1 /* 2 * handling privileged instructions 3 * 4 * Copyright IBM Corp. 2008, 2013 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License (version 2 only) 8 * as published by the Free Software Foundation. 9 * 10 * Author(s): Carsten Otte <cotte@de.ibm.com> 11 * Christian Borntraeger <borntraeger@de.ibm.com> 12 */ 13 14 #include <linux/kvm.h> 15 #include <linux/gfp.h> 16 #include <linux/errno.h> 17 #include <linux/compat.h> 18 #include <linux/mm_types.h> 19 20 #include <asm/asm-offsets.h> 21 #include <asm/facility.h> 22 #include <asm/current.h> 23 #include <asm/debug.h> 24 #include <asm/ebcdic.h> 25 #include <asm/sysinfo.h> 26 #include <asm/pgtable.h> 27 #include <asm/pgalloc.h> 28 #include <asm/gmap.h> 29 #include <asm/io.h> 30 #include <asm/ptrace.h> 31 #include <asm/compat.h> 32 #include <asm/sclp.h> 33 #include "gaccess.h" 34 #include "kvm-s390.h" 35 #include "trace.h" 36 37 static int handle_ri(struct kvm_vcpu *vcpu) 38 { 39 if (test_kvm_facility(vcpu->kvm, 64)) { 40 vcpu->arch.sie_block->ecb3 |= 0x01; 41 kvm_s390_retry_instr(vcpu); 42 return 0; 43 } else 44 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); 45 } 46 47 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu) 48 { 49 if ((vcpu->arch.sie_block->ipa & 0xf) <= 4) 50 return handle_ri(vcpu); 51 else 52 return -EOPNOTSUPP; 53 } 54 55 /* Handle SCK (SET CLOCK) interception */ 56 static int handle_set_clock(struct kvm_vcpu *vcpu) 57 { 58 int rc; 59 u8 ar; 60 u64 op2, val; 61 62 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 63 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 64 65 op2 = kvm_s390_get_base_disp_s(vcpu, &ar); 66 if (op2 & 7) /* Operand must be on a doubleword boundary */ 67 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 68 rc = read_guest(vcpu, op2, ar, &val, sizeof(val)); 69 if (rc) 70 return kvm_s390_inject_prog_cond(vcpu, rc); 71 72 VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", val); 73 kvm_s390_set_tod_clock(vcpu->kvm, val); 74 75 kvm_s390_set_psw_cc(vcpu, 0); 76 return 0; 77 } 78 79 static int handle_set_prefix(struct kvm_vcpu *vcpu) 80 { 81 u64 operand2; 82 u32 address; 83 int rc; 84 u8 ar; 85 86 vcpu->stat.instruction_spx++; 87 88 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 89 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 90 91 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); 92 93 /* must be word boundary */ 94 if (operand2 & 3) 95 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 96 97 /* get the value */ 98 rc = read_guest(vcpu, operand2, ar, &address, sizeof(address)); 99 if (rc) 100 return kvm_s390_inject_prog_cond(vcpu, rc); 101 102 address &= 0x7fffe000u; 103 104 /* 105 * Make sure the new value is valid memory. We only need to check the 106 * first page, since address is 8k aligned and memory pieces are always 107 * at least 1MB aligned and have at least a size of 1MB. 108 */ 109 if (kvm_is_error_gpa(vcpu->kvm, address)) 110 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 111 112 kvm_s390_set_prefix(vcpu, address); 113 trace_kvm_s390_handle_prefix(vcpu, 1, address); 114 return 0; 115 } 116 117 static int handle_store_prefix(struct kvm_vcpu *vcpu) 118 { 119 u64 operand2; 120 u32 address; 121 int rc; 122 u8 ar; 123 124 vcpu->stat.instruction_stpx++; 125 126 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 127 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 128 129 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); 130 131 /* must be word boundary */ 132 if (operand2 & 3) 133 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 134 135 address = kvm_s390_get_prefix(vcpu); 136 137 /* get the value */ 138 rc = write_guest(vcpu, operand2, ar, &address, sizeof(address)); 139 if (rc) 140 return kvm_s390_inject_prog_cond(vcpu, rc); 141 142 VCPU_EVENT(vcpu, 3, "STPX: storing prefix 0x%x into 0x%llx", address, operand2); 143 trace_kvm_s390_handle_prefix(vcpu, 0, address); 144 return 0; 145 } 146 147 static int handle_store_cpu_address(struct kvm_vcpu *vcpu) 148 { 149 u16 vcpu_id = vcpu->vcpu_id; 150 u64 ga; 151 int rc; 152 u8 ar; 153 154 vcpu->stat.instruction_stap++; 155 156 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 157 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 158 159 ga = kvm_s390_get_base_disp_s(vcpu, &ar); 160 161 if (ga & 1) 162 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 163 164 rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id)); 165 if (rc) 166 return kvm_s390_inject_prog_cond(vcpu, rc); 167 168 VCPU_EVENT(vcpu, 3, "STAP: storing cpu address (%u) to 0x%llx", vcpu_id, ga); 169 trace_kvm_s390_handle_stap(vcpu, ga); 170 return 0; 171 } 172 173 static int __skey_check_enable(struct kvm_vcpu *vcpu) 174 { 175 int rc = 0; 176 177 trace_kvm_s390_skey_related_inst(vcpu); 178 if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE))) 179 return rc; 180 181 rc = s390_enable_skey(); 182 VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc); 183 if (!rc) 184 vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE); 185 return rc; 186 } 187 188 static int try_handle_skey(struct kvm_vcpu *vcpu) 189 { 190 int rc; 191 192 vcpu->stat.instruction_storage_key++; 193 rc = __skey_check_enable(vcpu); 194 if (rc) 195 return rc; 196 if (sclp.has_skey) { 197 /* with storage-key facility, SIE interprets it for us */ 198 kvm_s390_retry_instr(vcpu); 199 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation"); 200 return -EAGAIN; 201 } 202 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 203 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 204 return 0; 205 } 206 207 static int handle_iske(struct kvm_vcpu *vcpu) 208 { 209 unsigned long addr; 210 unsigned char key; 211 int reg1, reg2; 212 int rc; 213 214 rc = try_handle_skey(vcpu); 215 if (rc) 216 return rc != -EAGAIN ? rc : 0; 217 218 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 219 220 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; 221 addr = kvm_s390_logical_to_effective(vcpu, addr); 222 addr = kvm_s390_real_to_abs(vcpu, addr); 223 addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr)); 224 if (kvm_is_error_hva(addr)) 225 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 226 227 down_read(¤t->mm->mmap_sem); 228 rc = get_guest_storage_key(current->mm, addr, &key); 229 up_read(¤t->mm->mmap_sem); 230 if (rc) 231 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 232 vcpu->run->s.regs.gprs[reg1] &= ~0xff; 233 vcpu->run->s.regs.gprs[reg1] |= key; 234 return 0; 235 } 236 237 static int handle_rrbe(struct kvm_vcpu *vcpu) 238 { 239 unsigned long addr; 240 int reg1, reg2; 241 int rc; 242 243 rc = try_handle_skey(vcpu); 244 if (rc) 245 return rc != -EAGAIN ? rc : 0; 246 247 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 248 249 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; 250 addr = kvm_s390_logical_to_effective(vcpu, addr); 251 addr = kvm_s390_real_to_abs(vcpu, addr); 252 addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr)); 253 if (kvm_is_error_hva(addr)) 254 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 255 256 down_read(¤t->mm->mmap_sem); 257 rc = reset_guest_reference_bit(current->mm, addr); 258 up_read(¤t->mm->mmap_sem); 259 if (rc < 0) 260 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 261 262 kvm_s390_set_psw_cc(vcpu, rc); 263 return 0; 264 } 265 266 #define SSKE_NQ 0x8 267 #define SSKE_MR 0x4 268 #define SSKE_MC 0x2 269 #define SSKE_MB 0x1 270 static int handle_sske(struct kvm_vcpu *vcpu) 271 { 272 unsigned char m3 = vcpu->arch.sie_block->ipb >> 28; 273 unsigned long start, end; 274 unsigned char key, oldkey; 275 int reg1, reg2; 276 int rc; 277 278 rc = try_handle_skey(vcpu); 279 if (rc) 280 return rc != -EAGAIN ? rc : 0; 281 282 if (!test_kvm_facility(vcpu->kvm, 8)) 283 m3 &= ~SSKE_MB; 284 if (!test_kvm_facility(vcpu->kvm, 10)) 285 m3 &= ~(SSKE_MC | SSKE_MR); 286 if (!test_kvm_facility(vcpu->kvm, 14)) 287 m3 &= ~SSKE_NQ; 288 289 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 290 291 key = vcpu->run->s.regs.gprs[reg1] & 0xfe; 292 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; 293 start = kvm_s390_logical_to_effective(vcpu, start); 294 if (m3 & SSKE_MB) { 295 /* start already designates an absolute address */ 296 end = (start + (1UL << 20)) & ~((1UL << 20) - 1); 297 } else { 298 start = kvm_s390_real_to_abs(vcpu, start); 299 end = start + PAGE_SIZE; 300 } 301 302 while (start != end) { 303 unsigned long addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start)); 304 305 if (kvm_is_error_hva(addr)) 306 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 307 308 down_read(¤t->mm->mmap_sem); 309 rc = cond_set_guest_storage_key(current->mm, addr, key, &oldkey, 310 m3 & SSKE_NQ, m3 & SSKE_MR, 311 m3 & SSKE_MC); 312 up_read(¤t->mm->mmap_sem); 313 if (rc < 0) 314 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 315 start += PAGE_SIZE; 316 } 317 318 if (m3 & (SSKE_MC | SSKE_MR)) { 319 if (m3 & SSKE_MB) { 320 /* skey in reg1 is unpredictable */ 321 kvm_s390_set_psw_cc(vcpu, 3); 322 } else { 323 kvm_s390_set_psw_cc(vcpu, rc); 324 vcpu->run->s.regs.gprs[reg1] &= ~0xff00UL; 325 vcpu->run->s.regs.gprs[reg1] |= (u64) oldkey << 8; 326 } 327 } 328 if (m3 & SSKE_MB) { 329 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT) 330 vcpu->run->s.regs.gprs[reg2] &= ~PAGE_MASK; 331 else 332 vcpu->run->s.regs.gprs[reg2] &= ~0xfffff000UL; 333 end = kvm_s390_logical_to_effective(vcpu, end); 334 vcpu->run->s.regs.gprs[reg2] |= end; 335 } 336 return 0; 337 } 338 339 static int handle_ipte_interlock(struct kvm_vcpu *vcpu) 340 { 341 vcpu->stat.instruction_ipte_interlock++; 342 if (psw_bits(vcpu->arch.sie_block->gpsw).p) 343 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 344 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu)); 345 kvm_s390_retry_instr(vcpu); 346 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation"); 347 return 0; 348 } 349 350 static int handle_test_block(struct kvm_vcpu *vcpu) 351 { 352 gpa_t addr; 353 int reg2; 354 355 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 356 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 357 358 kvm_s390_get_regs_rre(vcpu, NULL, ®2); 359 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; 360 addr = kvm_s390_logical_to_effective(vcpu, addr); 361 if (kvm_s390_check_low_addr_prot_real(vcpu, addr)) 362 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 363 addr = kvm_s390_real_to_abs(vcpu, addr); 364 365 if (kvm_is_error_gpa(vcpu->kvm, addr)) 366 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 367 /* 368 * We don't expect errors on modern systems, and do not care 369 * about storage keys (yet), so let's just clear the page. 370 */ 371 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE)) 372 return -EFAULT; 373 kvm_s390_set_psw_cc(vcpu, 0); 374 vcpu->run->s.regs.gprs[0] = 0; 375 return 0; 376 } 377 378 static int handle_tpi(struct kvm_vcpu *vcpu) 379 { 380 struct kvm_s390_interrupt_info *inti; 381 unsigned long len; 382 u32 tpi_data[3]; 383 int rc; 384 u64 addr; 385 u8 ar; 386 387 addr = kvm_s390_get_base_disp_s(vcpu, &ar); 388 if (addr & 3) 389 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 390 391 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0); 392 if (!inti) { 393 kvm_s390_set_psw_cc(vcpu, 0); 394 return 0; 395 } 396 397 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr; 398 tpi_data[1] = inti->io.io_int_parm; 399 tpi_data[2] = inti->io.io_int_word; 400 if (addr) { 401 /* 402 * Store the two-word I/O interruption code into the 403 * provided area. 404 */ 405 len = sizeof(tpi_data) - 4; 406 rc = write_guest(vcpu, addr, ar, &tpi_data, len); 407 if (rc) { 408 rc = kvm_s390_inject_prog_cond(vcpu, rc); 409 goto reinject_interrupt; 410 } 411 } else { 412 /* 413 * Store the three-word I/O interruption code into 414 * the appropriate lowcore area. 415 */ 416 len = sizeof(tpi_data); 417 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) { 418 /* failed writes to the low core are not recoverable */ 419 rc = -EFAULT; 420 goto reinject_interrupt; 421 } 422 } 423 424 /* irq was successfully handed to the guest */ 425 kfree(inti); 426 kvm_s390_set_psw_cc(vcpu, 1); 427 return 0; 428 reinject_interrupt: 429 /* 430 * If we encounter a problem storing the interruption code, the 431 * instruction is suppressed from the guest's view: reinject the 432 * interrupt. 433 */ 434 if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) { 435 kfree(inti); 436 rc = -EFAULT; 437 } 438 /* don't set the cc, a pgm irq was injected or we drop to user space */ 439 return rc ? -EFAULT : 0; 440 } 441 442 static int handle_tsch(struct kvm_vcpu *vcpu) 443 { 444 struct kvm_s390_interrupt_info *inti = NULL; 445 const u64 isc_mask = 0xffUL << 24; /* all iscs set */ 446 447 /* a valid schid has at least one bit set */ 448 if (vcpu->run->s.regs.gprs[1]) 449 inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask, 450 vcpu->run->s.regs.gprs[1]); 451 452 /* 453 * Prepare exit to userspace. 454 * We indicate whether we dequeued a pending I/O interrupt 455 * so that userspace can re-inject it if the instruction gets 456 * a program check. While this may re-order the pending I/O 457 * interrupts, this is no problem since the priority is kept 458 * intact. 459 */ 460 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH; 461 vcpu->run->s390_tsch.dequeued = !!inti; 462 if (inti) { 463 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id; 464 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr; 465 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm; 466 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word; 467 } 468 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb; 469 kfree(inti); 470 return -EREMOTE; 471 } 472 473 static int handle_io_inst(struct kvm_vcpu *vcpu) 474 { 475 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction"); 476 477 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 478 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 479 480 if (vcpu->kvm->arch.css_support) { 481 /* 482 * Most I/O instructions will be handled by userspace. 483 * Exceptions are tpi and the interrupt portion of tsch. 484 */ 485 if (vcpu->arch.sie_block->ipa == 0xb236) 486 return handle_tpi(vcpu); 487 if (vcpu->arch.sie_block->ipa == 0xb235) 488 return handle_tsch(vcpu); 489 /* Handle in userspace. */ 490 return -EOPNOTSUPP; 491 } else { 492 /* 493 * Set condition code 3 to stop the guest from issuing channel 494 * I/O instructions. 495 */ 496 kvm_s390_set_psw_cc(vcpu, 3); 497 return 0; 498 } 499 } 500 501 static int handle_stfl(struct kvm_vcpu *vcpu) 502 { 503 int rc; 504 unsigned int fac; 505 506 vcpu->stat.instruction_stfl++; 507 508 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 509 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 510 511 /* 512 * We need to shift the lower 32 facility bits (bit 0-31) from a u64 513 * into a u32 memory representation. They will remain bits 0-31. 514 */ 515 fac = *vcpu->kvm->arch.model.fac_list >> 32; 516 rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list), 517 &fac, sizeof(fac)); 518 if (rc) 519 return rc; 520 VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac); 521 trace_kvm_s390_handle_stfl(vcpu, fac); 522 return 0; 523 } 524 525 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA) 526 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL 527 #define PSW_ADDR_24 0x0000000000ffffffUL 528 #define PSW_ADDR_31 0x000000007fffffffUL 529 530 int is_valid_psw(psw_t *psw) 531 { 532 if (psw->mask & PSW_MASK_UNASSIGNED) 533 return 0; 534 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) { 535 if (psw->addr & ~PSW_ADDR_31) 536 return 0; 537 } 538 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24)) 539 return 0; 540 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA) 541 return 0; 542 if (psw->addr & 1) 543 return 0; 544 return 1; 545 } 546 547 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu) 548 { 549 psw_t *gpsw = &vcpu->arch.sie_block->gpsw; 550 psw_compat_t new_psw; 551 u64 addr; 552 int rc; 553 u8 ar; 554 555 if (gpsw->mask & PSW_MASK_PSTATE) 556 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 557 558 addr = kvm_s390_get_base_disp_s(vcpu, &ar); 559 if (addr & 7) 560 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 561 562 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw)); 563 if (rc) 564 return kvm_s390_inject_prog_cond(vcpu, rc); 565 if (!(new_psw.mask & PSW32_MASK_BASE)) 566 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 567 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32; 568 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE; 569 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE; 570 if (!is_valid_psw(gpsw)) 571 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 572 return 0; 573 } 574 575 static int handle_lpswe(struct kvm_vcpu *vcpu) 576 { 577 psw_t new_psw; 578 u64 addr; 579 int rc; 580 u8 ar; 581 582 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 583 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 584 585 addr = kvm_s390_get_base_disp_s(vcpu, &ar); 586 if (addr & 7) 587 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 588 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw)); 589 if (rc) 590 return kvm_s390_inject_prog_cond(vcpu, rc); 591 vcpu->arch.sie_block->gpsw = new_psw; 592 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw)) 593 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 594 return 0; 595 } 596 597 static int handle_stidp(struct kvm_vcpu *vcpu) 598 { 599 u64 stidp_data = vcpu->kvm->arch.model.cpuid; 600 u64 operand2; 601 int rc; 602 u8 ar; 603 604 vcpu->stat.instruction_stidp++; 605 606 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 607 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 608 609 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); 610 611 if (operand2 & 7) 612 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 613 614 rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data)); 615 if (rc) 616 return kvm_s390_inject_prog_cond(vcpu, rc); 617 618 VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data); 619 return 0; 620 } 621 622 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem) 623 { 624 int cpus = 0; 625 int n; 626 627 cpus = atomic_read(&vcpu->kvm->online_vcpus); 628 629 /* deal with other level 3 hypervisors */ 630 if (stsi(mem, 3, 2, 2)) 631 mem->count = 0; 632 if (mem->count < 8) 633 mem->count++; 634 for (n = mem->count - 1; n > 0 ; n--) 635 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0])); 636 637 memset(&mem->vm[0], 0, sizeof(mem->vm[0])); 638 mem->vm[0].cpus_total = cpus; 639 mem->vm[0].cpus_configured = cpus; 640 mem->vm[0].cpus_standby = 0; 641 mem->vm[0].cpus_reserved = 0; 642 mem->vm[0].caf = 1000; 643 memcpy(mem->vm[0].name, "KVMguest", 8); 644 ASCEBC(mem->vm[0].name, 8); 645 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16); 646 ASCEBC(mem->vm[0].cpi, 16); 647 } 648 649 static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, u8 ar, 650 u8 fc, u8 sel1, u16 sel2) 651 { 652 vcpu->run->exit_reason = KVM_EXIT_S390_STSI; 653 vcpu->run->s390_stsi.addr = addr; 654 vcpu->run->s390_stsi.ar = ar; 655 vcpu->run->s390_stsi.fc = fc; 656 vcpu->run->s390_stsi.sel1 = sel1; 657 vcpu->run->s390_stsi.sel2 = sel2; 658 } 659 660 static int handle_stsi(struct kvm_vcpu *vcpu) 661 { 662 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28; 663 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff; 664 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff; 665 unsigned long mem = 0; 666 u64 operand2; 667 int rc = 0; 668 u8 ar; 669 670 vcpu->stat.instruction_stsi++; 671 VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2); 672 673 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 674 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 675 676 if (fc > 3) { 677 kvm_s390_set_psw_cc(vcpu, 3); 678 return 0; 679 } 680 681 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00 682 || vcpu->run->s.regs.gprs[1] & 0xffff0000) 683 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 684 685 if (fc == 0) { 686 vcpu->run->s.regs.gprs[0] = 3 << 28; 687 kvm_s390_set_psw_cc(vcpu, 0); 688 return 0; 689 } 690 691 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); 692 693 if (operand2 & 0xfff) 694 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 695 696 switch (fc) { 697 case 1: /* same handling for 1 and 2 */ 698 case 2: 699 mem = get_zeroed_page(GFP_KERNEL); 700 if (!mem) 701 goto out_no_data; 702 if (stsi((void *) mem, fc, sel1, sel2)) 703 goto out_no_data; 704 break; 705 case 3: 706 if (sel1 != 2 || sel2 != 2) 707 goto out_no_data; 708 mem = get_zeroed_page(GFP_KERNEL); 709 if (!mem) 710 goto out_no_data; 711 handle_stsi_3_2_2(vcpu, (void *) mem); 712 break; 713 } 714 715 rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE); 716 if (rc) { 717 rc = kvm_s390_inject_prog_cond(vcpu, rc); 718 goto out; 719 } 720 if (vcpu->kvm->arch.user_stsi) { 721 insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2); 722 rc = -EREMOTE; 723 } 724 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2); 725 free_page(mem); 726 kvm_s390_set_psw_cc(vcpu, 0); 727 vcpu->run->s.regs.gprs[0] = 0; 728 return rc; 729 out_no_data: 730 kvm_s390_set_psw_cc(vcpu, 3); 731 out: 732 free_page(mem); 733 return rc; 734 } 735 736 static const intercept_handler_t b2_handlers[256] = { 737 [0x02] = handle_stidp, 738 [0x04] = handle_set_clock, 739 [0x10] = handle_set_prefix, 740 [0x11] = handle_store_prefix, 741 [0x12] = handle_store_cpu_address, 742 [0x14] = kvm_s390_handle_vsie, 743 [0x21] = handle_ipte_interlock, 744 [0x29] = handle_iske, 745 [0x2a] = handle_rrbe, 746 [0x2b] = handle_sske, 747 [0x2c] = handle_test_block, 748 [0x30] = handle_io_inst, 749 [0x31] = handle_io_inst, 750 [0x32] = handle_io_inst, 751 [0x33] = handle_io_inst, 752 [0x34] = handle_io_inst, 753 [0x35] = handle_io_inst, 754 [0x36] = handle_io_inst, 755 [0x37] = handle_io_inst, 756 [0x38] = handle_io_inst, 757 [0x39] = handle_io_inst, 758 [0x3a] = handle_io_inst, 759 [0x3b] = handle_io_inst, 760 [0x3c] = handle_io_inst, 761 [0x50] = handle_ipte_interlock, 762 [0x5f] = handle_io_inst, 763 [0x74] = handle_io_inst, 764 [0x76] = handle_io_inst, 765 [0x7d] = handle_stsi, 766 [0xb1] = handle_stfl, 767 [0xb2] = handle_lpswe, 768 }; 769 770 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu) 771 { 772 intercept_handler_t handler; 773 774 /* 775 * A lot of B2 instructions are priviledged. Here we check for 776 * the privileged ones, that we can handle in the kernel. 777 * Anything else goes to userspace. 778 */ 779 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; 780 if (handler) 781 return handler(vcpu); 782 783 return -EOPNOTSUPP; 784 } 785 786 static int handle_epsw(struct kvm_vcpu *vcpu) 787 { 788 int reg1, reg2; 789 790 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 791 792 /* This basically extracts the mask half of the psw. */ 793 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL; 794 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32; 795 if (reg2) { 796 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL; 797 vcpu->run->s.regs.gprs[reg2] |= 798 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL; 799 } 800 return 0; 801 } 802 803 #define PFMF_RESERVED 0xfffc0101UL 804 #define PFMF_SK 0x00020000UL 805 #define PFMF_CF 0x00010000UL 806 #define PFMF_UI 0x00008000UL 807 #define PFMF_FSC 0x00007000UL 808 #define PFMF_NQ 0x00000800UL 809 #define PFMF_MR 0x00000400UL 810 #define PFMF_MC 0x00000200UL 811 #define PFMF_KEY 0x000000feUL 812 813 static int handle_pfmf(struct kvm_vcpu *vcpu) 814 { 815 bool mr = false, mc = false, nq; 816 int reg1, reg2; 817 unsigned long start, end; 818 unsigned char key; 819 820 vcpu->stat.instruction_pfmf++; 821 822 kvm_s390_get_regs_rre(vcpu, ®1, ®2); 823 824 if (!test_kvm_facility(vcpu->kvm, 8)) 825 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); 826 827 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 828 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 829 830 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED) 831 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 832 833 /* Only provide non-quiescing support if enabled for the guest */ 834 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && 835 !test_kvm_facility(vcpu->kvm, 14)) 836 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 837 838 /* Only provide conditional-SSKE support if enabled for the guest */ 839 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK && 840 test_kvm_facility(vcpu->kvm, 10)) { 841 mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR; 842 mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC; 843 } 844 845 nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ; 846 key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY; 847 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; 848 start = kvm_s390_logical_to_effective(vcpu, start); 849 850 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { 851 if (kvm_s390_check_low_addr_prot_real(vcpu, start)) 852 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 853 } 854 855 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) { 856 case 0x00000000: 857 /* only 4k frames specify a real address */ 858 start = kvm_s390_real_to_abs(vcpu, start); 859 end = (start + (1UL << 12)) & ~((1UL << 12) - 1); 860 break; 861 case 0x00001000: 862 end = (start + (1UL << 20)) & ~((1UL << 20) - 1); 863 break; 864 case 0x00002000: 865 /* only support 2G frame size if EDAT2 is available and we are 866 not in 24-bit addressing mode */ 867 if (!test_kvm_facility(vcpu->kvm, 78) || 868 psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_24BIT) 869 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 870 end = (start + (1UL << 31)) & ~((1UL << 31) - 1); 871 break; 872 default: 873 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 874 } 875 876 while (start != end) { 877 unsigned long useraddr; 878 879 /* Translate guest address to host address */ 880 useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start)); 881 if (kvm_is_error_hva(useraddr)) 882 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 883 884 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { 885 if (clear_user((void __user *)useraddr, PAGE_SIZE)) 886 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 887 } 888 889 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) { 890 int rc = __skey_check_enable(vcpu); 891 892 if (rc) 893 return rc; 894 down_read(¤t->mm->mmap_sem); 895 rc = cond_set_guest_storage_key(current->mm, useraddr, 896 key, NULL, nq, mr, mc); 897 up_read(¤t->mm->mmap_sem); 898 if (rc < 0) 899 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 900 } 901 902 start += PAGE_SIZE; 903 } 904 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) { 905 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT) { 906 vcpu->run->s.regs.gprs[reg2] = end; 907 } else { 908 vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL; 909 end = kvm_s390_logical_to_effective(vcpu, end); 910 vcpu->run->s.regs.gprs[reg2] |= end; 911 } 912 } 913 return 0; 914 } 915 916 static int handle_essa(struct kvm_vcpu *vcpu) 917 { 918 /* entries expected to be 1FF */ 919 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3; 920 unsigned long *cbrlo; 921 struct gmap *gmap; 922 int i; 923 924 VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries); 925 gmap = vcpu->arch.gmap; 926 vcpu->stat.instruction_essa++; 927 if (!vcpu->kvm->arch.use_cmma) 928 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); 929 930 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 931 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 932 933 if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6) 934 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 935 936 /* Retry the ESSA instruction */ 937 kvm_s390_retry_instr(vcpu); 938 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */ 939 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo); 940 down_read(&gmap->mm->mmap_sem); 941 for (i = 0; i < entries; ++i) 942 __gmap_zap(gmap, cbrlo[i]); 943 up_read(&gmap->mm->mmap_sem); 944 return 0; 945 } 946 947 static const intercept_handler_t b9_handlers[256] = { 948 [0x8a] = handle_ipte_interlock, 949 [0x8d] = handle_epsw, 950 [0x8e] = handle_ipte_interlock, 951 [0x8f] = handle_ipte_interlock, 952 [0xab] = handle_essa, 953 [0xaf] = handle_pfmf, 954 }; 955 956 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu) 957 { 958 intercept_handler_t handler; 959 960 /* This is handled just as for the B2 instructions. */ 961 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; 962 if (handler) 963 return handler(vcpu); 964 965 return -EOPNOTSUPP; 966 } 967 968 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu) 969 { 970 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; 971 int reg3 = vcpu->arch.sie_block->ipa & 0x000f; 972 int reg, rc, nr_regs; 973 u32 ctl_array[16]; 974 u64 ga; 975 u8 ar; 976 977 vcpu->stat.instruction_lctl++; 978 979 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 980 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 981 982 ga = kvm_s390_get_base_disp_rs(vcpu, &ar); 983 984 if (ga & 3) 985 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 986 987 VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga); 988 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga); 989 990 nr_regs = ((reg3 - reg1) & 0xf) + 1; 991 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32)); 992 if (rc) 993 return kvm_s390_inject_prog_cond(vcpu, rc); 994 reg = reg1; 995 nr_regs = 0; 996 do { 997 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul; 998 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++]; 999 if (reg == reg3) 1000 break; 1001 reg = (reg + 1) % 16; 1002 } while (1); 1003 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 1004 return 0; 1005 } 1006 1007 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu) 1008 { 1009 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; 1010 int reg3 = vcpu->arch.sie_block->ipa & 0x000f; 1011 int reg, rc, nr_regs; 1012 u32 ctl_array[16]; 1013 u64 ga; 1014 u8 ar; 1015 1016 vcpu->stat.instruction_stctl++; 1017 1018 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 1019 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 1020 1021 ga = kvm_s390_get_base_disp_rs(vcpu, &ar); 1022 1023 if (ga & 3) 1024 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 1025 1026 VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga); 1027 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga); 1028 1029 reg = reg1; 1030 nr_regs = 0; 1031 do { 1032 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg]; 1033 if (reg == reg3) 1034 break; 1035 reg = (reg + 1) % 16; 1036 } while (1); 1037 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32)); 1038 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0; 1039 } 1040 1041 static int handle_lctlg(struct kvm_vcpu *vcpu) 1042 { 1043 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; 1044 int reg3 = vcpu->arch.sie_block->ipa & 0x000f; 1045 int reg, rc, nr_regs; 1046 u64 ctl_array[16]; 1047 u64 ga; 1048 u8 ar; 1049 1050 vcpu->stat.instruction_lctlg++; 1051 1052 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 1053 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 1054 1055 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar); 1056 1057 if (ga & 7) 1058 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 1059 1060 VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga); 1061 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga); 1062 1063 nr_regs = ((reg3 - reg1) & 0xf) + 1; 1064 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64)); 1065 if (rc) 1066 return kvm_s390_inject_prog_cond(vcpu, rc); 1067 reg = reg1; 1068 nr_regs = 0; 1069 do { 1070 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++]; 1071 if (reg == reg3) 1072 break; 1073 reg = (reg + 1) % 16; 1074 } while (1); 1075 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 1076 return 0; 1077 } 1078 1079 static int handle_stctg(struct kvm_vcpu *vcpu) 1080 { 1081 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; 1082 int reg3 = vcpu->arch.sie_block->ipa & 0x000f; 1083 int reg, rc, nr_regs; 1084 u64 ctl_array[16]; 1085 u64 ga; 1086 u8 ar; 1087 1088 vcpu->stat.instruction_stctg++; 1089 1090 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 1091 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 1092 1093 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar); 1094 1095 if (ga & 7) 1096 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 1097 1098 VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga); 1099 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga); 1100 1101 reg = reg1; 1102 nr_regs = 0; 1103 do { 1104 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg]; 1105 if (reg == reg3) 1106 break; 1107 reg = (reg + 1) % 16; 1108 } while (1); 1109 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64)); 1110 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0; 1111 } 1112 1113 static const intercept_handler_t eb_handlers[256] = { 1114 [0x2f] = handle_lctlg, 1115 [0x25] = handle_stctg, 1116 [0x60] = handle_ri, 1117 [0x61] = handle_ri, 1118 [0x62] = handle_ri, 1119 }; 1120 1121 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu) 1122 { 1123 intercept_handler_t handler; 1124 1125 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff]; 1126 if (handler) 1127 return handler(vcpu); 1128 return -EOPNOTSUPP; 1129 } 1130 1131 static int handle_tprot(struct kvm_vcpu *vcpu) 1132 { 1133 u64 address1, address2; 1134 unsigned long hva, gpa; 1135 int ret = 0, cc = 0; 1136 bool writable; 1137 u8 ar; 1138 1139 vcpu->stat.instruction_tprot++; 1140 1141 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 1142 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 1143 1144 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL); 1145 1146 /* we only handle the Linux memory detection case: 1147 * access key == 0 1148 * everything else goes to userspace. */ 1149 if (address2 & 0xf0) 1150 return -EOPNOTSUPP; 1151 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT) 1152 ipte_lock(vcpu); 1153 ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE); 1154 if (ret == PGM_PROTECTION) { 1155 /* Write protected? Try again with read-only... */ 1156 cc = 1; 1157 ret = guest_translate_address(vcpu, address1, ar, &gpa, 1158 GACC_FETCH); 1159 } 1160 if (ret) { 1161 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) { 1162 ret = kvm_s390_inject_program_int(vcpu, ret); 1163 } else if (ret > 0) { 1164 /* Translation not available */ 1165 kvm_s390_set_psw_cc(vcpu, 3); 1166 ret = 0; 1167 } 1168 goto out_unlock; 1169 } 1170 1171 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable); 1172 if (kvm_is_error_hva(hva)) { 1173 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 1174 } else { 1175 if (!writable) 1176 cc = 1; /* Write not permitted ==> read-only */ 1177 kvm_s390_set_psw_cc(vcpu, cc); 1178 /* Note: CC2 only occurs for storage keys (not supported yet) */ 1179 } 1180 out_unlock: 1181 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT) 1182 ipte_unlock(vcpu); 1183 return ret; 1184 } 1185 1186 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu) 1187 { 1188 /* For e5xx... instructions we only handle TPROT */ 1189 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01) 1190 return handle_tprot(vcpu); 1191 return -EOPNOTSUPP; 1192 } 1193 1194 static int handle_sckpf(struct kvm_vcpu *vcpu) 1195 { 1196 u32 value; 1197 1198 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) 1199 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); 1200 1201 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000) 1202 return kvm_s390_inject_program_int(vcpu, 1203 PGM_SPECIFICATION); 1204 1205 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff; 1206 vcpu->arch.sie_block->todpr = value; 1207 1208 return 0; 1209 } 1210 1211 static int handle_ptff(struct kvm_vcpu *vcpu) 1212 { 1213 /* we don't emulate any control instructions yet */ 1214 kvm_s390_set_psw_cc(vcpu, 3); 1215 return 0; 1216 } 1217 1218 static const intercept_handler_t x01_handlers[256] = { 1219 [0x04] = handle_ptff, 1220 [0x07] = handle_sckpf, 1221 }; 1222 1223 int kvm_s390_handle_01(struct kvm_vcpu *vcpu) 1224 { 1225 intercept_handler_t handler; 1226 1227 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; 1228 if (handler) 1229 return handler(vcpu); 1230 return -EOPNOTSUPP; 1231 } 1232