1 /* 2 * KVMGT - the implementation of Intel mediated pass-through framework for KVM 3 * 4 * Copyright(c) 2014-2016 Intel Corporation. All rights reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 * Authors: 26 * Kevin Tian <kevin.tian@intel.com> 27 * Jike Song <jike.song@intel.com> 28 * Xiaoguang Chen <xiaoguang.chen@intel.com> 29 */ 30 31 #include <linux/init.h> 32 #include <linux/device.h> 33 #include <linux/mm.h> 34 #include <linux/mmu_context.h> 35 #include <linux/sched/mm.h> 36 #include <linux/types.h> 37 #include <linux/list.h> 38 #include <linux/rbtree.h> 39 #include <linux/spinlock.h> 40 #include <linux/eventfd.h> 41 #include <linux/uuid.h> 42 #include <linux/kvm_host.h> 43 #include <linux/vfio.h> 44 #include <linux/mdev.h> 45 #include <linux/debugfs.h> 46 47 #include <linux/nospec.h> 48 49 #include "i915_drv.h" 50 #include "gvt.h" 51 52 static const struct intel_gvt_ops *intel_gvt_ops; 53 54 /* helper macros copied from vfio-pci */ 55 #define VFIO_PCI_OFFSET_SHIFT 40 56 #define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT) 57 #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT) 58 #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1) 59 60 #define EDID_BLOB_OFFSET (PAGE_SIZE/2) 61 62 #define OPREGION_SIGNATURE "IntelGraphicsMem" 63 64 struct vfio_region; 65 struct intel_vgpu_regops { 66 size_t (*rw)(struct intel_vgpu *vgpu, char *buf, 67 size_t count, loff_t *ppos, bool iswrite); 68 void (*release)(struct intel_vgpu *vgpu, 69 struct vfio_region *region); 70 }; 71 72 struct vfio_region { 73 u32 type; 74 u32 subtype; 75 size_t size; 76 u32 flags; 77 const struct intel_vgpu_regops *ops; 78 void *data; 79 }; 80 81 struct vfio_edid_region { 82 struct vfio_region_gfx_edid vfio_edid_regs; 83 void *edid_blob; 84 }; 85 86 struct kvmgt_pgfn { 87 gfn_t gfn; 88 struct hlist_node hnode; 89 }; 90 91 struct kvmgt_guest_info { 92 struct kvm *kvm; 93 struct intel_vgpu *vgpu; 94 struct kvm_page_track_notifier_node track_node; 95 #define NR_BKT (1 << 18) 96 struct hlist_head ptable[NR_BKT]; 97 #undef NR_BKT 98 struct dentry *debugfs_cache_entries; 99 }; 100 101 struct gvt_dma { 102 struct intel_vgpu *vgpu; 103 struct rb_node gfn_node; 104 struct rb_node dma_addr_node; 105 gfn_t gfn; 106 dma_addr_t dma_addr; 107 unsigned long size; 108 struct kref ref; 109 }; 110 111 static inline bool handle_valid(unsigned long handle) 112 { 113 return !!(handle & ~0xff); 114 } 115 116 static int kvmgt_guest_init(struct mdev_device *mdev); 117 static void intel_vgpu_release_work(struct work_struct *work); 118 static bool kvmgt_guest_exit(struct kvmgt_guest_info *info); 119 120 static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, 121 unsigned long size) 122 { 123 int total_pages; 124 int npage; 125 int ret; 126 127 total_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE; 128 129 for (npage = 0; npage < total_pages; npage++) { 130 unsigned long cur_gfn = gfn + npage; 131 132 ret = vfio_unpin_pages(mdev_dev(vgpu->vdev.mdev), &cur_gfn, 1); 133 WARN_ON(ret != 1); 134 } 135 } 136 137 /* Pin a normal or compound guest page for dma. */ 138 static int gvt_pin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, 139 unsigned long size, struct page **page) 140 { 141 unsigned long base_pfn = 0; 142 int total_pages; 143 int npage; 144 int ret; 145 146 total_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE; 147 /* 148 * We pin the pages one-by-one to avoid allocating a big arrary 149 * on stack to hold pfns. 150 */ 151 for (npage = 0; npage < total_pages; npage++) { 152 unsigned long cur_gfn = gfn + npage; 153 unsigned long pfn; 154 155 ret = vfio_pin_pages(mdev_dev(vgpu->vdev.mdev), &cur_gfn, 1, 156 IOMMU_READ | IOMMU_WRITE, &pfn); 157 if (ret != 1) { 158 gvt_vgpu_err("vfio_pin_pages failed for gfn 0x%lx, ret %d\n", 159 cur_gfn, ret); 160 goto err; 161 } 162 163 if (!pfn_valid(pfn)) { 164 gvt_vgpu_err("pfn 0x%lx is not mem backed\n", pfn); 165 npage++; 166 ret = -EFAULT; 167 goto err; 168 } 169 170 if (npage == 0) 171 base_pfn = pfn; 172 else if (base_pfn + npage != pfn) { 173 gvt_vgpu_err("The pages are not continuous\n"); 174 ret = -EINVAL; 175 npage++; 176 goto err; 177 } 178 } 179 180 *page = pfn_to_page(base_pfn); 181 return 0; 182 err: 183 gvt_unpin_guest_page(vgpu, gfn, npage * PAGE_SIZE); 184 return ret; 185 } 186 187 static int gvt_dma_map_page(struct intel_vgpu *vgpu, unsigned long gfn, 188 dma_addr_t *dma_addr, unsigned long size) 189 { 190 struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev; 191 struct page *page = NULL; 192 int ret; 193 194 ret = gvt_pin_guest_page(vgpu, gfn, size, &page); 195 if (ret) 196 return ret; 197 198 /* Setup DMA mapping. */ 199 *dma_addr = dma_map_page(dev, page, 0, size, PCI_DMA_BIDIRECTIONAL); 200 if (dma_mapping_error(dev, *dma_addr)) { 201 gvt_vgpu_err("DMA mapping failed for pfn 0x%lx, ret %d\n", 202 page_to_pfn(page), ret); 203 gvt_unpin_guest_page(vgpu, gfn, size); 204 return -ENOMEM; 205 } 206 207 return 0; 208 } 209 210 static void gvt_dma_unmap_page(struct intel_vgpu *vgpu, unsigned long gfn, 211 dma_addr_t dma_addr, unsigned long size) 212 { 213 struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev; 214 215 dma_unmap_page(dev, dma_addr, size, PCI_DMA_BIDIRECTIONAL); 216 gvt_unpin_guest_page(vgpu, gfn, size); 217 } 218 219 static struct gvt_dma *__gvt_cache_find_dma_addr(struct intel_vgpu *vgpu, 220 dma_addr_t dma_addr) 221 { 222 struct rb_node *node = vgpu->vdev.dma_addr_cache.rb_node; 223 struct gvt_dma *itr; 224 225 while (node) { 226 itr = rb_entry(node, struct gvt_dma, dma_addr_node); 227 228 if (dma_addr < itr->dma_addr) 229 node = node->rb_left; 230 else if (dma_addr > itr->dma_addr) 231 node = node->rb_right; 232 else 233 return itr; 234 } 235 return NULL; 236 } 237 238 static struct gvt_dma *__gvt_cache_find_gfn(struct intel_vgpu *vgpu, gfn_t gfn) 239 { 240 struct rb_node *node = vgpu->vdev.gfn_cache.rb_node; 241 struct gvt_dma *itr; 242 243 while (node) { 244 itr = rb_entry(node, struct gvt_dma, gfn_node); 245 246 if (gfn < itr->gfn) 247 node = node->rb_left; 248 else if (gfn > itr->gfn) 249 node = node->rb_right; 250 else 251 return itr; 252 } 253 return NULL; 254 } 255 256 static int __gvt_cache_add(struct intel_vgpu *vgpu, gfn_t gfn, 257 dma_addr_t dma_addr, unsigned long size) 258 { 259 struct gvt_dma *new, *itr; 260 struct rb_node **link, *parent = NULL; 261 262 new = kzalloc(sizeof(struct gvt_dma), GFP_KERNEL); 263 if (!new) 264 return -ENOMEM; 265 266 new->vgpu = vgpu; 267 new->gfn = gfn; 268 new->dma_addr = dma_addr; 269 new->size = size; 270 kref_init(&new->ref); 271 272 /* gfn_cache maps gfn to struct gvt_dma. */ 273 link = &vgpu->vdev.gfn_cache.rb_node; 274 while (*link) { 275 parent = *link; 276 itr = rb_entry(parent, struct gvt_dma, gfn_node); 277 278 if (gfn < itr->gfn) 279 link = &parent->rb_left; 280 else 281 link = &parent->rb_right; 282 } 283 rb_link_node(&new->gfn_node, parent, link); 284 rb_insert_color(&new->gfn_node, &vgpu->vdev.gfn_cache); 285 286 /* dma_addr_cache maps dma addr to struct gvt_dma. */ 287 parent = NULL; 288 link = &vgpu->vdev.dma_addr_cache.rb_node; 289 while (*link) { 290 parent = *link; 291 itr = rb_entry(parent, struct gvt_dma, dma_addr_node); 292 293 if (dma_addr < itr->dma_addr) 294 link = &parent->rb_left; 295 else 296 link = &parent->rb_right; 297 } 298 rb_link_node(&new->dma_addr_node, parent, link); 299 rb_insert_color(&new->dma_addr_node, &vgpu->vdev.dma_addr_cache); 300 301 vgpu->vdev.nr_cache_entries++; 302 return 0; 303 } 304 305 static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu, 306 struct gvt_dma *entry) 307 { 308 rb_erase(&entry->gfn_node, &vgpu->vdev.gfn_cache); 309 rb_erase(&entry->dma_addr_node, &vgpu->vdev.dma_addr_cache); 310 kfree(entry); 311 vgpu->vdev.nr_cache_entries--; 312 } 313 314 static void gvt_cache_destroy(struct intel_vgpu *vgpu) 315 { 316 struct gvt_dma *dma; 317 struct rb_node *node = NULL; 318 319 for (;;) { 320 mutex_lock(&vgpu->vdev.cache_lock); 321 node = rb_first(&vgpu->vdev.gfn_cache); 322 if (!node) { 323 mutex_unlock(&vgpu->vdev.cache_lock); 324 break; 325 } 326 dma = rb_entry(node, struct gvt_dma, gfn_node); 327 gvt_dma_unmap_page(vgpu, dma->gfn, dma->dma_addr, dma->size); 328 __gvt_cache_remove_entry(vgpu, dma); 329 mutex_unlock(&vgpu->vdev.cache_lock); 330 } 331 } 332 333 static void gvt_cache_init(struct intel_vgpu *vgpu) 334 { 335 vgpu->vdev.gfn_cache = RB_ROOT; 336 vgpu->vdev.dma_addr_cache = RB_ROOT; 337 vgpu->vdev.nr_cache_entries = 0; 338 mutex_init(&vgpu->vdev.cache_lock); 339 } 340 341 static void kvmgt_protect_table_init(struct kvmgt_guest_info *info) 342 { 343 hash_init(info->ptable); 344 } 345 346 static void kvmgt_protect_table_destroy(struct kvmgt_guest_info *info) 347 { 348 struct kvmgt_pgfn *p; 349 struct hlist_node *tmp; 350 int i; 351 352 hash_for_each_safe(info->ptable, i, tmp, p, hnode) { 353 hash_del(&p->hnode); 354 kfree(p); 355 } 356 } 357 358 static struct kvmgt_pgfn * 359 __kvmgt_protect_table_find(struct kvmgt_guest_info *info, gfn_t gfn) 360 { 361 struct kvmgt_pgfn *p, *res = NULL; 362 363 hash_for_each_possible(info->ptable, p, hnode, gfn) { 364 if (gfn == p->gfn) { 365 res = p; 366 break; 367 } 368 } 369 370 return res; 371 } 372 373 static bool kvmgt_gfn_is_write_protected(struct kvmgt_guest_info *info, 374 gfn_t gfn) 375 { 376 struct kvmgt_pgfn *p; 377 378 p = __kvmgt_protect_table_find(info, gfn); 379 return !!p; 380 } 381 382 static void kvmgt_protect_table_add(struct kvmgt_guest_info *info, gfn_t gfn) 383 { 384 struct kvmgt_pgfn *p; 385 386 if (kvmgt_gfn_is_write_protected(info, gfn)) 387 return; 388 389 p = kzalloc(sizeof(struct kvmgt_pgfn), GFP_ATOMIC); 390 if (WARN(!p, "gfn: 0x%llx\n", gfn)) 391 return; 392 393 p->gfn = gfn; 394 hash_add(info->ptable, &p->hnode, gfn); 395 } 396 397 static void kvmgt_protect_table_del(struct kvmgt_guest_info *info, 398 gfn_t gfn) 399 { 400 struct kvmgt_pgfn *p; 401 402 p = __kvmgt_protect_table_find(info, gfn); 403 if (p) { 404 hash_del(&p->hnode); 405 kfree(p); 406 } 407 } 408 409 static size_t intel_vgpu_reg_rw_opregion(struct intel_vgpu *vgpu, char *buf, 410 size_t count, loff_t *ppos, bool iswrite) 411 { 412 unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - 413 VFIO_PCI_NUM_REGIONS; 414 void *base = vgpu->vdev.region[i].data; 415 loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; 416 417 if (pos >= vgpu->vdev.region[i].size || iswrite) { 418 gvt_vgpu_err("invalid op or offset for Intel vgpu OpRegion\n"); 419 return -EINVAL; 420 } 421 count = min(count, (size_t)(vgpu->vdev.region[i].size - pos)); 422 memcpy(buf, base + pos, count); 423 424 return count; 425 } 426 427 static void intel_vgpu_reg_release_opregion(struct intel_vgpu *vgpu, 428 struct vfio_region *region) 429 { 430 } 431 432 static const struct intel_vgpu_regops intel_vgpu_regops_opregion = { 433 .rw = intel_vgpu_reg_rw_opregion, 434 .release = intel_vgpu_reg_release_opregion, 435 }; 436 437 static int handle_edid_regs(struct intel_vgpu *vgpu, 438 struct vfio_edid_region *region, char *buf, 439 size_t count, u16 offset, bool is_write) 440 { 441 struct vfio_region_gfx_edid *regs = ®ion->vfio_edid_regs; 442 unsigned int data; 443 444 if (offset + count > sizeof(*regs)) 445 return -EINVAL; 446 447 if (count != 4) 448 return -EINVAL; 449 450 if (is_write) { 451 data = *((unsigned int *)buf); 452 switch (offset) { 453 case offsetof(struct vfio_region_gfx_edid, link_state): 454 if (data == VFIO_DEVICE_GFX_LINK_STATE_UP) { 455 if (!drm_edid_block_valid( 456 (u8 *)region->edid_blob, 457 0, 458 true, 459 NULL)) { 460 gvt_vgpu_err("invalid EDID blob\n"); 461 return -EINVAL; 462 } 463 intel_gvt_ops->emulate_hotplug(vgpu, true); 464 } else if (data == VFIO_DEVICE_GFX_LINK_STATE_DOWN) 465 intel_gvt_ops->emulate_hotplug(vgpu, false); 466 else { 467 gvt_vgpu_err("invalid EDID link state %d\n", 468 regs->link_state); 469 return -EINVAL; 470 } 471 regs->link_state = data; 472 break; 473 case offsetof(struct vfio_region_gfx_edid, edid_size): 474 if (data > regs->edid_max_size) { 475 gvt_vgpu_err("EDID size is bigger than %d!\n", 476 regs->edid_max_size); 477 return -EINVAL; 478 } 479 regs->edid_size = data; 480 break; 481 default: 482 /* read-only regs */ 483 gvt_vgpu_err("write read-only EDID region at offset %d\n", 484 offset); 485 return -EPERM; 486 } 487 } else { 488 memcpy(buf, (char *)regs + offset, count); 489 } 490 491 return count; 492 } 493 494 static int handle_edid_blob(struct vfio_edid_region *region, char *buf, 495 size_t count, u16 offset, bool is_write) 496 { 497 if (offset + count > region->vfio_edid_regs.edid_size) 498 return -EINVAL; 499 500 if (is_write) 501 memcpy(region->edid_blob + offset, buf, count); 502 else 503 memcpy(buf, region->edid_blob + offset, count); 504 505 return count; 506 } 507 508 static size_t intel_vgpu_reg_rw_edid(struct intel_vgpu *vgpu, char *buf, 509 size_t count, loff_t *ppos, bool iswrite) 510 { 511 int ret; 512 unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - 513 VFIO_PCI_NUM_REGIONS; 514 struct vfio_edid_region *region = 515 (struct vfio_edid_region *)vgpu->vdev.region[i].data; 516 loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; 517 518 if (pos < region->vfio_edid_regs.edid_offset) { 519 ret = handle_edid_regs(vgpu, region, buf, count, pos, iswrite); 520 } else { 521 pos -= EDID_BLOB_OFFSET; 522 ret = handle_edid_blob(region, buf, count, pos, iswrite); 523 } 524 525 if (ret < 0) 526 gvt_vgpu_err("failed to access EDID region\n"); 527 528 return ret; 529 } 530 531 static void intel_vgpu_reg_release_edid(struct intel_vgpu *vgpu, 532 struct vfio_region *region) 533 { 534 kfree(region->data); 535 } 536 537 static const struct intel_vgpu_regops intel_vgpu_regops_edid = { 538 .rw = intel_vgpu_reg_rw_edid, 539 .release = intel_vgpu_reg_release_edid, 540 }; 541 542 static int intel_vgpu_register_reg(struct intel_vgpu *vgpu, 543 unsigned int type, unsigned int subtype, 544 const struct intel_vgpu_regops *ops, 545 size_t size, u32 flags, void *data) 546 { 547 struct vfio_region *region; 548 549 region = krealloc(vgpu->vdev.region, 550 (vgpu->vdev.num_regions + 1) * sizeof(*region), 551 GFP_KERNEL); 552 if (!region) 553 return -ENOMEM; 554 555 vgpu->vdev.region = region; 556 vgpu->vdev.region[vgpu->vdev.num_regions].type = type; 557 vgpu->vdev.region[vgpu->vdev.num_regions].subtype = subtype; 558 vgpu->vdev.region[vgpu->vdev.num_regions].ops = ops; 559 vgpu->vdev.region[vgpu->vdev.num_regions].size = size; 560 vgpu->vdev.region[vgpu->vdev.num_regions].flags = flags; 561 vgpu->vdev.region[vgpu->vdev.num_regions].data = data; 562 vgpu->vdev.num_regions++; 563 return 0; 564 } 565 566 static int kvmgt_get_vfio_device(void *p_vgpu) 567 { 568 struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu; 569 570 vgpu->vdev.vfio_device = vfio_device_get_from_dev( 571 mdev_dev(vgpu->vdev.mdev)); 572 if (!vgpu->vdev.vfio_device) { 573 gvt_vgpu_err("failed to get vfio device\n"); 574 return -ENODEV; 575 } 576 return 0; 577 } 578 579 580 static int kvmgt_set_opregion(void *p_vgpu) 581 { 582 struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu; 583 void *base; 584 int ret; 585 586 /* Each vgpu has its own opregion, although VFIO would create another 587 * one later. This one is used to expose opregion to VFIO. And the 588 * other one created by VFIO later, is used by guest actually. 589 */ 590 base = vgpu_opregion(vgpu)->va; 591 if (!base) 592 return -ENOMEM; 593 594 if (memcmp(base, OPREGION_SIGNATURE, 16)) { 595 memunmap(base); 596 return -EINVAL; 597 } 598 599 ret = intel_vgpu_register_reg(vgpu, 600 PCI_VENDOR_ID_INTEL | VFIO_REGION_TYPE_PCI_VENDOR_TYPE, 601 VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION, 602 &intel_vgpu_regops_opregion, OPREGION_SIZE, 603 VFIO_REGION_INFO_FLAG_READ, base); 604 605 return ret; 606 } 607 608 static int kvmgt_set_edid(void *p_vgpu, int port_num) 609 { 610 struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu; 611 struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num); 612 struct vfio_edid_region *base; 613 int ret; 614 615 base = kzalloc(sizeof(*base), GFP_KERNEL); 616 if (!base) 617 return -ENOMEM; 618 619 /* TODO: Add multi-port and EDID extension block support */ 620 base->vfio_edid_regs.edid_offset = EDID_BLOB_OFFSET; 621 base->vfio_edid_regs.edid_max_size = EDID_SIZE; 622 base->vfio_edid_regs.edid_size = EDID_SIZE; 623 base->vfio_edid_regs.max_xres = vgpu_edid_xres(port->id); 624 base->vfio_edid_regs.max_yres = vgpu_edid_yres(port->id); 625 base->edid_blob = port->edid->edid_block; 626 627 ret = intel_vgpu_register_reg(vgpu, 628 VFIO_REGION_TYPE_GFX, 629 VFIO_REGION_SUBTYPE_GFX_EDID, 630 &intel_vgpu_regops_edid, EDID_SIZE, 631 VFIO_REGION_INFO_FLAG_READ | 632 VFIO_REGION_INFO_FLAG_WRITE | 633 VFIO_REGION_INFO_FLAG_CAPS, base); 634 635 return ret; 636 } 637 638 static void kvmgt_put_vfio_device(void *vgpu) 639 { 640 if (WARN_ON(!((struct intel_vgpu *)vgpu)->vdev.vfio_device)) 641 return; 642 643 vfio_device_put(((struct intel_vgpu *)vgpu)->vdev.vfio_device); 644 } 645 646 static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev) 647 { 648 struct intel_vgpu *vgpu = NULL; 649 struct intel_vgpu_type *type; 650 struct device *pdev; 651 void *gvt; 652 int ret; 653 654 pdev = mdev_parent_dev(mdev); 655 gvt = kdev_to_i915(pdev)->gvt; 656 657 type = intel_gvt_ops->gvt_find_vgpu_type(gvt, kobject_name(kobj)); 658 if (!type) { 659 gvt_vgpu_err("failed to find type %s to create\n", 660 kobject_name(kobj)); 661 ret = -EINVAL; 662 goto out; 663 } 664 665 vgpu = intel_gvt_ops->vgpu_create(gvt, type); 666 if (IS_ERR_OR_NULL(vgpu)) { 667 ret = vgpu == NULL ? -EFAULT : PTR_ERR(vgpu); 668 gvt_err("failed to create intel vgpu: %d\n", ret); 669 goto out; 670 } 671 672 INIT_WORK(&vgpu->vdev.release_work, intel_vgpu_release_work); 673 674 vgpu->vdev.mdev = mdev; 675 mdev_set_drvdata(mdev, vgpu); 676 677 gvt_dbg_core("intel_vgpu_create succeeded for mdev: %s\n", 678 dev_name(mdev_dev(mdev))); 679 ret = 0; 680 681 out: 682 return ret; 683 } 684 685 static int intel_vgpu_remove(struct mdev_device *mdev) 686 { 687 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 688 689 if (handle_valid(vgpu->handle)) 690 return -EBUSY; 691 692 intel_gvt_ops->vgpu_destroy(vgpu); 693 return 0; 694 } 695 696 static int intel_vgpu_iommu_notifier(struct notifier_block *nb, 697 unsigned long action, void *data) 698 { 699 struct intel_vgpu *vgpu = container_of(nb, 700 struct intel_vgpu, 701 vdev.iommu_notifier); 702 703 if (action == VFIO_IOMMU_NOTIFY_DMA_UNMAP) { 704 struct vfio_iommu_type1_dma_unmap *unmap = data; 705 struct gvt_dma *entry; 706 unsigned long iov_pfn, end_iov_pfn; 707 708 iov_pfn = unmap->iova >> PAGE_SHIFT; 709 end_iov_pfn = iov_pfn + unmap->size / PAGE_SIZE; 710 711 mutex_lock(&vgpu->vdev.cache_lock); 712 for (; iov_pfn < end_iov_pfn; iov_pfn++) { 713 entry = __gvt_cache_find_gfn(vgpu, iov_pfn); 714 if (!entry) 715 continue; 716 717 gvt_dma_unmap_page(vgpu, entry->gfn, entry->dma_addr, 718 entry->size); 719 __gvt_cache_remove_entry(vgpu, entry); 720 } 721 mutex_unlock(&vgpu->vdev.cache_lock); 722 } 723 724 return NOTIFY_OK; 725 } 726 727 static int intel_vgpu_group_notifier(struct notifier_block *nb, 728 unsigned long action, void *data) 729 { 730 struct intel_vgpu *vgpu = container_of(nb, 731 struct intel_vgpu, 732 vdev.group_notifier); 733 734 /* the only action we care about */ 735 if (action == VFIO_GROUP_NOTIFY_SET_KVM) { 736 vgpu->vdev.kvm = data; 737 738 if (!data) 739 schedule_work(&vgpu->vdev.release_work); 740 } 741 742 return NOTIFY_OK; 743 } 744 745 static int intel_vgpu_open(struct mdev_device *mdev) 746 { 747 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 748 unsigned long events; 749 int ret; 750 751 vgpu->vdev.iommu_notifier.notifier_call = intel_vgpu_iommu_notifier; 752 vgpu->vdev.group_notifier.notifier_call = intel_vgpu_group_notifier; 753 754 events = VFIO_IOMMU_NOTIFY_DMA_UNMAP; 755 ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, &events, 756 &vgpu->vdev.iommu_notifier); 757 if (ret != 0) { 758 gvt_vgpu_err("vfio_register_notifier for iommu failed: %d\n", 759 ret); 760 goto out; 761 } 762 763 events = VFIO_GROUP_NOTIFY_SET_KVM; 764 ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &events, 765 &vgpu->vdev.group_notifier); 766 if (ret != 0) { 767 gvt_vgpu_err("vfio_register_notifier for group failed: %d\n", 768 ret); 769 goto undo_iommu; 770 } 771 772 /* Take a module reference as mdev core doesn't take 773 * a reference for vendor driver. 774 */ 775 if (!try_module_get(THIS_MODULE)) 776 goto undo_group; 777 778 ret = kvmgt_guest_init(mdev); 779 if (ret) 780 goto undo_group; 781 782 intel_gvt_ops->vgpu_activate(vgpu); 783 784 atomic_set(&vgpu->vdev.released, 0); 785 return ret; 786 787 undo_group: 788 vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, 789 &vgpu->vdev.group_notifier); 790 791 undo_iommu: 792 vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, 793 &vgpu->vdev.iommu_notifier); 794 out: 795 return ret; 796 } 797 798 static void intel_vgpu_release_msi_eventfd_ctx(struct intel_vgpu *vgpu) 799 { 800 struct eventfd_ctx *trigger; 801 802 trigger = vgpu->vdev.msi_trigger; 803 if (trigger) { 804 eventfd_ctx_put(trigger); 805 vgpu->vdev.msi_trigger = NULL; 806 } 807 } 808 809 static void __intel_vgpu_release(struct intel_vgpu *vgpu) 810 { 811 struct kvmgt_guest_info *info; 812 int ret; 813 814 if (!handle_valid(vgpu->handle)) 815 return; 816 817 if (atomic_cmpxchg(&vgpu->vdev.released, 0, 1)) 818 return; 819 820 intel_gvt_ops->vgpu_release(vgpu); 821 822 ret = vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_IOMMU_NOTIFY, 823 &vgpu->vdev.iommu_notifier); 824 WARN(ret, "vfio_unregister_notifier for iommu failed: %d\n", ret); 825 826 ret = vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_GROUP_NOTIFY, 827 &vgpu->vdev.group_notifier); 828 WARN(ret, "vfio_unregister_notifier for group failed: %d\n", ret); 829 830 /* dereference module reference taken at open */ 831 module_put(THIS_MODULE); 832 833 info = (struct kvmgt_guest_info *)vgpu->handle; 834 kvmgt_guest_exit(info); 835 836 intel_vgpu_release_msi_eventfd_ctx(vgpu); 837 838 vgpu->vdev.kvm = NULL; 839 vgpu->handle = 0; 840 } 841 842 static void intel_vgpu_release(struct mdev_device *mdev) 843 { 844 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 845 846 __intel_vgpu_release(vgpu); 847 } 848 849 static void intel_vgpu_release_work(struct work_struct *work) 850 { 851 struct intel_vgpu *vgpu = container_of(work, struct intel_vgpu, 852 vdev.release_work); 853 854 __intel_vgpu_release(vgpu); 855 } 856 857 static u64 intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar) 858 { 859 u32 start_lo, start_hi; 860 u32 mem_type; 861 862 start_lo = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) & 863 PCI_BASE_ADDRESS_MEM_MASK; 864 mem_type = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) & 865 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 866 867 switch (mem_type) { 868 case PCI_BASE_ADDRESS_MEM_TYPE_64: 869 start_hi = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space 870 + bar + 4)); 871 break; 872 case PCI_BASE_ADDRESS_MEM_TYPE_32: 873 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 874 /* 1M mem BAR treated as 32-bit BAR */ 875 default: 876 /* mem unknown type treated as 32-bit BAR */ 877 start_hi = 0; 878 break; 879 } 880 881 return ((u64)start_hi << 32) | start_lo; 882 } 883 884 static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, u64 off, 885 void *buf, unsigned int count, bool is_write) 886 { 887 u64 bar_start = intel_vgpu_get_bar_addr(vgpu, bar); 888 int ret; 889 890 if (is_write) 891 ret = intel_gvt_ops->emulate_mmio_write(vgpu, 892 bar_start + off, buf, count); 893 else 894 ret = intel_gvt_ops->emulate_mmio_read(vgpu, 895 bar_start + off, buf, count); 896 return ret; 897 } 898 899 static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, u64 off) 900 { 901 return off >= vgpu_aperture_offset(vgpu) && 902 off < vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu); 903 } 904 905 static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, u64 off, 906 void *buf, unsigned long count, bool is_write) 907 { 908 void __iomem *aperture_va; 909 910 if (!intel_vgpu_in_aperture(vgpu, off) || 911 !intel_vgpu_in_aperture(vgpu, off + count)) { 912 gvt_vgpu_err("Invalid aperture offset %llu\n", off); 913 return -EINVAL; 914 } 915 916 aperture_va = io_mapping_map_wc(&vgpu->gvt->dev_priv->ggtt.iomap, 917 ALIGN_DOWN(off, PAGE_SIZE), 918 count + offset_in_page(off)); 919 if (!aperture_va) 920 return -EIO; 921 922 if (is_write) 923 memcpy_toio(aperture_va + offset_in_page(off), buf, count); 924 else 925 memcpy_fromio(buf, aperture_va + offset_in_page(off), count); 926 927 io_mapping_unmap(aperture_va); 928 929 return 0; 930 } 931 932 static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf, 933 size_t count, loff_t *ppos, bool is_write) 934 { 935 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 936 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); 937 u64 pos = *ppos & VFIO_PCI_OFFSET_MASK; 938 int ret = -EINVAL; 939 940 941 if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions) { 942 gvt_vgpu_err("invalid index: %u\n", index); 943 return -EINVAL; 944 } 945 946 switch (index) { 947 case VFIO_PCI_CONFIG_REGION_INDEX: 948 if (is_write) 949 ret = intel_gvt_ops->emulate_cfg_write(vgpu, pos, 950 buf, count); 951 else 952 ret = intel_gvt_ops->emulate_cfg_read(vgpu, pos, 953 buf, count); 954 break; 955 case VFIO_PCI_BAR0_REGION_INDEX: 956 ret = intel_vgpu_bar_rw(vgpu, PCI_BASE_ADDRESS_0, pos, 957 buf, count, is_write); 958 break; 959 case VFIO_PCI_BAR2_REGION_INDEX: 960 ret = intel_vgpu_aperture_rw(vgpu, pos, buf, count, is_write); 961 break; 962 case VFIO_PCI_BAR1_REGION_INDEX: 963 case VFIO_PCI_BAR3_REGION_INDEX: 964 case VFIO_PCI_BAR4_REGION_INDEX: 965 case VFIO_PCI_BAR5_REGION_INDEX: 966 case VFIO_PCI_VGA_REGION_INDEX: 967 case VFIO_PCI_ROM_REGION_INDEX: 968 break; 969 default: 970 if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions) 971 return -EINVAL; 972 973 index -= VFIO_PCI_NUM_REGIONS; 974 return vgpu->vdev.region[index].ops->rw(vgpu, buf, count, 975 ppos, is_write); 976 } 977 978 return ret == 0 ? count : ret; 979 } 980 981 static bool gtt_entry(struct mdev_device *mdev, loff_t *ppos) 982 { 983 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 984 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); 985 struct intel_gvt *gvt = vgpu->gvt; 986 int offset; 987 988 /* Only allow MMIO GGTT entry access */ 989 if (index != PCI_BASE_ADDRESS_0) 990 return false; 991 992 offset = (u64)(*ppos & VFIO_PCI_OFFSET_MASK) - 993 intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0); 994 995 return (offset >= gvt->device_info.gtt_start_offset && 996 offset < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt)) ? 997 true : false; 998 } 999 1000 static ssize_t intel_vgpu_read(struct mdev_device *mdev, char __user *buf, 1001 size_t count, loff_t *ppos) 1002 { 1003 unsigned int done = 0; 1004 int ret; 1005 1006 while (count) { 1007 size_t filled; 1008 1009 /* Only support GGTT entry 8 bytes read */ 1010 if (count >= 8 && !(*ppos % 8) && 1011 gtt_entry(mdev, ppos)) { 1012 u64 val; 1013 1014 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), 1015 ppos, false); 1016 if (ret <= 0) 1017 goto read_err; 1018 1019 if (copy_to_user(buf, &val, sizeof(val))) 1020 goto read_err; 1021 1022 filled = 8; 1023 } else if (count >= 4 && !(*ppos % 4)) { 1024 u32 val; 1025 1026 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), 1027 ppos, false); 1028 if (ret <= 0) 1029 goto read_err; 1030 1031 if (copy_to_user(buf, &val, sizeof(val))) 1032 goto read_err; 1033 1034 filled = 4; 1035 } else if (count >= 2 && !(*ppos % 2)) { 1036 u16 val; 1037 1038 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), 1039 ppos, false); 1040 if (ret <= 0) 1041 goto read_err; 1042 1043 if (copy_to_user(buf, &val, sizeof(val))) 1044 goto read_err; 1045 1046 filled = 2; 1047 } else { 1048 u8 val; 1049 1050 ret = intel_vgpu_rw(mdev, &val, sizeof(val), ppos, 1051 false); 1052 if (ret <= 0) 1053 goto read_err; 1054 1055 if (copy_to_user(buf, &val, sizeof(val))) 1056 goto read_err; 1057 1058 filled = 1; 1059 } 1060 1061 count -= filled; 1062 done += filled; 1063 *ppos += filled; 1064 buf += filled; 1065 } 1066 1067 return done; 1068 1069 read_err: 1070 return -EFAULT; 1071 } 1072 1073 static ssize_t intel_vgpu_write(struct mdev_device *mdev, 1074 const char __user *buf, 1075 size_t count, loff_t *ppos) 1076 { 1077 unsigned int done = 0; 1078 int ret; 1079 1080 while (count) { 1081 size_t filled; 1082 1083 /* Only support GGTT entry 8 bytes write */ 1084 if (count >= 8 && !(*ppos % 8) && 1085 gtt_entry(mdev, ppos)) { 1086 u64 val; 1087 1088 if (copy_from_user(&val, buf, sizeof(val))) 1089 goto write_err; 1090 1091 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), 1092 ppos, true); 1093 if (ret <= 0) 1094 goto write_err; 1095 1096 filled = 8; 1097 } else if (count >= 4 && !(*ppos % 4)) { 1098 u32 val; 1099 1100 if (copy_from_user(&val, buf, sizeof(val))) 1101 goto write_err; 1102 1103 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), 1104 ppos, true); 1105 if (ret <= 0) 1106 goto write_err; 1107 1108 filled = 4; 1109 } else if (count >= 2 && !(*ppos % 2)) { 1110 u16 val; 1111 1112 if (copy_from_user(&val, buf, sizeof(val))) 1113 goto write_err; 1114 1115 ret = intel_vgpu_rw(mdev, (char *)&val, 1116 sizeof(val), ppos, true); 1117 if (ret <= 0) 1118 goto write_err; 1119 1120 filled = 2; 1121 } else { 1122 u8 val; 1123 1124 if (copy_from_user(&val, buf, sizeof(val))) 1125 goto write_err; 1126 1127 ret = intel_vgpu_rw(mdev, &val, sizeof(val), 1128 ppos, true); 1129 if (ret <= 0) 1130 goto write_err; 1131 1132 filled = 1; 1133 } 1134 1135 count -= filled; 1136 done += filled; 1137 *ppos += filled; 1138 buf += filled; 1139 } 1140 1141 return done; 1142 write_err: 1143 return -EFAULT; 1144 } 1145 1146 static int intel_vgpu_mmap(struct mdev_device *mdev, struct vm_area_struct *vma) 1147 { 1148 unsigned int index; 1149 u64 virtaddr; 1150 unsigned long req_size, pgoff, req_start; 1151 pgprot_t pg_prot; 1152 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 1153 1154 index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); 1155 if (index >= VFIO_PCI_ROM_REGION_INDEX) 1156 return -EINVAL; 1157 1158 if (vma->vm_end < vma->vm_start) 1159 return -EINVAL; 1160 if ((vma->vm_flags & VM_SHARED) == 0) 1161 return -EINVAL; 1162 if (index != VFIO_PCI_BAR2_REGION_INDEX) 1163 return -EINVAL; 1164 1165 pg_prot = vma->vm_page_prot; 1166 virtaddr = vma->vm_start; 1167 req_size = vma->vm_end - vma->vm_start; 1168 pgoff = vma->vm_pgoff & 1169 ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); 1170 req_start = pgoff << PAGE_SHIFT; 1171 1172 if (!intel_vgpu_in_aperture(vgpu, req_start)) 1173 return -EINVAL; 1174 if (req_start + req_size > 1175 vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu)) 1176 return -EINVAL; 1177 1178 pgoff = (gvt_aperture_pa_base(vgpu->gvt) >> PAGE_SHIFT) + pgoff; 1179 1180 return remap_pfn_range(vma, virtaddr, pgoff, req_size, pg_prot); 1181 } 1182 1183 static int intel_vgpu_get_irq_count(struct intel_vgpu *vgpu, int type) 1184 { 1185 if (type == VFIO_PCI_INTX_IRQ_INDEX || type == VFIO_PCI_MSI_IRQ_INDEX) 1186 return 1; 1187 1188 return 0; 1189 } 1190 1191 static int intel_vgpu_set_intx_mask(struct intel_vgpu *vgpu, 1192 unsigned int index, unsigned int start, 1193 unsigned int count, u32 flags, 1194 void *data) 1195 { 1196 return 0; 1197 } 1198 1199 static int intel_vgpu_set_intx_unmask(struct intel_vgpu *vgpu, 1200 unsigned int index, unsigned int start, 1201 unsigned int count, u32 flags, void *data) 1202 { 1203 return 0; 1204 } 1205 1206 static int intel_vgpu_set_intx_trigger(struct intel_vgpu *vgpu, 1207 unsigned int index, unsigned int start, unsigned int count, 1208 u32 flags, void *data) 1209 { 1210 return 0; 1211 } 1212 1213 static int intel_vgpu_set_msi_trigger(struct intel_vgpu *vgpu, 1214 unsigned int index, unsigned int start, unsigned int count, 1215 u32 flags, void *data) 1216 { 1217 struct eventfd_ctx *trigger; 1218 1219 if (flags & VFIO_IRQ_SET_DATA_EVENTFD) { 1220 int fd = *(int *)data; 1221 1222 trigger = eventfd_ctx_fdget(fd); 1223 if (IS_ERR(trigger)) { 1224 gvt_vgpu_err("eventfd_ctx_fdget failed\n"); 1225 return PTR_ERR(trigger); 1226 } 1227 vgpu->vdev.msi_trigger = trigger; 1228 } else if ((flags & VFIO_IRQ_SET_DATA_NONE) && !count) 1229 intel_vgpu_release_msi_eventfd_ctx(vgpu); 1230 1231 return 0; 1232 } 1233 1234 static int intel_vgpu_set_irqs(struct intel_vgpu *vgpu, u32 flags, 1235 unsigned int index, unsigned int start, unsigned int count, 1236 void *data) 1237 { 1238 int (*func)(struct intel_vgpu *vgpu, unsigned int index, 1239 unsigned int start, unsigned int count, u32 flags, 1240 void *data) = NULL; 1241 1242 switch (index) { 1243 case VFIO_PCI_INTX_IRQ_INDEX: 1244 switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { 1245 case VFIO_IRQ_SET_ACTION_MASK: 1246 func = intel_vgpu_set_intx_mask; 1247 break; 1248 case VFIO_IRQ_SET_ACTION_UNMASK: 1249 func = intel_vgpu_set_intx_unmask; 1250 break; 1251 case VFIO_IRQ_SET_ACTION_TRIGGER: 1252 func = intel_vgpu_set_intx_trigger; 1253 break; 1254 } 1255 break; 1256 case VFIO_PCI_MSI_IRQ_INDEX: 1257 switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { 1258 case VFIO_IRQ_SET_ACTION_MASK: 1259 case VFIO_IRQ_SET_ACTION_UNMASK: 1260 /* XXX Need masking support exported */ 1261 break; 1262 case VFIO_IRQ_SET_ACTION_TRIGGER: 1263 func = intel_vgpu_set_msi_trigger; 1264 break; 1265 } 1266 break; 1267 } 1268 1269 if (!func) 1270 return -ENOTTY; 1271 1272 return func(vgpu, index, start, count, flags, data); 1273 } 1274 1275 static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd, 1276 unsigned long arg) 1277 { 1278 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); 1279 unsigned long minsz; 1280 1281 gvt_dbg_core("vgpu%d ioctl, cmd: %d\n", vgpu->id, cmd); 1282 1283 if (cmd == VFIO_DEVICE_GET_INFO) { 1284 struct vfio_device_info info; 1285 1286 minsz = offsetofend(struct vfio_device_info, num_irqs); 1287 1288 if (copy_from_user(&info, (void __user *)arg, minsz)) 1289 return -EFAULT; 1290 1291 if (info.argsz < minsz) 1292 return -EINVAL; 1293 1294 info.flags = VFIO_DEVICE_FLAGS_PCI; 1295 info.flags |= VFIO_DEVICE_FLAGS_RESET; 1296 info.num_regions = VFIO_PCI_NUM_REGIONS + 1297 vgpu->vdev.num_regions; 1298 info.num_irqs = VFIO_PCI_NUM_IRQS; 1299 1300 return copy_to_user((void __user *)arg, &info, minsz) ? 1301 -EFAULT : 0; 1302 1303 } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) { 1304 struct vfio_region_info info; 1305 struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; 1306 unsigned int i; 1307 int ret; 1308 struct vfio_region_info_cap_sparse_mmap *sparse = NULL; 1309 int nr_areas = 1; 1310 int cap_type_id; 1311 1312 minsz = offsetofend(struct vfio_region_info, offset); 1313 1314 if (copy_from_user(&info, (void __user *)arg, minsz)) 1315 return -EFAULT; 1316 1317 if (info.argsz < minsz) 1318 return -EINVAL; 1319 1320 switch (info.index) { 1321 case VFIO_PCI_CONFIG_REGION_INDEX: 1322 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1323 info.size = vgpu->gvt->device_info.cfg_space_size; 1324 info.flags = VFIO_REGION_INFO_FLAG_READ | 1325 VFIO_REGION_INFO_FLAG_WRITE; 1326 break; 1327 case VFIO_PCI_BAR0_REGION_INDEX: 1328 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1329 info.size = vgpu->cfg_space.bar[info.index].size; 1330 if (!info.size) { 1331 info.flags = 0; 1332 break; 1333 } 1334 1335 info.flags = VFIO_REGION_INFO_FLAG_READ | 1336 VFIO_REGION_INFO_FLAG_WRITE; 1337 break; 1338 case VFIO_PCI_BAR1_REGION_INDEX: 1339 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1340 info.size = 0; 1341 info.flags = 0; 1342 break; 1343 case VFIO_PCI_BAR2_REGION_INDEX: 1344 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1345 info.flags = VFIO_REGION_INFO_FLAG_CAPS | 1346 VFIO_REGION_INFO_FLAG_MMAP | 1347 VFIO_REGION_INFO_FLAG_READ | 1348 VFIO_REGION_INFO_FLAG_WRITE; 1349 info.size = gvt_aperture_sz(vgpu->gvt); 1350 1351 sparse = kzalloc(struct_size(sparse, areas, nr_areas), 1352 GFP_KERNEL); 1353 if (!sparse) 1354 return -ENOMEM; 1355 1356 sparse->header.id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; 1357 sparse->header.version = 1; 1358 sparse->nr_areas = nr_areas; 1359 cap_type_id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; 1360 sparse->areas[0].offset = 1361 PAGE_ALIGN(vgpu_aperture_offset(vgpu)); 1362 sparse->areas[0].size = vgpu_aperture_sz(vgpu); 1363 break; 1364 1365 case VFIO_PCI_BAR3_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: 1366 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1367 info.size = 0; 1368 info.flags = 0; 1369 1370 gvt_dbg_core("get region info bar:%d\n", info.index); 1371 break; 1372 1373 case VFIO_PCI_ROM_REGION_INDEX: 1374 case VFIO_PCI_VGA_REGION_INDEX: 1375 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1376 info.size = 0; 1377 info.flags = 0; 1378 1379 gvt_dbg_core("get region info index:%d\n", info.index); 1380 break; 1381 default: 1382 { 1383 struct vfio_region_info_cap_type cap_type = { 1384 .header.id = VFIO_REGION_INFO_CAP_TYPE, 1385 .header.version = 1 }; 1386 1387 if (info.index >= VFIO_PCI_NUM_REGIONS + 1388 vgpu->vdev.num_regions) 1389 return -EINVAL; 1390 info.index = 1391 array_index_nospec(info.index, 1392 VFIO_PCI_NUM_REGIONS + 1393 vgpu->vdev.num_regions); 1394 1395 i = info.index - VFIO_PCI_NUM_REGIONS; 1396 1397 info.offset = 1398 VFIO_PCI_INDEX_TO_OFFSET(info.index); 1399 info.size = vgpu->vdev.region[i].size; 1400 info.flags = vgpu->vdev.region[i].flags; 1401 1402 cap_type.type = vgpu->vdev.region[i].type; 1403 cap_type.subtype = vgpu->vdev.region[i].subtype; 1404 1405 ret = vfio_info_add_capability(&caps, 1406 &cap_type.header, 1407 sizeof(cap_type)); 1408 if (ret) 1409 return ret; 1410 } 1411 } 1412 1413 if ((info.flags & VFIO_REGION_INFO_FLAG_CAPS) && sparse) { 1414 switch (cap_type_id) { 1415 case VFIO_REGION_INFO_CAP_SPARSE_MMAP: 1416 ret = vfio_info_add_capability(&caps, 1417 &sparse->header, 1418 struct_size(sparse, areas, 1419 sparse->nr_areas)); 1420 if (ret) { 1421 kfree(sparse); 1422 return ret; 1423 } 1424 break; 1425 default: 1426 kfree(sparse); 1427 return -EINVAL; 1428 } 1429 } 1430 1431 if (caps.size) { 1432 info.flags |= VFIO_REGION_INFO_FLAG_CAPS; 1433 if (info.argsz < sizeof(info) + caps.size) { 1434 info.argsz = sizeof(info) + caps.size; 1435 info.cap_offset = 0; 1436 } else { 1437 vfio_info_cap_shift(&caps, sizeof(info)); 1438 if (copy_to_user((void __user *)arg + 1439 sizeof(info), caps.buf, 1440 caps.size)) { 1441 kfree(caps.buf); 1442 kfree(sparse); 1443 return -EFAULT; 1444 } 1445 info.cap_offset = sizeof(info); 1446 } 1447 1448 kfree(caps.buf); 1449 } 1450 1451 kfree(sparse); 1452 return copy_to_user((void __user *)arg, &info, minsz) ? 1453 -EFAULT : 0; 1454 } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) { 1455 struct vfio_irq_info info; 1456 1457 minsz = offsetofend(struct vfio_irq_info, count); 1458 1459 if (copy_from_user(&info, (void __user *)arg, minsz)) 1460 return -EFAULT; 1461 1462 if (info.argsz < minsz || info.index >= VFIO_PCI_NUM_IRQS) 1463 return -EINVAL; 1464 1465 switch (info.index) { 1466 case VFIO_PCI_INTX_IRQ_INDEX: 1467 case VFIO_PCI_MSI_IRQ_INDEX: 1468 break; 1469 default: 1470 return -EINVAL; 1471 } 1472 1473 info.flags = VFIO_IRQ_INFO_EVENTFD; 1474 1475 info.count = intel_vgpu_get_irq_count(vgpu, info.index); 1476 1477 if (info.index == VFIO_PCI_INTX_IRQ_INDEX) 1478 info.flags |= (VFIO_IRQ_INFO_MASKABLE | 1479 VFIO_IRQ_INFO_AUTOMASKED); 1480 else 1481 info.flags |= VFIO_IRQ_INFO_NORESIZE; 1482 1483 return copy_to_user((void __user *)arg, &info, minsz) ? 1484 -EFAULT : 0; 1485 } else if (cmd == VFIO_DEVICE_SET_IRQS) { 1486 struct vfio_irq_set hdr; 1487 u8 *data = NULL; 1488 int ret = 0; 1489 size_t data_size = 0; 1490 1491 minsz = offsetofend(struct vfio_irq_set, count); 1492 1493 if (copy_from_user(&hdr, (void __user *)arg, minsz)) 1494 return -EFAULT; 1495 1496 if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) { 1497 int max = intel_vgpu_get_irq_count(vgpu, hdr.index); 1498 1499 ret = vfio_set_irqs_validate_and_prepare(&hdr, max, 1500 VFIO_PCI_NUM_IRQS, &data_size); 1501 if (ret) { 1502 gvt_vgpu_err("intel:vfio_set_irqs_validate_and_prepare failed\n"); 1503 return -EINVAL; 1504 } 1505 if (data_size) { 1506 data = memdup_user((void __user *)(arg + minsz), 1507 data_size); 1508 if (IS_ERR(data)) 1509 return PTR_ERR(data); 1510 } 1511 } 1512 1513 ret = intel_vgpu_set_irqs(vgpu, hdr.flags, hdr.index, 1514 hdr.start, hdr.count, data); 1515 kfree(data); 1516 1517 return ret; 1518 } else if (cmd == VFIO_DEVICE_RESET) { 1519 intel_gvt_ops->vgpu_reset(vgpu); 1520 return 0; 1521 } else if (cmd == VFIO_DEVICE_QUERY_GFX_PLANE) { 1522 struct vfio_device_gfx_plane_info dmabuf; 1523 int ret = 0; 1524 1525 minsz = offsetofend(struct vfio_device_gfx_plane_info, 1526 dmabuf_id); 1527 if (copy_from_user(&dmabuf, (void __user *)arg, minsz)) 1528 return -EFAULT; 1529 if (dmabuf.argsz < minsz) 1530 return -EINVAL; 1531 1532 ret = intel_gvt_ops->vgpu_query_plane(vgpu, &dmabuf); 1533 if (ret != 0) 1534 return ret; 1535 1536 return copy_to_user((void __user *)arg, &dmabuf, minsz) ? 1537 -EFAULT : 0; 1538 } else if (cmd == VFIO_DEVICE_GET_GFX_DMABUF) { 1539 __u32 dmabuf_id; 1540 __s32 dmabuf_fd; 1541 1542 if (get_user(dmabuf_id, (__u32 __user *)arg)) 1543 return -EFAULT; 1544 1545 dmabuf_fd = intel_gvt_ops->vgpu_get_dmabuf(vgpu, dmabuf_id); 1546 return dmabuf_fd; 1547 1548 } 1549 1550 return -ENOTTY; 1551 } 1552 1553 static ssize_t 1554 vgpu_id_show(struct device *dev, struct device_attribute *attr, 1555 char *buf) 1556 { 1557 struct mdev_device *mdev = mdev_from_dev(dev); 1558 1559 if (mdev) { 1560 struct intel_vgpu *vgpu = (struct intel_vgpu *) 1561 mdev_get_drvdata(mdev); 1562 return sprintf(buf, "%d\n", vgpu->id); 1563 } 1564 return sprintf(buf, "\n"); 1565 } 1566 1567 static DEVICE_ATTR_RO(vgpu_id); 1568 1569 static struct attribute *intel_vgpu_attrs[] = { 1570 &dev_attr_vgpu_id.attr, 1571 NULL 1572 }; 1573 1574 static const struct attribute_group intel_vgpu_group = { 1575 .name = "intel_vgpu", 1576 .attrs = intel_vgpu_attrs, 1577 }; 1578 1579 static const struct attribute_group *intel_vgpu_groups[] = { 1580 &intel_vgpu_group, 1581 NULL, 1582 }; 1583 1584 static struct mdev_parent_ops intel_vgpu_ops = { 1585 .mdev_attr_groups = intel_vgpu_groups, 1586 .create = intel_vgpu_create, 1587 .remove = intel_vgpu_remove, 1588 1589 .open = intel_vgpu_open, 1590 .release = intel_vgpu_release, 1591 1592 .read = intel_vgpu_read, 1593 .write = intel_vgpu_write, 1594 .mmap = intel_vgpu_mmap, 1595 .ioctl = intel_vgpu_ioctl, 1596 }; 1597 1598 static int kvmgt_host_init(struct device *dev, void *gvt, const void *ops) 1599 { 1600 struct attribute **kvm_type_attrs; 1601 struct attribute_group **kvm_vgpu_type_groups; 1602 1603 intel_gvt_ops = ops; 1604 if (!intel_gvt_ops->get_gvt_attrs(&kvm_type_attrs, 1605 &kvm_vgpu_type_groups)) 1606 return -EFAULT; 1607 intel_vgpu_ops.supported_type_groups = kvm_vgpu_type_groups; 1608 1609 return mdev_register_device(dev, &intel_vgpu_ops); 1610 } 1611 1612 static void kvmgt_host_exit(struct device *dev) 1613 { 1614 mdev_unregister_device(dev); 1615 } 1616 1617 static int kvmgt_page_track_add(unsigned long handle, u64 gfn) 1618 { 1619 struct kvmgt_guest_info *info; 1620 struct kvm *kvm; 1621 struct kvm_memory_slot *slot; 1622 int idx; 1623 1624 if (!handle_valid(handle)) 1625 return -ESRCH; 1626 1627 info = (struct kvmgt_guest_info *)handle; 1628 kvm = info->kvm; 1629 1630 idx = srcu_read_lock(&kvm->srcu); 1631 slot = gfn_to_memslot(kvm, gfn); 1632 if (!slot) { 1633 srcu_read_unlock(&kvm->srcu, idx); 1634 return -EINVAL; 1635 } 1636 1637 spin_lock(&kvm->mmu_lock); 1638 1639 if (kvmgt_gfn_is_write_protected(info, gfn)) 1640 goto out; 1641 1642 kvm_slot_page_track_add_page(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE); 1643 kvmgt_protect_table_add(info, gfn); 1644 1645 out: 1646 spin_unlock(&kvm->mmu_lock); 1647 srcu_read_unlock(&kvm->srcu, idx); 1648 return 0; 1649 } 1650 1651 static int kvmgt_page_track_remove(unsigned long handle, u64 gfn) 1652 { 1653 struct kvmgt_guest_info *info; 1654 struct kvm *kvm; 1655 struct kvm_memory_slot *slot; 1656 int idx; 1657 1658 if (!handle_valid(handle)) 1659 return 0; 1660 1661 info = (struct kvmgt_guest_info *)handle; 1662 kvm = info->kvm; 1663 1664 idx = srcu_read_lock(&kvm->srcu); 1665 slot = gfn_to_memslot(kvm, gfn); 1666 if (!slot) { 1667 srcu_read_unlock(&kvm->srcu, idx); 1668 return -EINVAL; 1669 } 1670 1671 spin_lock(&kvm->mmu_lock); 1672 1673 if (!kvmgt_gfn_is_write_protected(info, gfn)) 1674 goto out; 1675 1676 kvm_slot_page_track_remove_page(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE); 1677 kvmgt_protect_table_del(info, gfn); 1678 1679 out: 1680 spin_unlock(&kvm->mmu_lock); 1681 srcu_read_unlock(&kvm->srcu, idx); 1682 return 0; 1683 } 1684 1685 static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, 1686 const u8 *val, int len, 1687 struct kvm_page_track_notifier_node *node) 1688 { 1689 struct kvmgt_guest_info *info = container_of(node, 1690 struct kvmgt_guest_info, track_node); 1691 1692 if (kvmgt_gfn_is_write_protected(info, gpa_to_gfn(gpa))) 1693 intel_gvt_ops->write_protect_handler(info->vgpu, gpa, 1694 (void *)val, len); 1695 } 1696 1697 static void kvmgt_page_track_flush_slot(struct kvm *kvm, 1698 struct kvm_memory_slot *slot, 1699 struct kvm_page_track_notifier_node *node) 1700 { 1701 int i; 1702 gfn_t gfn; 1703 struct kvmgt_guest_info *info = container_of(node, 1704 struct kvmgt_guest_info, track_node); 1705 1706 spin_lock(&kvm->mmu_lock); 1707 for (i = 0; i < slot->npages; i++) { 1708 gfn = slot->base_gfn + i; 1709 if (kvmgt_gfn_is_write_protected(info, gfn)) { 1710 kvm_slot_page_track_remove_page(kvm, slot, gfn, 1711 KVM_PAGE_TRACK_WRITE); 1712 kvmgt_protect_table_del(info, gfn); 1713 } 1714 } 1715 spin_unlock(&kvm->mmu_lock); 1716 } 1717 1718 static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu, struct kvm *kvm) 1719 { 1720 struct intel_vgpu *itr; 1721 struct kvmgt_guest_info *info; 1722 int id; 1723 bool ret = false; 1724 1725 mutex_lock(&vgpu->gvt->lock); 1726 for_each_active_vgpu(vgpu->gvt, itr, id) { 1727 if (!handle_valid(itr->handle)) 1728 continue; 1729 1730 info = (struct kvmgt_guest_info *)itr->handle; 1731 if (kvm && kvm == info->kvm) { 1732 ret = true; 1733 goto out; 1734 } 1735 } 1736 out: 1737 mutex_unlock(&vgpu->gvt->lock); 1738 return ret; 1739 } 1740 1741 static int kvmgt_guest_init(struct mdev_device *mdev) 1742 { 1743 struct kvmgt_guest_info *info; 1744 struct intel_vgpu *vgpu; 1745 struct kvm *kvm; 1746 1747 vgpu = mdev_get_drvdata(mdev); 1748 if (handle_valid(vgpu->handle)) 1749 return -EEXIST; 1750 1751 kvm = vgpu->vdev.kvm; 1752 if (!kvm || kvm->mm != current->mm) { 1753 gvt_vgpu_err("KVM is required to use Intel vGPU\n"); 1754 return -ESRCH; 1755 } 1756 1757 if (__kvmgt_vgpu_exist(vgpu, kvm)) 1758 return -EEXIST; 1759 1760 info = vzalloc(sizeof(struct kvmgt_guest_info)); 1761 if (!info) 1762 return -ENOMEM; 1763 1764 vgpu->handle = (unsigned long)info; 1765 info->vgpu = vgpu; 1766 info->kvm = kvm; 1767 kvm_get_kvm(info->kvm); 1768 1769 kvmgt_protect_table_init(info); 1770 gvt_cache_init(vgpu); 1771 1772 init_completion(&vgpu->vblank_done); 1773 1774 info->track_node.track_write = kvmgt_page_track_write; 1775 info->track_node.track_flush_slot = kvmgt_page_track_flush_slot; 1776 kvm_page_track_register_notifier(kvm, &info->track_node); 1777 1778 info->debugfs_cache_entries = debugfs_create_ulong( 1779 "kvmgt_nr_cache_entries", 1780 0444, vgpu->debugfs, 1781 &vgpu->vdev.nr_cache_entries); 1782 return 0; 1783 } 1784 1785 static bool kvmgt_guest_exit(struct kvmgt_guest_info *info) 1786 { 1787 debugfs_remove(info->debugfs_cache_entries); 1788 1789 kvm_page_track_unregister_notifier(info->kvm, &info->track_node); 1790 kvm_put_kvm(info->kvm); 1791 kvmgt_protect_table_destroy(info); 1792 gvt_cache_destroy(info->vgpu); 1793 vfree(info); 1794 1795 return true; 1796 } 1797 1798 static int kvmgt_attach_vgpu(void *vgpu, unsigned long *handle) 1799 { 1800 /* nothing to do here */ 1801 return 0; 1802 } 1803 1804 static void kvmgt_detach_vgpu(void *p_vgpu) 1805 { 1806 int i; 1807 struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu; 1808 1809 if (!vgpu->vdev.region) 1810 return; 1811 1812 for (i = 0; i < vgpu->vdev.num_regions; i++) 1813 if (vgpu->vdev.region[i].ops->release) 1814 vgpu->vdev.region[i].ops->release(vgpu, 1815 &vgpu->vdev.region[i]); 1816 vgpu->vdev.num_regions = 0; 1817 kfree(vgpu->vdev.region); 1818 vgpu->vdev.region = NULL; 1819 } 1820 1821 static int kvmgt_inject_msi(unsigned long handle, u32 addr, u16 data) 1822 { 1823 struct kvmgt_guest_info *info; 1824 struct intel_vgpu *vgpu; 1825 1826 if (!handle_valid(handle)) 1827 return -ESRCH; 1828 1829 info = (struct kvmgt_guest_info *)handle; 1830 vgpu = info->vgpu; 1831 1832 /* 1833 * When guest is poweroff, msi_trigger is set to NULL, but vgpu's 1834 * config and mmio register isn't restored to default during guest 1835 * poweroff. If this vgpu is still used in next vm, this vgpu's pipe 1836 * may be enabled, then once this vgpu is active, it will get inject 1837 * vblank interrupt request. But msi_trigger is null until msi is 1838 * enabled by guest. so if msi_trigger is null, success is still 1839 * returned and don't inject interrupt into guest. 1840 */ 1841 if (vgpu->vdev.msi_trigger == NULL) 1842 return 0; 1843 1844 if (eventfd_signal(vgpu->vdev.msi_trigger, 1) == 1) 1845 return 0; 1846 1847 return -EFAULT; 1848 } 1849 1850 static unsigned long kvmgt_gfn_to_pfn(unsigned long handle, unsigned long gfn) 1851 { 1852 struct kvmgt_guest_info *info; 1853 kvm_pfn_t pfn; 1854 1855 if (!handle_valid(handle)) 1856 return INTEL_GVT_INVALID_ADDR; 1857 1858 info = (struct kvmgt_guest_info *)handle; 1859 1860 pfn = gfn_to_pfn(info->kvm, gfn); 1861 if (is_error_noslot_pfn(pfn)) 1862 return INTEL_GVT_INVALID_ADDR; 1863 1864 return pfn; 1865 } 1866 1867 static int kvmgt_dma_map_guest_page(unsigned long handle, unsigned long gfn, 1868 unsigned long size, dma_addr_t *dma_addr) 1869 { 1870 struct kvmgt_guest_info *info; 1871 struct intel_vgpu *vgpu; 1872 struct gvt_dma *entry; 1873 int ret; 1874 1875 if (!handle_valid(handle)) 1876 return -EINVAL; 1877 1878 info = (struct kvmgt_guest_info *)handle; 1879 vgpu = info->vgpu; 1880 1881 mutex_lock(&info->vgpu->vdev.cache_lock); 1882 1883 entry = __gvt_cache_find_gfn(info->vgpu, gfn); 1884 if (!entry) { 1885 ret = gvt_dma_map_page(vgpu, gfn, dma_addr, size); 1886 if (ret) 1887 goto err_unlock; 1888 1889 ret = __gvt_cache_add(info->vgpu, gfn, *dma_addr, size); 1890 if (ret) 1891 goto err_unmap; 1892 } else if (entry->size != size) { 1893 /* the same gfn with different size: unmap and re-map */ 1894 gvt_dma_unmap_page(vgpu, gfn, entry->dma_addr, entry->size); 1895 __gvt_cache_remove_entry(vgpu, entry); 1896 1897 ret = gvt_dma_map_page(vgpu, gfn, dma_addr, size); 1898 if (ret) 1899 goto err_unlock; 1900 1901 ret = __gvt_cache_add(info->vgpu, gfn, *dma_addr, size); 1902 if (ret) 1903 goto err_unmap; 1904 } else { 1905 kref_get(&entry->ref); 1906 *dma_addr = entry->dma_addr; 1907 } 1908 1909 mutex_unlock(&info->vgpu->vdev.cache_lock); 1910 return 0; 1911 1912 err_unmap: 1913 gvt_dma_unmap_page(vgpu, gfn, *dma_addr, size); 1914 err_unlock: 1915 mutex_unlock(&info->vgpu->vdev.cache_lock); 1916 return ret; 1917 } 1918 1919 static void __gvt_dma_release(struct kref *ref) 1920 { 1921 struct gvt_dma *entry = container_of(ref, typeof(*entry), ref); 1922 1923 gvt_dma_unmap_page(entry->vgpu, entry->gfn, entry->dma_addr, 1924 entry->size); 1925 __gvt_cache_remove_entry(entry->vgpu, entry); 1926 } 1927 1928 static void kvmgt_dma_unmap_guest_page(unsigned long handle, dma_addr_t dma_addr) 1929 { 1930 struct kvmgt_guest_info *info; 1931 struct gvt_dma *entry; 1932 1933 if (!handle_valid(handle)) 1934 return; 1935 1936 info = (struct kvmgt_guest_info *)handle; 1937 1938 mutex_lock(&info->vgpu->vdev.cache_lock); 1939 entry = __gvt_cache_find_dma_addr(info->vgpu, dma_addr); 1940 if (entry) 1941 kref_put(&entry->ref, __gvt_dma_release); 1942 mutex_unlock(&info->vgpu->vdev.cache_lock); 1943 } 1944 1945 static int kvmgt_rw_gpa(unsigned long handle, unsigned long gpa, 1946 void *buf, unsigned long len, bool write) 1947 { 1948 struct kvmgt_guest_info *info; 1949 struct kvm *kvm; 1950 int idx, ret; 1951 bool kthread = current->mm == NULL; 1952 1953 if (!handle_valid(handle)) 1954 return -ESRCH; 1955 1956 info = (struct kvmgt_guest_info *)handle; 1957 kvm = info->kvm; 1958 1959 if (kthread) { 1960 if (!mmget_not_zero(kvm->mm)) 1961 return -EFAULT; 1962 use_mm(kvm->mm); 1963 } 1964 1965 idx = srcu_read_lock(&kvm->srcu); 1966 ret = write ? kvm_write_guest(kvm, gpa, buf, len) : 1967 kvm_read_guest(kvm, gpa, buf, len); 1968 srcu_read_unlock(&kvm->srcu, idx); 1969 1970 if (kthread) { 1971 unuse_mm(kvm->mm); 1972 mmput(kvm->mm); 1973 } 1974 1975 return ret; 1976 } 1977 1978 static int kvmgt_read_gpa(unsigned long handle, unsigned long gpa, 1979 void *buf, unsigned long len) 1980 { 1981 return kvmgt_rw_gpa(handle, gpa, buf, len, false); 1982 } 1983 1984 static int kvmgt_write_gpa(unsigned long handle, unsigned long gpa, 1985 void *buf, unsigned long len) 1986 { 1987 return kvmgt_rw_gpa(handle, gpa, buf, len, true); 1988 } 1989 1990 static unsigned long kvmgt_virt_to_pfn(void *addr) 1991 { 1992 return PFN_DOWN(__pa(addr)); 1993 } 1994 1995 static bool kvmgt_is_valid_gfn(unsigned long handle, unsigned long gfn) 1996 { 1997 struct kvmgt_guest_info *info; 1998 struct kvm *kvm; 1999 int idx; 2000 bool ret; 2001 2002 if (!handle_valid(handle)) 2003 return false; 2004 2005 info = (struct kvmgt_guest_info *)handle; 2006 kvm = info->kvm; 2007 2008 idx = srcu_read_lock(&kvm->srcu); 2009 ret = kvm_is_visible_gfn(kvm, gfn); 2010 srcu_read_unlock(&kvm->srcu, idx); 2011 2012 return ret; 2013 } 2014 2015 static struct intel_gvt_mpt kvmgt_mpt = { 2016 .type = INTEL_GVT_HYPERVISOR_KVM, 2017 .host_init = kvmgt_host_init, 2018 .host_exit = kvmgt_host_exit, 2019 .attach_vgpu = kvmgt_attach_vgpu, 2020 .detach_vgpu = kvmgt_detach_vgpu, 2021 .inject_msi = kvmgt_inject_msi, 2022 .from_virt_to_mfn = kvmgt_virt_to_pfn, 2023 .enable_page_track = kvmgt_page_track_add, 2024 .disable_page_track = kvmgt_page_track_remove, 2025 .read_gpa = kvmgt_read_gpa, 2026 .write_gpa = kvmgt_write_gpa, 2027 .gfn_to_mfn = kvmgt_gfn_to_pfn, 2028 .dma_map_guest_page = kvmgt_dma_map_guest_page, 2029 .dma_unmap_guest_page = kvmgt_dma_unmap_guest_page, 2030 .set_opregion = kvmgt_set_opregion, 2031 .set_edid = kvmgt_set_edid, 2032 .get_vfio_device = kvmgt_get_vfio_device, 2033 .put_vfio_device = kvmgt_put_vfio_device, 2034 .is_valid_gfn = kvmgt_is_valid_gfn, 2035 }; 2036 2037 static int __init kvmgt_init(void) 2038 { 2039 if (intel_gvt_register_hypervisor(&kvmgt_mpt) < 0) 2040 return -ENODEV; 2041 return 0; 2042 } 2043 2044 static void __exit kvmgt_exit(void) 2045 { 2046 intel_gvt_unregister_hypervisor(); 2047 } 2048 2049 module_init(kvmgt_init); 2050 module_exit(kvmgt_exit); 2051 2052 MODULE_LICENSE("GPL and additional rights"); 2053 MODULE_AUTHOR("Intel Corporation"); 2054