1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * AArch64 code 4 * 5 * Copyright (C) 2018, Red Hat, Inc. 6 */ 7 8 #include <linux/compiler.h> 9 #include <assert.h> 10 11 #include "guest_modes.h" 12 #include "kvm_util.h" 13 #include "processor.h" 14 #include "ucall_common.h" 15 16 #include <linux/bitfield.h> 17 #include <linux/sizes.h> 18 19 #define DEFAULT_ARM64_GUEST_STACK_VADDR_MIN 0xac0000 20 21 static vm_vaddr_t exception_handlers; 22 23 static uint64_t page_align(struct kvm_vm *vm, uint64_t v) 24 { 25 return (v + vm->page_size) & ~(vm->page_size - 1); 26 } 27 28 static uint64_t pgd_index(struct kvm_vm *vm, vm_vaddr_t gva) 29 { 30 unsigned int shift = (vm->pgtable_levels - 1) * (vm->page_shift - 3) + vm->page_shift; 31 uint64_t mask = (1UL << (vm->va_bits - shift)) - 1; 32 33 return (gva >> shift) & mask; 34 } 35 36 static uint64_t pud_index(struct kvm_vm *vm, vm_vaddr_t gva) 37 { 38 unsigned int shift = 2 * (vm->page_shift - 3) + vm->page_shift; 39 uint64_t mask = (1UL << (vm->page_shift - 3)) - 1; 40 41 TEST_ASSERT(vm->pgtable_levels == 4, 42 "Mode %d does not have 4 page table levels", vm->mode); 43 44 return (gva >> shift) & mask; 45 } 46 47 static uint64_t pmd_index(struct kvm_vm *vm, vm_vaddr_t gva) 48 { 49 unsigned int shift = (vm->page_shift - 3) + vm->page_shift; 50 uint64_t mask = (1UL << (vm->page_shift - 3)) - 1; 51 52 TEST_ASSERT(vm->pgtable_levels >= 3, 53 "Mode %d does not have >= 3 page table levels", vm->mode); 54 55 return (gva >> shift) & mask; 56 } 57 58 static uint64_t pte_index(struct kvm_vm *vm, vm_vaddr_t gva) 59 { 60 uint64_t mask = (1UL << (vm->page_shift - 3)) - 1; 61 return (gva >> vm->page_shift) & mask; 62 } 63 64 static inline bool use_lpa2_pte_format(struct kvm_vm *vm) 65 { 66 return (vm->page_size == SZ_4K || vm->page_size == SZ_16K) && 67 (vm->pa_bits > 48 || vm->va_bits > 48); 68 } 69 70 static uint64_t addr_pte(struct kvm_vm *vm, uint64_t pa, uint64_t attrs) 71 { 72 uint64_t pte; 73 74 if (use_lpa2_pte_format(vm)) { 75 pte = pa & GENMASK(49, vm->page_shift); 76 pte |= FIELD_GET(GENMASK(51, 50), pa) << 8; 77 attrs &= ~GENMASK(9, 8); 78 } else { 79 pte = pa & GENMASK(47, vm->page_shift); 80 if (vm->page_shift == 16) 81 pte |= FIELD_GET(GENMASK(51, 48), pa) << 12; 82 } 83 pte |= attrs; 84 85 return pte; 86 } 87 88 static uint64_t pte_addr(struct kvm_vm *vm, uint64_t pte) 89 { 90 uint64_t pa; 91 92 if (use_lpa2_pte_format(vm)) { 93 pa = pte & GENMASK(49, vm->page_shift); 94 pa |= FIELD_GET(GENMASK(9, 8), pte) << 50; 95 } else { 96 pa = pte & GENMASK(47, vm->page_shift); 97 if (vm->page_shift == 16) 98 pa |= FIELD_GET(GENMASK(15, 12), pte) << 48; 99 } 100 101 return pa; 102 } 103 104 static uint64_t ptrs_per_pgd(struct kvm_vm *vm) 105 { 106 unsigned int shift = (vm->pgtable_levels - 1) * (vm->page_shift - 3) + vm->page_shift; 107 return 1 << (vm->va_bits - shift); 108 } 109 110 static uint64_t __maybe_unused ptrs_per_pte(struct kvm_vm *vm) 111 { 112 return 1 << (vm->page_shift - 3); 113 } 114 115 void virt_arch_pgd_alloc(struct kvm_vm *vm) 116 { 117 size_t nr_pages = page_align(vm, ptrs_per_pgd(vm) * 8) / vm->page_size; 118 119 if (vm->pgd_created) 120 return; 121 122 vm->pgd = vm_phy_pages_alloc(vm, nr_pages, 123 KVM_GUEST_PAGE_TABLE_MIN_PADDR, 124 vm->memslots[MEM_REGION_PT]); 125 vm->pgd_created = true; 126 } 127 128 static void _virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, 129 uint64_t flags) 130 { 131 uint8_t attr_idx = flags & 7; 132 uint64_t *ptep; 133 134 TEST_ASSERT((vaddr % vm->page_size) == 0, 135 "Virtual address not on page boundary,\n" 136 " vaddr: 0x%lx vm->page_size: 0x%x", vaddr, vm->page_size); 137 TEST_ASSERT(sparsebit_is_set(vm->vpages_valid, 138 (vaddr >> vm->page_shift)), 139 "Invalid virtual address, vaddr: 0x%lx", vaddr); 140 TEST_ASSERT((paddr % vm->page_size) == 0, 141 "Physical address not on page boundary,\n" 142 " paddr: 0x%lx vm->page_size: 0x%x", paddr, vm->page_size); 143 TEST_ASSERT((paddr >> vm->page_shift) <= vm->max_gfn, 144 "Physical address beyond beyond maximum supported,\n" 145 " paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", 146 paddr, vm->max_gfn, vm->page_size); 147 148 ptep = addr_gpa2hva(vm, vm->pgd) + pgd_index(vm, vaddr) * 8; 149 if (!*ptep) 150 *ptep = addr_pte(vm, vm_alloc_page_table(vm), 3); 151 152 switch (vm->pgtable_levels) { 153 case 4: 154 ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pud_index(vm, vaddr) * 8; 155 if (!*ptep) 156 *ptep = addr_pte(vm, vm_alloc_page_table(vm), 3); 157 /* fall through */ 158 case 3: 159 ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pmd_index(vm, vaddr) * 8; 160 if (!*ptep) 161 *ptep = addr_pte(vm, vm_alloc_page_table(vm), 3); 162 /* fall through */ 163 case 2: 164 ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pte_index(vm, vaddr) * 8; 165 break; 166 default: 167 TEST_FAIL("Page table levels must be 2, 3, or 4"); 168 } 169 170 *ptep = addr_pte(vm, paddr, (attr_idx << 2) | (1 << 10) | 3); /* AF */ 171 } 172 173 void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) 174 { 175 uint64_t attr_idx = MT_NORMAL; 176 177 _virt_pg_map(vm, vaddr, paddr, attr_idx); 178 } 179 180 uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva) 181 { 182 uint64_t *ptep; 183 184 if (!vm->pgd_created) 185 goto unmapped_gva; 186 187 ptep = addr_gpa2hva(vm, vm->pgd) + pgd_index(vm, gva) * 8; 188 if (!ptep) 189 goto unmapped_gva; 190 191 switch (vm->pgtable_levels) { 192 case 4: 193 ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pud_index(vm, gva) * 8; 194 if (!ptep) 195 goto unmapped_gva; 196 /* fall through */ 197 case 3: 198 ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pmd_index(vm, gva) * 8; 199 if (!ptep) 200 goto unmapped_gva; 201 /* fall through */ 202 case 2: 203 ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pte_index(vm, gva) * 8; 204 if (!ptep) 205 goto unmapped_gva; 206 break; 207 default: 208 TEST_FAIL("Page table levels must be 2, 3, or 4"); 209 } 210 211 return ptep; 212 213 unmapped_gva: 214 TEST_FAIL("No mapping for vm virtual address, gva: 0x%lx", gva); 215 exit(EXIT_FAILURE); 216 } 217 218 vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) 219 { 220 uint64_t *ptep = virt_get_pte_hva(vm, gva); 221 222 return pte_addr(vm, *ptep) + (gva & (vm->page_size - 1)); 223 } 224 225 static void pte_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent, uint64_t page, int level) 226 { 227 #ifdef DEBUG 228 static const char * const type[] = { "", "pud", "pmd", "pte" }; 229 uint64_t pte, *ptep; 230 231 if (level == 4) 232 return; 233 234 for (pte = page; pte < page + ptrs_per_pte(vm) * 8; pte += 8) { 235 ptep = addr_gpa2hva(vm, pte); 236 if (!*ptep) 237 continue; 238 fprintf(stream, "%*s%s: %lx: %lx at %p\n", indent, "", type[level], pte, *ptep, ptep); 239 pte_dump(stream, vm, indent + 1, pte_addr(vm, *ptep), level + 1); 240 } 241 #endif 242 } 243 244 void virt_arch_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) 245 { 246 int level = 4 - (vm->pgtable_levels - 1); 247 uint64_t pgd, *ptep; 248 249 if (!vm->pgd_created) 250 return; 251 252 for (pgd = vm->pgd; pgd < vm->pgd + ptrs_per_pgd(vm) * 8; pgd += 8) { 253 ptep = addr_gpa2hva(vm, pgd); 254 if (!*ptep) 255 continue; 256 fprintf(stream, "%*spgd: %lx: %lx at %p\n", indent, "", pgd, *ptep, ptep); 257 pte_dump(stream, vm, indent + 1, pte_addr(vm, *ptep), level); 258 } 259 } 260 261 void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init) 262 { 263 struct kvm_vcpu_init default_init = { .target = -1, }; 264 struct kvm_vm *vm = vcpu->vm; 265 uint64_t sctlr_el1, tcr_el1, ttbr0_el1; 266 267 if (!init) 268 init = &default_init; 269 270 if (init->target == -1) { 271 struct kvm_vcpu_init preferred; 272 vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &preferred); 273 init->target = preferred.target; 274 } 275 276 vcpu_ioctl(vcpu, KVM_ARM_VCPU_INIT, init); 277 278 /* 279 * Enable FP/ASIMD to avoid trapping when accessing Q0-Q15 280 * registers, which the variable argument list macros do. 281 */ 282 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_CPACR_EL1), 3 << 20); 283 284 vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_SCTLR_EL1), &sctlr_el1); 285 vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TCR_EL1), &tcr_el1); 286 287 /* Configure base granule size */ 288 switch (vm->mode) { 289 case VM_MODE_PXXV48_4K: 290 TEST_FAIL("AArch64 does not support 4K sized pages " 291 "with ANY-bit physical address ranges"); 292 case VM_MODE_P52V48_64K: 293 case VM_MODE_P48V48_64K: 294 case VM_MODE_P40V48_64K: 295 case VM_MODE_P36V48_64K: 296 tcr_el1 |= 1ul << 14; /* TG0 = 64KB */ 297 break; 298 case VM_MODE_P52V48_16K: 299 case VM_MODE_P48V48_16K: 300 case VM_MODE_P40V48_16K: 301 case VM_MODE_P36V48_16K: 302 case VM_MODE_P36V47_16K: 303 tcr_el1 |= 2ul << 14; /* TG0 = 16KB */ 304 break; 305 case VM_MODE_P52V48_4K: 306 case VM_MODE_P48V48_4K: 307 case VM_MODE_P40V48_4K: 308 case VM_MODE_P36V48_4K: 309 tcr_el1 |= 0ul << 14; /* TG0 = 4KB */ 310 break; 311 default: 312 TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode); 313 } 314 315 ttbr0_el1 = vm->pgd & GENMASK(47, vm->page_shift); 316 317 /* Configure output size */ 318 switch (vm->mode) { 319 case VM_MODE_P52V48_4K: 320 case VM_MODE_P52V48_16K: 321 case VM_MODE_P52V48_64K: 322 tcr_el1 |= 6ul << 32; /* IPS = 52 bits */ 323 ttbr0_el1 |= FIELD_GET(GENMASK(51, 48), vm->pgd) << 2; 324 break; 325 case VM_MODE_P48V48_4K: 326 case VM_MODE_P48V48_16K: 327 case VM_MODE_P48V48_64K: 328 tcr_el1 |= 5ul << 32; /* IPS = 48 bits */ 329 break; 330 case VM_MODE_P40V48_4K: 331 case VM_MODE_P40V48_16K: 332 case VM_MODE_P40V48_64K: 333 tcr_el1 |= 2ul << 32; /* IPS = 40 bits */ 334 break; 335 case VM_MODE_P36V48_4K: 336 case VM_MODE_P36V48_16K: 337 case VM_MODE_P36V48_64K: 338 case VM_MODE_P36V47_16K: 339 tcr_el1 |= 1ul << 32; /* IPS = 36 bits */ 340 break; 341 default: 342 TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode); 343 } 344 345 sctlr_el1 |= (1 << 0) | (1 << 2) | (1 << 12) /* M | C | I */; 346 /* TCR_EL1 |= IRGN0:WBWA | ORGN0:WBWA | SH0:Inner-Shareable */; 347 tcr_el1 |= (1 << 8) | (1 << 10) | (3 << 12); 348 tcr_el1 |= (64 - vm->va_bits) /* T0SZ */; 349 if (use_lpa2_pte_format(vm)) 350 tcr_el1 |= (1ul << 59) /* DS */; 351 352 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_SCTLR_EL1), sctlr_el1); 353 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TCR_EL1), tcr_el1); 354 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_MAIR_EL1), DEFAULT_MAIR_EL1); 355 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TTBR0_EL1), ttbr0_el1); 356 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TPIDR_EL1), vcpu->id); 357 } 358 359 void vcpu_arch_dump(FILE *stream, struct kvm_vcpu *vcpu, uint8_t indent) 360 { 361 uint64_t pstate, pc; 362 363 vcpu_get_reg(vcpu, ARM64_CORE_REG(regs.pstate), &pstate); 364 vcpu_get_reg(vcpu, ARM64_CORE_REG(regs.pc), &pc); 365 366 fprintf(stream, "%*spstate: 0x%.16lx pc: 0x%.16lx\n", 367 indent, "", pstate, pc); 368 } 369 370 void vcpu_arch_set_entry_point(struct kvm_vcpu *vcpu, void *guest_code) 371 { 372 vcpu_set_reg(vcpu, ARM64_CORE_REG(regs.pc), (uint64_t)guest_code); 373 } 374 375 static struct kvm_vcpu *__aarch64_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id, 376 struct kvm_vcpu_init *init) 377 { 378 size_t stack_size; 379 uint64_t stack_vaddr; 380 struct kvm_vcpu *vcpu = __vm_vcpu_add(vm, vcpu_id); 381 382 stack_size = vm->page_size == 4096 ? DEFAULT_STACK_PGS * vm->page_size : 383 vm->page_size; 384 stack_vaddr = __vm_vaddr_alloc(vm, stack_size, 385 DEFAULT_ARM64_GUEST_STACK_VADDR_MIN, 386 MEM_REGION_DATA); 387 388 aarch64_vcpu_setup(vcpu, init); 389 390 vcpu_set_reg(vcpu, ARM64_CORE_REG(sp_el1), stack_vaddr + stack_size); 391 return vcpu; 392 } 393 394 struct kvm_vcpu *aarch64_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id, 395 struct kvm_vcpu_init *init, void *guest_code) 396 { 397 struct kvm_vcpu *vcpu = __aarch64_vcpu_add(vm, vcpu_id, init); 398 399 vcpu_arch_set_entry_point(vcpu, guest_code); 400 401 return vcpu; 402 } 403 404 struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id) 405 { 406 return __aarch64_vcpu_add(vm, vcpu_id, NULL); 407 } 408 409 void vcpu_args_set(struct kvm_vcpu *vcpu, unsigned int num, ...) 410 { 411 va_list ap; 412 int i; 413 414 TEST_ASSERT(num >= 1 && num <= 8, "Unsupported number of args,\n" 415 " num: %u", num); 416 417 va_start(ap, num); 418 419 for (i = 0; i < num; i++) { 420 vcpu_set_reg(vcpu, ARM64_CORE_REG(regs.regs[i]), 421 va_arg(ap, uint64_t)); 422 } 423 424 va_end(ap); 425 } 426 427 void kvm_exit_unexpected_exception(int vector, uint64_t ec, bool valid_ec) 428 { 429 ucall(UCALL_UNHANDLED, 3, vector, ec, valid_ec); 430 while (1) 431 ; 432 } 433 434 void assert_on_unhandled_exception(struct kvm_vcpu *vcpu) 435 { 436 struct ucall uc; 437 438 if (get_ucall(vcpu, &uc) != UCALL_UNHANDLED) 439 return; 440 441 if (uc.args[2]) /* valid_ec */ { 442 assert(VECTOR_IS_SYNC(uc.args[0])); 443 TEST_FAIL("Unexpected exception (vector:0x%lx, ec:0x%lx)", 444 uc.args[0], uc.args[1]); 445 } else { 446 assert(!VECTOR_IS_SYNC(uc.args[0])); 447 TEST_FAIL("Unexpected exception (vector:0x%lx)", 448 uc.args[0]); 449 } 450 } 451 452 struct handlers { 453 handler_fn exception_handlers[VECTOR_NUM][ESR_ELx_EC_MAX + 1]; 454 }; 455 456 void vcpu_init_descriptor_tables(struct kvm_vcpu *vcpu) 457 { 458 extern char vectors; 459 460 vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_VBAR_EL1), (uint64_t)&vectors); 461 } 462 463 void route_exception(struct ex_regs *regs, int vector) 464 { 465 struct handlers *handlers = (struct handlers *)exception_handlers; 466 bool valid_ec; 467 int ec = 0; 468 469 switch (vector) { 470 case VECTOR_SYNC_CURRENT: 471 case VECTOR_SYNC_LOWER_64: 472 ec = ESR_ELx_EC(read_sysreg(esr_el1)); 473 valid_ec = true; 474 break; 475 case VECTOR_IRQ_CURRENT: 476 case VECTOR_IRQ_LOWER_64: 477 case VECTOR_FIQ_CURRENT: 478 case VECTOR_FIQ_LOWER_64: 479 case VECTOR_ERROR_CURRENT: 480 case VECTOR_ERROR_LOWER_64: 481 ec = 0; 482 valid_ec = false; 483 break; 484 default: 485 valid_ec = false; 486 goto unexpected_exception; 487 } 488 489 if (handlers && handlers->exception_handlers[vector][ec]) 490 return handlers->exception_handlers[vector][ec](regs); 491 492 unexpected_exception: 493 kvm_exit_unexpected_exception(vector, ec, valid_ec); 494 } 495 496 void vm_init_descriptor_tables(struct kvm_vm *vm) 497 { 498 vm->handlers = __vm_vaddr_alloc(vm, sizeof(struct handlers), 499 vm->page_size, MEM_REGION_DATA); 500 501 *(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers; 502 } 503 504 void vm_install_sync_handler(struct kvm_vm *vm, int vector, int ec, 505 void (*handler)(struct ex_regs *)) 506 { 507 struct handlers *handlers = addr_gva2hva(vm, vm->handlers); 508 509 assert(VECTOR_IS_SYNC(vector)); 510 assert(vector < VECTOR_NUM); 511 assert(ec <= ESR_ELx_EC_MAX); 512 handlers->exception_handlers[vector][ec] = handler; 513 } 514 515 void vm_install_exception_handler(struct kvm_vm *vm, int vector, 516 void (*handler)(struct ex_regs *)) 517 { 518 struct handlers *handlers = addr_gva2hva(vm, vm->handlers); 519 520 assert(!VECTOR_IS_SYNC(vector)); 521 assert(vector < VECTOR_NUM); 522 handlers->exception_handlers[vector][0] = handler; 523 } 524 525 uint32_t guest_get_vcpuid(void) 526 { 527 return read_sysreg(tpidr_el1); 528 } 529 530 static uint32_t max_ipa_for_page_size(uint32_t vm_ipa, uint32_t gran, 531 uint32_t not_sup_val, uint32_t ipa52_min_val) 532 { 533 if (gran == not_sup_val) 534 return 0; 535 else if (gran >= ipa52_min_val && vm_ipa >= 52) 536 return 52; 537 else 538 return min(vm_ipa, 48U); 539 } 540 541 void aarch64_get_supported_page_sizes(uint32_t ipa, uint32_t *ipa4k, 542 uint32_t *ipa16k, uint32_t *ipa64k) 543 { 544 struct kvm_vcpu_init preferred_init; 545 int kvm_fd, vm_fd, vcpu_fd, err; 546 uint64_t val; 547 uint32_t gran; 548 struct kvm_one_reg reg = { 549 .id = KVM_ARM64_SYS_REG(SYS_ID_AA64MMFR0_EL1), 550 .addr = (uint64_t)&val, 551 }; 552 553 kvm_fd = open_kvm_dev_path_or_exit(); 554 vm_fd = __kvm_ioctl(kvm_fd, KVM_CREATE_VM, (void *)(unsigned long)ipa); 555 TEST_ASSERT(vm_fd >= 0, KVM_IOCTL_ERROR(KVM_CREATE_VM, vm_fd)); 556 557 vcpu_fd = ioctl(vm_fd, KVM_CREATE_VCPU, 0); 558 TEST_ASSERT(vcpu_fd >= 0, KVM_IOCTL_ERROR(KVM_CREATE_VCPU, vcpu_fd)); 559 560 err = ioctl(vm_fd, KVM_ARM_PREFERRED_TARGET, &preferred_init); 561 TEST_ASSERT(err == 0, KVM_IOCTL_ERROR(KVM_ARM_PREFERRED_TARGET, err)); 562 err = ioctl(vcpu_fd, KVM_ARM_VCPU_INIT, &preferred_init); 563 TEST_ASSERT(err == 0, KVM_IOCTL_ERROR(KVM_ARM_VCPU_INIT, err)); 564 565 err = ioctl(vcpu_fd, KVM_GET_ONE_REG, ®); 566 TEST_ASSERT(err == 0, KVM_IOCTL_ERROR(KVM_GET_ONE_REG, vcpu_fd)); 567 568 gran = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN4), val); 569 *ipa4k = max_ipa_for_page_size(ipa, gran, ID_AA64MMFR0_EL1_TGRAN4_NI, 570 ID_AA64MMFR0_EL1_TGRAN4_52_BIT); 571 572 gran = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN64), val); 573 *ipa64k = max_ipa_for_page_size(ipa, gran, ID_AA64MMFR0_EL1_TGRAN64_NI, 574 ID_AA64MMFR0_EL1_TGRAN64_IMP); 575 576 gran = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN16), val); 577 *ipa16k = max_ipa_for_page_size(ipa, gran, ID_AA64MMFR0_EL1_TGRAN16_NI, 578 ID_AA64MMFR0_EL1_TGRAN16_52_BIT); 579 580 close(vcpu_fd); 581 close(vm_fd); 582 close(kvm_fd); 583 } 584 585 #define __smccc_call(insn, function_id, arg0, arg1, arg2, arg3, arg4, arg5, \ 586 arg6, res) \ 587 asm volatile("mov w0, %w[function_id]\n" \ 588 "mov x1, %[arg0]\n" \ 589 "mov x2, %[arg1]\n" \ 590 "mov x3, %[arg2]\n" \ 591 "mov x4, %[arg3]\n" \ 592 "mov x5, %[arg4]\n" \ 593 "mov x6, %[arg5]\n" \ 594 "mov x7, %[arg6]\n" \ 595 #insn "#0\n" \ 596 "mov %[res0], x0\n" \ 597 "mov %[res1], x1\n" \ 598 "mov %[res2], x2\n" \ 599 "mov %[res3], x3\n" \ 600 : [res0] "=r"(res->a0), [res1] "=r"(res->a1), \ 601 [res2] "=r"(res->a2), [res3] "=r"(res->a3) \ 602 : [function_id] "r"(function_id), [arg0] "r"(arg0), \ 603 [arg1] "r"(arg1), [arg2] "r"(arg2), [arg3] "r"(arg3), \ 604 [arg4] "r"(arg4), [arg5] "r"(arg5), [arg6] "r"(arg6) \ 605 : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7") 606 607 608 void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1, 609 uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, 610 uint64_t arg6, struct arm_smccc_res *res) 611 { 612 __smccc_call(hvc, function_id, arg0, arg1, arg2, arg3, arg4, arg5, 613 arg6, res); 614 } 615 616 void smccc_smc(uint32_t function_id, uint64_t arg0, uint64_t arg1, 617 uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, 618 uint64_t arg6, struct arm_smccc_res *res) 619 { 620 __smccc_call(smc, function_id, arg0, arg1, arg2, arg3, arg4, arg5, 621 arg6, res); 622 } 623 624 void kvm_selftest_arch_init(void) 625 { 626 /* 627 * arm64 doesn't have a true default mode, so start by computing the 628 * available IPA space and page sizes early. 629 */ 630 guest_modes_append_default(); 631 } 632 633 void vm_vaddr_populate_bitmap(struct kvm_vm *vm) 634 { 635 /* 636 * arm64 selftests use only TTBR0_EL1, meaning that the valid VA space 637 * is [0, 2^(64 - TCR_EL1.T0SZ)). 638 */ 639 sparsebit_set_num(vm->vpages_valid, 0, 640 (1ULL << vm->va_bits) >> vm->page_shift); 641 } 642 643 /* Helper to call wfi instruction. */ 644 void wfi(void) 645 { 646 asm volatile("wfi"); 647 } 648