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_sync_regs; 143 static int cap_async_pf; 144 static int cap_mem_op; 145 static int cap_mem_op_extension; 146 static int cap_s390_irq; 147 static int cap_ri; 148 static int cap_hpage_1m; 149 static int cap_vcpu_resets; 150 static int cap_protected; 151 static int cap_zpci_op; 152 static int cap_protected_dump; 153 154 static bool mem_op_storage_key_support; 155 156 static int active_cmma; 157 158 static int kvm_s390_query_mem_limit(uint64_t *memory_limit) 159 { 160 struct kvm_device_attr attr = { 161 .group = KVM_S390_VM_MEM_CTRL, 162 .attr = KVM_S390_VM_MEM_LIMIT_SIZE, 163 .addr = (uint64_t) memory_limit, 164 }; 165 166 return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 167 } 168 169 int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit) 170 { 171 int rc; 172 173 struct kvm_device_attr attr = { 174 .group = KVM_S390_VM_MEM_CTRL, 175 .attr = KVM_S390_VM_MEM_LIMIT_SIZE, 176 .addr = (uint64_t) &new_limit, 177 }; 178 179 if (!kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_LIMIT_SIZE)) { 180 return 0; 181 } 182 183 rc = kvm_s390_query_mem_limit(hw_limit); 184 if (rc) { 185 return rc; 186 } else if (*hw_limit < new_limit) { 187 return -E2BIG; 188 } 189 190 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 191 } 192 193 int kvm_s390_cmma_active(void) 194 { 195 return active_cmma; 196 } 197 198 static bool kvm_s390_cmma_available(void) 199 { 200 static bool initialized, value; 201 202 if (!initialized) { 203 initialized = true; 204 value = kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_ENABLE_CMMA) && 205 kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_CLR_CMMA); 206 } 207 return value; 208 } 209 210 void kvm_s390_cmma_reset(void) 211 { 212 int rc; 213 struct kvm_device_attr attr = { 214 .group = KVM_S390_VM_MEM_CTRL, 215 .attr = KVM_S390_VM_MEM_CLR_CMMA, 216 }; 217 218 if (!kvm_s390_cmma_active()) { 219 return; 220 } 221 222 rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 223 trace_kvm_clear_cmma(rc); 224 } 225 226 static void kvm_s390_enable_cmma(void) 227 { 228 int rc; 229 struct kvm_device_attr attr = { 230 .group = KVM_S390_VM_MEM_CTRL, 231 .attr = KVM_S390_VM_MEM_ENABLE_CMMA, 232 }; 233 234 if (cap_hpage_1m) { 235 warn_report("CMM will not be enabled because it is not " 236 "compatible with huge memory backings."); 237 return; 238 } 239 rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 240 active_cmma = !rc; 241 trace_kvm_enable_cmma(rc); 242 } 243 244 static void kvm_s390_set_crypto_attr(uint64_t attr) 245 { 246 struct kvm_device_attr attribute = { 247 .group = KVM_S390_VM_CRYPTO, 248 .attr = attr, 249 }; 250 251 int ret = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); 252 253 if (ret) { 254 error_report("Failed to set crypto device attribute %lu: %s", 255 attr, strerror(-ret)); 256 } 257 } 258 259 static void kvm_s390_init_aes_kw(void) 260 { 261 uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_AES_KW; 262 263 if (object_property_get_bool(OBJECT(qdev_get_machine()), "aes-key-wrap", 264 NULL)) { 265 attr = KVM_S390_VM_CRYPTO_ENABLE_AES_KW; 266 } 267 268 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { 269 kvm_s390_set_crypto_attr(attr); 270 } 271 } 272 273 static void kvm_s390_init_dea_kw(void) 274 { 275 uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_DEA_KW; 276 277 if (object_property_get_bool(OBJECT(qdev_get_machine()), "dea-key-wrap", 278 NULL)) { 279 attr = KVM_S390_VM_CRYPTO_ENABLE_DEA_KW; 280 } 281 282 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { 283 kvm_s390_set_crypto_attr(attr); 284 } 285 } 286 287 void kvm_s390_crypto_reset(void) 288 { 289 if (s390_has_feat(S390_FEAT_MSA_EXT_3)) { 290 kvm_s390_init_aes_kw(); 291 kvm_s390_init_dea_kw(); 292 } 293 } 294 295 void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp) 296 { 297 if (pagesize == 4 * KiB) { 298 return; 299 } 300 301 if (!hpage_1m_allowed()) { 302 error_setg(errp, "This QEMU machine does not support huge page " 303 "mappings"); 304 return; 305 } 306 307 if (pagesize != 1 * MiB) { 308 error_setg(errp, "Memory backing with 2G pages was specified, " 309 "but KVM does not support this memory backing"); 310 return; 311 } 312 313 if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_HPAGE_1M, 0)) { 314 error_setg(errp, "Memory backing with 1M pages was specified, " 315 "but KVM does not support this memory backing"); 316 return; 317 } 318 319 cap_hpage_1m = 1; 320 } 321 322 int kvm_s390_get_hpage_1m(void) 323 { 324 return cap_hpage_1m; 325 } 326 327 static void ccw_machine_class_foreach(ObjectClass *oc, void *opaque) 328 { 329 MachineClass *mc = MACHINE_CLASS(oc); 330 331 mc->default_cpu_type = S390_CPU_TYPE_NAME("host"); 332 } 333 334 int kvm_arch_get_default_type(MachineState *ms) 335 { 336 return 0; 337 } 338 339 int kvm_arch_init(MachineState *ms, KVMState *s) 340 { 341 object_class_foreach(ccw_machine_class_foreach, TYPE_S390_CCW_MACHINE, 342 false, NULL); 343 344 if (!kvm_check_extension(kvm_state, KVM_CAP_DEVICE_CTRL)) { 345 error_report("KVM is missing capability KVM_CAP_DEVICE_CTRL - " 346 "please use kernel 3.15 or newer"); 347 return -1; 348 } 349 if (!kvm_check_extension(s, KVM_CAP_S390_COW)) { 350 error_report("KVM is missing capability KVM_CAP_S390_COW - " 351 "unsupported environment"); 352 return -1; 353 } 354 355 cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS); 356 cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF); 357 cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP); 358 cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION); 359 mem_op_storage_key_support = cap_mem_op_extension > 0; 360 cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ); 361 cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS); 362 cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED); 363 cap_zpci_op = kvm_check_extension(s, KVM_CAP_S390_ZPCI_OP); 364 cap_protected_dump = kvm_check_extension(s, KVM_CAP_S390_PROTECTED_DUMP); 365 366 kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0); 367 kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0); 368 kvm_vm_enable_cap(s, KVM_CAP_S390_USER_STSI, 0); 369 kvm_vm_enable_cap(s, KVM_CAP_S390_CPU_TOPOLOGY, 0); 370 if (ri_allowed()) { 371 if (kvm_vm_enable_cap(s, KVM_CAP_S390_RI, 0) == 0) { 372 cap_ri = 1; 373 } 374 } 375 if (cpu_model_allowed()) { 376 kvm_vm_enable_cap(s, KVM_CAP_S390_GS, 0); 377 } 378 379 /* 380 * The migration interface for ais was introduced with kernel 4.13 381 * but the capability itself had been active since 4.12. As migration 382 * support is considered necessary, we only try to enable this for 383 * newer machine types if KVM_CAP_S390_AIS_MIGRATION is available. 384 */ 385 if (cpu_model_allowed() && kvm_kernel_irqchip_allowed() && 386 kvm_check_extension(s, KVM_CAP_S390_AIS_MIGRATION)) { 387 kvm_vm_enable_cap(s, KVM_CAP_S390_AIS, 0); 388 } 389 390 kvm_set_max_memslot_size(KVM_SLOT_MAX_BYTES); 391 return 0; 392 } 393 394 int kvm_arch_irqchip_create(KVMState *s) 395 { 396 return 0; 397 } 398 399 unsigned long kvm_arch_vcpu_id(CPUState *cpu) 400 { 401 return cpu->cpu_index; 402 } 403 404 int kvm_arch_init_vcpu(CPUState *cs) 405 { 406 unsigned int max_cpus = MACHINE(qdev_get_machine())->smp.max_cpus; 407 S390CPU *cpu = S390_CPU(cs); 408 kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state); 409 cpu->irqstate = g_malloc0(VCPU_IRQ_BUF_SIZE(max_cpus)); 410 return 0; 411 } 412 413 int kvm_arch_destroy_vcpu(CPUState *cs) 414 { 415 S390CPU *cpu = S390_CPU(cs); 416 417 g_free(cpu->irqstate); 418 cpu->irqstate = NULL; 419 420 return 0; 421 } 422 423 static void kvm_s390_reset_vcpu(S390CPU *cpu, unsigned long type) 424 { 425 CPUState *cs = CPU(cpu); 426 427 /* 428 * The reset call is needed here to reset in-kernel vcpu data that 429 * we can't access directly from QEMU (i.e. with older kernels 430 * which don't support sync_regs/ONE_REG). Before this ioctl 431 * cpu_synchronize_state() is called in common kvm code 432 * (kvm-all). 433 */ 434 if (kvm_vcpu_ioctl(cs, type)) { 435 error_report("CPU reset failed on CPU %i type %lx", 436 cs->cpu_index, type); 437 } 438 } 439 440 void kvm_s390_reset_vcpu_initial(S390CPU *cpu) 441 { 442 kvm_s390_reset_vcpu(cpu, KVM_S390_INITIAL_RESET); 443 } 444 445 void kvm_s390_reset_vcpu_clear(S390CPU *cpu) 446 { 447 if (cap_vcpu_resets) { 448 kvm_s390_reset_vcpu(cpu, KVM_S390_CLEAR_RESET); 449 } else { 450 kvm_s390_reset_vcpu(cpu, KVM_S390_INITIAL_RESET); 451 } 452 } 453 454 void kvm_s390_reset_vcpu_normal(S390CPU *cpu) 455 { 456 if (cap_vcpu_resets) { 457 kvm_s390_reset_vcpu(cpu, KVM_S390_NORMAL_RESET); 458 } 459 } 460 461 static int can_sync_regs(CPUState *cs, int regs) 462 { 463 return cap_sync_regs && (cs->kvm_run->kvm_valid_regs & regs) == regs; 464 } 465 466 int kvm_arch_put_registers(CPUState *cs, int level) 467 { 468 S390CPU *cpu = S390_CPU(cs); 469 CPUS390XState *env = &cpu->env; 470 struct kvm_sregs sregs; 471 struct kvm_regs regs; 472 struct kvm_fpu fpu = {}; 473 int r; 474 int i; 475 476 /* always save the PSW and the GPRS*/ 477 cs->kvm_run->psw_addr = env->psw.addr; 478 cs->kvm_run->psw_mask = env->psw.mask; 479 480 if (can_sync_regs(cs, KVM_SYNC_GPRS)) { 481 for (i = 0; i < 16; i++) { 482 cs->kvm_run->s.regs.gprs[i] = env->regs[i]; 483 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS; 484 } 485 } else { 486 for (i = 0; i < 16; i++) { 487 regs.gprs[i] = env->regs[i]; 488 } 489 r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s); 490 if (r < 0) { 491 return r; 492 } 493 } 494 495 if (can_sync_regs(cs, KVM_SYNC_VRS)) { 496 for (i = 0; i < 32; i++) { 497 cs->kvm_run->s.regs.vrs[i][0] = env->vregs[i][0]; 498 cs->kvm_run->s.regs.vrs[i][1] = env->vregs[i][1]; 499 } 500 cs->kvm_run->s.regs.fpc = env->fpc; 501 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS; 502 } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) { 503 for (i = 0; i < 16; i++) { 504 cs->kvm_run->s.regs.fprs[i] = *get_freg(env, i); 505 } 506 cs->kvm_run->s.regs.fpc = env->fpc; 507 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_FPRS; 508 } else { 509 /* Floating point */ 510 for (i = 0; i < 16; i++) { 511 fpu.fprs[i] = *get_freg(env, i); 512 } 513 fpu.fpc = env->fpc; 514 515 r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu); 516 if (r < 0) { 517 return r; 518 } 519 } 520 521 /* Do we need to save more than that? */ 522 if (level == KVM_PUT_RUNTIME_STATE) { 523 return 0; 524 } 525 526 if (can_sync_regs(cs, KVM_SYNC_ARCH0)) { 527 cs->kvm_run->s.regs.cputm = env->cputm; 528 cs->kvm_run->s.regs.ckc = env->ckc; 529 cs->kvm_run->s.regs.todpr = env->todpr; 530 cs->kvm_run->s.regs.gbea = env->gbea; 531 cs->kvm_run->s.regs.pp = env->pp; 532 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ARCH0; 533 } else { 534 /* 535 * These ONE_REGS are not protected by a capability. As they are only 536 * necessary for migration we just trace a possible error, but don't 537 * return with an error return code. 538 */ 539 kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm); 540 kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc); 541 kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr); 542 kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea); 543 kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp); 544 } 545 546 if (can_sync_regs(cs, KVM_SYNC_RICCB)) { 547 memcpy(cs->kvm_run->s.regs.riccb, env->riccb, 64); 548 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_RICCB; 549 } 550 551 /* pfault parameters */ 552 if (can_sync_regs(cs, KVM_SYNC_PFAULT)) { 553 cs->kvm_run->s.regs.pft = env->pfault_token; 554 cs->kvm_run->s.regs.pfs = env->pfault_select; 555 cs->kvm_run->s.regs.pfc = env->pfault_compare; 556 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT; 557 } else if (cap_async_pf) { 558 r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token); 559 if (r < 0) { 560 return r; 561 } 562 r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare); 563 if (r < 0) { 564 return r; 565 } 566 r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select); 567 if (r < 0) { 568 return r; 569 } 570 } 571 572 /* access registers and control registers*/ 573 if (can_sync_regs(cs, KVM_SYNC_ACRS | KVM_SYNC_CRS)) { 574 for (i = 0; i < 16; i++) { 575 cs->kvm_run->s.regs.acrs[i] = env->aregs[i]; 576 cs->kvm_run->s.regs.crs[i] = env->cregs[i]; 577 } 578 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS; 579 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS; 580 } else { 581 for (i = 0; i < 16; i++) { 582 sregs.acrs[i] = env->aregs[i]; 583 sregs.crs[i] = env->cregs[i]; 584 } 585 r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs); 586 if (r < 0) { 587 return r; 588 } 589 } 590 591 if (can_sync_regs(cs, KVM_SYNC_GSCB)) { 592 memcpy(cs->kvm_run->s.regs.gscb, env->gscb, 32); 593 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GSCB; 594 } 595 596 if (can_sync_regs(cs, KVM_SYNC_BPBC)) { 597 cs->kvm_run->s.regs.bpbc = env->bpbc; 598 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_BPBC; 599 } 600 601 if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) { 602 cs->kvm_run->s.regs.etoken = env->etoken; 603 cs->kvm_run->s.regs.etoken_extension = env->etoken_extension; 604 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ETOKEN; 605 } 606 607 if (can_sync_regs(cs, KVM_SYNC_DIAG318)) { 608 cs->kvm_run->s.regs.diag318 = env->diag318_info; 609 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318; 610 } 611 612 /* Finally the prefix */ 613 if (can_sync_regs(cs, KVM_SYNC_PREFIX)) { 614 cs->kvm_run->s.regs.prefix = env->psa; 615 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX; 616 } else { 617 /* prefix is only supported via sync regs */ 618 } 619 return 0; 620 } 621 622 int kvm_arch_get_registers(CPUState *cs) 623 { 624 S390CPU *cpu = S390_CPU(cs); 625 CPUS390XState *env = &cpu->env; 626 struct kvm_sregs sregs; 627 struct kvm_regs regs; 628 struct kvm_fpu fpu; 629 int i, r; 630 631 /* get the PSW */ 632 env->psw.addr = cs->kvm_run->psw_addr; 633 env->psw.mask = cs->kvm_run->psw_mask; 634 635 /* the GPRS */ 636 if (can_sync_regs(cs, KVM_SYNC_GPRS)) { 637 for (i = 0; i < 16; i++) { 638 env->regs[i] = cs->kvm_run->s.regs.gprs[i]; 639 } 640 } else { 641 r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); 642 if (r < 0) { 643 return r; 644 } 645 for (i = 0; i < 16; i++) { 646 env->regs[i] = regs.gprs[i]; 647 } 648 } 649 650 /* The ACRS and CRS */ 651 if (can_sync_regs(cs, KVM_SYNC_ACRS | KVM_SYNC_CRS)) { 652 for (i = 0; i < 16; i++) { 653 env->aregs[i] = cs->kvm_run->s.regs.acrs[i]; 654 env->cregs[i] = cs->kvm_run->s.regs.crs[i]; 655 } 656 } else { 657 r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs); 658 if (r < 0) { 659 return r; 660 } 661 for (i = 0; i < 16; i++) { 662 env->aregs[i] = sregs.acrs[i]; 663 env->cregs[i] = sregs.crs[i]; 664 } 665 } 666 667 /* Floating point and vector registers */ 668 if (can_sync_regs(cs, KVM_SYNC_VRS)) { 669 for (i = 0; i < 32; i++) { 670 env->vregs[i][0] = cs->kvm_run->s.regs.vrs[i][0]; 671 env->vregs[i][1] = cs->kvm_run->s.regs.vrs[i][1]; 672 } 673 env->fpc = cs->kvm_run->s.regs.fpc; 674 } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) { 675 for (i = 0; i < 16; i++) { 676 *get_freg(env, i) = cs->kvm_run->s.regs.fprs[i]; 677 } 678 env->fpc = cs->kvm_run->s.regs.fpc; 679 } else { 680 r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu); 681 if (r < 0) { 682 return r; 683 } 684 for (i = 0; i < 16; i++) { 685 *get_freg(env, i) = fpu.fprs[i]; 686 } 687 env->fpc = fpu.fpc; 688 } 689 690 /* The prefix */ 691 if (can_sync_regs(cs, KVM_SYNC_PREFIX)) { 692 env->psa = cs->kvm_run->s.regs.prefix; 693 } 694 695 if (can_sync_regs(cs, KVM_SYNC_ARCH0)) { 696 env->cputm = cs->kvm_run->s.regs.cputm; 697 env->ckc = cs->kvm_run->s.regs.ckc; 698 env->todpr = cs->kvm_run->s.regs.todpr; 699 env->gbea = cs->kvm_run->s.regs.gbea; 700 env->pp = cs->kvm_run->s.regs.pp; 701 } else { 702 /* 703 * These ONE_REGS are not protected by a capability. As they are only 704 * necessary for migration we just trace a possible error, but don't 705 * return with an error return code. 706 */ 707 kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm); 708 kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc); 709 kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr); 710 kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea); 711 kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp); 712 } 713 714 if (can_sync_regs(cs, KVM_SYNC_RICCB)) { 715 memcpy(env->riccb, cs->kvm_run->s.regs.riccb, 64); 716 } 717 718 if (can_sync_regs(cs, KVM_SYNC_GSCB)) { 719 memcpy(env->gscb, cs->kvm_run->s.regs.gscb, 32); 720 } 721 722 if (can_sync_regs(cs, KVM_SYNC_BPBC)) { 723 env->bpbc = cs->kvm_run->s.regs.bpbc; 724 } 725 726 if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) { 727 env->etoken = cs->kvm_run->s.regs.etoken; 728 env->etoken_extension = cs->kvm_run->s.regs.etoken_extension; 729 } 730 731 /* pfault parameters */ 732 if (can_sync_regs(cs, KVM_SYNC_PFAULT)) { 733 env->pfault_token = cs->kvm_run->s.regs.pft; 734 env->pfault_select = cs->kvm_run->s.regs.pfs; 735 env->pfault_compare = cs->kvm_run->s.regs.pfc; 736 } else if (cap_async_pf) { 737 r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token); 738 if (r < 0) { 739 return r; 740 } 741 r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare); 742 if (r < 0) { 743 return r; 744 } 745 r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select); 746 if (r < 0) { 747 return r; 748 } 749 } 750 751 if (can_sync_regs(cs, KVM_SYNC_DIAG318)) { 752 env->diag318_info = cs->kvm_run->s.regs.diag318; 753 } 754 755 return 0; 756 } 757 758 int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_low) 759 { 760 int r; 761 struct kvm_device_attr attr = { 762 .group = KVM_S390_VM_TOD, 763 .attr = KVM_S390_VM_TOD_LOW, 764 .addr = (uint64_t)tod_low, 765 }; 766 767 r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 768 if (r) { 769 return r; 770 } 771 772 attr.attr = KVM_S390_VM_TOD_HIGH; 773 attr.addr = (uint64_t)tod_high; 774 return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 775 } 776 777 int kvm_s390_get_clock_ext(uint8_t *tod_high, uint64_t *tod_low) 778 { 779 int r; 780 struct kvm_s390_vm_tod_clock gtod; 781 struct kvm_device_attr attr = { 782 .group = KVM_S390_VM_TOD, 783 .attr = KVM_S390_VM_TOD_EXT, 784 .addr = (uint64_t)>od, 785 }; 786 787 r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 788 *tod_high = gtod.epoch_idx; 789 *tod_low = gtod.tod; 790 791 return r; 792 } 793 794 int kvm_s390_set_clock(uint8_t tod_high, uint64_t tod_low) 795 { 796 int r; 797 struct kvm_device_attr attr = { 798 .group = KVM_S390_VM_TOD, 799 .attr = KVM_S390_VM_TOD_LOW, 800 .addr = (uint64_t)&tod_low, 801 }; 802 803 r = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 804 if (r) { 805 return r; 806 } 807 808 attr.attr = KVM_S390_VM_TOD_HIGH; 809 attr.addr = (uint64_t)&tod_high; 810 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 811 } 812 813 int kvm_s390_set_clock_ext(uint8_t tod_high, uint64_t tod_low) 814 { 815 struct kvm_s390_vm_tod_clock gtod = { 816 .epoch_idx = tod_high, 817 .tod = tod_low, 818 }; 819 struct kvm_device_attr attr = { 820 .group = KVM_S390_VM_TOD, 821 .attr = KVM_S390_VM_TOD_EXT, 822 .addr = (uint64_t)>od, 823 }; 824 825 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 826 } 827 828 /** 829 * kvm_s390_mem_op: 830 * @addr: the logical start address in guest memory 831 * @ar: the access register number 832 * @hostbuf: buffer in host memory. NULL = do only checks w/o copying 833 * @len: length that should be transferred 834 * @is_write: true = write, false = read 835 * Returns: 0 on success, non-zero if an exception or error occurred 836 * 837 * Use KVM ioctl to read/write from/to guest memory. An access exception 838 * is injected into the vCPU in case of translation errors. 839 */ 840 int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf, 841 int len, bool is_write) 842 { 843 struct kvm_s390_mem_op mem_op = { 844 .gaddr = addr, 845 .flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION, 846 .size = len, 847 .op = is_write ? KVM_S390_MEMOP_LOGICAL_WRITE 848 : KVM_S390_MEMOP_LOGICAL_READ, 849 .buf = (uint64_t)hostbuf, 850 .ar = ar, 851 .key = (cpu->env.psw.mask & PSW_MASK_KEY) >> PSW_SHIFT_KEY, 852 }; 853 int ret; 854 855 if (!cap_mem_op) { 856 return -ENOSYS; 857 } 858 if (!hostbuf) { 859 mem_op.flags |= KVM_S390_MEMOP_F_CHECK_ONLY; 860 } 861 if (mem_op_storage_key_support) { 862 mem_op.flags |= KVM_S390_MEMOP_F_SKEY_PROTECTION; 863 } 864 865 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op); 866 if (ret < 0) { 867 warn_report("KVM_S390_MEM_OP failed: %s", strerror(-ret)); 868 } 869 return ret; 870 } 871 872 int kvm_s390_mem_op_pv(S390CPU *cpu, uint64_t offset, void *hostbuf, 873 int len, bool is_write) 874 { 875 struct kvm_s390_mem_op mem_op = { 876 .sida_offset = offset, 877 .size = len, 878 .op = is_write ? KVM_S390_MEMOP_SIDA_WRITE 879 : KVM_S390_MEMOP_SIDA_READ, 880 .buf = (uint64_t)hostbuf, 881 }; 882 int ret; 883 884 if (!cap_mem_op || !cap_protected) { 885 return -ENOSYS; 886 } 887 888 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op); 889 if (ret < 0) { 890 error_report("KVM_S390_MEM_OP failed: %s", strerror(-ret)); 891 abort(); 892 } 893 return ret; 894 } 895 896 static uint8_t const *sw_bp_inst; 897 static uint8_t sw_bp_ilen; 898 899 static void determine_sw_breakpoint_instr(void) 900 { 901 /* DIAG 501 is used for sw breakpoints with old kernels */ 902 static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; 903 /* Instruction 0x0000 is used for sw breakpoints with recent kernels */ 904 static const uint8_t instr_0x0000[] = {0x00, 0x00}; 905 906 if (sw_bp_inst) { 907 return; 908 } 909 if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_USER_INSTR0, 0)) { 910 sw_bp_inst = diag_501; 911 sw_bp_ilen = sizeof(diag_501); 912 trace_kvm_sw_breakpoint(4); 913 } else { 914 sw_bp_inst = instr_0x0000; 915 sw_bp_ilen = sizeof(instr_0x0000); 916 trace_kvm_sw_breakpoint(2); 917 } 918 } 919 920 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 921 { 922 determine_sw_breakpoint_instr(); 923 924 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 925 sw_bp_ilen, 0) || 926 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)sw_bp_inst, sw_bp_ilen, 1)) { 927 return -EINVAL; 928 } 929 return 0; 930 } 931 932 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 933 { 934 uint8_t t[MAX_ILEN]; 935 936 if (cpu_memory_rw_debug(cs, bp->pc, t, sw_bp_ilen, 0)) { 937 return -EINVAL; 938 } else if (memcmp(t, sw_bp_inst, sw_bp_ilen)) { 939 return -EINVAL; 940 } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 941 sw_bp_ilen, 1)) { 942 return -EINVAL; 943 } 944 945 return 0; 946 } 947 948 static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr, 949 int len, int type) 950 { 951 int n; 952 953 for (n = 0; n < nb_hw_breakpoints; n++) { 954 if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type && 955 (hw_breakpoints[n].len == len || len == -1)) { 956 return &hw_breakpoints[n]; 957 } 958 } 959 960 return NULL; 961 } 962 963 static int insert_hw_breakpoint(target_ulong addr, int len, int type) 964 { 965 int size; 966 967 if (find_hw_breakpoint(addr, len, type)) { 968 return -EEXIST; 969 } 970 971 size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint); 972 973 if (!hw_breakpoints) { 974 nb_hw_breakpoints = 0; 975 hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size); 976 } else { 977 hw_breakpoints = 978 (struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size); 979 } 980 981 if (!hw_breakpoints) { 982 nb_hw_breakpoints = 0; 983 return -ENOMEM; 984 } 985 986 hw_breakpoints[nb_hw_breakpoints].addr = addr; 987 hw_breakpoints[nb_hw_breakpoints].len = len; 988 hw_breakpoints[nb_hw_breakpoints].type = type; 989 990 nb_hw_breakpoints++; 991 992 return 0; 993 } 994 995 int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type) 996 { 997 switch (type) { 998 case GDB_BREAKPOINT_HW: 999 type = KVM_HW_BP; 1000 break; 1001 case GDB_WATCHPOINT_WRITE: 1002 if (len < 1) { 1003 return -EINVAL; 1004 } 1005 type = KVM_HW_WP_WRITE; 1006 break; 1007 default: 1008 return -ENOSYS; 1009 } 1010 return insert_hw_breakpoint(addr, len, type); 1011 } 1012 1013 int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type) 1014 { 1015 int size; 1016 struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type); 1017 1018 if (bp == NULL) { 1019 return -ENOENT; 1020 } 1021 1022 nb_hw_breakpoints--; 1023 if (nb_hw_breakpoints > 0) { 1024 /* 1025 * In order to trim the array, move the last element to the position to 1026 * be removed - if necessary. 1027 */ 1028 if (bp != &hw_breakpoints[nb_hw_breakpoints]) { 1029 *bp = hw_breakpoints[nb_hw_breakpoints]; 1030 } 1031 size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint); 1032 hw_breakpoints = 1033 g_realloc(hw_breakpoints, size); 1034 } else { 1035 g_free(hw_breakpoints); 1036 hw_breakpoints = NULL; 1037 } 1038 1039 return 0; 1040 } 1041 1042 void kvm_arch_remove_all_hw_breakpoints(void) 1043 { 1044 nb_hw_breakpoints = 0; 1045 g_free(hw_breakpoints); 1046 hw_breakpoints = NULL; 1047 } 1048 1049 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) 1050 { 1051 int i; 1052 1053 if (nb_hw_breakpoints > 0) { 1054 dbg->arch.nr_hw_bp = nb_hw_breakpoints; 1055 dbg->arch.hw_bp = hw_breakpoints; 1056 1057 for (i = 0; i < nb_hw_breakpoints; ++i) { 1058 hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu, 1059 hw_breakpoints[i].addr); 1060 } 1061 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 1062 } else { 1063 dbg->arch.nr_hw_bp = 0; 1064 dbg->arch.hw_bp = NULL; 1065 } 1066 } 1067 1068 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) 1069 { 1070 } 1071 1072 MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) 1073 { 1074 return MEMTXATTRS_UNSPECIFIED; 1075 } 1076 1077 int kvm_arch_process_async_events(CPUState *cs) 1078 { 1079 return cs->halted; 1080 } 1081 1082 static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq, 1083 struct kvm_s390_interrupt *interrupt) 1084 { 1085 int r = 0; 1086 1087 interrupt->type = irq->type; 1088 switch (irq->type) { 1089 case KVM_S390_INT_VIRTIO: 1090 interrupt->parm = irq->u.ext.ext_params; 1091 /* fall through */ 1092 case KVM_S390_INT_PFAULT_INIT: 1093 case KVM_S390_INT_PFAULT_DONE: 1094 interrupt->parm64 = irq->u.ext.ext_params2; 1095 break; 1096 case KVM_S390_PROGRAM_INT: 1097 interrupt->parm = irq->u.pgm.code; 1098 break; 1099 case KVM_S390_SIGP_SET_PREFIX: 1100 interrupt->parm = irq->u.prefix.address; 1101 break; 1102 case KVM_S390_INT_SERVICE: 1103 interrupt->parm = irq->u.ext.ext_params; 1104 break; 1105 case KVM_S390_MCHK: 1106 interrupt->parm = irq->u.mchk.cr14; 1107 interrupt->parm64 = irq->u.mchk.mcic; 1108 break; 1109 case KVM_S390_INT_EXTERNAL_CALL: 1110 interrupt->parm = irq->u.extcall.code; 1111 break; 1112 case KVM_S390_INT_EMERGENCY: 1113 interrupt->parm = irq->u.emerg.code; 1114 break; 1115 case KVM_S390_SIGP_STOP: 1116 case KVM_S390_RESTART: 1117 break; /* These types have no parameters */ 1118 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 1119 interrupt->parm = irq->u.io.subchannel_id << 16; 1120 interrupt->parm |= irq->u.io.subchannel_nr; 1121 interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32; 1122 interrupt->parm64 |= irq->u.io.io_int_word; 1123 break; 1124 default: 1125 r = -EINVAL; 1126 break; 1127 } 1128 return r; 1129 } 1130 1131 static void inject_vcpu_irq_legacy(CPUState *cs, struct kvm_s390_irq *irq) 1132 { 1133 struct kvm_s390_interrupt kvmint = {}; 1134 int r; 1135 1136 r = s390_kvm_irq_to_interrupt(irq, &kvmint); 1137 if (r < 0) { 1138 fprintf(stderr, "%s called with bogus interrupt\n", __func__); 1139 exit(1); 1140 } 1141 1142 r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); 1143 if (r < 0) { 1144 fprintf(stderr, "KVM failed to inject interrupt\n"); 1145 exit(1); 1146 } 1147 } 1148 1149 void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq) 1150 { 1151 CPUState *cs = CPU(cpu); 1152 int r; 1153 1154 if (cap_s390_irq) { 1155 r = kvm_vcpu_ioctl(cs, KVM_S390_IRQ, irq); 1156 if (!r) { 1157 return; 1158 } 1159 error_report("KVM failed to inject interrupt %llx", irq->type); 1160 exit(1); 1161 } 1162 1163 inject_vcpu_irq_legacy(cs, irq); 1164 } 1165 1166 void kvm_s390_floating_interrupt_legacy(struct kvm_s390_irq *irq) 1167 { 1168 struct kvm_s390_interrupt kvmint = {}; 1169 int r; 1170 1171 r = s390_kvm_irq_to_interrupt(irq, &kvmint); 1172 if (r < 0) { 1173 fprintf(stderr, "%s called with bogus interrupt\n", __func__); 1174 exit(1); 1175 } 1176 1177 r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint); 1178 if (r < 0) { 1179 fprintf(stderr, "KVM failed to inject interrupt\n"); 1180 exit(1); 1181 } 1182 } 1183 1184 void kvm_s390_program_interrupt(S390CPU *cpu, uint16_t code) 1185 { 1186 struct kvm_s390_irq irq = { 1187 .type = KVM_S390_PROGRAM_INT, 1188 .u.pgm.code = code, 1189 }; 1190 qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n", 1191 cpu->env.psw.addr); 1192 kvm_s390_vcpu_interrupt(cpu, &irq); 1193 } 1194 1195 void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code) 1196 { 1197 struct kvm_s390_irq irq = { 1198 .type = KVM_S390_PROGRAM_INT, 1199 .u.pgm.code = code, 1200 .u.pgm.trans_exc_code = te_code, 1201 .u.pgm.exc_access_id = te_code & 3, 1202 }; 1203 1204 kvm_s390_vcpu_interrupt(cpu, &irq); 1205 } 1206 1207 static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, 1208 uint16_t ipbh0) 1209 { 1210 CPUS390XState *env = &cpu->env; 1211 uint64_t sccb; 1212 uint32_t code; 1213 int r; 1214 1215 sccb = env->regs[ipbh0 & 0xf]; 1216 code = env->regs[(ipbh0 & 0xf0) >> 4]; 1217 1218 switch (run->s390_sieic.icptcode) { 1219 case ICPT_PV_INSTR_NOTIFICATION: 1220 g_assert(s390_is_pv()); 1221 /* The notification intercepts are currently handled by KVM */ 1222 error_report("unexpected SCLP PV notification"); 1223 exit(1); 1224 break; 1225 case ICPT_PV_INSTR: 1226 g_assert(s390_is_pv()); 1227 sclp_service_call_protected(env, sccb, code); 1228 /* Setting the CC is done by the Ultravisor. */ 1229 break; 1230 case ICPT_INSTRUCTION: 1231 g_assert(!s390_is_pv()); 1232 r = sclp_service_call(env, sccb, code); 1233 if (r < 0) { 1234 kvm_s390_program_interrupt(cpu, -r); 1235 return; 1236 } 1237 setcc(cpu, r); 1238 } 1239 } 1240 1241 static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) 1242 { 1243 CPUS390XState *env = &cpu->env; 1244 int rc = 0; 1245 uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; 1246 1247 switch (ipa1) { 1248 case PRIV_B2_XSCH: 1249 ioinst_handle_xsch(cpu, env->regs[1], RA_IGNORED); 1250 break; 1251 case PRIV_B2_CSCH: 1252 ioinst_handle_csch(cpu, env->regs[1], RA_IGNORED); 1253 break; 1254 case PRIV_B2_HSCH: 1255 ioinst_handle_hsch(cpu, env->regs[1], RA_IGNORED); 1256 break; 1257 case PRIV_B2_MSCH: 1258 ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED); 1259 break; 1260 case PRIV_B2_SSCH: 1261 ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED); 1262 break; 1263 case PRIV_B2_STCRW: 1264 ioinst_handle_stcrw(cpu, run->s390_sieic.ipb, RA_IGNORED); 1265 break; 1266 case PRIV_B2_STSCH: 1267 ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED); 1268 break; 1269 case PRIV_B2_TSCH: 1270 /* We should only get tsch via KVM_EXIT_S390_TSCH. */ 1271 fprintf(stderr, "Spurious tsch intercept\n"); 1272 break; 1273 case PRIV_B2_CHSC: 1274 ioinst_handle_chsc(cpu, run->s390_sieic.ipb, RA_IGNORED); 1275 break; 1276 case PRIV_B2_TPI: 1277 /* This should have been handled by kvm already. */ 1278 fprintf(stderr, "Spurious tpi intercept\n"); 1279 break; 1280 case PRIV_B2_SCHM: 1281 ioinst_handle_schm(cpu, env->regs[1], env->regs[2], 1282 run->s390_sieic.ipb, RA_IGNORED); 1283 break; 1284 case PRIV_B2_RSCH: 1285 ioinst_handle_rsch(cpu, env->regs[1], RA_IGNORED); 1286 break; 1287 case PRIV_B2_RCHP: 1288 ioinst_handle_rchp(cpu, env->regs[1], RA_IGNORED); 1289 break; 1290 case PRIV_B2_STCPS: 1291 /* We do not provide this instruction, it is suppressed. */ 1292 break; 1293 case PRIV_B2_SAL: 1294 ioinst_handle_sal(cpu, env->regs[1], RA_IGNORED); 1295 break; 1296 case PRIV_B2_SIGA: 1297 /* Not provided, set CC = 3 for subchannel not operational */ 1298 setcc(cpu, 3); 1299 break; 1300 case PRIV_B2_SCLP_CALL: 1301 kvm_sclp_service_call(cpu, run, ipbh0); 1302 break; 1303 default: 1304 rc = -1; 1305 trace_kvm_insn_unhandled_priv(ipa1); 1306 break; 1307 } 1308 1309 return rc; 1310 } 1311 1312 static uint64_t get_base_disp_rxy(S390CPU *cpu, struct kvm_run *run, 1313 uint8_t *ar) 1314 { 1315 CPUS390XState *env = &cpu->env; 1316 uint32_t x2 = (run->s390_sieic.ipa & 0x000f); 1317 uint32_t base2 = run->s390_sieic.ipb >> 28; 1318 uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) + 1319 ((run->s390_sieic.ipb & 0xff00) << 4); 1320 1321 if (disp2 & 0x80000) { 1322 disp2 += 0xfff00000; 1323 } 1324 if (ar) { 1325 *ar = base2; 1326 } 1327 1328 return (base2 ? env->regs[base2] : 0) + 1329 (x2 ? env->regs[x2] : 0) + (long)(int)disp2; 1330 } 1331 1332 static uint64_t get_base_disp_rsy(S390CPU *cpu, struct kvm_run *run, 1333 uint8_t *ar) 1334 { 1335 CPUS390XState *env = &cpu->env; 1336 uint32_t base2 = run->s390_sieic.ipb >> 28; 1337 uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) + 1338 ((run->s390_sieic.ipb & 0xff00) << 4); 1339 1340 if (disp2 & 0x80000) { 1341 disp2 += 0xfff00000; 1342 } 1343 if (ar) { 1344 *ar = base2; 1345 } 1346 1347 return (base2 ? env->regs[base2] : 0) + (long)(int)disp2; 1348 } 1349 1350 static int kvm_clp_service_call(S390CPU *cpu, struct kvm_run *run) 1351 { 1352 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1353 1354 if (s390_has_feat(S390_FEAT_ZPCI)) { 1355 return clp_service_call(cpu, r2, RA_IGNORED); 1356 } else { 1357 return -1; 1358 } 1359 } 1360 1361 static int kvm_pcilg_service_call(S390CPU *cpu, struct kvm_run *run) 1362 { 1363 uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20; 1364 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1365 1366 if (s390_has_feat(S390_FEAT_ZPCI)) { 1367 return pcilg_service_call(cpu, r1, r2, RA_IGNORED); 1368 } else { 1369 return -1; 1370 } 1371 } 1372 1373 static int kvm_pcistg_service_call(S390CPU *cpu, struct kvm_run *run) 1374 { 1375 uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20; 1376 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1377 1378 if (s390_has_feat(S390_FEAT_ZPCI)) { 1379 return pcistg_service_call(cpu, r1, r2, RA_IGNORED); 1380 } else { 1381 return -1; 1382 } 1383 } 1384 1385 static int kvm_stpcifc_service_call(S390CPU *cpu, struct kvm_run *run) 1386 { 1387 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1388 uint64_t fiba; 1389 uint8_t ar; 1390 1391 if (s390_has_feat(S390_FEAT_ZPCI)) { 1392 fiba = get_base_disp_rxy(cpu, run, &ar); 1393 1394 return stpcifc_service_call(cpu, r1, fiba, ar, RA_IGNORED); 1395 } else { 1396 return -1; 1397 } 1398 } 1399 1400 static int kvm_sic_service_call(S390CPU *cpu, struct kvm_run *run) 1401 { 1402 CPUS390XState *env = &cpu->env; 1403 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1404 uint8_t r3 = run->s390_sieic.ipa & 0x000f; 1405 uint8_t isc; 1406 uint16_t mode; 1407 int r; 1408 1409 mode = env->regs[r1] & 0xffff; 1410 isc = (env->regs[r3] >> 27) & 0x7; 1411 r = css_do_sic(env, isc, mode); 1412 if (r) { 1413 kvm_s390_program_interrupt(cpu, -r); 1414 } 1415 1416 return 0; 1417 } 1418 1419 static int kvm_rpcit_service_call(S390CPU *cpu, struct kvm_run *run) 1420 { 1421 uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20; 1422 uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16; 1423 1424 if (s390_has_feat(S390_FEAT_ZPCI)) { 1425 return rpcit_service_call(cpu, r1, r2, RA_IGNORED); 1426 } else { 1427 return -1; 1428 } 1429 } 1430 1431 static int kvm_pcistb_service_call(S390CPU *cpu, struct kvm_run *run) 1432 { 1433 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1434 uint8_t r3 = run->s390_sieic.ipa & 0x000f; 1435 uint64_t gaddr; 1436 uint8_t ar; 1437 1438 if (s390_has_feat(S390_FEAT_ZPCI)) { 1439 gaddr = get_base_disp_rsy(cpu, run, &ar); 1440 1441 return pcistb_service_call(cpu, r1, r3, gaddr, ar, RA_IGNORED); 1442 } else { 1443 return -1; 1444 } 1445 } 1446 1447 static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run) 1448 { 1449 uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1450 uint64_t fiba; 1451 uint8_t ar; 1452 1453 if (s390_has_feat(S390_FEAT_ZPCI)) { 1454 fiba = get_base_disp_rxy(cpu, run, &ar); 1455 1456 return mpcifc_service_call(cpu, r1, fiba, ar, RA_IGNORED); 1457 } else { 1458 return -1; 1459 } 1460 } 1461 1462 static void kvm_handle_ptf(S390CPU *cpu, struct kvm_run *run) 1463 { 1464 uint8_t r1 = (run->s390_sieic.ipb >> 20) & 0x0f; 1465 1466 s390_handle_ptf(cpu, r1, RA_IGNORED); 1467 } 1468 1469 static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) 1470 { 1471 int r = 0; 1472 1473 switch (ipa1) { 1474 case PRIV_B9_CLP: 1475 r = kvm_clp_service_call(cpu, run); 1476 break; 1477 case PRIV_B9_PCISTG: 1478 r = kvm_pcistg_service_call(cpu, run); 1479 break; 1480 case PRIV_B9_PCILG: 1481 r = kvm_pcilg_service_call(cpu, run); 1482 break; 1483 case PRIV_B9_RPCIT: 1484 r = kvm_rpcit_service_call(cpu, run); 1485 break; 1486 case PRIV_B9_PTF: 1487 kvm_handle_ptf(cpu, run); 1488 break; 1489 case PRIV_B9_EQBS: 1490 /* just inject exception */ 1491 r = -1; 1492 break; 1493 default: 1494 r = -1; 1495 trace_kvm_insn_unhandled_priv(ipa1); 1496 break; 1497 } 1498 1499 return r; 1500 } 1501 1502 static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl) 1503 { 1504 int r = 0; 1505 1506 switch (ipbl) { 1507 case PRIV_EB_PCISTB: 1508 r = kvm_pcistb_service_call(cpu, run); 1509 break; 1510 case PRIV_EB_SIC: 1511 r = kvm_sic_service_call(cpu, run); 1512 break; 1513 case PRIV_EB_SQBS: 1514 /* just inject exception */ 1515 r = -1; 1516 break; 1517 default: 1518 r = -1; 1519 trace_kvm_insn_unhandled_priv(ipbl); 1520 break; 1521 } 1522 1523 return r; 1524 } 1525 1526 static int handle_e3(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl) 1527 { 1528 int r = 0; 1529 1530 switch (ipbl) { 1531 case PRIV_E3_MPCIFC: 1532 r = kvm_mpcifc_service_call(cpu, run); 1533 break; 1534 case PRIV_E3_STPCIFC: 1535 r = kvm_stpcifc_service_call(cpu, run); 1536 break; 1537 default: 1538 r = -1; 1539 trace_kvm_insn_unhandled_priv(ipbl); 1540 break; 1541 } 1542 1543 return r; 1544 } 1545 1546 static int handle_hypercall(S390CPU *cpu, struct kvm_run *run) 1547 { 1548 CPUS390XState *env = &cpu->env; 1549 int ret; 1550 1551 ret = s390_virtio_hypercall(env); 1552 if (ret == -EINVAL) { 1553 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1554 return 0; 1555 } 1556 1557 return ret; 1558 } 1559 1560 static void kvm_handle_diag_288(S390CPU *cpu, struct kvm_run *run) 1561 { 1562 uint64_t r1, r3; 1563 int rc; 1564 1565 r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1566 r3 = run->s390_sieic.ipa & 0x000f; 1567 rc = handle_diag_288(&cpu->env, r1, r3); 1568 if (rc) { 1569 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1570 } 1571 } 1572 1573 static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run) 1574 { 1575 uint64_t r1, r3; 1576 1577 r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; 1578 r3 = run->s390_sieic.ipa & 0x000f; 1579 handle_diag_308(&cpu->env, r1, r3, RA_IGNORED); 1580 } 1581 1582 static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run) 1583 { 1584 CPUS390XState *env = &cpu->env; 1585 unsigned long pc; 1586 1587 pc = env->psw.addr - sw_bp_ilen; 1588 if (kvm_find_sw_breakpoint(CPU(cpu), pc)) { 1589 env->psw.addr = pc; 1590 return EXCP_DEBUG; 1591 } 1592 1593 return -ENOENT; 1594 } 1595 1596 void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info) 1597 { 1598 CPUS390XState *env = &S390_CPU(cs)->env; 1599 1600 /* Feat bit is set only if KVM supports sync for diag318 */ 1601 if (s390_has_feat(S390_FEAT_DIAG_318)) { 1602 env->diag318_info = diag318_info; 1603 cs->kvm_run->s.regs.diag318 = diag318_info; 1604 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318; 1605 /* 1606 * diag 318 info is zeroed during a clear reset and 1607 * diag 308 IPL subcodes. 1608 */ 1609 } 1610 } 1611 1612 static void handle_diag_318(S390CPU *cpu, struct kvm_run *run) 1613 { 1614 uint64_t reg = (run->s390_sieic.ipa & 0x00f0) >> 4; 1615 uint64_t diag318_info = run->s.regs.gprs[reg]; 1616 CPUState *t; 1617 1618 /* 1619 * DIAG 318 can only be enabled with KVM support. As such, let's 1620 * ensure a guest cannot execute this instruction erroneously. 1621 */ 1622 if (!s390_has_feat(S390_FEAT_DIAG_318)) { 1623 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1624 return; 1625 } 1626 1627 CPU_FOREACH(t) { 1628 run_on_cpu(t, s390_do_cpu_set_diag318, 1629 RUN_ON_CPU_HOST_ULONG(diag318_info)); 1630 } 1631 } 1632 1633 #define DIAG_KVM_CODE_MASK 0x000000000000ffff 1634 1635 static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) 1636 { 1637 int r = 0; 1638 uint16_t func_code; 1639 1640 /* 1641 * For any diagnose call we support, bits 48-63 of the resulting 1642 * address specify the function code; the remainder is ignored. 1643 */ 1644 func_code = decode_basedisp_rs(&cpu->env, ipb, NULL) & DIAG_KVM_CODE_MASK; 1645 switch (func_code) { 1646 case DIAG_TIMEREVENT: 1647 kvm_handle_diag_288(cpu, run); 1648 break; 1649 case DIAG_IPL: 1650 kvm_handle_diag_308(cpu, run); 1651 break; 1652 case DIAG_SET_CONTROL_PROGRAM_CODES: 1653 handle_diag_318(cpu, run); 1654 break; 1655 case DIAG_KVM_HYPERCALL: 1656 r = handle_hypercall(cpu, run); 1657 break; 1658 case DIAG_KVM_BREAKPOINT: 1659 r = handle_sw_breakpoint(cpu, run); 1660 break; 1661 default: 1662 trace_kvm_insn_diag(func_code); 1663 kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); 1664 break; 1665 } 1666 1667 return r; 1668 } 1669 1670 static int kvm_s390_handle_sigp(S390CPU *cpu, uint8_t ipa1, uint32_t ipb) 1671 { 1672 CPUS390XState *env = &cpu->env; 1673 const uint8_t r1 = ipa1 >> 4; 1674 const uint8_t r3 = ipa1 & 0x0f; 1675 int ret; 1676 uint8_t order; 1677 1678 /* get order code */ 1679 order = decode_basedisp_rs(env, ipb, NULL) & SIGP_ORDER_MASK; 1680 1681 ret = handle_sigp(env, order, r1, r3); 1682 setcc(cpu, ret); 1683 return 0; 1684 } 1685 1686 static int handle_instruction(S390CPU *cpu, struct kvm_run *run) 1687 { 1688 unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); 1689 uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff; 1690 int r = -1; 1691 1692 trace_kvm_insn(run->s390_sieic.ipa, run->s390_sieic.ipb); 1693 switch (ipa0) { 1694 case IPA0_B2: 1695 r = handle_b2(cpu, run, ipa1); 1696 break; 1697 case IPA0_B9: 1698 r = handle_b9(cpu, run, ipa1); 1699 break; 1700 case IPA0_EB: 1701 r = handle_eb(cpu, run, run->s390_sieic.ipb & 0xff); 1702 break; 1703 case IPA0_E3: 1704 r = handle_e3(cpu, run, run->s390_sieic.ipb & 0xff); 1705 break; 1706 case IPA0_DIAG: 1707 r = handle_diag(cpu, run, run->s390_sieic.ipb); 1708 break; 1709 case IPA0_SIGP: 1710 r = kvm_s390_handle_sigp(cpu, ipa1, run->s390_sieic.ipb); 1711 break; 1712 } 1713 1714 if (r < 0) { 1715 r = 0; 1716 kvm_s390_program_interrupt(cpu, PGM_OPERATION); 1717 } 1718 1719 return r; 1720 } 1721 1722 static void unmanageable_intercept(S390CPU *cpu, S390CrashReason reason, 1723 int pswoffset) 1724 { 1725 CPUState *cs = CPU(cpu); 1726 1727 s390_cpu_halt(cpu); 1728 cpu->env.crash_reason = reason; 1729 qemu_system_guest_panicked(cpu_get_crash_info(cs)); 1730 } 1731 1732 /* try to detect pgm check loops */ 1733 static int handle_oper_loop(S390CPU *cpu, struct kvm_run *run) 1734 { 1735 CPUState *cs = CPU(cpu); 1736 PSW oldpsw, newpsw; 1737 1738 newpsw.mask = ldq_phys(cs->as, cpu->env.psa + 1739 offsetof(LowCore, program_new_psw)); 1740 newpsw.addr = ldq_phys(cs->as, cpu->env.psa + 1741 offsetof(LowCore, program_new_psw) + 8); 1742 oldpsw.mask = run->psw_mask; 1743 oldpsw.addr = run->psw_addr; 1744 /* 1745 * Avoid endless loops of operation exceptions, if the pgm new 1746 * PSW will cause a new operation exception. 1747 * The heuristic checks if the pgm new psw is within 6 bytes before 1748 * the faulting psw address (with same DAT, AS settings) and the 1749 * new psw is not a wait psw and the fault was not triggered by 1750 * problem state. In that case go into crashed state. 1751 */ 1752 1753 if (oldpsw.addr - newpsw.addr <= 6 && 1754 !(newpsw.mask & PSW_MASK_WAIT) && 1755 !(oldpsw.mask & PSW_MASK_PSTATE) && 1756 (newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) && 1757 (newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT)) { 1758 unmanageable_intercept(cpu, S390_CRASH_REASON_OPINT_LOOP, 1759 offsetof(LowCore, program_new_psw)); 1760 return EXCP_HALTED; 1761 } 1762 return 0; 1763 } 1764 1765 static int handle_intercept(S390CPU *cpu) 1766 { 1767 CPUState *cs = CPU(cpu); 1768 struct kvm_run *run = cs->kvm_run; 1769 int icpt_code = run->s390_sieic.icptcode; 1770 int r = 0; 1771 1772 trace_kvm_intercept(icpt_code, (long)run->psw_addr); 1773 switch (icpt_code) { 1774 case ICPT_INSTRUCTION: 1775 case ICPT_PV_INSTR: 1776 case ICPT_PV_INSTR_NOTIFICATION: 1777 r = handle_instruction(cpu, run); 1778 break; 1779 case ICPT_PROGRAM: 1780 unmanageable_intercept(cpu, S390_CRASH_REASON_PGMINT_LOOP, 1781 offsetof(LowCore, program_new_psw)); 1782 r = EXCP_HALTED; 1783 break; 1784 case ICPT_EXT_INT: 1785 unmanageable_intercept(cpu, S390_CRASH_REASON_EXTINT_LOOP, 1786 offsetof(LowCore, external_new_psw)); 1787 r = EXCP_HALTED; 1788 break; 1789 case ICPT_WAITPSW: 1790 /* disabled wait, since enabled wait is handled in kernel */ 1791 s390_handle_wait(cpu); 1792 r = EXCP_HALTED; 1793 break; 1794 case ICPT_CPU_STOP: 1795 do_stop_interrupt(&cpu->env); 1796 r = EXCP_HALTED; 1797 break; 1798 case ICPT_OPEREXC: 1799 /* check for break points */ 1800 r = handle_sw_breakpoint(cpu, run); 1801 if (r == -ENOENT) { 1802 /* Then check for potential pgm check loops */ 1803 r = handle_oper_loop(cpu, run); 1804 if (r == 0) { 1805 kvm_s390_program_interrupt(cpu, PGM_OPERATION); 1806 } 1807 } 1808 break; 1809 case ICPT_SOFT_INTERCEPT: 1810 fprintf(stderr, "KVM unimplemented icpt SOFT\n"); 1811 exit(1); 1812 break; 1813 case ICPT_IO: 1814 fprintf(stderr, "KVM unimplemented icpt IO\n"); 1815 exit(1); 1816 break; 1817 default: 1818 fprintf(stderr, "Unknown intercept code: %d\n", icpt_code); 1819 exit(1); 1820 break; 1821 } 1822 1823 return r; 1824 } 1825 1826 static int handle_tsch(S390CPU *cpu) 1827 { 1828 CPUState *cs = CPU(cpu); 1829 struct kvm_run *run = cs->kvm_run; 1830 int ret; 1831 1832 ret = ioinst_handle_tsch(cpu, cpu->env.regs[1], run->s390_tsch.ipb, 1833 RA_IGNORED); 1834 if (ret < 0) { 1835 /* 1836 * Failure. 1837 * If an I/O interrupt had been dequeued, we have to reinject it. 1838 */ 1839 if (run->s390_tsch.dequeued) { 1840 s390_io_interrupt(run->s390_tsch.subchannel_id, 1841 run->s390_tsch.subchannel_nr, 1842 run->s390_tsch.io_int_parm, 1843 run->s390_tsch.io_int_word); 1844 } 1845 ret = 0; 1846 } 1847 return ret; 1848 } 1849 1850 static void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, uint8_t ar) 1851 { 1852 const MachineState *ms = MACHINE(qdev_get_machine()); 1853 uint16_t conf_cpus = 0, reserved_cpus = 0; 1854 SysIB_322 sysib; 1855 int del, i; 1856 1857 if (s390_is_pv()) { 1858 s390_cpu_pv_mem_read(cpu, 0, &sysib, sizeof(sysib)); 1859 } else if (s390_cpu_virt_mem_read(cpu, addr, ar, &sysib, sizeof(sysib))) { 1860 return; 1861 } 1862 /* Shift the stack of Extended Names to prepare for our own data */ 1863 memmove(&sysib.ext_names[1], &sysib.ext_names[0], 1864 sizeof(sysib.ext_names[0]) * (sysib.count - 1)); 1865 /* First virt level, that doesn't provide Ext Names delimits stack. It is 1866 * assumed it's not capable of managing Extended Names for lower levels. 1867 */ 1868 for (del = 1; del < sysib.count; del++) { 1869 if (!sysib.vm[del].ext_name_encoding || !sysib.ext_names[del][0]) { 1870 break; 1871 } 1872 } 1873 if (del < sysib.count) { 1874 memset(sysib.ext_names[del], 0, 1875 sizeof(sysib.ext_names[0]) * (sysib.count - del)); 1876 } 1877 1878 /* count the cpus and split them into configured and reserved ones */ 1879 for (i = 0; i < ms->possible_cpus->len; i++) { 1880 if (ms->possible_cpus->cpus[i].cpu) { 1881 conf_cpus++; 1882 } else { 1883 reserved_cpus++; 1884 } 1885 } 1886 sysib.vm[0].total_cpus = conf_cpus + reserved_cpus; 1887 sysib.vm[0].conf_cpus = conf_cpus; 1888 sysib.vm[0].reserved_cpus = reserved_cpus; 1889 1890 /* Insert short machine name in EBCDIC, padded with blanks */ 1891 if (qemu_name) { 1892 memset(sysib.vm[0].name, 0x40, sizeof(sysib.vm[0].name)); 1893 ebcdic_put(sysib.vm[0].name, qemu_name, MIN(sizeof(sysib.vm[0].name), 1894 strlen(qemu_name))); 1895 } 1896 sysib.vm[0].ext_name_encoding = 2; /* 2 = UTF-8 */ 1897 /* If hypervisor specifies zero Extended Name in STSI322 SYSIB, it's 1898 * considered by s390 as not capable of providing any Extended Name. 1899 * Therefore if no name was specified on qemu invocation, we go with the 1900 * same "KVMguest" default, which KVM has filled into short name field. 1901 */ 1902 strpadcpy((char *)sysib.ext_names[0], 1903 sizeof(sysib.ext_names[0]), 1904 qemu_name ?: "KVMguest", '\0'); 1905 1906 /* Insert UUID */ 1907 memcpy(sysib.vm[0].uuid, &qemu_uuid, sizeof(sysib.vm[0].uuid)); 1908 1909 if (s390_is_pv()) { 1910 s390_cpu_pv_mem_write(cpu, 0, &sysib, sizeof(sysib)); 1911 } else { 1912 s390_cpu_virt_mem_write(cpu, addr, ar, &sysib, sizeof(sysib)); 1913 } 1914 } 1915 1916 static int handle_stsi(S390CPU *cpu) 1917 { 1918 CPUState *cs = CPU(cpu); 1919 struct kvm_run *run = cs->kvm_run; 1920 1921 switch (run->s390_stsi.fc) { 1922 case 3: 1923 if (run->s390_stsi.sel1 != 2 || run->s390_stsi.sel2 != 2) { 1924 return 0; 1925 } 1926 insert_stsi_3_2_2(cpu, run->s390_stsi.addr, run->s390_stsi.ar); 1927 return 0; 1928 case 15: 1929 insert_stsi_15_1_x(cpu, run->s390_stsi.sel2, run->s390_stsi.addr, 1930 run->s390_stsi.ar, RA_IGNORED); 1931 return 0; 1932 default: 1933 return 0; 1934 } 1935 } 1936 1937 static int kvm_arch_handle_debug_exit(S390CPU *cpu) 1938 { 1939 CPUState *cs = CPU(cpu); 1940 struct kvm_run *run = cs->kvm_run; 1941 1942 int ret = 0; 1943 struct kvm_debug_exit_arch *arch_info = &run->debug.arch; 1944 1945 switch (arch_info->type) { 1946 case KVM_HW_WP_WRITE: 1947 if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { 1948 cs->watchpoint_hit = &hw_watchpoint; 1949 hw_watchpoint.vaddr = arch_info->addr; 1950 hw_watchpoint.flags = BP_MEM_WRITE; 1951 ret = EXCP_DEBUG; 1952 } 1953 break; 1954 case KVM_HW_BP: 1955 if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { 1956 ret = EXCP_DEBUG; 1957 } 1958 break; 1959 case KVM_SINGLESTEP: 1960 if (cs->singlestep_enabled) { 1961 ret = EXCP_DEBUG; 1962 } 1963 break; 1964 default: 1965 ret = -ENOSYS; 1966 } 1967 1968 return ret; 1969 } 1970 1971 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 1972 { 1973 S390CPU *cpu = S390_CPU(cs); 1974 int ret = 0; 1975 1976 qemu_mutex_lock_iothread(); 1977 1978 kvm_cpu_synchronize_state(cs); 1979 1980 switch (run->exit_reason) { 1981 case KVM_EXIT_S390_SIEIC: 1982 ret = handle_intercept(cpu); 1983 break; 1984 case KVM_EXIT_S390_RESET: 1985 s390_ipl_reset_request(cs, S390_RESET_REIPL); 1986 break; 1987 case KVM_EXIT_S390_TSCH: 1988 ret = handle_tsch(cpu); 1989 break; 1990 case KVM_EXIT_S390_STSI: 1991 ret = handle_stsi(cpu); 1992 break; 1993 case KVM_EXIT_DEBUG: 1994 ret = kvm_arch_handle_debug_exit(cpu); 1995 break; 1996 default: 1997 fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); 1998 break; 1999 } 2000 qemu_mutex_unlock_iothread(); 2001 2002 if (ret == 0) { 2003 ret = EXCP_INTERRUPT; 2004 } 2005 return ret; 2006 } 2007 2008 bool kvm_arch_stop_on_emulation_error(CPUState *cpu) 2009 { 2010 return true; 2011 } 2012 2013 void kvm_s390_enable_css_support(S390CPU *cpu) 2014 { 2015 int r; 2016 2017 /* Activate host kernel channel subsystem support. */ 2018 r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0); 2019 assert(r == 0); 2020 } 2021 2022 void kvm_arch_init_irq_routing(KVMState *s) 2023 { 2024 /* 2025 * Note that while irqchip capabilities generally imply that cpustates 2026 * are handled in-kernel, it is not true for s390 (yet); therefore, we 2027 * have to override the common code kvm_halt_in_kernel_allowed setting. 2028 */ 2029 if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { 2030 kvm_gsi_routing_allowed = true; 2031 kvm_halt_in_kernel_allowed = false; 2032 } 2033 } 2034 2035 int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch, 2036 int vq, bool assign) 2037 { 2038 struct kvm_ioeventfd kick = { 2039 .flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | 2040 KVM_IOEVENTFD_FLAG_DATAMATCH, 2041 .fd = event_notifier_get_fd(notifier), 2042 .datamatch = vq, 2043 .addr = sch, 2044 .len = 8, 2045 }; 2046 trace_kvm_assign_subch_ioeventfd(kick.fd, kick.addr, assign, 2047 kick.datamatch); 2048 if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) { 2049 return -ENOSYS; 2050 } 2051 if (!assign) { 2052 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; 2053 } 2054 return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); 2055 } 2056 2057 int kvm_s390_get_protected_dump(void) 2058 { 2059 return cap_protected_dump; 2060 } 2061 2062 int kvm_s390_get_ri(void) 2063 { 2064 return cap_ri; 2065 } 2066 2067 int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state) 2068 { 2069 struct kvm_mp_state mp_state = {}; 2070 int ret; 2071 2072 /* the kvm part might not have been initialized yet */ 2073 if (CPU(cpu)->kvm_state == NULL) { 2074 return 0; 2075 } 2076 2077 switch (cpu_state) { 2078 case S390_CPU_STATE_STOPPED: 2079 mp_state.mp_state = KVM_MP_STATE_STOPPED; 2080 break; 2081 case S390_CPU_STATE_CHECK_STOP: 2082 mp_state.mp_state = KVM_MP_STATE_CHECK_STOP; 2083 break; 2084 case S390_CPU_STATE_OPERATING: 2085 mp_state.mp_state = KVM_MP_STATE_OPERATING; 2086 break; 2087 case S390_CPU_STATE_LOAD: 2088 mp_state.mp_state = KVM_MP_STATE_LOAD; 2089 break; 2090 default: 2091 error_report("Requested CPU state is not a valid S390 CPU state: %u", 2092 cpu_state); 2093 exit(1); 2094 } 2095 2096 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); 2097 if (ret) { 2098 trace_kvm_failed_cpu_state_set(CPU(cpu)->cpu_index, cpu_state, 2099 strerror(-ret)); 2100 } 2101 2102 return ret; 2103 } 2104 2105 void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu) 2106 { 2107 unsigned int max_cpus = MACHINE(qdev_get_machine())->smp.max_cpus; 2108 struct kvm_s390_irq_state irq_state = { 2109 .buf = (uint64_t) cpu->irqstate, 2110 .len = VCPU_IRQ_BUF_SIZE(max_cpus), 2111 }; 2112 CPUState *cs = CPU(cpu); 2113 int32_t bytes; 2114 2115 if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) { 2116 return; 2117 } 2118 2119 bytes = kvm_vcpu_ioctl(cs, KVM_S390_GET_IRQ_STATE, &irq_state); 2120 if (bytes < 0) { 2121 cpu->irqstate_saved_size = 0; 2122 error_report("Migration of interrupt state failed"); 2123 return; 2124 } 2125 2126 cpu->irqstate_saved_size = bytes; 2127 } 2128 2129 int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu) 2130 { 2131 CPUState *cs = CPU(cpu); 2132 struct kvm_s390_irq_state irq_state = { 2133 .buf = (uint64_t) cpu->irqstate, 2134 .len = cpu->irqstate_saved_size, 2135 }; 2136 int r; 2137 2138 if (cpu->irqstate_saved_size == 0) { 2139 return 0; 2140 } 2141 2142 if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) { 2143 return -ENOSYS; 2144 } 2145 2146 r = kvm_vcpu_ioctl(cs, KVM_S390_SET_IRQ_STATE, &irq_state); 2147 if (r) { 2148 error_report("Setting interrupt state failed %d", r); 2149 } 2150 return r; 2151 } 2152 2153 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 2154 uint64_t address, uint32_t data, PCIDevice *dev) 2155 { 2156 S390PCIBusDevice *pbdev; 2157 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 2158 2159 if (!dev) { 2160 trace_kvm_msi_route_fixup("no pci device"); 2161 return -ENODEV; 2162 } 2163 2164 pbdev = s390_pci_find_dev_by_target(s390_get_phb(), DEVICE(dev)->id); 2165 if (!pbdev) { 2166 trace_kvm_msi_route_fixup("no zpci device"); 2167 return -ENODEV; 2168 } 2169 2170 route->type = KVM_IRQ_ROUTING_S390_ADAPTER; 2171 route->flags = 0; 2172 route->u.adapter.summary_addr = pbdev->routes.adapter.summary_addr; 2173 route->u.adapter.ind_addr = pbdev->routes.adapter.ind_addr; 2174 route->u.adapter.summary_offset = pbdev->routes.adapter.summary_offset; 2175 route->u.adapter.ind_offset = pbdev->routes.adapter.ind_offset + vec; 2176 route->u.adapter.adapter_id = pbdev->routes.adapter.adapter_id; 2177 return 0; 2178 } 2179 2180 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 2181 int vector, PCIDevice *dev) 2182 { 2183 return 0; 2184 } 2185 2186 int kvm_arch_release_virq_post(int virq) 2187 { 2188 return 0; 2189 } 2190 2191 int kvm_arch_msi_data_to_gsi(uint32_t data) 2192 { 2193 abort(); 2194 } 2195 2196 static int query_cpu_subfunc(S390FeatBitmap features) 2197 { 2198 struct kvm_s390_vm_cpu_subfunc prop = {}; 2199 struct kvm_device_attr attr = { 2200 .group = KVM_S390_VM_CPU_MODEL, 2201 .attr = KVM_S390_VM_CPU_MACHINE_SUBFUNC, 2202 .addr = (uint64_t) &prop, 2203 }; 2204 int rc; 2205 2206 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2207 if (rc) { 2208 return rc; 2209 } 2210 2211 /* 2212 * We're going to add all subfunctions now, if the corresponding feature 2213 * is available that unlocks the query functions. 2214 */ 2215 s390_add_from_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo); 2216 if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) { 2217 s390_add_from_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff); 2218 } 2219 if (test_bit(S390_FEAT_MSA, features)) { 2220 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac); 2221 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc); 2222 s390_add_from_feat_block(features, S390_FEAT_TYPE_KM, prop.km); 2223 s390_add_from_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd); 2224 s390_add_from_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd); 2225 } 2226 if (test_bit(S390_FEAT_MSA_EXT_3, features)) { 2227 s390_add_from_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo); 2228 } 2229 if (test_bit(S390_FEAT_MSA_EXT_4, features)) { 2230 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr); 2231 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf); 2232 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo); 2233 s390_add_from_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc); 2234 } 2235 if (test_bit(S390_FEAT_MSA_EXT_5, features)) { 2236 s390_add_from_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno); 2237 } 2238 if (test_bit(S390_FEAT_MSA_EXT_8, features)) { 2239 s390_add_from_feat_block(features, S390_FEAT_TYPE_KMA, prop.kma); 2240 } 2241 if (test_bit(S390_FEAT_MSA_EXT_9, features)) { 2242 s390_add_from_feat_block(features, S390_FEAT_TYPE_KDSA, prop.kdsa); 2243 } 2244 if (test_bit(S390_FEAT_ESORT_BASE, features)) { 2245 s390_add_from_feat_block(features, S390_FEAT_TYPE_SORTL, prop.sortl); 2246 } 2247 if (test_bit(S390_FEAT_DEFLATE_BASE, features)) { 2248 s390_add_from_feat_block(features, S390_FEAT_TYPE_DFLTCC, prop.dfltcc); 2249 } 2250 return 0; 2251 } 2252 2253 static int configure_cpu_subfunc(const S390FeatBitmap features) 2254 { 2255 struct kvm_s390_vm_cpu_subfunc prop = {}; 2256 struct kvm_device_attr attr = { 2257 .group = KVM_S390_VM_CPU_MODEL, 2258 .attr = KVM_S390_VM_CPU_PROCESSOR_SUBFUNC, 2259 .addr = (uint64_t) &prop, 2260 }; 2261 2262 if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2263 KVM_S390_VM_CPU_PROCESSOR_SUBFUNC)) { 2264 /* hardware support might be missing, IBC will handle most of this */ 2265 return 0; 2266 } 2267 2268 s390_fill_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo); 2269 if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) { 2270 s390_fill_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff); 2271 } 2272 if (test_bit(S390_FEAT_MSA, features)) { 2273 s390_fill_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac); 2274 s390_fill_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc); 2275 s390_fill_feat_block(features, S390_FEAT_TYPE_KM, prop.km); 2276 s390_fill_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd); 2277 s390_fill_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd); 2278 } 2279 if (test_bit(S390_FEAT_MSA_EXT_3, features)) { 2280 s390_fill_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo); 2281 } 2282 if (test_bit(S390_FEAT_MSA_EXT_4, features)) { 2283 s390_fill_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr); 2284 s390_fill_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf); 2285 s390_fill_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo); 2286 s390_fill_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc); 2287 } 2288 if (test_bit(S390_FEAT_MSA_EXT_5, features)) { 2289 s390_fill_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno); 2290 } 2291 if (test_bit(S390_FEAT_MSA_EXT_8, features)) { 2292 s390_fill_feat_block(features, S390_FEAT_TYPE_KMA, prop.kma); 2293 } 2294 if (test_bit(S390_FEAT_MSA_EXT_9, features)) { 2295 s390_fill_feat_block(features, S390_FEAT_TYPE_KDSA, prop.kdsa); 2296 } 2297 if (test_bit(S390_FEAT_ESORT_BASE, features)) { 2298 s390_fill_feat_block(features, S390_FEAT_TYPE_SORTL, prop.sortl); 2299 } 2300 if (test_bit(S390_FEAT_DEFLATE_BASE, features)) { 2301 s390_fill_feat_block(features, S390_FEAT_TYPE_DFLTCC, prop.dfltcc); 2302 } 2303 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 2304 } 2305 2306 static bool ap_available(void) 2307 { 2308 return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, 2309 KVM_S390_VM_CRYPTO_ENABLE_APIE); 2310 } 2311 2312 static bool ap_enabled(const S390FeatBitmap features) 2313 { 2314 return test_bit(S390_FEAT_AP, features); 2315 } 2316 2317 static bool uv_feat_supported(void) 2318 { 2319 return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2320 KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST); 2321 } 2322 2323 static int query_uv_feat_guest(S390FeatBitmap features) 2324 { 2325 struct kvm_s390_vm_cpu_uv_feat prop = {}; 2326 struct kvm_device_attr attr = { 2327 .group = KVM_S390_VM_CPU_MODEL, 2328 .attr = KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST, 2329 .addr = (uint64_t) &prop, 2330 }; 2331 int rc; 2332 2333 /* AP support check is currently the only user of the UV feature test */ 2334 if (!(uv_feat_supported() && ap_available())) { 2335 return 0; 2336 } 2337 2338 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2339 if (rc) { 2340 return rc; 2341 } 2342 2343 if (prop.ap) { 2344 set_bit(S390_FEAT_UV_FEAT_AP, features); 2345 } 2346 if (prop.ap_intr) { 2347 set_bit(S390_FEAT_UV_FEAT_AP_INTR, features); 2348 } 2349 2350 return 0; 2351 } 2352 2353 static int kvm_to_feat[][2] = { 2354 { KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP }, 2355 { KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 }, 2356 { KVM_S390_VM_CPU_FEAT_64BSCAO , S390_FEAT_SIE_64BSCAO }, 2357 { KVM_S390_VM_CPU_FEAT_SIIF, S390_FEAT_SIE_SIIF }, 2358 { KVM_S390_VM_CPU_FEAT_GPERE, S390_FEAT_SIE_GPERE }, 2359 { KVM_S390_VM_CPU_FEAT_GSLS, S390_FEAT_SIE_GSLS }, 2360 { KVM_S390_VM_CPU_FEAT_IB, S390_FEAT_SIE_IB }, 2361 { KVM_S390_VM_CPU_FEAT_CEI, S390_FEAT_SIE_CEI }, 2362 { KVM_S390_VM_CPU_FEAT_IBS, S390_FEAT_SIE_IBS }, 2363 { KVM_S390_VM_CPU_FEAT_SKEY, S390_FEAT_SIE_SKEY }, 2364 { KVM_S390_VM_CPU_FEAT_CMMA, S390_FEAT_SIE_CMMA }, 2365 { KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI}, 2366 { KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF}, 2367 { KVM_S390_VM_CPU_FEAT_KSS, S390_FEAT_SIE_KSS}, 2368 }; 2369 2370 static int query_cpu_feat(S390FeatBitmap features) 2371 { 2372 struct kvm_s390_vm_cpu_feat prop = {}; 2373 struct kvm_device_attr attr = { 2374 .group = KVM_S390_VM_CPU_MODEL, 2375 .attr = KVM_S390_VM_CPU_MACHINE_FEAT, 2376 .addr = (uint64_t) &prop, 2377 }; 2378 int rc; 2379 int i; 2380 2381 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2382 if (rc) { 2383 return rc; 2384 } 2385 2386 for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) { 2387 if (test_be_bit(kvm_to_feat[i][0], (uint8_t *) prop.feat)) { 2388 set_bit(kvm_to_feat[i][1], features); 2389 } 2390 } 2391 return 0; 2392 } 2393 2394 static int configure_cpu_feat(const S390FeatBitmap features) 2395 { 2396 struct kvm_s390_vm_cpu_feat prop = {}; 2397 struct kvm_device_attr attr = { 2398 .group = KVM_S390_VM_CPU_MODEL, 2399 .attr = KVM_S390_VM_CPU_PROCESSOR_FEAT, 2400 .addr = (uint64_t) &prop, 2401 }; 2402 int i; 2403 2404 for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) { 2405 if (test_bit(kvm_to_feat[i][1], features)) { 2406 set_be_bit(kvm_to_feat[i][0], (uint8_t *) prop.feat); 2407 } 2408 } 2409 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 2410 } 2411 2412 bool kvm_s390_cpu_models_supported(void) 2413 { 2414 if (!cpu_model_allowed()) { 2415 /* compatibility machines interfere with the cpu model */ 2416 return false; 2417 } 2418 return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2419 KVM_S390_VM_CPU_MACHINE) && 2420 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2421 KVM_S390_VM_CPU_PROCESSOR) && 2422 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2423 KVM_S390_VM_CPU_MACHINE_FEAT) && 2424 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2425 KVM_S390_VM_CPU_PROCESSOR_FEAT) && 2426 kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, 2427 KVM_S390_VM_CPU_MACHINE_SUBFUNC); 2428 } 2429 2430 void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp) 2431 { 2432 struct kvm_s390_vm_cpu_machine prop = {}; 2433 struct kvm_device_attr attr = { 2434 .group = KVM_S390_VM_CPU_MODEL, 2435 .attr = KVM_S390_VM_CPU_MACHINE, 2436 .addr = (uint64_t) &prop, 2437 }; 2438 uint16_t unblocked_ibc = 0, cpu_type = 0; 2439 int rc; 2440 2441 memset(model, 0, sizeof(*model)); 2442 2443 if (!kvm_s390_cpu_models_supported()) { 2444 error_setg(errp, "KVM doesn't support CPU models"); 2445 return; 2446 } 2447 2448 /* query the basic cpu model properties */ 2449 rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); 2450 if (rc) { 2451 error_setg(errp, "KVM: Error querying host CPU model: %d", rc); 2452 return; 2453 } 2454 2455 cpu_type = cpuid_type(prop.cpuid); 2456 if (has_ibc(prop.ibc)) { 2457 model->lowest_ibc = lowest_ibc(prop.ibc); 2458 unblocked_ibc = unblocked_ibc(prop.ibc); 2459 } 2460 model->cpu_id = cpuid_id(prop.cpuid); 2461 model->cpu_id_format = cpuid_format(prop.cpuid); 2462 model->cpu_ver = 0xff; 2463 2464 /* get supported cpu features indicated via STFL(E) */ 2465 s390_add_from_feat_block(model->features, S390_FEAT_TYPE_STFL, 2466 (uint8_t *) prop.fac_mask); 2467 /* dat-enhancement facility 2 has no bit but was introduced with stfle */ 2468 if (test_bit(S390_FEAT_STFLE, model->features)) { 2469 set_bit(S390_FEAT_DAT_ENH_2, model->features); 2470 } 2471 /* get supported cpu features indicated e.g. via SCLP */ 2472 rc = query_cpu_feat(model->features); 2473 if (rc) { 2474 error_setg(errp, "KVM: Error querying CPU features: %d", rc); 2475 return; 2476 } 2477 /* get supported cpu subfunctions indicated via query / test bit */ 2478 rc = query_cpu_subfunc(model->features); 2479 if (rc) { 2480 error_setg(errp, "KVM: Error querying CPU subfunctions: %d", rc); 2481 return; 2482 } 2483 2484 /* PTFF subfunctions might be indicated although kernel support missing */ 2485 if (!test_bit(S390_FEAT_MULTIPLE_EPOCH, model->features)) { 2486 clear_bit(S390_FEAT_PTFF_QSIE, model->features); 2487 clear_bit(S390_FEAT_PTFF_QTOUE, model->features); 2488 clear_bit(S390_FEAT_PTFF_STOE, model->features); 2489 clear_bit(S390_FEAT_PTFF_STOUE, model->features); 2490 } 2491 2492 /* with cpu model support, CMM is only indicated if really available */ 2493 if (kvm_s390_cmma_available()) { 2494 set_bit(S390_FEAT_CMM, model->features); 2495 } else { 2496 /* no cmm -> no cmm nt */ 2497 clear_bit(S390_FEAT_CMM_NT, model->features); 2498 } 2499 2500 /* bpb needs kernel support for migration, VSIE and reset */ 2501 if (!kvm_check_extension(kvm_state, KVM_CAP_S390_BPB)) { 2502 clear_bit(S390_FEAT_BPB, model->features); 2503 } 2504 2505 /* 2506 * If we have support for protected virtualization, indicate 2507 * the protected virtualization IPL unpack facility. 2508 */ 2509 if (cap_protected) { 2510 set_bit(S390_FEAT_UNPACK, model->features); 2511 } 2512 2513 /* 2514 * If we have kernel support for CPU Topology indicate the 2515 * configuration-topology facility. 2516 */ 2517 if (kvm_check_extension(kvm_state, KVM_CAP_S390_CPU_TOPOLOGY)) { 2518 set_bit(S390_FEAT_CONFIGURATION_TOPOLOGY, model->features); 2519 } 2520 2521 /* We emulate a zPCI bus and AEN, therefore we don't need HW support */ 2522 set_bit(S390_FEAT_ZPCI, model->features); 2523 set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features); 2524 2525 if (s390_known_cpu_type(cpu_type)) { 2526 /* we want the exact model, even if some features are missing */ 2527 model->def = s390_find_cpu_def(cpu_type, ibc_gen(unblocked_ibc), 2528 ibc_ec_ga(unblocked_ibc), NULL); 2529 } else { 2530 /* model unknown, e.g. too new - search using features */ 2531 model->def = s390_find_cpu_def(0, ibc_gen(unblocked_ibc), 2532 ibc_ec_ga(unblocked_ibc), 2533 model->features); 2534 } 2535 if (!model->def) { 2536 error_setg(errp, "KVM: host CPU model could not be identified"); 2537 return; 2538 } 2539 /* for now, we can only provide the AP feature with HW support */ 2540 if (ap_available()) { 2541 set_bit(S390_FEAT_AP, model->features); 2542 } 2543 2544 /* 2545 * Extended-Length SCCB is handled entirely within QEMU. 2546 * For PV guests this is completely fenced by the Ultravisor, as Service 2547 * Call error checking and STFLE interpretation are handled via SIE. 2548 */ 2549 set_bit(S390_FEAT_EXTENDED_LENGTH_SCCB, model->features); 2550 2551 if (kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) { 2552 set_bit(S390_FEAT_DIAG_318, model->features); 2553 } 2554 2555 /* Test for Ultravisor features that influence secure guest behavior */ 2556 query_uv_feat_guest(model->features); 2557 2558 /* strip of features that are not part of the maximum model */ 2559 bitmap_and(model->features, model->features, model->def->full_feat, 2560 S390_FEAT_MAX); 2561 } 2562 2563 static int configure_uv_feat_guest(const S390FeatBitmap features) 2564 { 2565 struct kvm_s390_vm_cpu_uv_feat uv_feat = {}; 2566 struct kvm_device_attr attribute = { 2567 .group = KVM_S390_VM_CPU_MODEL, 2568 .attr = KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST, 2569 .addr = (__u64) &uv_feat, 2570 }; 2571 2572 /* AP support check is currently the only user of the UV feature test */ 2573 if (!(uv_feat_supported() && ap_enabled(features))) { 2574 return 0; 2575 } 2576 2577 if (test_bit(S390_FEAT_UV_FEAT_AP, features)) { 2578 uv_feat.ap = 1; 2579 } 2580 if (test_bit(S390_FEAT_UV_FEAT_AP_INTR, features)) { 2581 uv_feat.ap_intr = 1; 2582 } 2583 2584 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); 2585 } 2586 2587 static void kvm_s390_configure_apie(bool interpret) 2588 { 2589 uint64_t attr = interpret ? KVM_S390_VM_CRYPTO_ENABLE_APIE : 2590 KVM_S390_VM_CRYPTO_DISABLE_APIE; 2591 2592 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { 2593 kvm_s390_set_crypto_attr(attr); 2594 } 2595 } 2596 2597 void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp) 2598 { 2599 struct kvm_s390_vm_cpu_processor prop = { 2600 .fac_list = { 0 }, 2601 }; 2602 struct kvm_device_attr attr = { 2603 .group = KVM_S390_VM_CPU_MODEL, 2604 .attr = KVM_S390_VM_CPU_PROCESSOR, 2605 .addr = (uint64_t) &prop, 2606 }; 2607 int rc; 2608 2609 if (!model) { 2610 /* compatibility handling if cpu models are disabled */ 2611 if (kvm_s390_cmma_available()) { 2612 kvm_s390_enable_cmma(); 2613 } 2614 return; 2615 } 2616 if (!kvm_s390_cpu_models_supported()) { 2617 error_setg(errp, "KVM doesn't support CPU models"); 2618 return; 2619 } 2620 prop.cpuid = s390_cpuid_from_cpu_model(model); 2621 prop.ibc = s390_ibc_from_cpu_model(model); 2622 /* configure cpu features indicated via STFL(e) */ 2623 s390_fill_feat_block(model->features, S390_FEAT_TYPE_STFL, 2624 (uint8_t *) prop.fac_list); 2625 rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); 2626 if (rc) { 2627 error_setg(errp, "KVM: Error configuring the CPU model: %d", rc); 2628 return; 2629 } 2630 /* configure cpu features indicated e.g. via SCLP */ 2631 rc = configure_cpu_feat(model->features); 2632 if (rc) { 2633 error_setg(errp, "KVM: Error configuring CPU features: %d", rc); 2634 return; 2635 } 2636 /* configure cpu subfunctions indicated via query / test bit */ 2637 rc = configure_cpu_subfunc(model->features); 2638 if (rc) { 2639 error_setg(errp, "KVM: Error configuring CPU subfunctions: %d", rc); 2640 return; 2641 } 2642 /* enable CMM via CMMA */ 2643 if (test_bit(S390_FEAT_CMM, model->features)) { 2644 kvm_s390_enable_cmma(); 2645 } 2646 2647 if (ap_enabled(model->features)) { 2648 kvm_s390_configure_apie(true); 2649 } 2650 2651 /* configure UV-features for the guest indicated via query / test_bit */ 2652 rc = configure_uv_feat_guest(model->features); 2653 if (rc) { 2654 error_setg(errp, "KVM: Error configuring CPU UV features %d", rc); 2655 return; 2656 } 2657 } 2658 2659 void kvm_s390_restart_interrupt(S390CPU *cpu) 2660 { 2661 struct kvm_s390_irq irq = { 2662 .type = KVM_S390_RESTART, 2663 }; 2664 2665 kvm_s390_vcpu_interrupt(cpu, &irq); 2666 } 2667 2668 void kvm_s390_stop_interrupt(S390CPU *cpu) 2669 { 2670 struct kvm_s390_irq irq = { 2671 .type = KVM_S390_SIGP_STOP, 2672 }; 2673 2674 kvm_s390_vcpu_interrupt(cpu, &irq); 2675 } 2676 2677 bool kvm_arch_cpu_check_are_resettable(void) 2678 { 2679 return true; 2680 } 2681 2682 int kvm_s390_get_zpci_op(void) 2683 { 2684 return cap_zpci_op; 2685 } 2686 2687 int kvm_s390_topology_set_mtcr(uint64_t attr) 2688 { 2689 struct kvm_device_attr attribute = { 2690 .group = KVM_S390_VM_CPU_TOPOLOGY, 2691 .attr = attr, 2692 }; 2693 2694 if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { 2695 return 0; 2696 } 2697 if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) { 2698 return -ENOTSUP; 2699 } 2700 2701 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); 2702 } 2703 2704 void kvm_arch_accel_class_init(ObjectClass *oc) 2705 { 2706 } 2707