1/* 2 * KVMGT - the implementation of Intel mediated pass-through framework for KVM 3 * 4 * Copyright(c) 2011-2016 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 * Eddie Dong <eddie.dong@intel.com> 30 * 31 * Contributors: 32 * Niu Bing <bing.niu@intel.com> 33 * Zhi Wang <zhi.a.wang@intel.com> 34 */ 35 36#include <linux/init.h> 37#include <linux/mm.h> 38#include <linux/kthread.h> 39#include <linux/sched/mm.h> 40#include <linux/types.h> 41#include <linux/list.h> 42#include <linux/rbtree.h> 43#include <linux/spinlock.h> 44#include <linux/eventfd.h> 45#include <linux/mdev.h> 46#include <linux/debugfs.h> 47 48#include <linux/nospec.h> 49 50#include <drm/drm_edid.h> 51 52#include "i915_drv.h" 53#include "intel_gvt.h" 54#include "gvt.h" 55 56MODULE_IMPORT_NS(DMA_BUF); 57MODULE_IMPORT_NS(I915_GVT); 58 59/* helper macros copied from vfio-pci */ 60#define VFIO_PCI_OFFSET_SHIFT 40 61#define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT) 62#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT) 63#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1) 64 65#define EDID_BLOB_OFFSET (PAGE_SIZE/2) 66 67#define OPREGION_SIGNATURE "IntelGraphicsMem" 68 69struct vfio_region; 70struct intel_vgpu_regops { 71 size_t (*rw)(struct intel_vgpu *vgpu, char *buf, 72 size_t count, loff_t *ppos, bool iswrite); 73 void (*release)(struct intel_vgpu *vgpu, 74 struct vfio_region *region); 75}; 76 77struct vfio_region { 78 u32 type; 79 u32 subtype; 80 size_t size; 81 u32 flags; 82 const struct intel_vgpu_regops *ops; 83 void *data; 84}; 85 86struct vfio_edid_region { 87 struct vfio_region_gfx_edid vfio_edid_regs; 88 void *edid_blob; 89}; 90 91struct kvmgt_pgfn { 92 gfn_t gfn; 93 struct hlist_node hnode; 94}; 95 96struct gvt_dma { 97 struct intel_vgpu *vgpu; 98 struct rb_node gfn_node; 99 struct rb_node dma_addr_node; 100 gfn_t gfn; 101 dma_addr_t dma_addr; 102 unsigned long size; 103 struct kref ref; 104}; 105 106#define vfio_dev_to_vgpu(vfio_dev) \ 107 container_of((vfio_dev), struct intel_vgpu, vfio_device) 108 109static void kvmgt_page_track_write(gpa_t gpa, const u8 *val, int len, 110 struct kvm_page_track_notifier_node *node); 111static void kvmgt_page_track_remove_region(gfn_t gfn, unsigned long nr_pages, 112 struct kvm_page_track_notifier_node *node); 113 114static ssize_t intel_vgpu_show_description(struct mdev_type *mtype, char *buf) 115{ 116 struct intel_vgpu_type *type = 117 container_of(mtype, struct intel_vgpu_type, type); 118 119 return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n" 120 "fence: %d\nresolution: %s\n" 121 "weight: %d\n", 122 BYTES_TO_MB(type->conf->low_mm), 123 BYTES_TO_MB(type->conf->high_mm), 124 type->conf->fence, vgpu_edid_str(type->conf->edid), 125 type->conf->weight); 126} 127 128static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, 129 unsigned long size) 130{ 131 vfio_unpin_pages(&vgpu->vfio_device, gfn << PAGE_SHIFT, 132 DIV_ROUND_UP(size, PAGE_SIZE)); 133} 134 135/* Pin a normal or compound guest page for dma. */ 136static int gvt_pin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, 137 unsigned long size, struct page **page) 138{ 139 int total_pages = DIV_ROUND_UP(size, PAGE_SIZE); 140 struct page *base_page = NULL; 141 int npage; 142 int ret; 143 144 /* 145 * We pin the pages one-by-one to avoid allocating a big arrary 146 * on stack to hold pfns. 147 */ 148 for (npage = 0; npage < total_pages; npage++) { 149 dma_addr_t cur_iova = (gfn + npage) << PAGE_SHIFT; 150 struct page *cur_page; 151 152 ret = vfio_pin_pages(&vgpu->vfio_device, cur_iova, 1, 153 IOMMU_READ | IOMMU_WRITE, &cur_page); 154 if (ret != 1) { 155 gvt_vgpu_err("vfio_pin_pages failed for iova %pad, ret %d\n", 156 &cur_iova, ret); 157 goto err; 158 } 159 160 if (npage == 0) 161 base_page = cur_page; 162 else if (page_to_pfn(base_page) + npage != page_to_pfn(cur_page)) { 163 ret = -EINVAL; 164 npage++; 165 goto err; 166 } 167 } 168 169 *page = base_page; 170 return 0; 171err: 172 if (npage) 173 gvt_unpin_guest_page(vgpu, gfn, npage * PAGE_SIZE); 174 return ret; 175} 176 177static int gvt_dma_map_page(struct intel_vgpu *vgpu, unsigned long gfn, 178 dma_addr_t *dma_addr, unsigned long size) 179{ 180 struct device *dev = vgpu->gvt->gt->i915->drm.dev; 181 struct page *page = NULL; 182 int ret; 183 184 ret = gvt_pin_guest_page(vgpu, gfn, size, &page); 185 if (ret) 186 return ret; 187 188 /* Setup DMA mapping. */ 189 *dma_addr = dma_map_page(dev, page, 0, size, DMA_BIDIRECTIONAL); 190 if (dma_mapping_error(dev, *dma_addr)) { 191 gvt_vgpu_err("DMA mapping failed for pfn 0x%lx, ret %d\n", 192 page_to_pfn(page), ret); 193 gvt_unpin_guest_page(vgpu, gfn, size); 194 return -ENOMEM; 195 } 196 197 return 0; 198} 199 200static void gvt_dma_unmap_page(struct intel_vgpu *vgpu, unsigned long gfn, 201 dma_addr_t dma_addr, unsigned long size) 202{ 203 struct device *dev = vgpu->gvt->gt->i915->drm.dev; 204 205 dma_unmap_page(dev, dma_addr, size, DMA_BIDIRECTIONAL); 206 gvt_unpin_guest_page(vgpu, gfn, size); 207} 208 209static struct gvt_dma *__gvt_cache_find_dma_addr(struct intel_vgpu *vgpu, 210 dma_addr_t dma_addr) 211{ 212 struct rb_node *node = vgpu->dma_addr_cache.rb_node; 213 struct gvt_dma *itr; 214 215 while (node) { 216 itr = rb_entry(node, struct gvt_dma, dma_addr_node); 217 218 if (dma_addr < itr->dma_addr) 219 node = node->rb_left; 220 else if (dma_addr > itr->dma_addr) 221 node = node->rb_right; 222 else 223 return itr; 224 } 225 return NULL; 226} 227 228static struct gvt_dma *__gvt_cache_find_gfn(struct intel_vgpu *vgpu, gfn_t gfn) 229{ 230 struct rb_node *node = vgpu->gfn_cache.rb_node; 231 struct gvt_dma *itr; 232 233 while (node) { 234 itr = rb_entry(node, struct gvt_dma, gfn_node); 235 236 if (gfn < itr->gfn) 237 node = node->rb_left; 238 else if (gfn > itr->gfn) 239 node = node->rb_right; 240 else 241 return itr; 242 } 243 return NULL; 244} 245 246static int __gvt_cache_add(struct intel_vgpu *vgpu, gfn_t gfn, 247 dma_addr_t dma_addr, unsigned long size) 248{ 249 struct gvt_dma *new, *itr; 250 struct rb_node **link, *parent = NULL; 251 252 new = kzalloc(sizeof(struct gvt_dma), GFP_KERNEL); 253 if (!new) 254 return -ENOMEM; 255 256 new->vgpu = vgpu; 257 new->gfn = gfn; 258 new->dma_addr = dma_addr; 259 new->size = size; 260 kref_init(&new->ref); 261 262 /* gfn_cache maps gfn to struct gvt_dma. */ 263 link = &vgpu->gfn_cache.rb_node; 264 while (*link) { 265 parent = *link; 266 itr = rb_entry(parent, struct gvt_dma, gfn_node); 267 268 if (gfn < itr->gfn) 269 link = &parent->rb_left; 270 else 271 link = &parent->rb_right; 272 } 273 rb_link_node(&new->gfn_node, parent, link); 274 rb_insert_color(&new->gfn_node, &vgpu->gfn_cache); 275 276 /* dma_addr_cache maps dma addr to struct gvt_dma. */ 277 parent = NULL; 278 link = &vgpu->dma_addr_cache.rb_node; 279 while (*link) { 280 parent = *link; 281 itr = rb_entry(parent, struct gvt_dma, dma_addr_node); 282 283 if (dma_addr < itr->dma_addr) 284 link = &parent->rb_left; 285 else 286 link = &parent->rb_right; 287 } 288 rb_link_node(&new->dma_addr_node, parent, link); 289 rb_insert_color(&new->dma_addr_node, &vgpu->dma_addr_cache); 290 291 vgpu->nr_cache_entries++; 292 return 0; 293} 294 295static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu, 296 struct gvt_dma *entry) 297{ 298 rb_erase(&entry->gfn_node, &vgpu->gfn_cache); 299 rb_erase(&entry->dma_addr_node, &vgpu->dma_addr_cache); 300 kfree(entry); 301 vgpu->nr_cache_entries--; 302} 303 304static void gvt_cache_destroy(struct intel_vgpu *vgpu) 305{ 306 struct gvt_dma *dma; 307 struct rb_node *node = NULL; 308 309 for (;;) { 310 mutex_lock(&vgpu->cache_lock); 311 node = rb_first(&vgpu->gfn_cache); 312 if (!node) { 313 mutex_unlock(&vgpu->cache_lock); 314 break; 315 } 316 dma = rb_entry(node, struct gvt_dma, gfn_node); 317 gvt_dma_unmap_page(vgpu, dma->gfn, dma->dma_addr, dma->size); 318 __gvt_cache_remove_entry(vgpu, dma); 319 mutex_unlock(&vgpu->cache_lock); 320 } 321} 322 323static void gvt_cache_init(struct intel_vgpu *vgpu) 324{ 325 vgpu->gfn_cache = RB_ROOT; 326 vgpu->dma_addr_cache = RB_ROOT; 327 vgpu->nr_cache_entries = 0; 328 mutex_init(&vgpu->cache_lock); 329} 330 331static void kvmgt_protect_table_init(struct intel_vgpu *info) 332{ 333 hash_init(info->ptable); 334} 335 336static void kvmgt_protect_table_destroy(struct intel_vgpu *info) 337{ 338 struct kvmgt_pgfn *p; 339 struct hlist_node *tmp; 340 int i; 341 342 hash_for_each_safe(info->ptable, i, tmp, p, hnode) { 343 hash_del(&p->hnode); 344 kfree(p); 345 } 346} 347 348static struct kvmgt_pgfn * 349__kvmgt_protect_table_find(struct intel_vgpu *info, gfn_t gfn) 350{ 351 struct kvmgt_pgfn *p, *res = NULL; 352 353 lockdep_assert_held(&info->vgpu_lock); 354 355 hash_for_each_possible(info->ptable, p, hnode, gfn) { 356 if (gfn == p->gfn) { 357 res = p; 358 break; 359 } 360 } 361 362 return res; 363} 364 365static bool kvmgt_gfn_is_write_protected(struct intel_vgpu *info, gfn_t gfn) 366{ 367 struct kvmgt_pgfn *p; 368 369 p = __kvmgt_protect_table_find(info, gfn); 370 return !!p; 371} 372 373static void kvmgt_protect_table_add(struct intel_vgpu *info, gfn_t gfn) 374{ 375 struct kvmgt_pgfn *p; 376 377 if (kvmgt_gfn_is_write_protected(info, gfn)) 378 return; 379 380 p = kzalloc(sizeof(struct kvmgt_pgfn), GFP_ATOMIC); 381 if (WARN(!p, "gfn: 0x%llx\n", gfn)) 382 return; 383 384 p->gfn = gfn; 385 hash_add(info->ptable, &p->hnode, gfn); 386} 387 388static void kvmgt_protect_table_del(struct intel_vgpu *info, gfn_t gfn) 389{ 390 struct kvmgt_pgfn *p; 391 392 p = __kvmgt_protect_table_find(info, gfn); 393 if (p) { 394 hash_del(&p->hnode); 395 kfree(p); 396 } 397} 398 399static size_t intel_vgpu_reg_rw_opregion(struct intel_vgpu *vgpu, char *buf, 400 size_t count, loff_t *ppos, bool iswrite) 401{ 402 unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - 403 VFIO_PCI_NUM_REGIONS; 404 void *base = vgpu->region[i].data; 405 loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; 406 407 408 if (pos >= vgpu->region[i].size || iswrite) { 409 gvt_vgpu_err("invalid op or offset for Intel vgpu OpRegion\n"); 410 return -EINVAL; 411 } 412 count = min(count, (size_t)(vgpu->region[i].size - pos)); 413 memcpy(buf, base + pos, count); 414 415 return count; 416} 417 418static void intel_vgpu_reg_release_opregion(struct intel_vgpu *vgpu, 419 struct vfio_region *region) 420{ 421} 422 423static const struct intel_vgpu_regops intel_vgpu_regops_opregion = { 424 .rw = intel_vgpu_reg_rw_opregion, 425 .release = intel_vgpu_reg_release_opregion, 426}; 427 428static int handle_edid_regs(struct intel_vgpu *vgpu, 429 struct vfio_edid_region *region, char *buf, 430 size_t count, u16 offset, bool is_write) 431{ 432 struct vfio_region_gfx_edid *regs = ®ion->vfio_edid_regs; 433 unsigned int data; 434 435 if (offset + count > sizeof(*regs)) 436 return -EINVAL; 437 438 if (count != 4) 439 return -EINVAL; 440 441 if (is_write) { 442 data = *((unsigned int *)buf); 443 switch (offset) { 444 case offsetof(struct vfio_region_gfx_edid, link_state): 445 if (data == VFIO_DEVICE_GFX_LINK_STATE_UP) { 446 if (!drm_edid_block_valid( 447 (u8 *)region->edid_blob, 448 0, 449 true, 450 NULL)) { 451 gvt_vgpu_err("invalid EDID blob\n"); 452 return -EINVAL; 453 } 454 intel_vgpu_emulate_hotplug(vgpu, true); 455 } else if (data == VFIO_DEVICE_GFX_LINK_STATE_DOWN) 456 intel_vgpu_emulate_hotplug(vgpu, false); 457 else { 458 gvt_vgpu_err("invalid EDID link state %d\n", 459 regs->link_state); 460 return -EINVAL; 461 } 462 regs->link_state = data; 463 break; 464 case offsetof(struct vfio_region_gfx_edid, edid_size): 465 if (data > regs->edid_max_size) { 466 gvt_vgpu_err("EDID size is bigger than %d!\n", 467 regs->edid_max_size); 468 return -EINVAL; 469 } 470 regs->edid_size = data; 471 break; 472 default: 473 /* read-only regs */ 474 gvt_vgpu_err("write read-only EDID region at offset %d\n", 475 offset); 476 return -EPERM; 477 } 478 } else { 479 memcpy(buf, (char *)regs + offset, count); 480 } 481 482 return count; 483} 484 485static int handle_edid_blob(struct vfio_edid_region *region, char *buf, 486 size_t count, u16 offset, bool is_write) 487{ 488 if (offset + count > region->vfio_edid_regs.edid_size) 489 return -EINVAL; 490 491 if (is_write) 492 memcpy(region->edid_blob + offset, buf, count); 493 else 494 memcpy(buf, region->edid_blob + offset, count); 495 496 return count; 497} 498 499static size_t intel_vgpu_reg_rw_edid(struct intel_vgpu *vgpu, char *buf, 500 size_t count, loff_t *ppos, bool iswrite) 501{ 502 int ret; 503 unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - 504 VFIO_PCI_NUM_REGIONS; 505 struct vfio_edid_region *region = vgpu->region[i].data; 506 loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; 507 508 if (pos < region->vfio_edid_regs.edid_offset) { 509 ret = handle_edid_regs(vgpu, region, buf, count, pos, iswrite); 510 } else { 511 pos -= EDID_BLOB_OFFSET; 512 ret = handle_edid_blob(region, buf, count, pos, iswrite); 513 } 514 515 if (ret < 0) 516 gvt_vgpu_err("failed to access EDID region\n"); 517 518 return ret; 519} 520 521static void intel_vgpu_reg_release_edid(struct intel_vgpu *vgpu, 522 struct vfio_region *region) 523{ 524 kfree(region->data); 525} 526 527static const struct intel_vgpu_regops intel_vgpu_regops_edid = { 528 .rw = intel_vgpu_reg_rw_edid, 529 .release = intel_vgpu_reg_release_edid, 530}; 531 532static int intel_vgpu_register_reg(struct intel_vgpu *vgpu, 533 unsigned int type, unsigned int subtype, 534 const struct intel_vgpu_regops *ops, 535 size_t size, u32 flags, void *data) 536{ 537 struct vfio_region *region; 538 539 region = krealloc(vgpu->region, 540 (vgpu->num_regions + 1) * sizeof(*region), 541 GFP_KERNEL); 542 if (!region) 543 return -ENOMEM; 544 545 vgpu->region = region; 546 vgpu->region[vgpu->num_regions].type = type; 547 vgpu->region[vgpu->num_regions].subtype = subtype; 548 vgpu->region[vgpu->num_regions].ops = ops; 549 vgpu->region[vgpu->num_regions].size = size; 550 vgpu->region[vgpu->num_regions].flags = flags; 551 vgpu->region[vgpu->num_regions].data = data; 552 vgpu->num_regions++; 553 return 0; 554} 555 556int intel_gvt_set_opregion(struct intel_vgpu *vgpu) 557{ 558 void *base; 559 int ret; 560 561 /* Each vgpu has its own opregion, although VFIO would create another 562 * one later. This one is used to expose opregion to VFIO. And the 563 * other one created by VFIO later, is used by guest actually. 564 */ 565 base = vgpu_opregion(vgpu)->va; 566 if (!base) 567 return -ENOMEM; 568 569 if (memcmp(base, OPREGION_SIGNATURE, 16)) { 570 memunmap(base); 571 return -EINVAL; 572 } 573 574 ret = intel_vgpu_register_reg(vgpu, 575 PCI_VENDOR_ID_INTEL | VFIO_REGION_TYPE_PCI_VENDOR_TYPE, 576 VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION, 577 &intel_vgpu_regops_opregion, INTEL_GVT_OPREGION_SIZE, 578 VFIO_REGION_INFO_FLAG_READ, base); 579 580 return ret; 581} 582 583int intel_gvt_set_edid(struct intel_vgpu *vgpu, int port_num) 584{ 585 struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num); 586 struct vfio_edid_region *base; 587 int ret; 588 589 base = kzalloc(sizeof(*base), GFP_KERNEL); 590 if (!base) 591 return -ENOMEM; 592 593 /* TODO: Add multi-port and EDID extension block support */ 594 base->vfio_edid_regs.edid_offset = EDID_BLOB_OFFSET; 595 base->vfio_edid_regs.edid_max_size = EDID_SIZE; 596 base->vfio_edid_regs.edid_size = EDID_SIZE; 597 base->vfio_edid_regs.max_xres = vgpu_edid_xres(port->id); 598 base->vfio_edid_regs.max_yres = vgpu_edid_yres(port->id); 599 base->edid_blob = port->edid->edid_block; 600 601 ret = intel_vgpu_register_reg(vgpu, 602 VFIO_REGION_TYPE_GFX, 603 VFIO_REGION_SUBTYPE_GFX_EDID, 604 &intel_vgpu_regops_edid, EDID_SIZE, 605 VFIO_REGION_INFO_FLAG_READ | 606 VFIO_REGION_INFO_FLAG_WRITE | 607 VFIO_REGION_INFO_FLAG_CAPS, base); 608 609 return ret; 610} 611 612static void intel_vgpu_dma_unmap(struct vfio_device *vfio_dev, u64 iova, 613 u64 length) 614{ 615 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 616 struct gvt_dma *entry; 617 u64 iov_pfn = iova >> PAGE_SHIFT; 618 u64 end_iov_pfn = iov_pfn + length / PAGE_SIZE; 619 620 mutex_lock(&vgpu->cache_lock); 621 for (; iov_pfn < end_iov_pfn; iov_pfn++) { 622 entry = __gvt_cache_find_gfn(vgpu, iov_pfn); 623 if (!entry) 624 continue; 625 626 gvt_dma_unmap_page(vgpu, entry->gfn, entry->dma_addr, 627 entry->size); 628 __gvt_cache_remove_entry(vgpu, entry); 629 } 630 mutex_unlock(&vgpu->cache_lock); 631} 632 633static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu) 634{ 635 struct intel_vgpu *itr; 636 int id; 637 bool ret = false; 638 639 mutex_lock(&vgpu->gvt->lock); 640 for_each_active_vgpu(vgpu->gvt, itr, id) { 641 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, itr->status)) 642 continue; 643 644 if (vgpu->vfio_device.kvm == itr->vfio_device.kvm) { 645 ret = true; 646 goto out; 647 } 648 } 649out: 650 mutex_unlock(&vgpu->gvt->lock); 651 return ret; 652} 653 654static int intel_vgpu_open_device(struct vfio_device *vfio_dev) 655{ 656 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 657 int ret; 658 659 if (__kvmgt_vgpu_exist(vgpu)) 660 return -EEXIST; 661 662 vgpu->track_node.track_write = kvmgt_page_track_write; 663 vgpu->track_node.track_remove_region = kvmgt_page_track_remove_region; 664 ret = kvm_page_track_register_notifier(vgpu->vfio_device.kvm, 665 &vgpu->track_node); 666 if (ret) { 667 gvt_vgpu_err("KVM is required to use Intel vGPU\n"); 668 return ret; 669 } 670 671 set_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status); 672 673 debugfs_create_ulong(KVMGT_DEBUGFS_FILENAME, 0444, vgpu->debugfs, 674 &vgpu->nr_cache_entries); 675 676 intel_gvt_activate_vgpu(vgpu); 677 678 return 0; 679} 680 681static void intel_vgpu_release_msi_eventfd_ctx(struct intel_vgpu *vgpu) 682{ 683 struct eventfd_ctx *trigger; 684 685 trigger = vgpu->msi_trigger; 686 if (trigger) { 687 eventfd_ctx_put(trigger); 688 vgpu->msi_trigger = NULL; 689 } 690} 691 692static void intel_vgpu_close_device(struct vfio_device *vfio_dev) 693{ 694 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 695 696 intel_gvt_release_vgpu(vgpu); 697 698 clear_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status); 699 700 debugfs_lookup_and_remove(KVMGT_DEBUGFS_FILENAME, vgpu->debugfs); 701 702 kvm_page_track_unregister_notifier(vgpu->vfio_device.kvm, 703 &vgpu->track_node); 704 705 kvmgt_protect_table_destroy(vgpu); 706 gvt_cache_destroy(vgpu); 707 708 WARN_ON(vgpu->nr_cache_entries); 709 710 vgpu->gfn_cache = RB_ROOT; 711 vgpu->dma_addr_cache = RB_ROOT; 712 713 intel_vgpu_release_msi_eventfd_ctx(vgpu); 714} 715 716static u64 intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar) 717{ 718 u32 start_lo, start_hi; 719 u32 mem_type; 720 721 start_lo = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) & 722 PCI_BASE_ADDRESS_MEM_MASK; 723 mem_type = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) & 724 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 725 726 switch (mem_type) { 727 case PCI_BASE_ADDRESS_MEM_TYPE_64: 728 start_hi = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space 729 + bar + 4)); 730 break; 731 case PCI_BASE_ADDRESS_MEM_TYPE_32: 732 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 733 /* 1M mem BAR treated as 32-bit BAR */ 734 default: 735 /* mem unknown type treated as 32-bit BAR */ 736 start_hi = 0; 737 break; 738 } 739 740 return ((u64)start_hi << 32) | start_lo; 741} 742 743static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, u64 off, 744 void *buf, unsigned int count, bool is_write) 745{ 746 u64 bar_start = intel_vgpu_get_bar_addr(vgpu, bar); 747 int ret; 748 749 if (is_write) 750 ret = intel_vgpu_emulate_mmio_write(vgpu, 751 bar_start + off, buf, count); 752 else 753 ret = intel_vgpu_emulate_mmio_read(vgpu, 754 bar_start + off, buf, count); 755 return ret; 756} 757 758static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, u64 off) 759{ 760 return off >= vgpu_aperture_offset(vgpu) && 761 off < vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu); 762} 763 764static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, u64 off, 765 void *buf, unsigned long count, bool is_write) 766{ 767 void __iomem *aperture_va; 768 769 if (!intel_vgpu_in_aperture(vgpu, off) || 770 !intel_vgpu_in_aperture(vgpu, off + count)) { 771 gvt_vgpu_err("Invalid aperture offset %llu\n", off); 772 return -EINVAL; 773 } 774 775 aperture_va = io_mapping_map_wc(&vgpu->gvt->gt->ggtt->iomap, 776 ALIGN_DOWN(off, PAGE_SIZE), 777 count + offset_in_page(off)); 778 if (!aperture_va) 779 return -EIO; 780 781 if (is_write) 782 memcpy_toio(aperture_va + offset_in_page(off), buf, count); 783 else 784 memcpy_fromio(buf, aperture_va + offset_in_page(off), count); 785 786 io_mapping_unmap(aperture_va); 787 788 return 0; 789} 790 791static ssize_t intel_vgpu_rw(struct intel_vgpu *vgpu, char *buf, 792 size_t count, loff_t *ppos, bool is_write) 793{ 794 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); 795 u64 pos = *ppos & VFIO_PCI_OFFSET_MASK; 796 int ret = -EINVAL; 797 798 799 if (index >= VFIO_PCI_NUM_REGIONS + vgpu->num_regions) { 800 gvt_vgpu_err("invalid index: %u\n", index); 801 return -EINVAL; 802 } 803 804 switch (index) { 805 case VFIO_PCI_CONFIG_REGION_INDEX: 806 if (is_write) 807 ret = intel_vgpu_emulate_cfg_write(vgpu, pos, 808 buf, count); 809 else 810 ret = intel_vgpu_emulate_cfg_read(vgpu, pos, 811 buf, count); 812 break; 813 case VFIO_PCI_BAR0_REGION_INDEX: 814 ret = intel_vgpu_bar_rw(vgpu, PCI_BASE_ADDRESS_0, pos, 815 buf, count, is_write); 816 break; 817 case VFIO_PCI_BAR2_REGION_INDEX: 818 ret = intel_vgpu_aperture_rw(vgpu, pos, buf, count, is_write); 819 break; 820 case VFIO_PCI_BAR1_REGION_INDEX: 821 case VFIO_PCI_BAR3_REGION_INDEX: 822 case VFIO_PCI_BAR4_REGION_INDEX: 823 case VFIO_PCI_BAR5_REGION_INDEX: 824 case VFIO_PCI_VGA_REGION_INDEX: 825 case VFIO_PCI_ROM_REGION_INDEX: 826 break; 827 default: 828 if (index >= VFIO_PCI_NUM_REGIONS + vgpu->num_regions) 829 return -EINVAL; 830 831 index -= VFIO_PCI_NUM_REGIONS; 832 return vgpu->region[index].ops->rw(vgpu, buf, count, 833 ppos, is_write); 834 } 835 836 return ret == 0 ? count : ret; 837} 838 839static bool gtt_entry(struct intel_vgpu *vgpu, loff_t *ppos) 840{ 841 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); 842 struct intel_gvt *gvt = vgpu->gvt; 843 int offset; 844 845 /* Only allow MMIO GGTT entry access */ 846 if (index != PCI_BASE_ADDRESS_0) 847 return false; 848 849 offset = (u64)(*ppos & VFIO_PCI_OFFSET_MASK) - 850 intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0); 851 852 return (offset >= gvt->device_info.gtt_start_offset && 853 offset < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt)) ? 854 true : false; 855} 856 857static ssize_t intel_vgpu_read(struct vfio_device *vfio_dev, char __user *buf, 858 size_t count, loff_t *ppos) 859{ 860 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 861 unsigned int done = 0; 862 int ret; 863 864 while (count) { 865 size_t filled; 866 867 /* Only support GGTT entry 8 bytes read */ 868 if (count >= 8 && !(*ppos % 8) && 869 gtt_entry(vgpu, ppos)) { 870 u64 val; 871 872 ret = intel_vgpu_rw(vgpu, (char *)&val, sizeof(val), 873 ppos, false); 874 if (ret <= 0) 875 goto read_err; 876 877 if (copy_to_user(buf, &val, sizeof(val))) 878 goto read_err; 879 880 filled = 8; 881 } else if (count >= 4 && !(*ppos % 4)) { 882 u32 val; 883 884 ret = intel_vgpu_rw(vgpu, (char *)&val, sizeof(val), 885 ppos, false); 886 if (ret <= 0) 887 goto read_err; 888 889 if (copy_to_user(buf, &val, sizeof(val))) 890 goto read_err; 891 892 filled = 4; 893 } else if (count >= 2 && !(*ppos % 2)) { 894 u16 val; 895 896 ret = intel_vgpu_rw(vgpu, (char *)&val, sizeof(val), 897 ppos, false); 898 if (ret <= 0) 899 goto read_err; 900 901 if (copy_to_user(buf, &val, sizeof(val))) 902 goto read_err; 903 904 filled = 2; 905 } else { 906 u8 val; 907 908 ret = intel_vgpu_rw(vgpu, &val, sizeof(val), ppos, 909 false); 910 if (ret <= 0) 911 goto read_err; 912 913 if (copy_to_user(buf, &val, sizeof(val))) 914 goto read_err; 915 916 filled = 1; 917 } 918 919 count -= filled; 920 done += filled; 921 *ppos += filled; 922 buf += filled; 923 } 924 925 return done; 926 927read_err: 928 return -EFAULT; 929} 930 931static ssize_t intel_vgpu_write(struct vfio_device *vfio_dev, 932 const char __user *buf, 933 size_t count, loff_t *ppos) 934{ 935 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 936 unsigned int done = 0; 937 int ret; 938 939 while (count) { 940 size_t filled; 941 942 /* Only support GGTT entry 8 bytes write */ 943 if (count >= 8 && !(*ppos % 8) && 944 gtt_entry(vgpu, ppos)) { 945 u64 val; 946 947 if (copy_from_user(&val, buf, sizeof(val))) 948 goto write_err; 949 950 ret = intel_vgpu_rw(vgpu, (char *)&val, sizeof(val), 951 ppos, true); 952 if (ret <= 0) 953 goto write_err; 954 955 filled = 8; 956 } else if (count >= 4 && !(*ppos % 4)) { 957 u32 val; 958 959 if (copy_from_user(&val, buf, sizeof(val))) 960 goto write_err; 961 962 ret = intel_vgpu_rw(vgpu, (char *)&val, sizeof(val), 963 ppos, true); 964 if (ret <= 0) 965 goto write_err; 966 967 filled = 4; 968 } else if (count >= 2 && !(*ppos % 2)) { 969 u16 val; 970 971 if (copy_from_user(&val, buf, sizeof(val))) 972 goto write_err; 973 974 ret = intel_vgpu_rw(vgpu, (char *)&val, 975 sizeof(val), ppos, true); 976 if (ret <= 0) 977 goto write_err; 978 979 filled = 2; 980 } else { 981 u8 val; 982 983 if (copy_from_user(&val, buf, sizeof(val))) 984 goto write_err; 985 986 ret = intel_vgpu_rw(vgpu, &val, sizeof(val), 987 ppos, true); 988 if (ret <= 0) 989 goto write_err; 990 991 filled = 1; 992 } 993 994 count -= filled; 995 done += filled; 996 *ppos += filled; 997 buf += filled; 998 } 999 1000 return done; 1001write_err: 1002 return -EFAULT; 1003} 1004 1005static int intel_vgpu_mmap(struct vfio_device *vfio_dev, 1006 struct vm_area_struct *vma) 1007{ 1008 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 1009 unsigned int index; 1010 u64 virtaddr; 1011 unsigned long req_size, pgoff, req_start; 1012 pgprot_t pg_prot; 1013 1014 index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); 1015 if (index >= VFIO_PCI_ROM_REGION_INDEX) 1016 return -EINVAL; 1017 1018 if (vma->vm_end < vma->vm_start) 1019 return -EINVAL; 1020 if ((vma->vm_flags & VM_SHARED) == 0) 1021 return -EINVAL; 1022 if (index != VFIO_PCI_BAR2_REGION_INDEX) 1023 return -EINVAL; 1024 1025 pg_prot = vma->vm_page_prot; 1026 virtaddr = vma->vm_start; 1027 req_size = vma->vm_end - vma->vm_start; 1028 pgoff = vma->vm_pgoff & 1029 ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); 1030 req_start = pgoff << PAGE_SHIFT; 1031 1032 if (!intel_vgpu_in_aperture(vgpu, req_start)) 1033 return -EINVAL; 1034 if (req_start + req_size > 1035 vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu)) 1036 return -EINVAL; 1037 1038 pgoff = (gvt_aperture_pa_base(vgpu->gvt) >> PAGE_SHIFT) + pgoff; 1039 1040 return remap_pfn_range(vma, virtaddr, pgoff, req_size, pg_prot); 1041} 1042 1043static int intel_vgpu_get_irq_count(struct intel_vgpu *vgpu, int type) 1044{ 1045 if (type == VFIO_PCI_INTX_IRQ_INDEX || type == VFIO_PCI_MSI_IRQ_INDEX) 1046 return 1; 1047 1048 return 0; 1049} 1050 1051static int intel_vgpu_set_intx_mask(struct intel_vgpu *vgpu, 1052 unsigned int index, unsigned int start, 1053 unsigned int count, u32 flags, 1054 void *data) 1055{ 1056 return 0; 1057} 1058 1059static int intel_vgpu_set_intx_unmask(struct intel_vgpu *vgpu, 1060 unsigned int index, unsigned int start, 1061 unsigned int count, u32 flags, void *data) 1062{ 1063 return 0; 1064} 1065 1066static int intel_vgpu_set_intx_trigger(struct intel_vgpu *vgpu, 1067 unsigned int index, unsigned int start, unsigned int count, 1068 u32 flags, void *data) 1069{ 1070 return 0; 1071} 1072 1073static int intel_vgpu_set_msi_trigger(struct intel_vgpu *vgpu, 1074 unsigned int index, unsigned int start, unsigned int count, 1075 u32 flags, void *data) 1076{ 1077 struct eventfd_ctx *trigger; 1078 1079 if (flags & VFIO_IRQ_SET_DATA_EVENTFD) { 1080 int fd = *(int *)data; 1081 1082 trigger = eventfd_ctx_fdget(fd); 1083 if (IS_ERR(trigger)) { 1084 gvt_vgpu_err("eventfd_ctx_fdget failed\n"); 1085 return PTR_ERR(trigger); 1086 } 1087 vgpu->msi_trigger = trigger; 1088 } else if ((flags & VFIO_IRQ_SET_DATA_NONE) && !count) 1089 intel_vgpu_release_msi_eventfd_ctx(vgpu); 1090 1091 return 0; 1092} 1093 1094static int intel_vgpu_set_irqs(struct intel_vgpu *vgpu, u32 flags, 1095 unsigned int index, unsigned int start, unsigned int count, 1096 void *data) 1097{ 1098 int (*func)(struct intel_vgpu *vgpu, unsigned int index, 1099 unsigned int start, unsigned int count, u32 flags, 1100 void *data) = NULL; 1101 1102 switch (index) { 1103 case VFIO_PCI_INTX_IRQ_INDEX: 1104 switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { 1105 case VFIO_IRQ_SET_ACTION_MASK: 1106 func = intel_vgpu_set_intx_mask; 1107 break; 1108 case VFIO_IRQ_SET_ACTION_UNMASK: 1109 func = intel_vgpu_set_intx_unmask; 1110 break; 1111 case VFIO_IRQ_SET_ACTION_TRIGGER: 1112 func = intel_vgpu_set_intx_trigger; 1113 break; 1114 } 1115 break; 1116 case VFIO_PCI_MSI_IRQ_INDEX: 1117 switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { 1118 case VFIO_IRQ_SET_ACTION_MASK: 1119 case VFIO_IRQ_SET_ACTION_UNMASK: 1120 /* XXX Need masking support exported */ 1121 break; 1122 case VFIO_IRQ_SET_ACTION_TRIGGER: 1123 func = intel_vgpu_set_msi_trigger; 1124 break; 1125 } 1126 break; 1127 } 1128 1129 if (!func) 1130 return -ENOTTY; 1131 1132 return func(vgpu, index, start, count, flags, data); 1133} 1134 1135static long intel_vgpu_ioctl(struct vfio_device *vfio_dev, unsigned int cmd, 1136 unsigned long arg) 1137{ 1138 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 1139 unsigned long minsz; 1140 1141 gvt_dbg_core("vgpu%d ioctl, cmd: %d\n", vgpu->id, cmd); 1142 1143 if (cmd == VFIO_DEVICE_GET_INFO) { 1144 struct vfio_device_info info; 1145 1146 minsz = offsetofend(struct vfio_device_info, num_irqs); 1147 1148 if (copy_from_user(&info, (void __user *)arg, minsz)) 1149 return -EFAULT; 1150 1151 if (info.argsz < minsz) 1152 return -EINVAL; 1153 1154 info.flags = VFIO_DEVICE_FLAGS_PCI; 1155 info.flags |= VFIO_DEVICE_FLAGS_RESET; 1156 info.num_regions = VFIO_PCI_NUM_REGIONS + 1157 vgpu->num_regions; 1158 info.num_irqs = VFIO_PCI_NUM_IRQS; 1159 1160 return copy_to_user((void __user *)arg, &info, minsz) ? 1161 -EFAULT : 0; 1162 1163 } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) { 1164 struct vfio_region_info info; 1165 struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; 1166 unsigned int i; 1167 int ret; 1168 struct vfio_region_info_cap_sparse_mmap *sparse = NULL; 1169 int nr_areas = 1; 1170 int cap_type_id; 1171 1172 minsz = offsetofend(struct vfio_region_info, offset); 1173 1174 if (copy_from_user(&info, (void __user *)arg, minsz)) 1175 return -EFAULT; 1176 1177 if (info.argsz < minsz) 1178 return -EINVAL; 1179 1180 switch (info.index) { 1181 case VFIO_PCI_CONFIG_REGION_INDEX: 1182 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1183 info.size = vgpu->gvt->device_info.cfg_space_size; 1184 info.flags = VFIO_REGION_INFO_FLAG_READ | 1185 VFIO_REGION_INFO_FLAG_WRITE; 1186 break; 1187 case VFIO_PCI_BAR0_REGION_INDEX: 1188 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1189 info.size = vgpu->cfg_space.bar[info.index].size; 1190 if (!info.size) { 1191 info.flags = 0; 1192 break; 1193 } 1194 1195 info.flags = VFIO_REGION_INFO_FLAG_READ | 1196 VFIO_REGION_INFO_FLAG_WRITE; 1197 break; 1198 case VFIO_PCI_BAR1_REGION_INDEX: 1199 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1200 info.size = 0; 1201 info.flags = 0; 1202 break; 1203 case VFIO_PCI_BAR2_REGION_INDEX: 1204 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1205 info.flags = VFIO_REGION_INFO_FLAG_CAPS | 1206 VFIO_REGION_INFO_FLAG_MMAP | 1207 VFIO_REGION_INFO_FLAG_READ | 1208 VFIO_REGION_INFO_FLAG_WRITE; 1209 info.size = gvt_aperture_sz(vgpu->gvt); 1210 1211 sparse = kzalloc(struct_size(sparse, areas, nr_areas), 1212 GFP_KERNEL); 1213 if (!sparse) 1214 return -ENOMEM; 1215 1216 sparse->header.id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; 1217 sparse->header.version = 1; 1218 sparse->nr_areas = nr_areas; 1219 cap_type_id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; 1220 sparse->areas[0].offset = 1221 PAGE_ALIGN(vgpu_aperture_offset(vgpu)); 1222 sparse->areas[0].size = vgpu_aperture_sz(vgpu); 1223 break; 1224 1225 case VFIO_PCI_BAR3_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: 1226 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1227 info.size = 0; 1228 info.flags = 0; 1229 1230 gvt_dbg_core("get region info bar:%d\n", info.index); 1231 break; 1232 1233 case VFIO_PCI_ROM_REGION_INDEX: 1234 case VFIO_PCI_VGA_REGION_INDEX: 1235 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1236 info.size = 0; 1237 info.flags = 0; 1238 1239 gvt_dbg_core("get region info index:%d\n", info.index); 1240 break; 1241 default: 1242 { 1243 struct vfio_region_info_cap_type cap_type = { 1244 .header.id = VFIO_REGION_INFO_CAP_TYPE, 1245 .header.version = 1 }; 1246 1247 if (info.index >= VFIO_PCI_NUM_REGIONS + 1248 vgpu->num_regions) 1249 return -EINVAL; 1250 info.index = 1251 array_index_nospec(info.index, 1252 VFIO_PCI_NUM_REGIONS + 1253 vgpu->num_regions); 1254 1255 i = info.index - VFIO_PCI_NUM_REGIONS; 1256 1257 info.offset = 1258 VFIO_PCI_INDEX_TO_OFFSET(info.index); 1259 info.size = vgpu->region[i].size; 1260 info.flags = vgpu->region[i].flags; 1261 1262 cap_type.type = vgpu->region[i].type; 1263 cap_type.subtype = vgpu->region[i].subtype; 1264 1265 ret = vfio_info_add_capability(&caps, 1266 &cap_type.header, 1267 sizeof(cap_type)); 1268 if (ret) 1269 return ret; 1270 } 1271 } 1272 1273 if ((info.flags & VFIO_REGION_INFO_FLAG_CAPS) && sparse) { 1274 switch (cap_type_id) { 1275 case VFIO_REGION_INFO_CAP_SPARSE_MMAP: 1276 ret = vfio_info_add_capability(&caps, 1277 &sparse->header, 1278 struct_size(sparse, areas, 1279 sparse->nr_areas)); 1280 if (ret) { 1281 kfree(sparse); 1282 return ret; 1283 } 1284 break; 1285 default: 1286 kfree(sparse); 1287 return -EINVAL; 1288 } 1289 } 1290 1291 if (caps.size) { 1292 info.flags |= VFIO_REGION_INFO_FLAG_CAPS; 1293 if (info.argsz < sizeof(info) + caps.size) { 1294 info.argsz = sizeof(info) + caps.size; 1295 info.cap_offset = 0; 1296 } else { 1297 vfio_info_cap_shift(&caps, sizeof(info)); 1298 if (copy_to_user((void __user *)arg + 1299 sizeof(info), caps.buf, 1300 caps.size)) { 1301 kfree(caps.buf); 1302 kfree(sparse); 1303 return -EFAULT; 1304 } 1305 info.cap_offset = sizeof(info); 1306 } 1307 1308 kfree(caps.buf); 1309 } 1310 1311 kfree(sparse); 1312 return copy_to_user((void __user *)arg, &info, minsz) ? 1313 -EFAULT : 0; 1314 } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) { 1315 struct vfio_irq_info info; 1316 1317 minsz = offsetofend(struct vfio_irq_info, count); 1318 1319 if (copy_from_user(&info, (void __user *)arg, minsz)) 1320 return -EFAULT; 1321 1322 if (info.argsz < minsz || info.index >= VFIO_PCI_NUM_IRQS) 1323 return -EINVAL; 1324 1325 switch (info.index) { 1326 case VFIO_PCI_INTX_IRQ_INDEX: 1327 case VFIO_PCI_MSI_IRQ_INDEX: 1328 break; 1329 default: 1330 return -EINVAL; 1331 } 1332 1333 info.flags = VFIO_IRQ_INFO_EVENTFD; 1334 1335 info.count = intel_vgpu_get_irq_count(vgpu, info.index); 1336 1337 if (info.index == VFIO_PCI_INTX_IRQ_INDEX) 1338 info.flags |= (VFIO_IRQ_INFO_MASKABLE | 1339 VFIO_IRQ_INFO_AUTOMASKED); 1340 else 1341 info.flags |= VFIO_IRQ_INFO_NORESIZE; 1342 1343 return copy_to_user((void __user *)arg, &info, minsz) ? 1344 -EFAULT : 0; 1345 } else if (cmd == VFIO_DEVICE_SET_IRQS) { 1346 struct vfio_irq_set hdr; 1347 u8 *data = NULL; 1348 int ret = 0; 1349 size_t data_size = 0; 1350 1351 minsz = offsetofend(struct vfio_irq_set, count); 1352 1353 if (copy_from_user(&hdr, (void __user *)arg, minsz)) 1354 return -EFAULT; 1355 1356 if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) { 1357 int max = intel_vgpu_get_irq_count(vgpu, hdr.index); 1358 1359 ret = vfio_set_irqs_validate_and_prepare(&hdr, max, 1360 VFIO_PCI_NUM_IRQS, &data_size); 1361 if (ret) { 1362 gvt_vgpu_err("intel:vfio_set_irqs_validate_and_prepare failed\n"); 1363 return -EINVAL; 1364 } 1365 if (data_size) { 1366 data = memdup_user((void __user *)(arg + minsz), 1367 data_size); 1368 if (IS_ERR(data)) 1369 return PTR_ERR(data); 1370 } 1371 } 1372 1373 ret = intel_vgpu_set_irqs(vgpu, hdr.flags, hdr.index, 1374 hdr.start, hdr.count, data); 1375 kfree(data); 1376 1377 return ret; 1378 } else if (cmd == VFIO_DEVICE_RESET) { 1379 intel_gvt_reset_vgpu(vgpu); 1380 return 0; 1381 } else if (cmd == VFIO_DEVICE_QUERY_GFX_PLANE) { 1382 struct vfio_device_gfx_plane_info dmabuf = {}; 1383 int ret = 0; 1384 1385 minsz = offsetofend(struct vfio_device_gfx_plane_info, 1386 dmabuf_id); 1387 if (copy_from_user(&dmabuf, (void __user *)arg, minsz)) 1388 return -EFAULT; 1389 if (dmabuf.argsz < minsz) 1390 return -EINVAL; 1391 1392 ret = intel_vgpu_query_plane(vgpu, &dmabuf); 1393 if (ret != 0) 1394 return ret; 1395 1396 return copy_to_user((void __user *)arg, &dmabuf, minsz) ? 1397 -EFAULT : 0; 1398 } else if (cmd == VFIO_DEVICE_GET_GFX_DMABUF) { 1399 __u32 dmabuf_id; 1400 1401 if (get_user(dmabuf_id, (__u32 __user *)arg)) 1402 return -EFAULT; 1403 return intel_vgpu_get_dmabuf(vgpu, dmabuf_id); 1404 } 1405 1406 return -ENOTTY; 1407} 1408 1409static ssize_t 1410vgpu_id_show(struct device *dev, struct device_attribute *attr, 1411 char *buf) 1412{ 1413 struct intel_vgpu *vgpu = dev_get_drvdata(dev); 1414 1415 return sprintf(buf, "%d\n", vgpu->id); 1416} 1417 1418static DEVICE_ATTR_RO(vgpu_id); 1419 1420static struct attribute *intel_vgpu_attrs[] = { 1421 &dev_attr_vgpu_id.attr, 1422 NULL 1423}; 1424 1425static const struct attribute_group intel_vgpu_group = { 1426 .name = "intel_vgpu", 1427 .attrs = intel_vgpu_attrs, 1428}; 1429 1430static const struct attribute_group *intel_vgpu_groups[] = { 1431 &intel_vgpu_group, 1432 NULL, 1433}; 1434 1435static int intel_vgpu_init_dev(struct vfio_device *vfio_dev) 1436{ 1437 struct mdev_device *mdev = to_mdev_device(vfio_dev->dev); 1438 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 1439 struct intel_vgpu_type *type = 1440 container_of(mdev->type, struct intel_vgpu_type, type); 1441 int ret; 1442 1443 vgpu->gvt = kdev_to_i915(mdev->type->parent->dev)->gvt; 1444 ret = intel_gvt_create_vgpu(vgpu, type->conf); 1445 if (ret) 1446 return ret; 1447 1448 kvmgt_protect_table_init(vgpu); 1449 gvt_cache_init(vgpu); 1450 1451 return 0; 1452} 1453 1454static void intel_vgpu_release_dev(struct vfio_device *vfio_dev) 1455{ 1456 struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev); 1457 1458 intel_gvt_destroy_vgpu(vgpu); 1459} 1460 1461static const struct vfio_device_ops intel_vgpu_dev_ops = { 1462 .init = intel_vgpu_init_dev, 1463 .release = intel_vgpu_release_dev, 1464 .open_device = intel_vgpu_open_device, 1465 .close_device = intel_vgpu_close_device, 1466 .read = intel_vgpu_read, 1467 .write = intel_vgpu_write, 1468 .mmap = intel_vgpu_mmap, 1469 .ioctl = intel_vgpu_ioctl, 1470 .dma_unmap = intel_vgpu_dma_unmap, 1471 .bind_iommufd = vfio_iommufd_emulated_bind, 1472 .unbind_iommufd = vfio_iommufd_emulated_unbind, 1473 .attach_ioas = vfio_iommufd_emulated_attach_ioas, 1474 .detach_ioas = vfio_iommufd_emulated_detach_ioas, 1475}; 1476 1477static int intel_vgpu_probe(struct mdev_device *mdev) 1478{ 1479 struct intel_vgpu *vgpu; 1480 int ret; 1481 1482 vgpu = vfio_alloc_device(intel_vgpu, vfio_device, &mdev->dev, 1483 &intel_vgpu_dev_ops); 1484 if (IS_ERR(vgpu)) { 1485 gvt_err("failed to create intel vgpu: %ld\n", PTR_ERR(vgpu)); 1486 return PTR_ERR(vgpu); 1487 } 1488 1489 dev_set_drvdata(&mdev->dev, vgpu); 1490 ret = vfio_register_emulated_iommu_dev(&vgpu->vfio_device); 1491 if (ret) 1492 goto out_put_vdev; 1493 1494 gvt_dbg_core("intel_vgpu_create succeeded for mdev: %s\n", 1495 dev_name(mdev_dev(mdev))); 1496 return 0; 1497 1498out_put_vdev: 1499 vfio_put_device(&vgpu->vfio_device); 1500 return ret; 1501} 1502 1503static void intel_vgpu_remove(struct mdev_device *mdev) 1504{ 1505 struct intel_vgpu *vgpu = dev_get_drvdata(&mdev->dev); 1506 1507 vfio_unregister_group_dev(&vgpu->vfio_device); 1508 vfio_put_device(&vgpu->vfio_device); 1509} 1510 1511static unsigned int intel_vgpu_get_available(struct mdev_type *mtype) 1512{ 1513 struct intel_vgpu_type *type = 1514 container_of(mtype, struct intel_vgpu_type, type); 1515 struct intel_gvt *gvt = kdev_to_i915(mtype->parent->dev)->gvt; 1516 unsigned int low_gm_avail, high_gm_avail, fence_avail; 1517 1518 mutex_lock(&gvt->lock); 1519 low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE - 1520 gvt->gm.vgpu_allocated_low_gm_size; 1521 high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE - 1522 gvt->gm.vgpu_allocated_high_gm_size; 1523 fence_avail = gvt_fence_sz(gvt) - HOST_FENCE - 1524 gvt->fence.vgpu_allocated_fence_num; 1525 mutex_unlock(&gvt->lock); 1526 1527 return min3(low_gm_avail / type->conf->low_mm, 1528 high_gm_avail / type->conf->high_mm, 1529 fence_avail / type->conf->fence); 1530} 1531 1532static struct mdev_driver intel_vgpu_mdev_driver = { 1533 .device_api = VFIO_DEVICE_API_PCI_STRING, 1534 .driver = { 1535 .name = "intel_vgpu_mdev", 1536 .owner = THIS_MODULE, 1537 .dev_groups = intel_vgpu_groups, 1538 }, 1539 .probe = intel_vgpu_probe, 1540 .remove = intel_vgpu_remove, 1541 .get_available = intel_vgpu_get_available, 1542 .show_description = intel_vgpu_show_description, 1543}; 1544 1545int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn) 1546{ 1547 int r; 1548 1549 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, info->status)) 1550 return -ESRCH; 1551 1552 if (kvmgt_gfn_is_write_protected(info, gfn)) 1553 return 0; 1554 1555 r = kvm_write_track_add_gfn(info->vfio_device.kvm, gfn); 1556 if (r) 1557 return r; 1558 1559 kvmgt_protect_table_add(info, gfn); 1560 return 0; 1561} 1562 1563int intel_gvt_page_track_remove(struct intel_vgpu *info, u64 gfn) 1564{ 1565 int r; 1566 1567 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, info->status)) 1568 return -ESRCH; 1569 1570 if (!kvmgt_gfn_is_write_protected(info, gfn)) 1571 return 0; 1572 1573 r = kvm_write_track_remove_gfn(info->vfio_device.kvm, gfn); 1574 if (r) 1575 return r; 1576 1577 kvmgt_protect_table_del(info, gfn); 1578 return 0; 1579} 1580 1581static void kvmgt_page_track_write(gpa_t gpa, const u8 *val, int len, 1582 struct kvm_page_track_notifier_node *node) 1583{ 1584 struct intel_vgpu *info = 1585 container_of(node, struct intel_vgpu, track_node); 1586 1587 mutex_lock(&info->vgpu_lock); 1588 1589 if (kvmgt_gfn_is_write_protected(info, gpa >> PAGE_SHIFT)) 1590 intel_vgpu_page_track_handler(info, gpa, 1591 (void *)val, len); 1592 1593 mutex_unlock(&info->vgpu_lock); 1594} 1595 1596static void kvmgt_page_track_remove_region(gfn_t gfn, unsigned long nr_pages, 1597 struct kvm_page_track_notifier_node *node) 1598{ 1599 unsigned long i; 1600 struct intel_vgpu *info = 1601 container_of(node, struct intel_vgpu, track_node); 1602 1603 mutex_lock(&info->vgpu_lock); 1604 1605 for (i = 0; i < nr_pages; i++) { 1606 if (kvmgt_gfn_is_write_protected(info, gfn + i)) 1607 kvmgt_protect_table_del(info, gfn + i); 1608 } 1609 1610 mutex_unlock(&info->vgpu_lock); 1611} 1612 1613void intel_vgpu_detach_regions(struct intel_vgpu *vgpu) 1614{ 1615 int i; 1616 1617 if (!vgpu->region) 1618 return; 1619 1620 for (i = 0; i < vgpu->num_regions; i++) 1621 if (vgpu->region[i].ops->release) 1622 vgpu->region[i].ops->release(vgpu, 1623 &vgpu->region[i]); 1624 vgpu->num_regions = 0; 1625 kfree(vgpu->region); 1626 vgpu->region = NULL; 1627} 1628 1629int intel_gvt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, 1630 unsigned long size, dma_addr_t *dma_addr) 1631{ 1632 struct gvt_dma *entry; 1633 int ret; 1634 1635 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status)) 1636 return -EINVAL; 1637 1638 mutex_lock(&vgpu->cache_lock); 1639 1640 entry = __gvt_cache_find_gfn(vgpu, gfn); 1641 if (!entry) { 1642 ret = gvt_dma_map_page(vgpu, gfn, dma_addr, size); 1643 if (ret) 1644 goto err_unlock; 1645 1646 ret = __gvt_cache_add(vgpu, gfn, *dma_addr, size); 1647 if (ret) 1648 goto err_unmap; 1649 } else if (entry->size != size) { 1650 /* the same gfn with different size: unmap and re-map */ 1651 gvt_dma_unmap_page(vgpu, gfn, entry->dma_addr, entry->size); 1652 __gvt_cache_remove_entry(vgpu, entry); 1653 1654 ret = gvt_dma_map_page(vgpu, gfn, dma_addr, size); 1655 if (ret) 1656 goto err_unlock; 1657 1658 ret = __gvt_cache_add(vgpu, gfn, *dma_addr, size); 1659 if (ret) 1660 goto err_unmap; 1661 } else { 1662 kref_get(&entry->ref); 1663 *dma_addr = entry->dma_addr; 1664 } 1665 1666 mutex_unlock(&vgpu->cache_lock); 1667 return 0; 1668 1669err_unmap: 1670 gvt_dma_unmap_page(vgpu, gfn, *dma_addr, size); 1671err_unlock: 1672 mutex_unlock(&vgpu->cache_lock); 1673 return ret; 1674} 1675 1676int intel_gvt_dma_pin_guest_page(struct intel_vgpu *vgpu, dma_addr_t dma_addr) 1677{ 1678 struct gvt_dma *entry; 1679 int ret = 0; 1680 1681 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status)) 1682 return -EINVAL; 1683 1684 mutex_lock(&vgpu->cache_lock); 1685 entry = __gvt_cache_find_dma_addr(vgpu, dma_addr); 1686 if (entry) 1687 kref_get(&entry->ref); 1688 else 1689 ret = -ENOMEM; 1690 mutex_unlock(&vgpu->cache_lock); 1691 1692 return ret; 1693} 1694 1695static void __gvt_dma_release(struct kref *ref) 1696{ 1697 struct gvt_dma *entry = container_of(ref, typeof(*entry), ref); 1698 1699 gvt_dma_unmap_page(entry->vgpu, entry->gfn, entry->dma_addr, 1700 entry->size); 1701 __gvt_cache_remove_entry(entry->vgpu, entry); 1702} 1703 1704void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu, 1705 dma_addr_t dma_addr) 1706{ 1707 struct gvt_dma *entry; 1708 1709 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status)) 1710 return; 1711 1712 mutex_lock(&vgpu->cache_lock); 1713 entry = __gvt_cache_find_dma_addr(vgpu, dma_addr); 1714 if (entry) 1715 kref_put(&entry->ref, __gvt_dma_release); 1716 mutex_unlock(&vgpu->cache_lock); 1717} 1718 1719static void init_device_info(struct intel_gvt *gvt) 1720{ 1721 struct intel_gvt_device_info *info = &gvt->device_info; 1722 struct pci_dev *pdev = to_pci_dev(gvt->gt->i915->drm.dev); 1723 1724 info->max_support_vgpus = 8; 1725 info->cfg_space_size = PCI_CFG_SPACE_EXP_SIZE; 1726 info->mmio_size = 2 * 1024 * 1024; 1727 info->mmio_bar = 0; 1728 info->gtt_start_offset = 8 * 1024 * 1024; 1729 info->gtt_entry_size = 8; 1730 info->gtt_entry_size_shift = 3; 1731 info->gmadr_bytes_in_cmd = 8; 1732 info->max_surface_size = 36 * 1024 * 1024; 1733 info->msi_cap_offset = pdev->msi_cap; 1734} 1735 1736static void intel_gvt_test_and_emulate_vblank(struct intel_gvt *gvt) 1737{ 1738 struct intel_vgpu *vgpu; 1739 int id; 1740 1741 mutex_lock(&gvt->lock); 1742 idr_for_each_entry((&(gvt)->vgpu_idr), (vgpu), (id)) { 1743 if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK + id, 1744 (void *)&gvt->service_request)) { 1745 if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status)) 1746 intel_vgpu_emulate_vblank(vgpu); 1747 } 1748 } 1749 mutex_unlock(&gvt->lock); 1750} 1751 1752static int gvt_service_thread(void *data) 1753{ 1754 struct intel_gvt *gvt = (struct intel_gvt *)data; 1755 int ret; 1756 1757 gvt_dbg_core("service thread start\n"); 1758 1759 while (!kthread_should_stop()) { 1760 ret = wait_event_interruptible(gvt->service_thread_wq, 1761 kthread_should_stop() || gvt->service_request); 1762 1763 if (kthread_should_stop()) 1764 break; 1765 1766 if (WARN_ONCE(ret, "service thread is waken up by signal.\n")) 1767 continue; 1768 1769 intel_gvt_test_and_emulate_vblank(gvt); 1770 1771 if (test_bit(INTEL_GVT_REQUEST_SCHED, 1772 (void *)&gvt->service_request) || 1773 test_bit(INTEL_GVT_REQUEST_EVENT_SCHED, 1774 (void *)&gvt->service_request)) { 1775 intel_gvt_schedule(gvt); 1776 } 1777 } 1778 1779 return 0; 1780} 1781 1782static void clean_service_thread(struct intel_gvt *gvt) 1783{ 1784 kthread_stop(gvt->service_thread); 1785} 1786 1787static int init_service_thread(struct intel_gvt *gvt) 1788{ 1789 init_waitqueue_head(&gvt->service_thread_wq); 1790 1791 gvt->service_thread = kthread_run(gvt_service_thread, 1792 gvt, "gvt_service_thread"); 1793 if (IS_ERR(gvt->service_thread)) { 1794 gvt_err("fail to start service thread.\n"); 1795 return PTR_ERR(gvt->service_thread); 1796 } 1797 return 0; 1798} 1799 1800/** 1801 * intel_gvt_clean_device - clean a GVT device 1802 * @i915: i915 private 1803 * 1804 * This function is called at the driver unloading stage, to free the 1805 * resources owned by a GVT device. 1806 * 1807 */ 1808static void intel_gvt_clean_device(struct drm_i915_private *i915) 1809{ 1810 struct intel_gvt *gvt = fetch_and_zero(&i915->gvt); 1811 1812 if (drm_WARN_ON(&i915->drm, !gvt)) 1813 return; 1814 1815 mdev_unregister_parent(&gvt->parent); 1816 intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu); 1817 intel_gvt_clean_vgpu_types(gvt); 1818 1819 intel_gvt_debugfs_clean(gvt); 1820 clean_service_thread(gvt); 1821 intel_gvt_clean_cmd_parser(gvt); 1822 intel_gvt_clean_sched_policy(gvt); 1823 intel_gvt_clean_workload_scheduler(gvt); 1824 intel_gvt_clean_gtt(gvt); 1825 intel_gvt_free_firmware(gvt); 1826 intel_gvt_clean_mmio_info(gvt); 1827 idr_destroy(&gvt->vgpu_idr); 1828 1829 kfree(i915->gvt); 1830} 1831 1832/** 1833 * intel_gvt_init_device - initialize a GVT device 1834 * @i915: drm i915 private data 1835 * 1836 * This function is called at the initialization stage, to initialize 1837 * necessary GVT components. 1838 * 1839 * Returns: 1840 * Zero on success, negative error code if failed. 1841 * 1842 */ 1843static int intel_gvt_init_device(struct drm_i915_private *i915) 1844{ 1845 struct intel_gvt *gvt; 1846 struct intel_vgpu *vgpu; 1847 int ret; 1848 1849 if (drm_WARN_ON(&i915->drm, i915->gvt)) 1850 return -EEXIST; 1851 1852 gvt = kzalloc(sizeof(struct intel_gvt), GFP_KERNEL); 1853 if (!gvt) 1854 return -ENOMEM; 1855 1856 gvt_dbg_core("init gvt device\n"); 1857 1858 idr_init_base(&gvt->vgpu_idr, 1); 1859 spin_lock_init(&gvt->scheduler.mmio_context_lock); 1860 mutex_init(&gvt->lock); 1861 mutex_init(&gvt->sched_lock); 1862 gvt->gt = to_gt(i915); 1863 i915->gvt = gvt; 1864 1865 init_device_info(gvt); 1866 1867 ret = intel_gvt_setup_mmio_info(gvt); 1868 if (ret) 1869 goto out_clean_idr; 1870 1871 intel_gvt_init_engine_mmio_context(gvt); 1872 1873 ret = intel_gvt_load_firmware(gvt); 1874 if (ret) 1875 goto out_clean_mmio_info; 1876 1877 ret = intel_gvt_init_irq(gvt); 1878 if (ret) 1879 goto out_free_firmware; 1880 1881 ret = intel_gvt_init_gtt(gvt); 1882 if (ret) 1883 goto out_free_firmware; 1884 1885 ret = intel_gvt_init_workload_scheduler(gvt); 1886 if (ret) 1887 goto out_clean_gtt; 1888 1889 ret = intel_gvt_init_sched_policy(gvt); 1890 if (ret) 1891 goto out_clean_workload_scheduler; 1892 1893 ret = intel_gvt_init_cmd_parser(gvt); 1894 if (ret) 1895 goto out_clean_sched_policy; 1896 1897 ret = init_service_thread(gvt); 1898 if (ret) 1899 goto out_clean_cmd_parser; 1900 1901 ret = intel_gvt_init_vgpu_types(gvt); 1902 if (ret) 1903 goto out_clean_thread; 1904 1905 vgpu = intel_gvt_create_idle_vgpu(gvt); 1906 if (IS_ERR(vgpu)) { 1907 ret = PTR_ERR(vgpu); 1908 gvt_err("failed to create idle vgpu\n"); 1909 goto out_clean_types; 1910 } 1911 gvt->idle_vgpu = vgpu; 1912 1913 intel_gvt_debugfs_init(gvt); 1914 1915 ret = mdev_register_parent(&gvt->parent, i915->drm.dev, 1916 &intel_vgpu_mdev_driver, 1917 gvt->mdev_types, gvt->num_types); 1918 if (ret) 1919 goto out_destroy_idle_vgpu; 1920 1921 gvt_dbg_core("gvt device initialization is done\n"); 1922 return 0; 1923 1924out_destroy_idle_vgpu: 1925 intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu); 1926 intel_gvt_debugfs_clean(gvt); 1927out_clean_types: 1928 intel_gvt_clean_vgpu_types(gvt); 1929out_clean_thread: 1930 clean_service_thread(gvt); 1931out_clean_cmd_parser: 1932 intel_gvt_clean_cmd_parser(gvt); 1933out_clean_sched_policy: 1934 intel_gvt_clean_sched_policy(gvt); 1935out_clean_workload_scheduler: 1936 intel_gvt_clean_workload_scheduler(gvt); 1937out_clean_gtt: 1938 intel_gvt_clean_gtt(gvt); 1939out_free_firmware: 1940 intel_gvt_free_firmware(gvt); 1941out_clean_mmio_info: 1942 intel_gvt_clean_mmio_info(gvt); 1943out_clean_idr: 1944 idr_destroy(&gvt->vgpu_idr); 1945 kfree(gvt); 1946 i915->gvt = NULL; 1947 return ret; 1948} 1949 1950static void intel_gvt_pm_resume(struct drm_i915_private *i915) 1951{ 1952 struct intel_gvt *gvt = i915->gvt; 1953 1954 intel_gvt_restore_fence(gvt); 1955 intel_gvt_restore_mmio(gvt); 1956 intel_gvt_restore_ggtt(gvt); 1957} 1958 1959static const struct intel_vgpu_ops intel_gvt_vgpu_ops = { 1960 .init_device = intel_gvt_init_device, 1961 .clean_device = intel_gvt_clean_device, 1962 .pm_resume = intel_gvt_pm_resume, 1963}; 1964 1965static int __init kvmgt_init(void) 1966{ 1967 int ret; 1968 1969 ret = intel_gvt_set_ops(&intel_gvt_vgpu_ops); 1970 if (ret) 1971 return ret; 1972 1973 ret = mdev_register_driver(&intel_vgpu_mdev_driver); 1974 if (ret) 1975 intel_gvt_clear_ops(&intel_gvt_vgpu_ops); 1976 return ret; 1977} 1978 1979static void __exit kvmgt_exit(void) 1980{ 1981 mdev_unregister_driver(&intel_vgpu_mdev_driver); 1982 intel_gvt_clear_ops(&intel_gvt_vgpu_ops); 1983} 1984 1985module_init(kvmgt_init); 1986module_exit(kvmgt_exit); 1987 1988MODULE_LICENSE("GPL and additional rights"); 1989MODULE_AUTHOR("Intel Corporation"); 1990