1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * intel-pasid.c - PASID idr, table and entry manipulation 4 * 5 * Copyright (C) 2018 Intel Corporation 6 * 7 * Author: Lu Baolu <baolu.lu@linux.intel.com> 8 */ 9 10 #define pr_fmt(fmt) "DMAR: " fmt 11 12 #include <linux/bitops.h> 13 #include <linux/cpufeature.h> 14 #include <linux/dmar.h> 15 #include <linux/iommu.h> 16 #include <linux/memory.h> 17 #include <linux/pci.h> 18 #include <linux/pci-ats.h> 19 #include <linux/spinlock.h> 20 21 #include "iommu.h" 22 #include "pasid.h" 23 24 /* 25 * Intel IOMMU system wide PASID name space: 26 */ 27 u32 intel_pasid_max_id = PASID_MAX; 28 29 int vcmd_alloc_pasid(struct intel_iommu *iommu, u32 *pasid) 30 { 31 unsigned long flags; 32 u8 status_code; 33 int ret = 0; 34 u64 res; 35 36 raw_spin_lock_irqsave(&iommu->register_lock, flags); 37 dmar_writeq(iommu->reg + DMAR_VCMD_REG, VCMD_CMD_ALLOC); 38 IOMMU_WAIT_OP(iommu, DMAR_VCRSP_REG, dmar_readq, 39 !(res & VCMD_VRSP_IP), res); 40 raw_spin_unlock_irqrestore(&iommu->register_lock, flags); 41 42 status_code = VCMD_VRSP_SC(res); 43 switch (status_code) { 44 case VCMD_VRSP_SC_SUCCESS: 45 *pasid = VCMD_VRSP_RESULT_PASID(res); 46 break; 47 case VCMD_VRSP_SC_NO_PASID_AVAIL: 48 pr_info("IOMMU: %s: No PASID available\n", iommu->name); 49 ret = -ENOSPC; 50 break; 51 default: 52 ret = -ENODEV; 53 pr_warn("IOMMU: %s: Unexpected error code %d\n", 54 iommu->name, status_code); 55 } 56 57 return ret; 58 } 59 60 void vcmd_free_pasid(struct intel_iommu *iommu, u32 pasid) 61 { 62 unsigned long flags; 63 u8 status_code; 64 u64 res; 65 66 raw_spin_lock_irqsave(&iommu->register_lock, flags); 67 dmar_writeq(iommu->reg + DMAR_VCMD_REG, 68 VCMD_CMD_OPERAND(pasid) | VCMD_CMD_FREE); 69 IOMMU_WAIT_OP(iommu, DMAR_VCRSP_REG, dmar_readq, 70 !(res & VCMD_VRSP_IP), res); 71 raw_spin_unlock_irqrestore(&iommu->register_lock, flags); 72 73 status_code = VCMD_VRSP_SC(res); 74 switch (status_code) { 75 case VCMD_VRSP_SC_SUCCESS: 76 break; 77 case VCMD_VRSP_SC_INVALID_PASID: 78 pr_info("IOMMU: %s: Invalid PASID\n", iommu->name); 79 break; 80 default: 81 pr_warn("IOMMU: %s: Unexpected error code %d\n", 82 iommu->name, status_code); 83 } 84 } 85 86 /* 87 * Per device pasid table management: 88 */ 89 90 /* 91 * Allocate a pasid table for @dev. It should be called in a 92 * single-thread context. 93 */ 94 int intel_pasid_alloc_table(struct device *dev) 95 { 96 struct device_domain_info *info; 97 struct pasid_table *pasid_table; 98 struct page *pages; 99 u32 max_pasid = 0; 100 int order, size; 101 102 might_sleep(); 103 info = dev_iommu_priv_get(dev); 104 if (WARN_ON(!info || !dev_is_pci(dev))) 105 return -ENODEV; 106 if (WARN_ON(info->pasid_table)) 107 return -EEXIST; 108 109 pasid_table = kzalloc(sizeof(*pasid_table), GFP_KERNEL); 110 if (!pasid_table) 111 return -ENOMEM; 112 113 if (info->pasid_supported) 114 max_pasid = min_t(u32, pci_max_pasids(to_pci_dev(dev)), 115 intel_pasid_max_id); 116 117 size = max_pasid >> (PASID_PDE_SHIFT - 3); 118 order = size ? get_order(size) : 0; 119 pages = alloc_pages_node(info->iommu->node, 120 GFP_KERNEL | __GFP_ZERO, order); 121 if (!pages) { 122 kfree(pasid_table); 123 return -ENOMEM; 124 } 125 126 pasid_table->table = page_address(pages); 127 pasid_table->order = order; 128 pasid_table->max_pasid = 1 << (order + PAGE_SHIFT + 3); 129 info->pasid_table = pasid_table; 130 131 if (!ecap_coherent(info->iommu->ecap)) 132 clflush_cache_range(pasid_table->table, (1 << order) * PAGE_SIZE); 133 134 return 0; 135 } 136 137 void intel_pasid_free_table(struct device *dev) 138 { 139 struct device_domain_info *info; 140 struct pasid_table *pasid_table; 141 struct pasid_dir_entry *dir; 142 struct pasid_entry *table; 143 int i, max_pde; 144 145 info = dev_iommu_priv_get(dev); 146 if (!info || !dev_is_pci(dev) || !info->pasid_table) 147 return; 148 149 pasid_table = info->pasid_table; 150 info->pasid_table = NULL; 151 152 /* Free scalable mode PASID directory tables: */ 153 dir = pasid_table->table; 154 max_pde = pasid_table->max_pasid >> PASID_PDE_SHIFT; 155 for (i = 0; i < max_pde; i++) { 156 table = get_pasid_table_from_pde(&dir[i]); 157 free_pgtable_page(table); 158 } 159 160 free_pages((unsigned long)pasid_table->table, pasid_table->order); 161 kfree(pasid_table); 162 } 163 164 struct pasid_table *intel_pasid_get_table(struct device *dev) 165 { 166 struct device_domain_info *info; 167 168 info = dev_iommu_priv_get(dev); 169 if (!info) 170 return NULL; 171 172 return info->pasid_table; 173 } 174 175 static int intel_pasid_get_dev_max_id(struct device *dev) 176 { 177 struct device_domain_info *info; 178 179 info = dev_iommu_priv_get(dev); 180 if (!info || !info->pasid_table) 181 return 0; 182 183 return info->pasid_table->max_pasid; 184 } 185 186 static struct pasid_entry *intel_pasid_get_entry(struct device *dev, u32 pasid) 187 { 188 struct device_domain_info *info; 189 struct pasid_table *pasid_table; 190 struct pasid_dir_entry *dir; 191 struct pasid_entry *entries; 192 int dir_index, index; 193 194 pasid_table = intel_pasid_get_table(dev); 195 if (WARN_ON(!pasid_table || pasid >= intel_pasid_get_dev_max_id(dev))) 196 return NULL; 197 198 dir = pasid_table->table; 199 info = dev_iommu_priv_get(dev); 200 dir_index = pasid >> PASID_PDE_SHIFT; 201 index = pasid & PASID_PTE_MASK; 202 203 retry: 204 entries = get_pasid_table_from_pde(&dir[dir_index]); 205 if (!entries) { 206 entries = alloc_pgtable_page(info->iommu->node, GFP_ATOMIC); 207 if (!entries) 208 return NULL; 209 210 /* 211 * The pasid directory table entry won't be freed after 212 * allocation. No worry about the race with free and 213 * clear. However, this entry might be populated by others 214 * while we are preparing it. Use theirs with a retry. 215 */ 216 if (cmpxchg64(&dir[dir_index].val, 0ULL, 217 (u64)virt_to_phys(entries) | PASID_PTE_PRESENT)) { 218 free_pgtable_page(entries); 219 goto retry; 220 } 221 if (!ecap_coherent(info->iommu->ecap)) { 222 clflush_cache_range(entries, VTD_PAGE_SIZE); 223 clflush_cache_range(&dir[dir_index].val, sizeof(*dir)); 224 } 225 } 226 227 return &entries[index]; 228 } 229 230 /* 231 * Interfaces for PASID table entry manipulation: 232 */ 233 static inline void pasid_clear_entry(struct pasid_entry *pe) 234 { 235 WRITE_ONCE(pe->val[0], 0); 236 WRITE_ONCE(pe->val[1], 0); 237 WRITE_ONCE(pe->val[2], 0); 238 WRITE_ONCE(pe->val[3], 0); 239 WRITE_ONCE(pe->val[4], 0); 240 WRITE_ONCE(pe->val[5], 0); 241 WRITE_ONCE(pe->val[6], 0); 242 WRITE_ONCE(pe->val[7], 0); 243 } 244 245 static inline void pasid_clear_entry_with_fpd(struct pasid_entry *pe) 246 { 247 WRITE_ONCE(pe->val[0], PASID_PTE_FPD); 248 WRITE_ONCE(pe->val[1], 0); 249 WRITE_ONCE(pe->val[2], 0); 250 WRITE_ONCE(pe->val[3], 0); 251 WRITE_ONCE(pe->val[4], 0); 252 WRITE_ONCE(pe->val[5], 0); 253 WRITE_ONCE(pe->val[6], 0); 254 WRITE_ONCE(pe->val[7], 0); 255 } 256 257 static void 258 intel_pasid_clear_entry(struct device *dev, u32 pasid, bool fault_ignore) 259 { 260 struct pasid_entry *pe; 261 262 pe = intel_pasid_get_entry(dev, pasid); 263 if (WARN_ON(!pe)) 264 return; 265 266 if (fault_ignore && pasid_pte_is_present(pe)) 267 pasid_clear_entry_with_fpd(pe); 268 else 269 pasid_clear_entry(pe); 270 } 271 272 static inline void pasid_set_bits(u64 *ptr, u64 mask, u64 bits) 273 { 274 u64 old; 275 276 old = READ_ONCE(*ptr); 277 WRITE_ONCE(*ptr, (old & ~mask) | bits); 278 } 279 280 /* 281 * Setup the DID(Domain Identifier) field (Bit 64~79) of scalable mode 282 * PASID entry. 283 */ 284 static inline void 285 pasid_set_domain_id(struct pasid_entry *pe, u64 value) 286 { 287 pasid_set_bits(&pe->val[1], GENMASK_ULL(15, 0), value); 288 } 289 290 /* 291 * Get domain ID value of a scalable mode PASID entry. 292 */ 293 static inline u16 294 pasid_get_domain_id(struct pasid_entry *pe) 295 { 296 return (u16)(READ_ONCE(pe->val[1]) & GENMASK_ULL(15, 0)); 297 } 298 299 /* 300 * Setup the SLPTPTR(Second Level Page Table Pointer) field (Bit 12~63) 301 * of a scalable mode PASID entry. 302 */ 303 static inline void 304 pasid_set_slptr(struct pasid_entry *pe, u64 value) 305 { 306 pasid_set_bits(&pe->val[0], VTD_PAGE_MASK, value); 307 } 308 309 /* 310 * Setup the AW(Address Width) field (Bit 2~4) of a scalable mode PASID 311 * entry. 312 */ 313 static inline void 314 pasid_set_address_width(struct pasid_entry *pe, u64 value) 315 { 316 pasid_set_bits(&pe->val[0], GENMASK_ULL(4, 2), value << 2); 317 } 318 319 /* 320 * Setup the PGTT(PASID Granular Translation Type) field (Bit 6~8) 321 * of a scalable mode PASID entry. 322 */ 323 static inline void 324 pasid_set_translation_type(struct pasid_entry *pe, u64 value) 325 { 326 pasid_set_bits(&pe->val[0], GENMASK_ULL(8, 6), value << 6); 327 } 328 329 /* 330 * Enable fault processing by clearing the FPD(Fault Processing 331 * Disable) field (Bit 1) of a scalable mode PASID entry. 332 */ 333 static inline void pasid_set_fault_enable(struct pasid_entry *pe) 334 { 335 pasid_set_bits(&pe->val[0], 1 << 1, 0); 336 } 337 338 /* 339 * Setup the WPE(Write Protect Enable) field (Bit 132) of a 340 * scalable mode PASID entry. 341 */ 342 static inline void pasid_set_wpe(struct pasid_entry *pe) 343 { 344 pasid_set_bits(&pe->val[2], 1 << 4, 1 << 4); 345 } 346 347 /* 348 * Setup the P(Present) field (Bit 0) of a scalable mode PASID 349 * entry. 350 */ 351 static inline void pasid_set_present(struct pasid_entry *pe) 352 { 353 pasid_set_bits(&pe->val[0], 1 << 0, 1); 354 } 355 356 /* 357 * Setup Page Walk Snoop bit (Bit 87) of a scalable mode PASID 358 * entry. 359 */ 360 static inline void pasid_set_page_snoop(struct pasid_entry *pe, bool value) 361 { 362 pasid_set_bits(&pe->val[1], 1 << 23, value << 23); 363 } 364 365 /* 366 * Setup No Execute Enable bit (Bit 133) of a scalable mode PASID 367 * entry. It is required when XD bit of the first level page table 368 * entry is about to be set. 369 */ 370 static inline void pasid_set_nxe(struct pasid_entry *pe) 371 { 372 pasid_set_bits(&pe->val[2], 1 << 5, 1 << 5); 373 } 374 375 /* 376 * Setup the Page Snoop (PGSNP) field (Bit 88) of a scalable mode 377 * PASID entry. 378 */ 379 static inline void 380 pasid_set_pgsnp(struct pasid_entry *pe) 381 { 382 pasid_set_bits(&pe->val[1], 1ULL << 24, 1ULL << 24); 383 } 384 385 /* 386 * Setup the First Level Page table Pointer field (Bit 140~191) 387 * of a scalable mode PASID entry. 388 */ 389 static inline void 390 pasid_set_flptr(struct pasid_entry *pe, u64 value) 391 { 392 pasid_set_bits(&pe->val[2], VTD_PAGE_MASK, value); 393 } 394 395 /* 396 * Setup the First Level Paging Mode field (Bit 130~131) of a 397 * scalable mode PASID entry. 398 */ 399 static inline void 400 pasid_set_flpm(struct pasid_entry *pe, u64 value) 401 { 402 pasid_set_bits(&pe->val[2], GENMASK_ULL(3, 2), value << 2); 403 } 404 405 static void 406 pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu, 407 u16 did, u32 pasid) 408 { 409 struct qi_desc desc; 410 411 desc.qw0 = QI_PC_DID(did) | QI_PC_GRAN(QI_PC_PASID_SEL) | 412 QI_PC_PASID(pasid) | QI_PC_TYPE; 413 desc.qw1 = 0; 414 desc.qw2 = 0; 415 desc.qw3 = 0; 416 417 qi_submit_sync(iommu, &desc, 1, 0); 418 } 419 420 static void 421 devtlb_invalidation_with_pasid(struct intel_iommu *iommu, 422 struct device *dev, u32 pasid) 423 { 424 struct device_domain_info *info; 425 u16 sid, qdep, pfsid; 426 427 info = dev_iommu_priv_get(dev); 428 if (!info || !info->ats_enabled) 429 return; 430 431 sid = info->bus << 8 | info->devfn; 432 qdep = info->ats_qdep; 433 pfsid = info->pfsid; 434 435 /* 436 * When PASID 0 is used, it indicates RID2PASID(DMA request w/o PASID), 437 * devTLB flush w/o PASID should be used. For non-zero PASID under 438 * SVA usage, device could do DMA with multiple PASIDs. It is more 439 * efficient to flush devTLB specific to the PASID. 440 */ 441 if (pasid == IOMMU_NO_PASID) 442 qi_flush_dev_iotlb(iommu, sid, pfsid, qdep, 0, 64 - VTD_PAGE_SHIFT); 443 else 444 qi_flush_dev_iotlb_pasid(iommu, sid, pfsid, pasid, qdep, 0, 64 - VTD_PAGE_SHIFT); 445 } 446 447 void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev, 448 u32 pasid, bool fault_ignore) 449 { 450 struct pasid_entry *pte; 451 u16 did, pgtt; 452 453 spin_lock(&iommu->lock); 454 pte = intel_pasid_get_entry(dev, pasid); 455 if (WARN_ON(!pte) || !pasid_pte_is_present(pte)) { 456 spin_unlock(&iommu->lock); 457 return; 458 } 459 460 did = pasid_get_domain_id(pte); 461 pgtt = pasid_pte_get_pgtt(pte); 462 intel_pasid_clear_entry(dev, pasid, fault_ignore); 463 spin_unlock(&iommu->lock); 464 465 if (!ecap_coherent(iommu->ecap)) 466 clflush_cache_range(pte, sizeof(*pte)); 467 468 pasid_cache_invalidation_with_pasid(iommu, did, pasid); 469 470 if (pgtt == PASID_ENTRY_PGTT_PT || pgtt == PASID_ENTRY_PGTT_FL_ONLY) 471 qi_flush_piotlb(iommu, did, pasid, 0, -1, 0); 472 else 473 iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH); 474 475 /* Device IOTLB doesn't need to be flushed in caching mode. */ 476 if (!cap_caching_mode(iommu->cap)) 477 devtlb_invalidation_with_pasid(iommu, dev, pasid); 478 } 479 480 /* 481 * This function flushes cache for a newly setup pasid table entry. 482 * Caller of it should not modify the in-use pasid table entries. 483 */ 484 static void pasid_flush_caches(struct intel_iommu *iommu, 485 struct pasid_entry *pte, 486 u32 pasid, u16 did) 487 { 488 if (!ecap_coherent(iommu->ecap)) 489 clflush_cache_range(pte, sizeof(*pte)); 490 491 if (cap_caching_mode(iommu->cap)) { 492 pasid_cache_invalidation_with_pasid(iommu, did, pasid); 493 qi_flush_piotlb(iommu, did, pasid, 0, -1, 0); 494 } else { 495 iommu_flush_write_buffer(iommu); 496 } 497 } 498 499 /* 500 * Set up the scalable mode pasid table entry for first only 501 * translation type. 502 */ 503 int intel_pasid_setup_first_level(struct intel_iommu *iommu, 504 struct device *dev, pgd_t *pgd, 505 u32 pasid, u16 did, int flags) 506 { 507 struct pasid_entry *pte; 508 509 if (!ecap_flts(iommu->ecap)) { 510 pr_err("No first level translation support on %s\n", 511 iommu->name); 512 return -EINVAL; 513 } 514 515 if ((flags & PASID_FLAG_FL5LP) && !cap_fl5lp_support(iommu->cap)) { 516 pr_err("No 5-level paging support for first-level on %s\n", 517 iommu->name); 518 return -EINVAL; 519 } 520 521 spin_lock(&iommu->lock); 522 pte = intel_pasid_get_entry(dev, pasid); 523 if (!pte) { 524 spin_unlock(&iommu->lock); 525 return -ENODEV; 526 } 527 528 if (pasid_pte_is_present(pte)) { 529 spin_unlock(&iommu->lock); 530 return -EBUSY; 531 } 532 533 pasid_clear_entry(pte); 534 535 /* Setup the first level page table pointer: */ 536 pasid_set_flptr(pte, (u64)__pa(pgd)); 537 538 if (flags & PASID_FLAG_FL5LP) 539 pasid_set_flpm(pte, 1); 540 541 if (flags & PASID_FLAG_PAGE_SNOOP) 542 pasid_set_pgsnp(pte); 543 544 pasid_set_domain_id(pte, did); 545 pasid_set_address_width(pte, iommu->agaw); 546 pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); 547 pasid_set_nxe(pte); 548 549 /* Setup Present and PASID Granular Transfer Type: */ 550 pasid_set_translation_type(pte, PASID_ENTRY_PGTT_FL_ONLY); 551 pasid_set_present(pte); 552 spin_unlock(&iommu->lock); 553 554 pasid_flush_caches(iommu, pte, pasid, did); 555 556 return 0; 557 } 558 559 /* 560 * Skip top levels of page tables for iommu which has less agaw 561 * than default. Unnecessary for PT mode. 562 */ 563 static inline int iommu_skip_agaw(struct dmar_domain *domain, 564 struct intel_iommu *iommu, 565 struct dma_pte **pgd) 566 { 567 int agaw; 568 569 for (agaw = domain->agaw; agaw > iommu->agaw; agaw--) { 570 *pgd = phys_to_virt(dma_pte_addr(*pgd)); 571 if (!dma_pte_present(*pgd)) 572 return -EINVAL; 573 } 574 575 return agaw; 576 } 577 578 /* 579 * Set up the scalable mode pasid entry for second only translation type. 580 */ 581 int intel_pasid_setup_second_level(struct intel_iommu *iommu, 582 struct dmar_domain *domain, 583 struct device *dev, u32 pasid) 584 { 585 struct pasid_entry *pte; 586 struct dma_pte *pgd; 587 u64 pgd_val; 588 int agaw; 589 u16 did; 590 591 /* 592 * If hardware advertises no support for second level 593 * translation, return directly. 594 */ 595 if (!ecap_slts(iommu->ecap)) { 596 pr_err("No second level translation support on %s\n", 597 iommu->name); 598 return -EINVAL; 599 } 600 601 pgd = domain->pgd; 602 agaw = iommu_skip_agaw(domain, iommu, &pgd); 603 if (agaw < 0) { 604 dev_err(dev, "Invalid domain page table\n"); 605 return -EINVAL; 606 } 607 608 pgd_val = virt_to_phys(pgd); 609 did = domain_id_iommu(domain, iommu); 610 611 spin_lock(&iommu->lock); 612 pte = intel_pasid_get_entry(dev, pasid); 613 if (!pte) { 614 spin_unlock(&iommu->lock); 615 return -ENODEV; 616 } 617 618 if (pasid_pte_is_present(pte)) { 619 spin_unlock(&iommu->lock); 620 return -EBUSY; 621 } 622 623 pasid_clear_entry(pte); 624 pasid_set_domain_id(pte, did); 625 pasid_set_slptr(pte, pgd_val); 626 pasid_set_address_width(pte, agaw); 627 pasid_set_translation_type(pte, PASID_ENTRY_PGTT_SL_ONLY); 628 pasid_set_fault_enable(pte); 629 pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); 630 631 pasid_set_present(pte); 632 spin_unlock(&iommu->lock); 633 634 pasid_flush_caches(iommu, pte, pasid, did); 635 636 return 0; 637 } 638 639 /* 640 * Set up the scalable mode pasid entry for passthrough translation type. 641 */ 642 int intel_pasid_setup_pass_through(struct intel_iommu *iommu, 643 struct dmar_domain *domain, 644 struct device *dev, u32 pasid) 645 { 646 u16 did = FLPT_DEFAULT_DID; 647 struct pasid_entry *pte; 648 649 spin_lock(&iommu->lock); 650 pte = intel_pasid_get_entry(dev, pasid); 651 if (!pte) { 652 spin_unlock(&iommu->lock); 653 return -ENODEV; 654 } 655 656 if (pasid_pte_is_present(pte)) { 657 spin_unlock(&iommu->lock); 658 return -EBUSY; 659 } 660 661 pasid_clear_entry(pte); 662 pasid_set_domain_id(pte, did); 663 pasid_set_address_width(pte, iommu->agaw); 664 pasid_set_translation_type(pte, PASID_ENTRY_PGTT_PT); 665 pasid_set_fault_enable(pte); 666 pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); 667 pasid_set_present(pte); 668 spin_unlock(&iommu->lock); 669 670 pasid_flush_caches(iommu, pte, pasid, did); 671 672 return 0; 673 } 674 675 /* 676 * Set the page snoop control for a pasid entry which has been set up. 677 */ 678 void intel_pasid_setup_page_snoop_control(struct intel_iommu *iommu, 679 struct device *dev, u32 pasid) 680 { 681 struct pasid_entry *pte; 682 u16 did; 683 684 spin_lock(&iommu->lock); 685 pte = intel_pasid_get_entry(dev, pasid); 686 if (WARN_ON(!pte || !pasid_pte_is_present(pte))) { 687 spin_unlock(&iommu->lock); 688 return; 689 } 690 691 pasid_set_pgsnp(pte); 692 did = pasid_get_domain_id(pte); 693 spin_unlock(&iommu->lock); 694 695 if (!ecap_coherent(iommu->ecap)) 696 clflush_cache_range(pte, sizeof(*pte)); 697 698 /* 699 * VT-d spec 3.4 table23 states guides for cache invalidation: 700 * 701 * - PASID-selective-within-Domain PASID-cache invalidation 702 * - PASID-selective PASID-based IOTLB invalidation 703 * - If (pasid is RID_PASID) 704 * - Global Device-TLB invalidation to affected functions 705 * Else 706 * - PASID-based Device-TLB invalidation (with S=1 and 707 * Addr[63:12]=0x7FFFFFFF_FFFFF) to affected functions 708 */ 709 pasid_cache_invalidation_with_pasid(iommu, did, pasid); 710 qi_flush_piotlb(iommu, did, pasid, 0, -1, 0); 711 712 /* Device IOTLB doesn't need to be flushed in caching mode. */ 713 if (!cap_caching_mode(iommu->cap)) 714 devtlb_invalidation_with_pasid(iommu, dev, pasid); 715 } 716