 997 } 998 999 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) 1000 { 1001 int i; 1002 1003 if (nb_hw_breakpoints > 0) { 1004 dbg->arch.nr_hw_bp = nb_hw_breakpoints; 1005 dbg->arch.hw_bp = hw_breakpoints; 1006 1007 for (i = 0; i < nb_hw_breakpoints; ++i) { 1008 hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu, 1009 hw_breakpoints[i].addr); 1010 } 1011 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 1012 } else { 1013 dbg->arch.nr_hw_bp = 0; 1014 dbg->arch.hw_bp = NULL; 1015 } 1016 } 1017 1018 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) 1019 { 1020 } 1021 1022 MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) 1023 { 1024 return MEMTXATTRS_UNSPECIFIED; 1025 } 1026 1027 int kvm_arch_process_async_events(CPUState *cs) 1028 { 1029 return cs->halted; 1030 } 1031 1032 static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq, 1033 struct kvm_s390_interrupt *interrupt) 1034 { 1035 int r = 0; 1036 1037 interrupt->type = irq->type; 1038 switch (irq->type) { 1039 case KVM_S390_INT_VIRTIO: 1040 interrupt->parm = irq->u.ext.ext_params; 1041 /* fall through */ 1042 case KVM_S390_INT_PFAULT_INIT: 1043 case KVM_S390_INT_PFAULT_DONE: 1044 interrupt->parm64 = irq->u.ext.ext_params2; 1045 break; 1046 case KVM_S390_PROGRAM_INT: 1047 interrupt->parm = irq->u.pgm.code; 1048 break; 1049 case KVM_S390_SIGP_SET_PREFIX: 1050 interrupt->parm = irq->u.prefix.address; 1051 break; 1052 case KVM_S390_INT_SERVICE: 1053 interrupt->parm = irq->u.ext.ext_params; 1054 break; 1055 case KVM_S390_MCHK: 1056 interrupt->parm = irq->u.mchk.cr14; 1057 interrupt->parm64 = irq->u.mchk.mcic; 1058 break; 1059 case KVM_S390_INT_EXTERNAL_CALL: 1060 interrupt->parm = irq->u.extcall.code; 1061 break; 1062 case KVM_S390_INT_EMERGENCY: 1063 interrupt->parm = irq->u.emerg.code; 1064 break; 1065 case KVM_S390_SIGP_STOP: 1066 case KVM_S390_RESTART: 1067 break; /* These types have no parameters */ 1068 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 1069 interrupt->parm = irq->u.io.subchannel_id << 16; 1070 interrupt->parm |= irq->u.io.subchannel_nr; 1071 interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32; 1072 interrupt->parm64 |= irq->u.io.io_int_word; 1073 break; 1074 default: 1075 r = -EINVAL; 1076 break; 1077 } 1078 return r; 1079 } 1080 1081 static void inject_vcpu_irq_legacy(CPUState *cs, struct kvm_s390_irq *irq) 1082 { 1083 struct kvm_s390_interrupt kvmint = {}; 1084 int r; 1085 1086 r = s390_kvm_irq_to_interrupt(irq, &kvmint); 1087 if (r < 0) { 1088 fprintf(stderr, "%s called with bogus interrupt\n", __func__); 1089 exit(1); 1090 } 1091 1092 r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); 1093 if (r < 0) { 1094 fprintf(stderr, "KVM failed to inject interrupt\n"); 1095 exit(1); 1096 } 1097 } 1098 1099 void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq) 1100 { 1101 CPUState *cs = CPU(cpu); 1102 int r; 1103 1104 if (cap_s390_irq) { 1105 r = kvm_vcpu_ioctl(cs, KVM_S390_IRQ, irq); 1106 if (!r) { 1107 return; 1108 } 1109 error_report("KVM failed to inject interrupt %llx", irq->type); 1110 exit(1); 1111 } 1112 1113 inject_vcpu_irq_legacy(cs, irq); 1114 } 1115 1116 void kvm_s390_floating_interrupt_legacy(struct kvm_s390_irq *irq) 1117 { 1118 struct kvm_s390_interrupt kvmint = {}; 1119 int r; 1120 1121 r = s390_kvm_irq_to_interrupt(irq, &kvmint); 1122 if (r < 0) { 1123 fprintf(stderr, "%s called with bogus interrupt\n", __func__); 1124 exit(1); 1125 } 1126 1127 r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint); 1128 if (r < 0) { 1129 fprintf(stderr, "KVM failed to inject interrupt\n"); 1130 exit(1); 1131 } 1132 } 1133 1134 void kvm_s390_program_interrupt(S390CPU *cpu, uint16_t code) 1135 { 1136 struct kvm_s390_irq irq = { 1137 .type = KVM_S390_PROGRAM_INT, 1138 .u.pgm.code = code, 1139 }; 1140 qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n", 1141 cpu->env.psw.addr); 1142 kvm_s390_vcpu_interrupt(cpu, &irq); 1143 } 1144 1145 void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code) 1146 { 1147 struct kvm_s390_irq irq = { 1148 .type = KVM_S390_PROGRAM_INT, 1149 .u.pgm.code = code, 1150 .u.pgm.trans_exc_code = te_code, 1151 .u.pgm.exc_access_id = te_code & 3, 1152 }; 1153 1154 kvm_s390_vcpu_interrupt(cpu, &irq); 1155 } 1156 1157 static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, 1158 uint16_t ipbh0) 1159 { 1160 CPUS390XState *env = &cpu->env; 1161 uint64_t sccb; 1162 uint32_t code; 1163 int r; 1164 1165 sccb = env->regs[ipbh0 & 0xf]; 1166 code = env->regs[(ipbh0 & 0xf0) >> 4]; 1167 1168 switch (run->s390_sieic.icptcode) { 1169 case ICPT_PV_INSTR_NOTIFICATION: 1170 g_assert(s390_is_pv()); 1171 /* The notification intercepts are currently handled by KVM */ 1172 error_report("unexpected SCLP PV notification"); 1173 exit(1); 1174 break; 1175 case ICPT_PV_INSTR: 1176 g_assert(s390_is_pv()); 1177 sclp_service_call_protected(cpu, sccb, code); 1178 /* Setting the CC is done by the Ultravisor. */ 1179 break; 1180 case ICPT_INSTRUCTION: 1181 g_assert(!s390_is_pv()); 1182 r = sclp_service_call(cpu, sccb, code); 1183 if (r < 0) { 1184 kvm_s390_program_interrupt(cpu, -r); 1185 return; 1186 } 1187 setcc(cpu, r); 1188 } 1189 } 1190 1191 static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) 1192 { 1193 CPUS390XState *env = &cpu->env; 1194 int rc = 0; 1195 uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; 1196 1197 switch (ipa1) { 1198 case PRIV_B2_XSCH: 1199 ioinst_handle_xsch(cpu, env->regs[1], RA_IGNORED); 1200 break; 1201 case PRIV_B2_CSCH: 1202 ioinst_handle_csch(cpu, env->regs[1], RA_IGNORED); 1203 break; 1204 case PRIV_B2_HSCH: 1205 ioinst_handle_hsch(cpu, env->regs[1], RA_IGNORED); 1206 break; 1207 case PRIV_B2_MSCH: 1208 ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED); 1209 break; 1210 case PRIV_B2_SSCH: 1211 ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED); 1212 break; 1213 case PRIV_B2_STCRW: 1214 ioinst_handle_stcrw(cpu, run->s390_sieic.ipb, RA_IGNORED); 1215 break; 1216 case PRIV_B2_STSCH: 1217 ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED); 1218 break; 1219 case PRIV_B2_TSCH: 1220 /* We should only get tsch via KVM_EXIT_S390_TSCH. */ 1221 fprintf(stderr, "Spurious tsch intercept\n"); 1222 break; 1223 case PRIV_B2_CHSC: 1224 ioinst_handle_chsc(cpu, run->s390_sieic.ipb, RA_IGNORED); 1225 break; 1226 case PRIV_B2_TPI: 1227 /* This should have been handled by kvm already. */ 1228 fprintf(stderr, "Spurious tpi intercept\n"); 1229 break; 1230 case PRIV_B2_SCHM: 1231 ioinst_handle_schm(cpu, env->regs[1], env->regs[2], 1232 run->s390_sieic.ipb, RA_IGNORED); 1233 break; 1234 case PRIV_B2_RSCH: 1235 ioinst_handle_rsch(cpu, env->regs[1], RA_IGNORED); 1236 break; 1237 case PRIV_B2_RCHP: 1238 ioinst_handle_rchp(cpu, env->regs[1], RA_IGNORED); 1239 break; 1240 case PRIV_B2_STCPS: 1241 /* We do not provide this instruction, it is suppressed. */ 1242 break; 1243 case PRIV_B2_SAL: 1244 ioinst_handle_sal(cpu, env->regs[1], RA_IGNORED); 1245 break; 1246 case PRIV_B2_SIGA: 1247 /* Not provided, set CC = 3 for subchannel not operational */ 1248 setcc(cpu, 3); 1249 break; 1250 case PRIV_B2_SCLP_CALL: 1251 kvm_sclp_service_call(cpu, run, ipbh0); 1252 break; 1253 default: 1254 rc = -1; 1255 trace_kvm_insn_unhandled_priv(ipa1); 1256 break; 1257 } 1258 1259 return rc; 1260 } 1261 1262 static uint64_t get_base_disp_rxy(S390CPU *cpu, struct kvm_run *run, 1263 uint8_t *ar) 1264 { 1265 CPUS390XState *env = &cpu->env; 1266 uint32_t x2 = (run->s390_sieic.ipa & 0x000f); 1267 uint32_t base2 = run->s390_sieic.ipb >> 28; 1268 uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) + 1269 ((run->s390_sieic.ipb & 0xff00) << 4); 1270 1271 if (disp2 & 0x80000) { 1272 disp2 += 0xfff00000; 1273 } 1274 if (ar) { 1275 *ar = base2; 1276 } 1277 1278 return (base2 ? env->regs[base2] : 0) + 1279 (x2 ? env->regs[x2] : 0) + (long)(int)disp2; 1280 } 1281 1282 static uint64_t get_base_disp_rsy(S390CPU *cpu, struct kvm_run *run, 1283 uint8_t *ar) 1284 { 1285 CPUS390XState *env = &cpu->env; 1286 uint32_t base2 = run->s390_sieic.ipb >> 28; 1287 uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) + 1288 ((run->s390_sieic.ipb & 0xff00) << 4); 1289 1290 if (disp2 & 0x80000) { 1291 disp2 += 0xfff00000; 1292 } 1293 if (ar) { 1294 *ar = base2; 1295 } 1296 1297 return (base2 ? env->regs[base2] : 0) + (long)(int)disp2; 1298 } 1299 1300 static int kvm_clp_service_call(S390CPU *cpu, struct kvm_run *run) 1301 { 1302 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1303 1304 if (s390_has_feat(S390_FEAT_ZPCI)) { 1305 return clp_service_call(cpu, r2, RA_IGNORED); 1306 } else { 1307 return -1; 1308 } 1309 } 1310 1311 static int kvm_pcilg_service_call(S390CPU *cpu, struct kvm_run *run) 1312 { 1313 uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20; 1314 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1315 1316 if (s390_has_feat(S390_FEAT_ZPCI)) { 1317 return pcilg_service_call(cpu, r1, r2, RA_IGNORED); 1318 } else { 1319 return -1; 1320 } 1321 } 1322 1323 static int kvm_pcistg_service_call(S390CPU *cpu, struct kvm_run *run) 1324 { 1325 uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20; 1326 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1327 1328 if (s390_has_feat(S390_FEAT_ZPCI)) { 1329 return pcistg_service_call(cpu, r1, r2, RA_IGNORED); 1330 } else { 1331 return -1; 1332 } 1333 } 1334 1335 static int kvm_stpcifc_service_call(S390CPU *cpu, struct kvm_run *run) 1336 { 1337 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1338 uint64_t fiba; 1339 uint8_t ar; 1340 1341 if (s390_has_feat(S390_FEAT_ZPCI)) { 1342 fiba = get_base_disp_rxy(cpu, run, &ar); 1343 1344 return stpcifc_service_call(cpu, r1, fiba, ar, RA_IGNORED); 1345 } else { 1346 return -1; 1347 } 1348 } 1349 1350 static int kvm_sic_service_call(S390CPU *cpu, struct kvm_run *run) 1351 { 1352 CPUS390XState *env = &cpu->env; 1353 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1354 uint8_t r3 = run->s390_sieic.ipa & 0x000f; 1355 uint8_t isc; 1356 uint16_t mode; 1357 int r; 1358 1359 mode = env->regs[r1] & 0xffff; 1360 isc = (env->regs[r3] >> 27) & 0x7; 1361 r = css_do_sic(cpu, isc, mode); 1362 if (r) { 1363 kvm_s390_program_interrupt(cpu, -r); 1364 } 1365 1366 return 0; 1367 } 1368 1369 static int kvm_rpcit_service_call(S390CPU *cpu, struct kvm_run *run) 1370 { 1371 uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20; 1372 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1373 1374 if (s390_has_feat(S390_FEAT_ZPCI)) { 1375 return rpcit_service_call(cpu, r1, r2, RA_IGNORED); 1376 } else { 1377 return -1; 1378 } 1379 } 1380 1381 static int kvm_pcistb_service_call(S390CPU *cpu, struct kvm_run *run) 1382 { 1383 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1384 uint8_t r3 = run->s390_sieic.ipa & 0x000f; 1385 uint64_t gaddr; 1386 uint8_t ar; 1387 1388 if (s390_has_feat(S390_FEAT_ZPCI)) { 1389 gaddr = get_base_disp_rsy(cpu, run, &ar); 1390 1391 return pcistb_service_call(cpu, r1, r3, gaddr, ar, RA_IGNORED); 1392 } else { 1393 return -1; 1394 } 1395 } 1396 1397 static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run) 1398 { 1399 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1400 uint64_t fiba; 1401 uint8_t ar; 1402 1403 if (s390_has_feat(S390_FEAT_ZPCI)) { 1404 fiba = get_base_disp_rxy(cpu, run, &ar); 1405 1406 return mpcifc_service_call(cpu, r1, fiba, ar, RA_IGNORED); 1407 } else { 1408 return -1; 1409 } 1410 } 1411 1412 static void kvm_handle_ptf(S390CPU *cpu, struct kvm_run *run) 1413 { 1414 uint8_t r1 = (run->s390_sieic.ipb >> 20) & 0x0f; 1415 1416 s390_handle_ptf(cpu, r1, RA_IGNORED); 1417 } 1418 1419 static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) 1420 { 1421 int r = 0; 1422 1423 switch (ipa1) { 1424 case PRIV_B9_CLP: 1425 r = kvm_clp_service_call(cpu, run); 1426 break; 1427 case PRIV_B9_PCISTG: 1428 r = kvm_pcistg_service_call(cpu, run); 1429 break; 1430 case PRIV_B9_PCILG: 1431 r = kvm_pcilg_service_call(cpu, run); 1432 break; 1433 case PRIV_B9_RPCIT: 1434 r = kvm_rpcit_service_call(cpu, run); 1435 break; 1436 case PRIV_B9_PTF: 1437 kvm_handle_ptf(cpu, run); 1438 break; 1439 case PRIV_B9_EQBS: 1440 /* just inject exception */ 1441 r = -1; 1442 break; 1443 default: 1444 r = -1; 1445 trace_kvm_insn_unhandled_priv(ipa1); 1446 break; 1447 } 1448 1449 return r; 1450 } 1451 1452 static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl) 1453 { 1454 int r = 0; 1455 1456 switch (ipbl) { 1457 case PRIV_EB_PCISTB: 1458 r = kvm_pcistb_service_call(cpu, run); 1459 break; 1460 case PRIV_EB_SIC: 1461 r = kvm_sic_service_call(cpu, run); 1462 break; 1463 case PRIV_EB_SQBS: 1464 /* just inject exception */ 1465 r = -1; 1466 break; 1467 default: 1468 r = -1; 1469 trace_kvm_insn_unhandled_priv(ipbl); 1470 break; 1471 } 1472 1473 return r; 1474 } 1475 1476 static int handle_e3(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl) 1477 { 1478 int r = 0; 1479 1480 switch (ipbl) { 1481 case PRIV_E3_MPCIFC: 1482 r = kvm_mpcifc_service_call(cpu, run); 1483 break; 1484 case PRIV_E3_STPCIFC: 1485 r = kvm_stpcifc_service_call(cpu, run); 1486 break; 1487 default: 1488 r = -1; 1489 trace_kvm_insn_unhandled_priv(ipbl); 1490 break; 1491 } 1492 1493 return r; 1494 } 1495 1496 static int handle_hypercall(S390CPU *cpu, struct kvm_run *run) 1497 { 1498 CPUS390XState *env = &cpu->env; 1499 int ret; 1500 1501 ret = s390_virtio_hypercall(env); 1502 if (ret == -EINVAL) { 1503 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1504 return 0; 1505 } 1506 1507 return ret; 1508 } 1509 1510 static void kvm_handle_diag_288(S390CPU *cpu, struct kvm_run *run) 1511 { 1512 uint64_t r1, r3; 1513 int rc; 1514 1515 r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1516 r3 = run->s390_sieic.ipa & 0x000f; 1517 rc = handle_diag_288(&cpu->env, r1, r3); 1518 if (rc) { 1519 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1520 } 1521 } 1522 1523 static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run) 1524 { 1525 uint64_t r1, r3; 1526 1527 r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1528 r3 = run->s390_sieic.ipa & 0x000f; 1529 handle_diag_308(&cpu->env, r1, r3, RA_IGNORED); 1530 } 1531 1532 static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run) 1533 { 1534 CPUS390XState *env = &cpu->env; 1535 unsigned long pc; 1536 1537 pc = env->psw.addr - sw_bp_ilen; 1538 if (kvm_find_sw_breakpoint(CPU(cpu), pc)) { 1539 env->psw.addr = pc; 1540 return EXCP_DEBUG; 1541 } 1542 1543 return -ENOENT; 1544 } 1545 1546 void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info) 1547 { 1548 CPUS390XState *env = &S390_CPU(cs)->env; 1549 1550 /* Feat bit is set only if KVM supports sync for diag318 */ 1551 if (s390_has_feat(S390_FEAT_DIAG_318)) { 1552 env->diag318_info = diag318_info; 1553 cs->kvm_run->s.regs.diag318 = diag318_info; 1554 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318; 1555 /* 1556 * diag 318 info is zeroed during a clear reset and 1557 * diag 308 IPL subcodes. 1558 */ 1559 } 1560 } 1561 1562 static void handle_diag_318(S390CPU *cpu, struct kvm_run *run) 1563 { 1564 uint64_t reg = (run->s390_sieic.ipa & 0x00f0) >> 4; 1565 uint64_t diag318_info = run->s.regs.gprs[reg]; 1566 CPUState *t; 1567 1568 /* 1569 * DIAG 318 can only be enabled with KVM support. As such, let's 1570 * ensure a guest cannot execute this instruction erroneously. 1571 */ 1572 if (!s390_has_feat(S390_FEAT_DIAG_318)) { 1573 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1574 return; 1575 } 1576 1577 CPU_FOREACH(t) { 1578 run_on_cpu(t, s390_do_cpu_set_diag318, 1579 RUN_ON_CPU_HOST_ULONG(diag318_info)); 1580 } 1581 } 1582 1583 #define DIAG_KVM_CODE_MASK 0x000000000000ffff 1584 1585 static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) 1586 { 1587 int r = 0; 1588 uint16_t func_code; 1589 1590 /* 1591 * For any diagnose call we support, bits 48-63 of the resulting 1592 * address specify the function code; the remainder is ignored. 1593 */ 1594 func_code = decode_basedisp_rs(&cpu->env, ipb, NULL) & DIAG_KVM_CODE_MASK; 1595 switch (func_code) { 1596 case DIAG_TIMEREVENT: 1597 kvm_handle_diag_288(cpu, run); 1598 break; 1599 case DIAG_IPL: 1600 kvm_handle_diag_308(cpu, run); 1601 break; 1602 case DIAG_SET_CONTROL_PROGRAM_CODES: 1603 handle_diag_318(cpu, run); 1604 break; 1605 case DIAG_KVM_HYPERCALL: 1606 r = handle_hypercall(cpu, run); 1607 break; 1608 case DIAG_KVM_BREAKPOINT: 1609 r = handle_sw_breakpoint(cpu, run); 1610 break; 1611 default: 1612 trace_kvm_insn_diag(func_code); 1613 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1614 break; 1615 } 1616 1617 return r; 1618 } 1619 1620 static int kvm_s390_handle_sigp(S390CPU *cpu, uint8_t ipa1, uint32_t ipb) 1621 { 1622 CPUS390XState *env = &cpu->env; 1623 const uint8_t r1 = ipa1 >> 4; 1624 const uint8_t r3 = ipa1 & 0x0f; 1625 int ret; 1626 uint8_t order; 1627 1628 /* get order code */ 1629 order = decode_basedisp_rs(env, ipb, NULL) & SIGP_ORDER_MASK; 1630 1631 ret = handle_sigp(env, order, r1, r3); 1632 setcc(cpu, ret); 1633 return 0; 1634 } 1635 1636 static int handle_instruction(S390CPU *cpu, struct kvm_run *run) 1637 { 1638 unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); 1639 uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff; 1640 int r = -1; 1641 1642 trace_kvm_insn(run->s390_sieic.ipa, run->s390_sieic.ipb); 1643 switch (ipa0) { 1644 case IPA0_B2: 1645 r = handle_b2(cpu, run, ipa1); 1646 break; 1647 case IPA0_B9: 1648 r = handle_b9(cpu, run, ipa1); 1649 break; 1650 case IPA0_EB: 1651 r = handle_eb(cpu, run, run->s390_sieic.ipb & 0xff); 1652 break; 1653 case IPA0_E3: 1654 r = handle_e3(cpu, run, run->s390_sieic.ipb & 0xff); 1655 break; 1656 case IPA0_DIAG: 1657 r = handle_diag(cpu, run, run->s390_sieic.ipb); 1658 break; 1659 case IPA0_SIGP: 1660 r = kvm_s390_handle_sigp(cpu, ipa1, run->s390_sieic.ipb); 1661 break; 1662 } 1663 1664 if (r < 0) { 1665 r = 0; 1666 kvm_s390_program_interrupt(cpu, PGM_OPERATION); 1667 } 1668 1669 return r; 1670 } 1671 1672 static void unmanageable_intercept(S390CPU *cpu, S390CrashReason reason, 1673 int pswoffset) 1674 { 1675 CPUState *cs = CPU(cpu); 1676 1677 s390_cpu_halt(cpu); 1678 cpu->env.crash_reason = reason; 1679 qemu_system_guest_panicked(cpu_get_crash_info(cs)); 1680 } 1681 1682 /* try to detect pgm check loops */ 1683 static int handle_oper_loop(S390CPU *cpu, struct kvm_run *run) 1684 { 1685 CPUState *cs = CPU(cpu); 1686 PSW oldpsw, newpsw; 1687 1688 newpsw.mask = ldq_phys(cs->as, cpu->env.psa + 1689 offsetof(LowCore, program_new_psw)); 1690 newpsw.addr = ldq_phys(cs->as, cpu->env.psa + 1691 offsetof(LowCore, program_new_psw) + 8); 1692 oldpsw.mask = run->psw_mask; 1693 oldpsw.addr = run->psw_addr; 1694 /* 1695 * Avoid endless loops of operation exceptions, if the pgm new 1696 * PSW will cause a new operation exception. 1697 * The heuristic checks if the pgm new psw is within 6 bytes before 1698 * the faulting psw address (with same DAT, AS settings) and the 1699 * new psw is not a wait psw and the fault was not triggered by 1700 * problem state. In that case go into crashed state. 1701 */ 1702 1703 if (oldpsw.addr - newpsw.addr <= 6 && 1704 !(newpsw.mask & PSW_MASK_WAIT) && 1705 !(oldpsw.mask & PSW_MASK_PSTATE) && 1706 (newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) && 1707 (newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT)) { 1708 unmanageable_intercept(cpu, S390_CRASH_REASON_OPINT_LOOP, 1709 offsetof(LowCore, program_new_psw)); 1710 return EXCP_HALTED; 1711 } 1712 return 0; 1713 } 1714 1715 static int handle_intercept(S390CPU *cpu) 1716 { 1717 CPUState *cs = CPU(cpu); 1718 struct kvm_run *run = cs->kvm_run; 1719 int icpt_code = run->s390_sieic.icptcode; 1720 int r = 0; 1721 1722 trace_kvm_intercept(icpt_code, (long)run->psw_addr); 1723 switch (icpt_code) { 1724 case ICPT_INSTRUCTION: 1725 case ICPT_PV_INSTR: 1726 case ICPT_PV_INSTR_NOTIFICATION: 1727 r = handle_instruction(cpu, run); 1728 break; 1729 case ICPT_PROGRAM: 1730 unmanageable_intercept(cpu, S390_CRASH_REASON_PGMINT_LOOP, 1731 offsetof(LowCore, program_new_psw)); 1732 r = EXCP_HALTED; 1733 break; 1734 case ICPT_EXT_INT: 1735 unmanageable_intercept(cpu, S390_CRASH_REASON_EXTINT_LOOP, 1736 offsetof(LowCore, external_new_psw)); 1737 r = EXCP_HALTED; 1738 break; 1739 case ICPT_WAITPSW: 1740 /* disabled wait, since enabled wait is handled in kernel */ 1741 s390_handle_wait(cpu); 1742 r = EXCP_HALTED; 1743 break; 1744 case ICPT_CPU_STOP: 1745 do_stop_interrupt(&cpu->env); 1746 r = EXCP_HALTED; 1747 break; 1748 case ICPT_OPEREXC: 1749 /* check for break points */ 1750 r = handle_sw_breakpoint(cpu, run); 1751 if (r == -ENOENT) { 1752 /* Then check for potential pgm check loops */ 1753 r = handle_oper_loop(cpu, run); 1754 if (r == 0) { 1755 kvm_s390_program_interrupt(cpu, PGM_OPERATION); 1756 } 1757 } 1758 break; 1759 case ICPT_SOFT_INTERCEPT: 1760 fprintf(stderr, "KVM unimplemented icpt SOFT\n"); 1761 exit(1); 1762 break; 1763 case ICPT_IO: 1764 fprintf(stderr, "KVM unimplemented icpt IO\n"); 1765 exit(1); 1766 break; 1767 default: 1768 fprintf(stderr, "Unknown intercept code: %d\n", icpt_code); 1769 exit(1); 1770 break; 1771 } 1772 1773 return r; 1774 } 1775 1776 static int handle_tsch(S390CPU *cpu) 1777 { 1778 CPUState *cs = CPU(cpu); 1779 struct kvm_run *run = cs->kvm_run; 1780 int ret; 1781 1782 ret = ioinst_handle_tsch(cpu, cpu->env.regs[1], run->s390_tsch.ipb, 1783 RA_IGNORED); 1784 if (ret < 0) { 1785 /* 1786 * Failure. 1787 * If an I/O interrupt had been dequeued, we have to reinject it. 1788 */ 1789 if (run->s390_tsch.dequeued) { 1790 s390_io_interrupt(run->s390_tsch.subchannel_id, 1791 run->s390_tsch.subchannel_nr, 1792 run->s390_tsch.io_int_parm, 1793 run->s390_tsch.io_int_word); 1794 } 1795 ret = 0; 1796 } 1797 return ret; 1798 } 1799 1800 static void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, uint8_t ar) 1801 { 1802 const MachineState *ms = MACHINE(qdev_get_machine()); 1803 uint16_t conf_cpus = 0, reserved_cpus = 0; 1804 SysIB_322 sysib; 1805 int del, i; 1806 1807 if (s390_is_pv()) { 1808 s390_cpu_pv_mem_read(cpu, 0, &sysib, sizeof(sysib)); 1809 } else if (s390_cpu_virt_mem_read(cpu, addr, ar, &sysib, sizeof(sysib))) { 1810 return; 1811 } 1812 /* Shift the stack of Extended Names to prepare for our own data */ 1813 memmove(&sysib.ext_names[1], &sysib.ext_names[0], 1814 sizeof(sysib.ext_names[0]) * (sysib.count - 1)); 1815 /* First virt level, that doesn't provide Ext Names delimits stack. It is 1816 * assumed it's not capable of managing Extended Names for lower levels. 1817 */ 1818 for (del = 1; del < sysib.count; del++) { 1819 if (!sysib.vm[del].ext_name_encoding || !sysib.ext_names[del][0]) { 1820 break; 1821 } 1822 } 1823 if (del < sysib.count) { 1824 memset(sysib.ext_names[del], 0, 1825 sizeof(sysib.ext_names[0]) * (sysib.count - del)); 1826 } 1827 1828 /* count the cpus and split them into configured and reserved ones */ 1829 for (i = 0; i < ms->possible_cpus->len; i++) { 1830 if (ms->possible_cpus->cpus[i].cpu) { 1831 conf_cpus++; 1832 } else { 1833 reserved_cpus++; 1834 } 1835 } 1836 sysib.vm[0].total_cpus = conf_cpus + reserved_cpus; 1837 sysib.vm[0].conf_cpus = conf_cpus; 1838 sysib.vm[0].reserved_cpus = reserved_cpus; 1839 1840 /* Insert short machine name in EBCDIC, padded with blanks */ 1841 if (qemu_name) { 1842 memset(sysib.vm[0].name, 0x40, sizeof(sysib.vm[0].name)); 1843 ebcdic_put(sysib.vm[0].name, qemu_name, MIN(sizeof(sysib.vm[0].name), 1844 strlen(qemu_name))); 1845 } 1846 sysib.vm[0].ext_name_encoding = 2; /* 2 = UTF-8 */ 1847 /* If hypervisor specifies zero Extended Name in STSI322 SYSIB, it's 1848 * considered by s390 as not capable of providing any Extended Name. 1849 * Therefore if no name was specified on qemu invocation, we go with the 1850 * same "KVMguest" default, which KVM has filled into short name field. 1851 */ 1852 strpadcpy((char *)sysib.ext_names[0], 1853 sizeof(sysib.ext_names[0]), 1854 qemu_name ?: "KVMguest", '\0'); 1855 1856 /* Insert UUID */ 1857 memcpy(sysib.vm[0].uuid, &qemu_uuid, sizeof(sysib.vm[0].uuid)); 1858 1859 if (s390_is_pv()) { 1860 s390_cpu_pv_mem_write(cpu, 0, &sysib, sizeof(sysib)); 1861 } else { 1862 s390_cpu_virt_mem_write(cpu, addr, ar, &sysib, sizeof(sysib)); 1863 } 1864 } 1865 1866 static int handle_stsi(S390CPU *cpu) 1867 { 1868 CPUState *cs = CPU(cpu); 1869 struct kvm_run *run = cs->kvm_run; 1870 1871 switch (run->s390_stsi.fc) { 1872 case 3: 1873 if (run->s390_stsi.sel1 != 2 || run->s390_stsi.sel2 != 2) { 1874 return 0; 1875 } 1876 insert_stsi_3_2_2(cpu, run->s390_stsi.addr, run->s390_stsi.ar); 1877 return 0; 1878 case 15: 1879 insert_stsi_15_1_x(cpu, run->s390_stsi.sel2, run->s390_stsi.addr, 1880 run->s390_stsi.ar, RA_IGNORED); 1881 return 0; 1882 default: 1883 return 0; 1884 } 1885 } 1886 1887 static int kvm_arch_handle_debug_exit(S390CPU *cpu) 1888 { 1889 CPUState *cs = CPU(cpu); 1890 struct kvm_run *run = cs->kvm_run; 1891 1892 int ret = 0; 1893 struct kvm_debug_exit_arch *arch_info = &run->debug.arch; 1894 1895 switch (arch_info->type) { 1896 case KVM_HW_WP_WRITE: 1897 if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { 1898 cs->watchpoint_hit = &hw_watchpoint; 1899 hw_watchpoint.vaddr = arch_info->addr; 1900 hw_watchpoint.flags = BP_MEM_WRITE; 1901 ret = EXCP_DEBUG; 1902 } 1903 break; 1904 case KVM_HW_BP: 1905 if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { 1906 ret = EXCP_DEBUG; 1907 } 1908 break; 1909 case KVM_SINGLESTEP: 1910 if (cs->singlestep_enabled) { 1911 ret = EXCP_DEBUG; 1912 } 1913 break; 1914 default: 1915 ret = -ENOSYS; 1916 } 1917 1918 return ret; 1919 } 1920 1921 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 1922 { 1923 S390CPU *cpu = S390_CPU(cs); 1924 int ret = 0; 1925 1926 bql_lock(); 1927 1928 kvm_cpu_synchronize_state(cs); 1929 1930 switch (run->exit_reason) { 1931 case KVM_EXIT_S390_SIEIC: 1932 ret = handle_intercept(cpu); 1933 break; 1934 case KVM_EXIT_S390_RESET: 1935 s390_ipl_reset_request(cs, S390_RESET_REIPL); 1936 break; 1937 case KVM_EXIT_S390_TSCH: 1938 ret = handle_tsch(cpu); 1939 break; 1940 case KVM_EXIT_S390_STSI: 1941 ret = handle_stsi(cpu); 1942 break; 1943 case KVM_EXIT_DEBUG: 1944 ret = kvm_arch_handle_debug_exit(cpu); 1945 break; 1946 default: 1947 fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); 1948 break; 1949 } 1950 bql_unlock(); 1951 1952 if (ret == 0) { 1953 ret = EXCP_INTERRUPT; 1954 } 1955 return ret; 1956 } 1957 1958 bool kvm_arch_stop_on_emulation_error(CPUState *cpu) 1959 { 1960 return true; 1961 } 1962 1963 void kvm_s390_enable_css_support(S390CPU *cpu) 1964 { 1965 int r; 1966 1967 /* Activate host kernel channel subsystem support. */ 1968 r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0); 1969 assert(r == 0); 1970 } 1971 1972 void kvm_arch_init_irq_routing(KVMState *s) 1973 { 1974 /* 1975 * Note that while irqchip capabilities generally imply that cpustates 1976 * are handled in-kernel, it is not true for s390 (yet); therefore, we 1977 * have to override the common code kvm_halt_in_kernel_allowed setting. 1978 */ 1979 if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { 1980 kvm_gsi_routing_allowed = true; 1981 kvm_halt_in_kernel_allowed = false; 1982 } 1983 } 1984 1985 int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch, 1986 int vq, bool assign) 1987 { 1988 struct kvm_ioeventfd kick = { 1989 .flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | 1990 KVM_IOEVENTFD_FLAG_DATAMATCH, 1991 .fd = event_notifier_get_fd(notifier), 1992 .datamatch = vq, 1993 .addr = sch, 1994 .len = 8, 1995 }; 1996 trace_kvm_assign_subch_ioeventfd(kick.fd, kick.addr, assign, 1997 kick.datamatch); 1998 if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) { 1999 return -ENOSYS; 2000 } 2001 if (!assign) { 2002 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; 2003 } 2004 return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); 2005 } 2006 2007 int kvm_s390_get_protected_dump(void) 2008 { 2009 return cap_protected_dump; 2010 } 2011 2012 int kvm_s390_get_ri(void) 2013 { 2014 return cap_ri; 2015 } 2016 2017 int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state) 2018 { 2019 struct kvm_mp_state mp_state = {}; 2020 int ret; 2021 2022 /* the kvm part might not have been initialized yet */ 2023 if (CPU(cpu)->kvm_state == NULL) { 2024 return 0; 2025 } 2026 2027 switch (cpu_state) { 2028 case S390_CPU_STATE_STOPPED: 2029 mp_state.mp_state = KVM_MP_STATE_STOPPED; 2030 break; 2031 case S390_CPU_STATE_CHECK_STOP: 2032 mp_state.mp_state = KVM_MP_STATE_CHECK_STOP; 2033 break; 2034 case S390_CPU_STATE_OPERATING: 2035 mp_state.mp_state = KVM_MP_STATE_OPERATING; 2036 break; 2037 case S390_CPU_STATE_LOAD: 2038 mp_state.mp_state = KVM_MP_STATE_LOAD; 2039 break; 2040 default: 2041 error_report("Requested CPU state is not a valid S390 CPU state: %u", 2042 cpu_state); 2043 exit(1); 2044 } 2045 2046 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); 2047 if (ret) { 2048 trace_kvm_failed_cpu_state_set(CPU(cpu)->cpu_index, cpu_state, 2049 strerror(-ret)); 2050 } 2051 2052 return ret; 2053 } 2054 2055 void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu) 2056 { 2057 unsigned int max_cpus = MACHINE(qdev_get_machine())->smp.max_cpus; 2058 struct kvm_s390_irq_state irq_state = { 2059 .buf = (uint64_t) cpu->irqstate, 2060 .len = VCPU_IRQ_BUF_SIZE(max_cpus), 2061 }; 2062 CPUState *cs = CPU(cpu); 2063 int32_t bytes; 2064 2065 if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) { 2066 return; 2067 } 2068 2069 bytes = kvm_vcpu_ioctl(cs, KVM_S390_GET_IRQ_STATE, &irq_state); 2070 if (bytes < 0) { 2071 cpu->irqstate_saved_size = 0; 2072 error_report("Migration of interrupt state failed"); 2073 return; 2074 } 2075 2076 cpu->irqstate_saved_size = bytes; 2077 } 2078 2079 int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu) 2080 { 2081 CPUState *cs = CPU(cpu); 2082 struct kvm_s390_irq_state irq_state = { 2083 .buf = (uint64_t) cpu->irqstate, 2084 .len = cpu->irqstate_saved_size, 2085 }; 2086 int r; 2087 2088 if (cpu->irqstate_saved_size == 0) { 2089 return 0; 2090 } 2091 2092 if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) { 2093 return -ENOSYS; 2094 } 2095 2096 r = kvm_vcpu_ioctl(cs, KVM_S390_SET_IRQ_STATE, &irq_state); 2097 if (r) { 2098 error_report("Setting interrupt state failed %d", r); 2099 } 2100 return r; 2101 } 2102 2103 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 2104 uint64_t address, uint32_t data, PCIDevice *dev) 2105 { 2106 S390PCIBusDevice *pbdev; 2107 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 2108 2109 if (!dev) { 2110 trace_kvm_msi_route_fixup("no pci device"); 2111 return -ENODEV; 2112 } 2113 2114 pbdev = s390_pci_find_dev_by_target(s390_get_phb(), DEVICE(dev)->id); 2115 if (!pbdev) { 2116 trace_kvm_msi_route_fixup("no zpci device"); 2117 return -ENODEV; 2118 } 2119 2120 route->type = KVM_IRQ_ROUTING_S390_ADAPTER; 2121 route->flags = 0; 2122 route->u.adapter.summary_addr = pbdev->routes.adapter.summary_addr; 2123 route->u.adapter.ind_addr = pbdev->routes.adapter.ind_addr; 2124 route->u.adapter.summary_offset = pbdev->routes.adapter.summary_offset; 2125 route->u.adapter.ind_offset = pbdev->routes.adapter.ind_offset + vec; 2126 route->u.adapter.adapter_id = pbdev->routes.adapter.adapter_id; 2127 return 0; 2128 } 2129 2130 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 2131 int vector, PCIDevice *dev) 2132 { 2133 return 0; 2134 } 2135 2136 int kvm_arch_release_virq_post(int virq) 2137 { 2138 return 0; 2139 } 2140 2141 int kvm_arch_msi_data_to_gsi(uint32_t data) 2142 { 2143 abort(); 2144 } 2145 2146 static int query_cpu_subfunc(S390FeatBitmap features) 2147 { 2148 struct kvm_s390_vm_cpu_subfunc prop = {}; 2149 struct kvm_device_attr attr = { 2150 .group = KVM_S390_VM_CPU_MODEL, 2151 .attr = KVM_S390_VM_CPU_MACHINE_SUBFUNC, 2152 .addr = (uint64_t) &prop, 2153 }; 2154 int rc; 2155 2156 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2157 if (rc) { 2158 return rc; 2159 } 2160 2161 /* 2162 * We're going to add all subfunctions now, if the corresponding feature 2163 * is available that unlocks the query functions. 2164 */ 2165 s390_add_from_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo); 2166 if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) { 2167 s390_add_from_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff); 2168 } 2169 if (test_bit(S390_FEAT_MSA, features)) { 2170 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac); 2171 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc); 2172 s390_add_from_feat_block(features, S390_FEAT_TYPE_KM, prop.km); 2173 s390_add_from_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd); 2174 s390_add_from_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd); 2175 } 2176 if (test_bit(S390_FEAT_MSA_EXT_3, features)) { 2177 s390_add_from_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo); 2178 } 2179 if (test_bit(S390_FEAT_MSA_EXT_4, features)) { 2180 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr); 2181 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf); 2182 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo); 2183 s390_add_from_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc); 2184 } 2185 if (test_bit(S390_FEAT_MSA_EXT_5, features)) { 2186 s390_add_from_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno); 2187 } 2188 if (test_bit(S390_FEAT_MSA_EXT_8, features)) { 2189 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMA, prop.kma); 2190 } 2191 if (test_bit(S390_FEAT_MSA_EXT_9, features)) { 2192 s390_add_from_feat_block(features, S390_FEAT_TYPE_KDSA, prop.kdsa); 2193 } 2194 if (test_bit(S390_FEAT_ESORT_BASE, features)) { 2195 s390_add_from_feat_block(features, S390_FEAT_TYPE_SORTL, prop.sortl); 2196 } 2197 if (test_bit(S390_FEAT_DEFLATE_BASE, features)) { 2198 s390_add_from_feat_block(features, S390_FEAT_TYPE_DFLTCC, prop.dfltcc); 2199 } 2200 return 0; 2201 } 2202 2203 static int configure_cpu_subfunc(const S390FeatBitmap features) 2204 { 2205 struct kvm_s390_vm_cpu_subfunc prop = {}; 2206 struct kvm_device_attr attr = { 2207 .group = KVM_S390_VM_CPU_MODEL, 2208 .attr = KVM_S390_VM_CPU_PROCESSOR_SUBFUNC, 2209 .addr = (uint64_t) &prop, 2210 }; 2211 2212 if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2213 KVM_S390_VM_CPU_PROCESSOR_SUBFUNC)) { 2214 /* hardware support might be missing, IBC will handle most of this */ 2215 return 0; 2216 } 2217 2218 s390_fill_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo); 2219 if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) { 2220 s390_fill_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff); 2221 } 2222 if (test_bit(S390_FEAT_MSA, features)) { 2223 s390_fill_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac); 2224 s390_fill_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc); 2225 s390_fill_feat_block(features, S390_FEAT_TYPE_KM, prop.km); 2226 s390_fill_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd); 2227 s390_fill_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd); 2228 } 2229 if (test_bit(S390_FEAT_MSA_EXT_3, features)) { 2230 s390_fill_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo); 2231 } 2232 if (test_bit(S390_FEAT_MSA_EXT_4, features)) { 2233 s390_fill_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr); 2234 s390_fill_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf); 2235 s390_fill_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo); 2236 s390_fill_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc); 2237 } 2238 if (test_bit(S390_FEAT_MSA_EXT_5, features)) { 2239 s390_fill_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno); 2240 } 2241 if (test_bit(S390_FEAT_MSA_EXT_8, features)) { 2242 s390_fill_feat_block(features, S390_FEAT_TYPE_KMA, prop.kma); 2243 } 2244 if (test_bit(S390_FEAT_MSA_EXT_9, features)) { 2245 s390_fill_feat_block(features, S390_FEAT_TYPE_KDSA, prop.kdsa); 2246 } 2247 if (test_bit(S390_FEAT_ESORT_BASE, features)) { 2248 s390_fill_feat_block(features, S390_FEAT_TYPE_SORTL, prop.sortl); 2249 } 2250 if (test_bit(S390_FEAT_DEFLATE_BASE, features)) { 2251 s390_fill_feat_block(features, S390_FEAT_TYPE_DFLTCC, prop.dfltcc); 2252 } 2253 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 2254 } 2255 2256 static bool ap_available(void) 2257 { 2258 return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, 2259 KVM_S390_VM_CRYPTO_ENABLE_APIE); 2260 } 2261 2262 static bool ap_enabled(const S390FeatBitmap features) 2263 { 2264 return test_bit(S390_FEAT_AP, features); 2265 } 2266 2267 static bool uv_feat_supported(void) 2268 { 2269 return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2270 KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST); 2271 } 2272 2273 static int query_uv_feat_guest(S390FeatBitmap features) 2274 { 2275 struct kvm_s390_vm_cpu_uv_feat prop = {}; 2276 struct kvm_device_attr attr = { 2277 .group = KVM_S390_VM_CPU_MODEL, 2278 .attr = KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST, 2279 .addr = (uint64_t) &prop, 2280 }; 2281 int rc; 2282 2283 /* AP support check is currently the only user of the UV feature test */ 2284 if (!(uv_feat_supported() && ap_available())) { 2285 return 0; 2286 } 2287 2288 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2289 if (rc) { 2290 return rc; 2291 } 2292 2293 if (prop.ap) { 2294 set_bit(S390_FEAT_UV_FEAT_AP, features); 2295 } 2296 if (prop.ap_intr) { 2297 set_bit(S390_FEAT_UV_FEAT_AP_INTR, features); 2298 } 2299 2300 return 0; 2301 } 2302 2303 static int kvm_to_feat[][2] = { 2304 { KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP }, 2305 { KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 }, 2306 { KVM_S390_VM_CPU_FEAT_64BSCAO , S390_FEAT_SIE_64BSCAO }, 2307 { KVM_S390_VM_CPU_FEAT_SIIF, S390_FEAT_SIE_SIIF }, 2308 { KVM_S390_VM_CPU_FEAT_GPERE, S390_FEAT_SIE_GPERE }, 2309 { KVM_S390_VM_CPU_FEAT_GSLS, S390_FEAT_SIE_GSLS }, 2310 { KVM_S390_VM_CPU_FEAT_IB, S390_FEAT_SIE_IB }, 2311 { KVM_S390_VM_CPU_FEAT_CEI, S390_FEAT_SIE_CEI }, 2312 { KVM_S390_VM_CPU_FEAT_IBS, S390_FEAT_SIE_IBS }, 2313 { KVM_S390_VM_CPU_FEAT_SKEY, S390_FEAT_SIE_SKEY }, 2314 { KVM_S390_VM_CPU_FEAT_CMMA, S390_FEAT_SIE_CMMA }, 2315 { KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI}, 2316 { KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF}, 2317 { KVM_S390_VM_CPU_FEAT_KSS, S390_FEAT_SIE_KSS}, 2318 }; 2319 2320 static int query_cpu_feat(S390FeatBitmap features) 2321 { 2322 struct kvm_s390_vm_cpu_feat prop = {}; 2323 struct kvm_device_attr attr = { 2324 .group = KVM_S390_VM_CPU_MODEL, 2325 .attr = KVM_S390_VM_CPU_MACHINE_FEAT, 2326 .addr = (uint64_t) &prop, 2327 }; 2328 int rc; 2329 int i; 2330 2331 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2332 if (rc) { 2333 return rc; 2334 } 2335 2336 for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) { 2337 if (test_be_bit(kvm_to_feat[i][0], (uint8_t *) prop.feat)) { 2338 set_bit(kvm_to_feat[i][1], features); 2339 } 2340 } 2341 return 0; 2342 } 2343 2344 static int configure_cpu_feat(const S390FeatBitmap features) 2345 { 2346 struct kvm_s390_vm_cpu_feat prop = {}; 2347 struct kvm_device_attr attr = { 2348 .group = KVM_S390_VM_CPU_MODEL, 2349 .attr = KVM_S390_VM_CPU_PROCESSOR_FEAT, 2350 .addr = (uint64_t) &prop, 2351 }; 2352 int i; 2353 2354 for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) { 2355 if (test_bit(kvm_to_feat[i][1], features)) { 2356 set_be_bit(kvm_to_feat[i][0], (uint8_t *) prop.feat); 2357 } 2358 } 2359 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 2360 } 2361 2362 bool kvm_s390_cpu_models_supported(void) 2363 { 2364 if (!cpu_model_allowed()) { 2365 /* compatibility machines interfere with the cpu model */ 2366 return false; 2367 } 2368 return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2369 KVM_S390_VM_CPU_MACHINE) && 2370 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2371 KVM_S390_VM_CPU_PROCESSOR) && 2372 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2373 KVM_S390_VM_CPU_MACHINE_FEAT) && 2374 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2375 KVM_S390_VM_CPU_PROCESSOR_FEAT) && 2376 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2377 KVM_S390_VM_CPU_MACHINE_SUBFUNC); 2378 } 2379 2380 void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp) 2381 { 2382 struct kvm_s390_vm_cpu_machine prop = {}; 2383 struct kvm_device_attr attr = { 2384 .group = KVM_S390_VM_CPU_MODEL, 2385 .attr = KVM_S390_VM_CPU_MACHINE, 2386 .addr = (uint64_t) &prop, 2387 }; 2388 uint16_t unblocked_ibc = 0, cpu_type = 0; 2389 int rc; 2390 2391 memset(model, 0, sizeof(*model)); 2392 2393 if (!kvm_s390_cpu_models_supported()) { 2394 error_setg(errp, "KVM doesn't support CPU models"); 2395 return; 2396 } 2397 2398 /* query the basic cpu model properties */ 2399 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2400 if (rc) { 2401 error_setg(errp, "KVM: Error querying host CPU model: %d", rc); 2402 return; 2403 } 2404 2405 cpu_type = cpuid_type(prop.cpuid); 2406 if (has_ibc(prop.ibc)) { 2407 model->lowest_ibc = lowest_ibc(prop.ibc); 2408 unblocked_ibc = unblocked_ibc(prop.ibc); 2409 } 2410 model->cpu_id = cpuid_id(prop.cpuid); 2411 model->cpu_id_format = cpuid_format(prop.cpuid); 2412 model->cpu_ver = 0xff; 2413 2414 /* get supported cpu features indicated via STFL(E) */ 2415 s390_add_from_feat_block(model->features, S390_FEAT_TYPE_STFL, 2416 (uint8_t *) prop.fac_mask); 2417 /* dat-enhancement facility 2 has no bit but was introduced with stfle */ 2418 if (test_bit(S390_FEAT_STFLE, model->features)) { 2419 set_bit(S390_FEAT_DAT_ENH_2, model->features); 2420 } 2421 /* get supported cpu features indicated e.g. via SCLP */ 2422 rc = query_cpu_feat(model->features); 2423 if (rc) { 2424 error_setg(errp, "KVM: Error querying CPU features: %d", rc); 2425 return; 2426 } 2427 /* get supported cpu subfunctions indicated via query / test bit */ 2428 rc = query_cpu_subfunc(model->features); 2429 if (rc) { 2430 error_setg(errp, "KVM: Error querying CPU subfunctions: %d", rc); 2431 return; 2432 } 2433 2434 /* PTFF subfunctions might be indicated although kernel support missing */ 2435 if (!test_bit(S390_FEAT_MULTIPLE_EPOCH, model->features)) { 2436 clear_bit(S390_FEAT_PTFF_QSIE, model->features); 2437 clear_bit(S390_FEAT_PTFF_QTOUE, model->features); 2438 clear_bit(S390_FEAT_PTFF_STOE, model->features); 2439 clear_bit(S390_FEAT_PTFF_STOUE, model->features); 2440 } 2441 2442 /* with cpu model support, CMM is only indicated if really available */ 2443 if (kvm_s390_cmma_available()) { 2444 set_bit(S390_FEAT_CMM, model->features); 2445 } else { 2446 /* no cmm -> no cmm nt */ 2447 clear_bit(S390_FEAT_CMM_NT, model->features); 2448 } 2449 2450 /* bpb needs kernel support for migration, VSIE and reset */ 2451 if (!kvm_check_extension(kvm_state, KVM_CAP_S390_BPB)) { 2452 clear_bit(S390_FEAT_BPB, model->features); 2453 } 2454 2455 /* 2456 * If we have support for protected virtualization, indicate 2457 * the protected virtualization IPL unpack facility. 2458 */ 2459 if (cap_protected) { 2460 set_bit(S390_FEAT_UNPACK, model->features); 2461 } 2462 2463 /* 2464 * If we have kernel support for CPU Topology indicate the 2465 * configuration-topology facility. 2466 */ 2467 if (kvm_check_extension(kvm_state, KVM_CAP_S390_CPU_TOPOLOGY)) { 2468 set_bit(S390_FEAT_CONFIGURATION_TOPOLOGY, model->features); 2469 } 2470 2471 /* We emulate a zPCI bus and AEN, therefore we don't need HW support */ 2472 set_bit(S390_FEAT_ZPCI, model->features); 2473 set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features); 2474 2475 if (s390_known_cpu_type(cpu_type)) { 2476 /* we want the exact model, even if some features are missing */ 2477 model->def = s390_find_cpu_def(cpu_type, ibc_gen(unblocked_ibc), 2478 ibc_ec_ga(unblocked_ibc), NULL); 2479 } else { 2480 /* model unknown, e.g. too new - search using features */ 2481 model->def = s390_find_cpu_def(0, ibc_gen(unblocked_ibc), 2482 ibc_ec_ga(unblocked_ibc), 2483 model->features); 2484 } 2485 if (!model->def) { 2486 error_setg(errp, "KVM: host CPU model could not be identified"); 2487 return; 2488 } 2489 /* for now, we can only provide the AP feature with HW support */ 2490 if (ap_available()) { 2491 set_bit(S390_FEAT_AP, model->features); 2492 } 2493 2494 /* 2495 * Extended-Length SCCB is handled entirely within QEMU. 2496 * For PV guests this is completely fenced by the Ultravisor, as Service 2497 * Call error checking and STFLE interpretation are handled via SIE. 2498 */ 2499 set_bit(S390_FEAT_EXTENDED_LENGTH_SCCB, model->features); 2500 2501 if (kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) { 2502 set_bit(S390_FEAT_DIAG_318, model->features); 2503 } 2504 2505 /* Test for Ultravisor features that influence secure guest behavior */ 2506 query_uv_feat_guest(model->features); 2507 2508 /* strip of features that are not part of the maximum model */ 2509 bitmap_and(model->features, model->features, model->def->full_feat, 2510 S390_FEAT_MAX); 2511 } 2512 2513 static int configure_uv_feat_guest(const S390FeatBitmap features) 2514 { 2515 struct kvm_s390_vm_cpu_uv_feat uv_feat = {}; 2516 struct kvm_device_attr attribute = { 2517 .group = KVM_S390_VM_CPU_MODEL, 2518 .attr = KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST, 2519 .addr = (__u64) &uv_feat, 2520 }; 2521 2522 /* AP support check is currently the only user of the UV feature test */ 2523 if (!(uv_feat_supported() && ap_enabled(features))) { 2524 return 0; 2525 } 2526 2527 if (test_bit(S390_FEAT_UV_FEAT_AP, features)) { 2528 uv_feat.ap = 1; 2529 } 2530 if (test_bit(S390_FEAT_UV_FEAT_AP_INTR, features)) { 2531 uv_feat.ap_intr = 1; 2532 } 2533 2534 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); 2535 } 2536 2537 static void kvm_s390_configure_apie(bool interpret) 2538 { 2539 uint64_t attr = interpret ? KVM_S390_VM_CRYPTO_ENABLE_APIE : 2540 KVM_S390_VM_CRYPTO_DISABLE_APIE; 2541 2542 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { 2543 kvm_s390_set_crypto_attr(attr); 2544 } 2545 } 2546 2547 void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp) 2548 { 2549 struct kvm_s390_vm_cpu_processor prop = { 2550 .fac_list = { 0 }, 2551 }; 2552 struct kvm_device_attr attr = { 2553 .group = KVM_S390_VM_CPU_MODEL, 2554 .attr = KVM_S390_VM_CPU_PROCESSOR, 2555 .addr = (uint64_t) &prop, 2556 }; 2557 int rc; 2558 2559 if (!model) { 2560 /* compatibility handling if cpu models are disabled */ 2561 if (kvm_s390_cmma_available()) { 2562 kvm_s390_enable_cmma(); 2563 } 2564 return; 2565 } 2566 if (!kvm_s390_cpu_models_supported()) { 2567 error_setg(errp, "KVM doesn't support CPU models"); 2568 return; 2569 } 2570 prop.cpuid = s390_cpuid_from_cpu_model(model); 2571 prop.ibc = s390_ibc_from_cpu_model(model); 2572 /* configure cpu features indicated via STFL(e) */ 2573 s390_fill_feat_block(model->features, S390_FEAT_TYPE_STFL, 2574 (uint8_t *) prop.fac_list); 2575 rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 2576 if (rc) { 2577 error_setg(errp, "KVM: Error configuring the CPU model: %d", rc); 2578 return; 2579 } 2580 /* configure cpu features indicated e.g. via SCLP */ 2581 rc = configure_cpu_feat(model->features); 2582 if (rc) { 2583 error_setg(errp, "KVM: Error configuring CPU features: %d", rc); 2584 return; 2585 } 2586 /* configure cpu subfunctions indicated via query / test bit */ 2587 rc = configure_cpu_subfunc(model->features); 2588 if (rc) { 2589 error_setg(errp, "KVM: Error configuring CPU subfunctions: %d", rc); 2590 return; 2591 } 2592 /* enable CMM via CMMA */ 2593 if (test_bit(S390_FEAT_CMM, model->features)) { 2594 kvm_s390_enable_cmma(); 2595 } 2596 2597 if (ap_enabled(model->features)) { 2598 kvm_s390_configure_apie(true); 2599 } 2600 2601 /* configure UV-features for the guest indicated via query / test_bit */ 2602 rc = configure_uv_feat_guest(model->features); 2603 if (rc) { 2604 error_setg(errp, "KVM: Error configuring CPU UV features %d", rc); 2605 return; 2606 } 2607 } 2608 2609 void kvm_s390_restart_interrupt(S390CPU *cpu) 2610 { 2611 struct kvm_s390_irq irq = { 2612 .type = KVM_S390_RESTART, 2613 }; 2614 2615 kvm_s390_vcpu_interrupt(cpu, &irq); 2616 } 2617 2618 void kvm_s390_stop_interrupt(S390CPU *cpu) 2619 { 2620 struct kvm_s390_irq irq = { 2621 .type = KVM_S390_SIGP_STOP, 2622 }; 2623 2624 kvm_s390_vcpu_interrupt(cpu, &irq); 2625 } 2626 2627 bool kvm_arch_cpu_check_are_resettable(void) 2628 { 2629 return true; 2630 } 2631 2632 int kvm_s390_get_zpci_op(void) 2633 { 2634 return cap_zpci_op; 2635 } 2636 2637 int kvm_s390_topology_set_mtcr(uint64_t attr) 2638 { 2639 struct kvm_device_attr attribute = { 2640 .group = KVM_S390_VM_CPU_TOPOLOGY, 2641 .attr = attr, 2642 }; 2643 2644 if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { 2645 return 0; 2646 } 2647 if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) { 2648 return -ENOTSUP; 2649 } 2650 2651 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); 2652 } 2653 2654 void kvm_arch_accel_class_init(ObjectClass *oc) 2655 { 2656 } 2657