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