1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * in-kernel handling for sie intercepts 4 * 5 * Copyright IBM Corp. 2008, 2020 6 * 7 * Author(s): Carsten Otte <cotte@de.ibm.com> 8 * Christian Borntraeger <borntraeger@de.ibm.com> 9 */ 10 11 #include <linux/kvm_host.h> 12 #include <linux/errno.h> 13 #include <linux/pagemap.h> 14 15 #include <asm/asm-offsets.h> 16 #include <asm/irq.h> 17 #include <asm/sysinfo.h> 18 #include <asm/uv.h> 19 20 #include "kvm-s390.h" 21 #include "gaccess.h" 22 #include "trace.h" 23 #include "trace-s390.h" 24 25 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu) 26 { 27 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 28 u8 ilen = 0; 29 30 switch (vcpu->arch.sie_block->icptcode) { 31 case ICPT_INST: 32 case ICPT_INSTPROGI: 33 case ICPT_OPEREXC: 34 case ICPT_PARTEXEC: 35 case ICPT_IOINST: 36 /* instruction only stored for these icptcodes */ 37 ilen = insn_length(vcpu->arch.sie_block->ipa >> 8); 38 /* Use the length of the EXECUTE instruction if necessary */ 39 if (sie_block->icptstatus & 1) { 40 ilen = (sie_block->icptstatus >> 4) & 0x6; 41 if (!ilen) 42 ilen = 4; 43 } 44 break; 45 case ICPT_PROGI: 46 /* bit 1+2 of pgmilc are the ilc, so we directly get ilen */ 47 ilen = vcpu->arch.sie_block->pgmilc & 0x6; 48 break; 49 } 50 return ilen; 51 } 52 53 static int handle_stop(struct kvm_vcpu *vcpu) 54 { 55 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 56 int rc = 0; 57 uint8_t flags, stop_pending; 58 59 vcpu->stat.exit_stop_request++; 60 61 /* delay the stop if any non-stop irq is pending */ 62 if (kvm_s390_vcpu_has_irq(vcpu, 1)) 63 return 0; 64 65 /* avoid races with the injection/SIGP STOP code */ 66 spin_lock(&li->lock); 67 flags = li->irq.stop.flags; 68 stop_pending = kvm_s390_is_stop_irq_pending(vcpu); 69 spin_unlock(&li->lock); 70 71 trace_kvm_s390_stop_request(stop_pending, flags); 72 if (!stop_pending) 73 return 0; 74 75 if (flags & KVM_S390_STOP_FLAG_STORE_STATUS) { 76 rc = kvm_s390_vcpu_store_status(vcpu, 77 KVM_S390_STORE_STATUS_NOADDR); 78 if (rc) 79 return rc; 80 } 81 82 /* 83 * no need to check the return value of vcpu_stop as it can only have 84 * an error for protvirt, but protvirt means user cpu state 85 */ 86 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) 87 kvm_s390_vcpu_stop(vcpu); 88 return -EOPNOTSUPP; 89 } 90 91 static int handle_validity(struct kvm_vcpu *vcpu) 92 { 93 int viwhy = vcpu->arch.sie_block->ipb >> 16; 94 95 vcpu->stat.exit_validity++; 96 trace_kvm_s390_intercept_validity(vcpu, viwhy); 97 KVM_EVENT(3, "validity intercept 0x%x for pid %u (kvm 0x%pK)", viwhy, 98 current->pid, vcpu->kvm); 99 100 /* do not warn on invalid runtime instrumentation mode */ 101 WARN_ONCE(viwhy != 0x44, "kvm: unhandled validity intercept 0x%x\n", 102 viwhy); 103 return -EINVAL; 104 } 105 106 static int handle_instruction(struct kvm_vcpu *vcpu) 107 { 108 vcpu->stat.exit_instruction++; 109 trace_kvm_s390_intercept_instruction(vcpu, 110 vcpu->arch.sie_block->ipa, 111 vcpu->arch.sie_block->ipb); 112 113 switch (vcpu->arch.sie_block->ipa >> 8) { 114 case 0x01: 115 return kvm_s390_handle_01(vcpu); 116 case 0x82: 117 return kvm_s390_handle_lpsw(vcpu); 118 case 0x83: 119 return kvm_s390_handle_diag(vcpu); 120 case 0xaa: 121 return kvm_s390_handle_aa(vcpu); 122 case 0xae: 123 return kvm_s390_handle_sigp(vcpu); 124 case 0xb2: 125 return kvm_s390_handle_b2(vcpu); 126 case 0xb6: 127 return kvm_s390_handle_stctl(vcpu); 128 case 0xb7: 129 return kvm_s390_handle_lctl(vcpu); 130 case 0xb9: 131 return kvm_s390_handle_b9(vcpu); 132 case 0xe3: 133 return kvm_s390_handle_e3(vcpu); 134 case 0xe5: 135 return kvm_s390_handle_e5(vcpu); 136 case 0xeb: 137 return kvm_s390_handle_eb(vcpu); 138 default: 139 return -EOPNOTSUPP; 140 } 141 } 142 143 static int inject_prog_on_prog_intercept(struct kvm_vcpu *vcpu) 144 { 145 struct kvm_s390_pgm_info pgm_info = { 146 .code = vcpu->arch.sie_block->iprcc, 147 /* the PSW has already been rewound */ 148 .flags = KVM_S390_PGM_FLAGS_NO_REWIND, 149 }; 150 151 switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) { 152 case PGM_AFX_TRANSLATION: 153 case PGM_ASX_TRANSLATION: 154 case PGM_EX_TRANSLATION: 155 case PGM_LFX_TRANSLATION: 156 case PGM_LSTE_SEQUENCE: 157 case PGM_LSX_TRANSLATION: 158 case PGM_LX_TRANSLATION: 159 case PGM_PRIMARY_AUTHORITY: 160 case PGM_SECONDARY_AUTHORITY: 161 case PGM_SPACE_SWITCH: 162 pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc; 163 break; 164 case PGM_ALEN_TRANSLATION: 165 case PGM_ALE_SEQUENCE: 166 case PGM_ASTE_INSTANCE: 167 case PGM_ASTE_SEQUENCE: 168 case PGM_ASTE_VALIDITY: 169 case PGM_EXTENDED_AUTHORITY: 170 pgm_info.exc_access_id = vcpu->arch.sie_block->eai; 171 break; 172 case PGM_ASCE_TYPE: 173 case PGM_PAGE_TRANSLATION: 174 case PGM_REGION_FIRST_TRANS: 175 case PGM_REGION_SECOND_TRANS: 176 case PGM_REGION_THIRD_TRANS: 177 case PGM_SEGMENT_TRANSLATION: 178 pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc; 179 pgm_info.exc_access_id = vcpu->arch.sie_block->eai; 180 pgm_info.op_access_id = vcpu->arch.sie_block->oai; 181 break; 182 case PGM_MONITOR: 183 pgm_info.mon_class_nr = vcpu->arch.sie_block->mcn; 184 pgm_info.mon_code = vcpu->arch.sie_block->tecmc; 185 break; 186 case PGM_VECTOR_PROCESSING: 187 case PGM_DATA: 188 pgm_info.data_exc_code = vcpu->arch.sie_block->dxc; 189 break; 190 case PGM_PROTECTION: 191 pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc; 192 pgm_info.exc_access_id = vcpu->arch.sie_block->eai; 193 break; 194 default: 195 break; 196 } 197 198 if (vcpu->arch.sie_block->iprcc & PGM_PER) { 199 pgm_info.per_code = vcpu->arch.sie_block->perc; 200 pgm_info.per_atmid = vcpu->arch.sie_block->peratmid; 201 pgm_info.per_address = vcpu->arch.sie_block->peraddr; 202 pgm_info.per_access_id = vcpu->arch.sie_block->peraid; 203 } 204 return kvm_s390_inject_prog_irq(vcpu, &pgm_info); 205 } 206 207 /* 208 * restore ITDB to program-interruption TDB in guest lowcore 209 * and set TX abort indication if required 210 */ 211 static int handle_itdb(struct kvm_vcpu *vcpu) 212 { 213 struct kvm_s390_itdb *itdb; 214 int rc; 215 216 if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu)) 217 return 0; 218 if (current->thread.per_flags & PER_FLAG_NO_TE) 219 return 0; 220 itdb = phys_to_virt(vcpu->arch.sie_block->itdba); 221 rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb)); 222 if (rc) 223 return rc; 224 memset(itdb, 0, sizeof(*itdb)); 225 226 return 0; 227 } 228 229 #define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER) 230 231 static int handle_prog(struct kvm_vcpu *vcpu) 232 { 233 psw_t psw; 234 int rc; 235 236 vcpu->stat.exit_program_interruption++; 237 238 /* 239 * Intercept 8 indicates a loop of specification exceptions 240 * for protected guests. 241 */ 242 if (kvm_s390_pv_cpu_is_protected(vcpu)) 243 return -EOPNOTSUPP; 244 245 if (guestdbg_enabled(vcpu) && per_event(vcpu)) { 246 rc = kvm_s390_handle_per_event(vcpu); 247 if (rc) 248 return rc; 249 /* the interrupt might have been filtered out completely */ 250 if (vcpu->arch.sie_block->iprcc == 0) 251 return 0; 252 } 253 254 trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc); 255 if (vcpu->arch.sie_block->iprcc == PGM_SPECIFICATION) { 256 rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &psw, sizeof(psw_t)); 257 if (rc) 258 return rc; 259 /* Avoid endless loops of specification exceptions */ 260 if (!is_valid_psw(&psw)) 261 return -EOPNOTSUPP; 262 } 263 rc = handle_itdb(vcpu); 264 if (rc) 265 return rc; 266 267 return inject_prog_on_prog_intercept(vcpu); 268 } 269 270 /** 271 * handle_external_interrupt - used for external interruption interceptions 272 * @vcpu: virtual cpu 273 * 274 * This interception occurs if: 275 * - the CPUSTAT_EXT_INT bit was already set when the external interrupt 276 * occurred. In this case, the interrupt needs to be injected manually to 277 * preserve interrupt priority. 278 * - the external new PSW has external interrupts enabled, which will cause an 279 * interruption loop. We drop to userspace in this case. 280 * 281 * The latter case can be detected by inspecting the external mask bit in the 282 * external new psw. 283 * 284 * Under PV, only the latter case can occur, since interrupt priorities are 285 * handled in the ultravisor. 286 */ 287 static int handle_external_interrupt(struct kvm_vcpu *vcpu) 288 { 289 u16 eic = vcpu->arch.sie_block->eic; 290 struct kvm_s390_irq irq; 291 psw_t newpsw; 292 int rc; 293 294 vcpu->stat.exit_external_interrupt++; 295 296 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 297 newpsw = vcpu->arch.sie_block->gpsw; 298 } else { 299 rc = read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &newpsw, sizeof(psw_t)); 300 if (rc) 301 return rc; 302 } 303 304 /* 305 * Clock comparator or timer interrupt with external interrupt enabled 306 * will cause interrupt loop. Drop to userspace. 307 */ 308 if ((eic == EXT_IRQ_CLK_COMP || eic == EXT_IRQ_CPU_TIMER) && 309 (newpsw.mask & PSW_MASK_EXT)) 310 return -EOPNOTSUPP; 311 312 switch (eic) { 313 case EXT_IRQ_CLK_COMP: 314 irq.type = KVM_S390_INT_CLOCK_COMP; 315 break; 316 case EXT_IRQ_CPU_TIMER: 317 irq.type = KVM_S390_INT_CPU_TIMER; 318 break; 319 case EXT_IRQ_EXTERNAL_CALL: 320 irq.type = KVM_S390_INT_EXTERNAL_CALL; 321 irq.u.extcall.code = vcpu->arch.sie_block->extcpuaddr; 322 rc = kvm_s390_inject_vcpu(vcpu, &irq); 323 /* ignore if another external call is already pending */ 324 if (rc == -EBUSY) 325 return 0; 326 return rc; 327 default: 328 return -EOPNOTSUPP; 329 } 330 331 return kvm_s390_inject_vcpu(vcpu, &irq); 332 } 333 334 /** 335 * handle_mvpg_pei - Handle MOVE PAGE partial execution interception. 336 * @vcpu: virtual cpu 337 * 338 * This interception can only happen for guests with DAT disabled and 339 * addresses that are currently not mapped in the host. Thus we try to 340 * set up the mappings for the corresponding user pages here (or throw 341 * addressing exceptions in case of illegal guest addresses). 342 */ 343 static int handle_mvpg_pei(struct kvm_vcpu *vcpu) 344 { 345 unsigned long srcaddr, dstaddr; 346 int reg1, reg2, rc; 347 348 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 349 350 /* Ensure that the source is paged-in, no actual access -> no key checking */ 351 rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg2], 352 reg2, &srcaddr, GACC_FETCH, 0); 353 if (rc) 354 return kvm_s390_inject_prog_cond(vcpu, rc); 355 rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0); 356 if (rc != 0) 357 return rc; 358 359 /* Ensure that the source is paged-in, no actual access -> no key checking */ 360 rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg1], 361 reg1, &dstaddr, GACC_STORE, 0); 362 if (rc) 363 return kvm_s390_inject_prog_cond(vcpu, rc); 364 rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1); 365 if (rc != 0) 366 return rc; 367 368 kvm_s390_retry_instr(vcpu); 369 370 return 0; 371 } 372 373 static int handle_partial_execution(struct kvm_vcpu *vcpu) 374 { 375 vcpu->stat.exit_pei++; 376 377 if (vcpu->arch.sie_block->ipa == 0xb254) /* MVPG */ 378 return handle_mvpg_pei(vcpu); 379 if (vcpu->arch.sie_block->ipa >> 8 == 0xae) /* SIGP */ 380 return kvm_s390_handle_sigp_pei(vcpu); 381 382 return -EOPNOTSUPP; 383 } 384 385 /* 386 * Handle the sthyi instruction that provides the guest with system 387 * information, like current CPU resources available at each level of 388 * the machine. 389 */ 390 int handle_sthyi(struct kvm_vcpu *vcpu) 391 { 392 int reg1, reg2, cc = 0, r = 0; 393 u64 code, addr, rc = 0; 394 struct sthyi_sctns *sctns = NULL; 395 396 if (!test_kvm_facility(vcpu->kvm, 74)) 397 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); 398 399 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 400 code = vcpu->run->s.regs.gprs[reg1]; 401 addr = vcpu->run->s.regs.gprs[reg2]; 402 403 vcpu->stat.instruction_sthyi++; 404 VCPU_EVENT(vcpu, 3, "STHYI: fc: %llu addr: 0x%016llx", code, addr); 405 trace_kvm_s390_handle_sthyi(vcpu, code, addr); 406 407 if (reg1 == reg2 || reg1 & 1 || reg2 & 1) 408 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 409 410 if (code & 0xffff) { 411 cc = 3; 412 rc = 4; 413 goto out; 414 } 415 416 if (!kvm_s390_pv_cpu_is_protected(vcpu) && (addr & ~PAGE_MASK)) 417 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 418 419 sctns = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT); 420 if (!sctns) 421 return -ENOMEM; 422 423 cc = sthyi_fill(sctns, &rc); 424 if (cc < 0) { 425 free_page((unsigned long)sctns); 426 return cc; 427 } 428 out: 429 if (!cc) { 430 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 431 memcpy(sida_addr(vcpu->arch.sie_block), sctns, PAGE_SIZE); 432 } else { 433 r = write_guest(vcpu, addr, reg2, sctns, PAGE_SIZE); 434 if (r) { 435 free_page((unsigned long)sctns); 436 return kvm_s390_inject_prog_cond(vcpu, r); 437 } 438 } 439 } 440 441 free_page((unsigned long)sctns); 442 vcpu->run->s.regs.gprs[reg2 + 1] = rc; 443 kvm_s390_set_psw_cc(vcpu, cc); 444 return r; 445 } 446 447 static int handle_operexc(struct kvm_vcpu *vcpu) 448 { 449 psw_t oldpsw, newpsw; 450 int rc; 451 452 vcpu->stat.exit_operation_exception++; 453 trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa, 454 vcpu->arch.sie_block->ipb); 455 456 if (vcpu->arch.sie_block->ipa == 0xb256) 457 return handle_sthyi(vcpu); 458 459 if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0) 460 return -EOPNOTSUPP; 461 rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &newpsw, sizeof(psw_t)); 462 if (rc) 463 return rc; 464 /* 465 * Avoid endless loops of operation exceptions, if the pgm new 466 * PSW will cause a new operation exception. 467 * The heuristic checks if the pgm new psw is within 6 bytes before 468 * the faulting psw address (with same DAT, AS settings) and the 469 * new psw is not a wait psw and the fault was not triggered by 470 * problem state. 471 */ 472 oldpsw = vcpu->arch.sie_block->gpsw; 473 if (oldpsw.addr - newpsw.addr <= 6 && 474 !(newpsw.mask & PSW_MASK_WAIT) && 475 !(oldpsw.mask & PSW_MASK_PSTATE) && 476 (newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) && 477 (newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT)) 478 return -EOPNOTSUPP; 479 480 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); 481 } 482 483 static int handle_pv_spx(struct kvm_vcpu *vcpu) 484 { 485 u32 pref = *(u32 *)sida_addr(vcpu->arch.sie_block); 486 487 kvm_s390_set_prefix(vcpu, pref); 488 trace_kvm_s390_handle_prefix(vcpu, 1, pref); 489 return 0; 490 } 491 492 static int handle_pv_sclp(struct kvm_vcpu *vcpu) 493 { 494 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; 495 496 spin_lock(&fi->lock); 497 /* 498 * 2 cases: 499 * a: an sccb answering interrupt was already pending or in flight. 500 * As the sccb value is not known we can simply set some value to 501 * trigger delivery of a saved SCCB. UV will then use its saved 502 * copy of the SCCB value. 503 * b: an error SCCB interrupt needs to be injected so we also inject 504 * a fake SCCB address. Firmware will use the proper one. 505 * This makes sure, that both errors and real sccb returns will only 506 * be delivered after a notification intercept (instruction has 507 * finished) but not after others. 508 */ 509 fi->srv_signal.ext_params |= 0x43000; 510 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); 511 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs); 512 spin_unlock(&fi->lock); 513 return 0; 514 } 515 516 static int handle_pv_uvc(struct kvm_vcpu *vcpu) 517 { 518 struct uv_cb_share *guest_uvcb = sida_addr(vcpu->arch.sie_block); 519 struct uv_cb_cts uvcb = { 520 .header.cmd = UVC_CMD_UNPIN_PAGE_SHARED, 521 .header.len = sizeof(uvcb), 522 .guest_handle = kvm_s390_pv_get_handle(vcpu->kvm), 523 .gaddr = guest_uvcb->paddr, 524 }; 525 int rc; 526 527 if (guest_uvcb->header.cmd != UVC_CMD_REMOVE_SHARED_ACCESS) { 528 WARN_ONCE(1, "Unexpected notification intercept for UVC 0x%x\n", 529 guest_uvcb->header.cmd); 530 return 0; 531 } 532 rc = gmap_make_secure(vcpu->arch.gmap, uvcb.gaddr, &uvcb); 533 /* 534 * If the unpin did not succeed, the guest will exit again for the UVC 535 * and we will retry the unpin. 536 */ 537 if (rc == -EINVAL) 538 return 0; 539 /* 540 * If we got -EAGAIN here, we simply return it. It will eventually 541 * get propagated all the way to userspace, which should then try 542 * again. 543 */ 544 return rc; 545 } 546 547 static int handle_pv_notification(struct kvm_vcpu *vcpu) 548 { 549 int ret; 550 551 if (vcpu->arch.sie_block->ipa == 0xb210) 552 return handle_pv_spx(vcpu); 553 if (vcpu->arch.sie_block->ipa == 0xb220) 554 return handle_pv_sclp(vcpu); 555 if (vcpu->arch.sie_block->ipa == 0xb9a4) 556 return handle_pv_uvc(vcpu); 557 if (vcpu->arch.sie_block->ipa >> 8 == 0xae) { 558 /* 559 * Besides external call, other SIGP orders also cause a 560 * 108 (pv notify) intercept. In contrast to external call, 561 * these orders need to be emulated and hence the appropriate 562 * place to handle them is in handle_instruction(). 563 * So first try kvm_s390_handle_sigp_pei() and if that isn't 564 * successful, go on with handle_instruction(). 565 */ 566 ret = kvm_s390_handle_sigp_pei(vcpu); 567 if (!ret) 568 return ret; 569 } 570 571 return handle_instruction(vcpu); 572 } 573 574 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) 575 { 576 int rc, per_rc = 0; 577 578 if (kvm_is_ucontrol(vcpu->kvm)) 579 return -EOPNOTSUPP; 580 581 switch (vcpu->arch.sie_block->icptcode) { 582 case ICPT_EXTREQ: 583 vcpu->stat.exit_external_request++; 584 return 0; 585 case ICPT_IOREQ: 586 vcpu->stat.exit_io_request++; 587 return 0; 588 case ICPT_INST: 589 rc = handle_instruction(vcpu); 590 break; 591 case ICPT_PROGI: 592 return handle_prog(vcpu); 593 case ICPT_EXTINT: 594 return handle_external_interrupt(vcpu); 595 case ICPT_WAIT: 596 return kvm_s390_handle_wait(vcpu); 597 case ICPT_VALIDITY: 598 return handle_validity(vcpu); 599 case ICPT_STOP: 600 return handle_stop(vcpu); 601 case ICPT_OPEREXC: 602 rc = handle_operexc(vcpu); 603 break; 604 case ICPT_PARTEXEC: 605 rc = handle_partial_execution(vcpu); 606 break; 607 case ICPT_KSS: 608 rc = kvm_s390_skey_check_enable(vcpu); 609 break; 610 case ICPT_MCHKREQ: 611 case ICPT_INT_ENABLE: 612 /* 613 * PSW bit 13 or a CR (0, 6, 14) changed and we might 614 * now be able to deliver interrupts. The pre-run code 615 * will take care of this. 616 */ 617 rc = 0; 618 break; 619 case ICPT_PV_INSTR: 620 rc = handle_instruction(vcpu); 621 break; 622 case ICPT_PV_NOTIFY: 623 rc = handle_pv_notification(vcpu); 624 break; 625 case ICPT_PV_PREF: 626 rc = 0; 627 gmap_convert_to_secure(vcpu->arch.gmap, 628 kvm_s390_get_prefix(vcpu)); 629 gmap_convert_to_secure(vcpu->arch.gmap, 630 kvm_s390_get_prefix(vcpu) + PAGE_SIZE); 631 break; 632 default: 633 return -EOPNOTSUPP; 634 } 635 636 /* process PER, also if the instruction is processed in user space */ 637 if (vcpu->arch.sie_block->icptstatus & 0x02 && 638 (!rc || rc == -EOPNOTSUPP)) 639 per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu); 640 return per_rc ? per_rc : rc; 641 } 642