2 * KVMGT - the implementation of Intel mediated pass-through framework for KVM
4 * Copyright(c) 2014-2016 Intel Corporation. All rights reserved.
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:
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
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
26 * Kevin Tian <kevin.tian@intel.com>
27 * Jike Song <jike.song@intel.com>
28 * Xiaoguang Chen <xiaoguang.chen@intel.com>
31 #include <linux/init.h>
32 #include <linux/device.h>
34 #include <linux/mmu_context.h>
35 #include <linux/types.h>
36 #include <linux/list.h>
37 #include <linux/rbtree.h>
38 #include <linux/spinlock.h>
39 #include <linux/eventfd.h>
40 #include <linux/uuid.h>
41 #include <linux/kvm_host.h>
42 #include <linux/vfio.h>
43 #include <linux/mdev.h>
44 #include <linux/debugfs.h>
49 static const struct intel_gvt_ops *intel_gvt_ops;
51 /* helper macros copied from vfio-pci */
52 #define VFIO_PCI_OFFSET_SHIFT 40
53 #define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
54 #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
55 #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
57 #define OPREGION_SIGNATURE "IntelGraphicsMem"
60 struct intel_vgpu_regops {
61 size_t (*rw)(struct intel_vgpu *vgpu, char *buf,
62 size_t count, loff_t *ppos, bool iswrite);
63 void (*release)(struct intel_vgpu *vgpu,
64 struct vfio_region *region);
72 const struct intel_vgpu_regops *ops;
78 struct hlist_node hnode;
81 struct kvmgt_guest_info {
83 struct intel_vgpu *vgpu;
84 struct kvm_page_track_notifier_node track_node;
85 #define NR_BKT (1 << 18)
86 struct hlist_head ptable[NR_BKT];
88 struct dentry *debugfs_cache_entries;
92 struct intel_vgpu *vgpu;
93 struct rb_node gfn_node;
94 struct rb_node dma_addr_node;
101 static inline bool handle_valid(unsigned long handle)
103 return !!(handle & ~0xff);
106 static int kvmgt_guest_init(struct mdev_device *mdev);
107 static void intel_vgpu_release_work(struct work_struct *work);
108 static bool kvmgt_guest_exit(struct kvmgt_guest_info *info);
110 static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
117 total_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE;
119 for (npage = 0; npage < total_pages; npage++) {
120 unsigned long cur_gfn = gfn + npage;
122 ret = vfio_unpin_pages(mdev_dev(vgpu->vdev.mdev), &cur_gfn, 1);
127 /* Pin a normal or compound guest page for dma. */
128 static int gvt_pin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
129 unsigned long size, struct page **page)
131 unsigned long base_pfn = 0;
136 total_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE;
138 * We pin the pages one-by-one to avoid allocating a big arrary
139 * on stack to hold pfns.
141 for (npage = 0; npage < total_pages; npage++) {
142 unsigned long cur_gfn = gfn + npage;
145 ret = vfio_pin_pages(mdev_dev(vgpu->vdev.mdev), &cur_gfn, 1,
146 IOMMU_READ | IOMMU_WRITE, &pfn);
148 gvt_vgpu_err("vfio_pin_pages failed for gfn 0x%lx, ret %d\n",
153 if (!pfn_valid(pfn)) {
154 gvt_vgpu_err("pfn 0x%lx is not mem backed\n", pfn);
162 else if (base_pfn + npage != pfn) {
163 gvt_vgpu_err("The pages are not continuous\n");
170 *page = pfn_to_page(base_pfn);
173 gvt_unpin_guest_page(vgpu, gfn, npage * PAGE_SIZE);
177 static int gvt_dma_map_page(struct intel_vgpu *vgpu, unsigned long gfn,
178 dma_addr_t *dma_addr, unsigned long size)
180 struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev;
181 struct page *page = NULL;
184 ret = gvt_pin_guest_page(vgpu, gfn, size, &page);
188 /* Setup DMA mapping. */
189 *dma_addr = dma_map_page(dev, page, 0, size, PCI_DMA_BIDIRECTIONAL);
190 ret = dma_mapping_error(dev, *dma_addr);
192 gvt_vgpu_err("DMA mapping failed for pfn 0x%lx, ret %d\n",
193 page_to_pfn(page), ret);
194 gvt_unpin_guest_page(vgpu, gfn, size);
200 static void gvt_dma_unmap_page(struct intel_vgpu *vgpu, unsigned long gfn,
201 dma_addr_t dma_addr, unsigned long size)
203 struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev;
205 dma_unmap_page(dev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
206 gvt_unpin_guest_page(vgpu, gfn, size);
209 static struct gvt_dma *__gvt_cache_find_dma_addr(struct intel_vgpu *vgpu,
212 struct rb_node *node = vgpu->vdev.dma_addr_cache.rb_node;
216 itr = rb_entry(node, struct gvt_dma, dma_addr_node);
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;
228 static struct gvt_dma *__gvt_cache_find_gfn(struct intel_vgpu *vgpu, gfn_t gfn)
230 struct rb_node *node = vgpu->vdev.gfn_cache.rb_node;
234 itr = rb_entry(node, struct gvt_dma, gfn_node);
237 node = node->rb_left;
238 else if (gfn > itr->gfn)
239 node = node->rb_right;
246 static int __gvt_cache_add(struct intel_vgpu *vgpu, gfn_t gfn,
247 dma_addr_t dma_addr, unsigned long size)
249 struct gvt_dma *new, *itr;
250 struct rb_node **link, *parent = NULL;
252 new = kzalloc(sizeof(struct gvt_dma), GFP_KERNEL);
258 new->dma_addr = dma_addr;
260 kref_init(&new->ref);
262 /* gfn_cache maps gfn to struct gvt_dma. */
263 link = &vgpu->vdev.gfn_cache.rb_node;
266 itr = rb_entry(parent, struct gvt_dma, gfn_node);
269 link = &parent->rb_left;
271 link = &parent->rb_right;
273 rb_link_node(&new->gfn_node, parent, link);
274 rb_insert_color(&new->gfn_node, &vgpu->vdev.gfn_cache);
276 /* dma_addr_cache maps dma addr to struct gvt_dma. */
278 link = &vgpu->vdev.dma_addr_cache.rb_node;
281 itr = rb_entry(parent, struct gvt_dma, dma_addr_node);
283 if (dma_addr < itr->dma_addr)
284 link = &parent->rb_left;
286 link = &parent->rb_right;
288 rb_link_node(&new->dma_addr_node, parent, link);
289 rb_insert_color(&new->dma_addr_node, &vgpu->vdev.dma_addr_cache);
291 vgpu->vdev.nr_cache_entries++;
295 static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu,
296 struct gvt_dma *entry)
298 rb_erase(&entry->gfn_node, &vgpu->vdev.gfn_cache);
299 rb_erase(&entry->dma_addr_node, &vgpu->vdev.dma_addr_cache);
301 vgpu->vdev.nr_cache_entries--;
304 static void gvt_cache_destroy(struct intel_vgpu *vgpu)
307 struct rb_node *node = NULL;
310 mutex_lock(&vgpu->vdev.cache_lock);
311 node = rb_first(&vgpu->vdev.gfn_cache);
313 mutex_unlock(&vgpu->vdev.cache_lock);
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->vdev.cache_lock);
323 static void gvt_cache_init(struct intel_vgpu *vgpu)
325 vgpu->vdev.gfn_cache = RB_ROOT;
326 vgpu->vdev.dma_addr_cache = RB_ROOT;
327 vgpu->vdev.nr_cache_entries = 0;
328 mutex_init(&vgpu->vdev.cache_lock);
331 static void kvmgt_protect_table_init(struct kvmgt_guest_info *info)
333 hash_init(info->ptable);
336 static void kvmgt_protect_table_destroy(struct kvmgt_guest_info *info)
338 struct kvmgt_pgfn *p;
339 struct hlist_node *tmp;
342 hash_for_each_safe(info->ptable, i, tmp, p, hnode) {
348 static struct kvmgt_pgfn *
349 __kvmgt_protect_table_find(struct kvmgt_guest_info *info, gfn_t gfn)
351 struct kvmgt_pgfn *p, *res = NULL;
353 hash_for_each_possible(info->ptable, p, hnode, gfn) {
363 static bool kvmgt_gfn_is_write_protected(struct kvmgt_guest_info *info,
366 struct kvmgt_pgfn *p;
368 p = __kvmgt_protect_table_find(info, gfn);
372 static void kvmgt_protect_table_add(struct kvmgt_guest_info *info, gfn_t gfn)
374 struct kvmgt_pgfn *p;
376 if (kvmgt_gfn_is_write_protected(info, gfn))
379 p = kzalloc(sizeof(struct kvmgt_pgfn), GFP_ATOMIC);
380 if (WARN(!p, "gfn: 0x%llx\n", gfn))
384 hash_add(info->ptable, &p->hnode, gfn);
387 static void kvmgt_protect_table_del(struct kvmgt_guest_info *info,
390 struct kvmgt_pgfn *p;
392 p = __kvmgt_protect_table_find(info, gfn);
399 static size_t intel_vgpu_reg_rw_opregion(struct intel_vgpu *vgpu, char *buf,
400 size_t count, loff_t *ppos, bool iswrite)
402 unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) -
403 VFIO_PCI_NUM_REGIONS;
404 void *base = vgpu->vdev.region[i].data;
405 loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK;
407 if (pos >= vgpu->vdev.region[i].size || iswrite) {
408 gvt_vgpu_err("invalid op or offset for Intel vgpu OpRegion\n");
411 count = min(count, (size_t)(vgpu->vdev.region[i].size - pos));
412 memcpy(buf, base + pos, count);
417 static void intel_vgpu_reg_release_opregion(struct intel_vgpu *vgpu,
418 struct vfio_region *region)
422 static const struct intel_vgpu_regops intel_vgpu_regops_opregion = {
423 .rw = intel_vgpu_reg_rw_opregion,
424 .release = intel_vgpu_reg_release_opregion,
427 static int intel_vgpu_register_reg(struct intel_vgpu *vgpu,
428 unsigned int type, unsigned int subtype,
429 const struct intel_vgpu_regops *ops,
430 size_t size, u32 flags, void *data)
432 struct vfio_region *region;
434 region = krealloc(vgpu->vdev.region,
435 (vgpu->vdev.num_regions + 1) * sizeof(*region),
440 vgpu->vdev.region = region;
441 vgpu->vdev.region[vgpu->vdev.num_regions].type = type;
442 vgpu->vdev.region[vgpu->vdev.num_regions].subtype = subtype;
443 vgpu->vdev.region[vgpu->vdev.num_regions].ops = ops;
444 vgpu->vdev.region[vgpu->vdev.num_regions].size = size;
445 vgpu->vdev.region[vgpu->vdev.num_regions].flags = flags;
446 vgpu->vdev.region[vgpu->vdev.num_regions].data = data;
447 vgpu->vdev.num_regions++;
451 static int kvmgt_get_vfio_device(void *p_vgpu)
453 struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu;
455 vgpu->vdev.vfio_device = vfio_device_get_from_dev(
456 mdev_dev(vgpu->vdev.mdev));
457 if (!vgpu->vdev.vfio_device) {
458 gvt_vgpu_err("failed to get vfio device\n");
465 static int kvmgt_set_opregion(void *p_vgpu)
467 struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu;
471 /* Each vgpu has its own opregion, although VFIO would create another
472 * one later. This one is used to expose opregion to VFIO. And the
473 * other one created by VFIO later, is used by guest actually.
475 base = vgpu_opregion(vgpu)->va;
479 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
484 ret = intel_vgpu_register_reg(vgpu,
485 PCI_VENDOR_ID_INTEL | VFIO_REGION_TYPE_PCI_VENDOR_TYPE,
486 VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION,
487 &intel_vgpu_regops_opregion, OPREGION_SIZE,
488 VFIO_REGION_INFO_FLAG_READ, base);
493 static void kvmgt_put_vfio_device(void *vgpu)
495 if (WARN_ON(!((struct intel_vgpu *)vgpu)->vdev.vfio_device))
498 vfio_device_put(((struct intel_vgpu *)vgpu)->vdev.vfio_device);
501 static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev)
503 struct intel_vgpu *vgpu = NULL;
504 struct intel_vgpu_type *type;
509 pdev = mdev_parent_dev(mdev);
510 gvt = kdev_to_i915(pdev)->gvt;
512 type = intel_gvt_ops->gvt_find_vgpu_type(gvt, kobject_name(kobj));
514 gvt_vgpu_err("failed to find type %s to create\n",
520 vgpu = intel_gvt_ops->vgpu_create(gvt, type);
521 if (IS_ERR_OR_NULL(vgpu)) {
522 ret = vgpu == NULL ? -EFAULT : PTR_ERR(vgpu);
523 gvt_err("failed to create intel vgpu: %d\n", ret);
527 INIT_WORK(&vgpu->vdev.release_work, intel_vgpu_release_work);
529 vgpu->vdev.mdev = mdev;
530 mdev_set_drvdata(mdev, vgpu);
532 gvt_dbg_core("intel_vgpu_create succeeded for mdev: %s\n",
533 dev_name(mdev_dev(mdev)));
540 static int intel_vgpu_remove(struct mdev_device *mdev)
542 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
544 if (handle_valid(vgpu->handle))
547 intel_gvt_ops->vgpu_destroy(vgpu);
551 static int intel_vgpu_iommu_notifier(struct notifier_block *nb,
552 unsigned long action, void *data)
554 struct intel_vgpu *vgpu = container_of(nb,
556 vdev.iommu_notifier);
558 if (action == VFIO_IOMMU_NOTIFY_DMA_UNMAP) {
559 struct vfio_iommu_type1_dma_unmap *unmap = data;
560 struct gvt_dma *entry;
561 unsigned long iov_pfn, end_iov_pfn;
563 iov_pfn = unmap->iova >> PAGE_SHIFT;
564 end_iov_pfn = iov_pfn + unmap->size / PAGE_SIZE;
566 mutex_lock(&vgpu->vdev.cache_lock);
567 for (; iov_pfn < end_iov_pfn; iov_pfn++) {
568 entry = __gvt_cache_find_gfn(vgpu, iov_pfn);
572 gvt_dma_unmap_page(vgpu, entry->gfn, entry->dma_addr,
574 __gvt_cache_remove_entry(vgpu, entry);
576 mutex_unlock(&vgpu->vdev.cache_lock);
582 static int intel_vgpu_group_notifier(struct notifier_block *nb,
583 unsigned long action, void *data)
585 struct intel_vgpu *vgpu = container_of(nb,
587 vdev.group_notifier);
589 /* the only action we care about */
590 if (action == VFIO_GROUP_NOTIFY_SET_KVM) {
591 vgpu->vdev.kvm = data;
594 schedule_work(&vgpu->vdev.release_work);
600 static int intel_vgpu_open(struct mdev_device *mdev)
602 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
603 unsigned long events;
606 vgpu->vdev.iommu_notifier.notifier_call = intel_vgpu_iommu_notifier;
607 vgpu->vdev.group_notifier.notifier_call = intel_vgpu_group_notifier;
609 events = VFIO_IOMMU_NOTIFY_DMA_UNMAP;
610 ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, &events,
611 &vgpu->vdev.iommu_notifier);
613 gvt_vgpu_err("vfio_register_notifier for iommu failed: %d\n",
618 events = VFIO_GROUP_NOTIFY_SET_KVM;
619 ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &events,
620 &vgpu->vdev.group_notifier);
622 gvt_vgpu_err("vfio_register_notifier for group failed: %d\n",
627 ret = kvmgt_guest_init(mdev);
631 intel_gvt_ops->vgpu_activate(vgpu);
633 atomic_set(&vgpu->vdev.released, 0);
637 vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY,
638 &vgpu->vdev.group_notifier);
641 vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
642 &vgpu->vdev.iommu_notifier);
647 static void intel_vgpu_release_msi_eventfd_ctx(struct intel_vgpu *vgpu)
649 struct eventfd_ctx *trigger;
651 trigger = vgpu->vdev.msi_trigger;
653 eventfd_ctx_put(trigger);
654 vgpu->vdev.msi_trigger = NULL;
658 static void __intel_vgpu_release(struct intel_vgpu *vgpu)
660 struct kvmgt_guest_info *info;
663 if (!handle_valid(vgpu->handle))
666 if (atomic_cmpxchg(&vgpu->vdev.released, 0, 1))
669 intel_gvt_ops->vgpu_deactivate(vgpu);
671 ret = vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_IOMMU_NOTIFY,
672 &vgpu->vdev.iommu_notifier);
673 WARN(ret, "vfio_unregister_notifier for iommu failed: %d\n", ret);
675 ret = vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_GROUP_NOTIFY,
676 &vgpu->vdev.group_notifier);
677 WARN(ret, "vfio_unregister_notifier for group failed: %d\n", ret);
679 info = (struct kvmgt_guest_info *)vgpu->handle;
680 kvmgt_guest_exit(info);
682 intel_vgpu_release_msi_eventfd_ctx(vgpu);
684 vgpu->vdev.kvm = NULL;
688 static void intel_vgpu_release(struct mdev_device *mdev)
690 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
692 __intel_vgpu_release(vgpu);
695 static void intel_vgpu_release_work(struct work_struct *work)
697 struct intel_vgpu *vgpu = container_of(work, struct intel_vgpu,
700 __intel_vgpu_release(vgpu);
703 static uint64_t intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar)
705 u32 start_lo, start_hi;
708 start_lo = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) &
709 PCI_BASE_ADDRESS_MEM_MASK;
710 mem_type = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) &
711 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
714 case PCI_BASE_ADDRESS_MEM_TYPE_64:
715 start_hi = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space
718 case PCI_BASE_ADDRESS_MEM_TYPE_32:
719 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
720 /* 1M mem BAR treated as 32-bit BAR */
722 /* mem unknown type treated as 32-bit BAR */
727 return ((u64)start_hi << 32) | start_lo;
730 static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, uint64_t off,
731 void *buf, unsigned int count, bool is_write)
733 uint64_t bar_start = intel_vgpu_get_bar_addr(vgpu, bar);
737 ret = intel_gvt_ops->emulate_mmio_write(vgpu,
738 bar_start + off, buf, count);
740 ret = intel_gvt_ops->emulate_mmio_read(vgpu,
741 bar_start + off, buf, count);
745 static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, uint64_t off)
747 return off >= vgpu_aperture_offset(vgpu) &&
748 off < vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu);
751 static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, uint64_t off,
752 void *buf, unsigned long count, bool is_write)
756 if (!intel_vgpu_in_aperture(vgpu, off) ||
757 !intel_vgpu_in_aperture(vgpu, off + count)) {
758 gvt_vgpu_err("Invalid aperture offset %llu\n", off);
762 aperture_va = io_mapping_map_wc(&vgpu->gvt->dev_priv->ggtt.iomap,
763 ALIGN_DOWN(off, PAGE_SIZE),
764 count + offset_in_page(off));
769 memcpy(aperture_va + offset_in_page(off), buf, count);
771 memcpy(buf, aperture_va + offset_in_page(off), count);
773 io_mapping_unmap(aperture_va);
778 static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf,
779 size_t count, loff_t *ppos, bool is_write)
781 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
782 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos);
783 uint64_t pos = *ppos & VFIO_PCI_OFFSET_MASK;
787 if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions) {
788 gvt_vgpu_err("invalid index: %u\n", index);
793 case VFIO_PCI_CONFIG_REGION_INDEX:
795 ret = intel_gvt_ops->emulate_cfg_write(vgpu, pos,
798 ret = intel_gvt_ops->emulate_cfg_read(vgpu, pos,
801 case VFIO_PCI_BAR0_REGION_INDEX:
802 ret = intel_vgpu_bar_rw(vgpu, PCI_BASE_ADDRESS_0, pos,
803 buf, count, is_write);
805 case VFIO_PCI_BAR2_REGION_INDEX:
806 ret = intel_vgpu_aperture_rw(vgpu, pos, buf, count, is_write);
808 case VFIO_PCI_BAR1_REGION_INDEX:
809 case VFIO_PCI_BAR3_REGION_INDEX:
810 case VFIO_PCI_BAR4_REGION_INDEX:
811 case VFIO_PCI_BAR5_REGION_INDEX:
812 case VFIO_PCI_VGA_REGION_INDEX:
813 case VFIO_PCI_ROM_REGION_INDEX:
816 if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions)
819 index -= VFIO_PCI_NUM_REGIONS;
820 return vgpu->vdev.region[index].ops->rw(vgpu, buf, count,
824 return ret == 0 ? count : ret;
827 static bool gtt_entry(struct mdev_device *mdev, loff_t *ppos)
829 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
830 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos);
831 struct intel_gvt *gvt = vgpu->gvt;
834 /* Only allow MMIO GGTT entry access */
835 if (index != PCI_BASE_ADDRESS_0)
838 offset = (u64)(*ppos & VFIO_PCI_OFFSET_MASK) -
839 intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0);
841 return (offset >= gvt->device_info.gtt_start_offset &&
842 offset < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt)) ?
846 static ssize_t intel_vgpu_read(struct mdev_device *mdev, char __user *buf,
847 size_t count, loff_t *ppos)
849 unsigned int done = 0;
855 /* Only support GGTT entry 8 bytes read */
856 if (count >= 8 && !(*ppos % 8) &&
857 gtt_entry(mdev, ppos)) {
860 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val),
865 if (copy_to_user(buf, &val, sizeof(val)))
869 } else if (count >= 4 && !(*ppos % 4)) {
872 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val),
877 if (copy_to_user(buf, &val, sizeof(val)))
881 } else if (count >= 2 && !(*ppos % 2)) {
884 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val),
889 if (copy_to_user(buf, &val, sizeof(val)))
896 ret = intel_vgpu_rw(mdev, &val, sizeof(val), ppos,
901 if (copy_to_user(buf, &val, sizeof(val)))
919 static ssize_t intel_vgpu_write(struct mdev_device *mdev,
920 const char __user *buf,
921 size_t count, loff_t *ppos)
923 unsigned int done = 0;
929 /* Only support GGTT entry 8 bytes write */
930 if (count >= 8 && !(*ppos % 8) &&
931 gtt_entry(mdev, ppos)) {
934 if (copy_from_user(&val, buf, sizeof(val)))
937 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val),
943 } else if (count >= 4 && !(*ppos % 4)) {
946 if (copy_from_user(&val, buf, sizeof(val)))
949 ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val),
955 } else if (count >= 2 && !(*ppos % 2)) {
958 if (copy_from_user(&val, buf, sizeof(val)))
961 ret = intel_vgpu_rw(mdev, (char *)&val,
962 sizeof(val), ppos, true);
970 if (copy_from_user(&val, buf, sizeof(val)))
973 ret = intel_vgpu_rw(mdev, &val, sizeof(val),
992 static int intel_vgpu_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
996 unsigned long req_size, pgoff = 0;
998 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
1000 index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT);
1001 if (index >= VFIO_PCI_ROM_REGION_INDEX)
1004 if (vma->vm_end < vma->vm_start)
1006 if ((vma->vm_flags & VM_SHARED) == 0)
1008 if (index != VFIO_PCI_BAR2_REGION_INDEX)
1011 pg_prot = vma->vm_page_prot;
1012 virtaddr = vma->vm_start;
1013 req_size = vma->vm_end - vma->vm_start;
1014 pgoff = vgpu_aperture_pa_base(vgpu) >> PAGE_SHIFT;
1016 return remap_pfn_range(vma, virtaddr, pgoff, req_size, pg_prot);
1019 static int intel_vgpu_get_irq_count(struct intel_vgpu *vgpu, int type)
1021 if (type == VFIO_PCI_INTX_IRQ_INDEX || type == VFIO_PCI_MSI_IRQ_INDEX)
1027 static int intel_vgpu_set_intx_mask(struct intel_vgpu *vgpu,
1028 unsigned int index, unsigned int start,
1029 unsigned int count, uint32_t flags,
1035 static int intel_vgpu_set_intx_unmask(struct intel_vgpu *vgpu,
1036 unsigned int index, unsigned int start,
1037 unsigned int count, uint32_t flags, void *data)
1042 static int intel_vgpu_set_intx_trigger(struct intel_vgpu *vgpu,
1043 unsigned int index, unsigned int start, unsigned int count,
1044 uint32_t flags, void *data)
1049 static int intel_vgpu_set_msi_trigger(struct intel_vgpu *vgpu,
1050 unsigned int index, unsigned int start, unsigned int count,
1051 uint32_t flags, void *data)
1053 struct eventfd_ctx *trigger;
1055 if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
1056 int fd = *(int *)data;
1058 trigger = eventfd_ctx_fdget(fd);
1059 if (IS_ERR(trigger)) {
1060 gvt_vgpu_err("eventfd_ctx_fdget failed\n");
1061 return PTR_ERR(trigger);
1063 vgpu->vdev.msi_trigger = trigger;
1064 } else if ((flags & VFIO_IRQ_SET_DATA_NONE) && !count)
1065 intel_vgpu_release_msi_eventfd_ctx(vgpu);
1070 static int intel_vgpu_set_irqs(struct intel_vgpu *vgpu, uint32_t flags,
1071 unsigned int index, unsigned int start, unsigned int count,
1074 int (*func)(struct intel_vgpu *vgpu, unsigned int index,
1075 unsigned int start, unsigned int count, uint32_t flags,
1079 case VFIO_PCI_INTX_IRQ_INDEX:
1080 switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
1081 case VFIO_IRQ_SET_ACTION_MASK:
1082 func = intel_vgpu_set_intx_mask;
1084 case VFIO_IRQ_SET_ACTION_UNMASK:
1085 func = intel_vgpu_set_intx_unmask;
1087 case VFIO_IRQ_SET_ACTION_TRIGGER:
1088 func = intel_vgpu_set_intx_trigger;
1092 case VFIO_PCI_MSI_IRQ_INDEX:
1093 switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
1094 case VFIO_IRQ_SET_ACTION_MASK:
1095 case VFIO_IRQ_SET_ACTION_UNMASK:
1096 /* XXX Need masking support exported */
1098 case VFIO_IRQ_SET_ACTION_TRIGGER:
1099 func = intel_vgpu_set_msi_trigger;
1108 return func(vgpu, index, start, count, flags, data);
1111 static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
1114 struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
1115 unsigned long minsz;
1117 gvt_dbg_core("vgpu%d ioctl, cmd: %d\n", vgpu->id, cmd);
1119 if (cmd == VFIO_DEVICE_GET_INFO) {
1120 struct vfio_device_info info;
1122 minsz = offsetofend(struct vfio_device_info, num_irqs);
1124 if (copy_from_user(&info, (void __user *)arg, minsz))
1127 if (info.argsz < minsz)
1130 info.flags = VFIO_DEVICE_FLAGS_PCI;
1131 info.flags |= VFIO_DEVICE_FLAGS_RESET;
1132 info.num_regions = VFIO_PCI_NUM_REGIONS +
1133 vgpu->vdev.num_regions;
1134 info.num_irqs = VFIO_PCI_NUM_IRQS;
1136 return copy_to_user((void __user *)arg, &info, minsz) ?
1139 } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) {
1140 struct vfio_region_info info;
1141 struct vfio_info_cap caps = { .buf = NULL, .size = 0 };
1143 struct vfio_region_info_cap_sparse_mmap *sparse = NULL;
1148 minsz = offsetofend(struct vfio_region_info, offset);
1150 if (copy_from_user(&info, (void __user *)arg, minsz))
1153 if (info.argsz < minsz)
1156 switch (info.index) {
1157 case VFIO_PCI_CONFIG_REGION_INDEX:
1158 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
1159 info.size = vgpu->gvt->device_info.cfg_space_size;
1160 info.flags = VFIO_REGION_INFO_FLAG_READ |
1161 VFIO_REGION_INFO_FLAG_WRITE;
1163 case VFIO_PCI_BAR0_REGION_INDEX:
1164 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
1165 info.size = vgpu->cfg_space.bar[info.index].size;
1171 info.flags = VFIO_REGION_INFO_FLAG_READ |
1172 VFIO_REGION_INFO_FLAG_WRITE;
1174 case VFIO_PCI_BAR1_REGION_INDEX:
1175 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
1179 case VFIO_PCI_BAR2_REGION_INDEX:
1180 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
1181 info.flags = VFIO_REGION_INFO_FLAG_CAPS |
1182 VFIO_REGION_INFO_FLAG_MMAP |
1183 VFIO_REGION_INFO_FLAG_READ |
1184 VFIO_REGION_INFO_FLAG_WRITE;
1185 info.size = gvt_aperture_sz(vgpu->gvt);
1187 size = sizeof(*sparse) +
1188 (nr_areas * sizeof(*sparse->areas));
1189 sparse = kzalloc(size, GFP_KERNEL);
1193 sparse->header.id = VFIO_REGION_INFO_CAP_SPARSE_MMAP;
1194 sparse->header.version = 1;
1195 sparse->nr_areas = nr_areas;
1196 cap_type_id = VFIO_REGION_INFO_CAP_SPARSE_MMAP;
1197 sparse->areas[0].offset =
1198 PAGE_ALIGN(vgpu_aperture_offset(vgpu));
1199 sparse->areas[0].size = vgpu_aperture_sz(vgpu);
1202 case VFIO_PCI_BAR3_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX:
1203 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
1207 gvt_dbg_core("get region info bar:%d\n", info.index);
1210 case VFIO_PCI_ROM_REGION_INDEX:
1211 case VFIO_PCI_VGA_REGION_INDEX:
1212 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index);
1216 gvt_dbg_core("get region info index:%d\n", info.index);
1220 struct vfio_region_info_cap_type cap_type = {
1221 .header.id = VFIO_REGION_INFO_CAP_TYPE,
1222 .header.version = 1 };
1224 if (info.index >= VFIO_PCI_NUM_REGIONS +
1225 vgpu->vdev.num_regions)
1228 i = info.index - VFIO_PCI_NUM_REGIONS;
1231 VFIO_PCI_INDEX_TO_OFFSET(info.index);
1232 info.size = vgpu->vdev.region[i].size;
1233 info.flags = vgpu->vdev.region[i].flags;
1235 cap_type.type = vgpu->vdev.region[i].type;
1236 cap_type.subtype = vgpu->vdev.region[i].subtype;
1238 ret = vfio_info_add_capability(&caps,
1246 if ((info.flags & VFIO_REGION_INFO_FLAG_CAPS) && sparse) {
1247 switch (cap_type_id) {
1248 case VFIO_REGION_INFO_CAP_SPARSE_MMAP:
1249 ret = vfio_info_add_capability(&caps,
1250 &sparse->header, sizeof(*sparse) +
1252 sizeof(*sparse->areas)));
1263 info.flags |= VFIO_REGION_INFO_FLAG_CAPS;
1264 if (info.argsz < sizeof(info) + caps.size) {
1265 info.argsz = sizeof(info) + caps.size;
1266 info.cap_offset = 0;
1268 vfio_info_cap_shift(&caps, sizeof(info));
1269 if (copy_to_user((void __user *)arg +
1270 sizeof(info), caps.buf,
1275 info.cap_offset = sizeof(info);
1281 return copy_to_user((void __user *)arg, &info, minsz) ?
1283 } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) {
1284 struct vfio_irq_info info;
1286 minsz = offsetofend(struct vfio_irq_info, count);
1288 if (copy_from_user(&info, (void __user *)arg, minsz))
1291 if (info.argsz < minsz || info.index >= VFIO_PCI_NUM_IRQS)
1294 switch (info.index) {
1295 case VFIO_PCI_INTX_IRQ_INDEX:
1296 case VFIO_PCI_MSI_IRQ_INDEX:
1302 info.flags = VFIO_IRQ_INFO_EVENTFD;
1304 info.count = intel_vgpu_get_irq_count(vgpu, info.index);
1306 if (info.index == VFIO_PCI_INTX_IRQ_INDEX)
1307 info.flags |= (VFIO_IRQ_INFO_MASKABLE |
1308 VFIO_IRQ_INFO_AUTOMASKED);
1310 info.flags |= VFIO_IRQ_INFO_NORESIZE;
1312 return copy_to_user((void __user *)arg, &info, minsz) ?
1314 } else if (cmd == VFIO_DEVICE_SET_IRQS) {
1315 struct vfio_irq_set hdr;
1318 size_t data_size = 0;
1320 minsz = offsetofend(struct vfio_irq_set, count);
1322 if (copy_from_user(&hdr, (void __user *)arg, minsz))
1325 if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
1326 int max = intel_vgpu_get_irq_count(vgpu, hdr.index);
1328 ret = vfio_set_irqs_validate_and_prepare(&hdr, max,
1329 VFIO_PCI_NUM_IRQS, &data_size);
1331 gvt_vgpu_err("intel:vfio_set_irqs_validate_and_prepare failed\n");
1335 data = memdup_user((void __user *)(arg + minsz),
1338 return PTR_ERR(data);
1342 ret = intel_vgpu_set_irqs(vgpu, hdr.flags, hdr.index,
1343 hdr.start, hdr.count, data);
1347 } else if (cmd == VFIO_DEVICE_RESET) {
1348 intel_gvt_ops->vgpu_reset(vgpu);
1350 } else if (cmd == VFIO_DEVICE_QUERY_GFX_PLANE) {
1351 struct vfio_device_gfx_plane_info dmabuf;
1354 minsz = offsetofend(struct vfio_device_gfx_plane_info,
1356 if (copy_from_user(&dmabuf, (void __user *)arg, minsz))
1358 if (dmabuf.argsz < minsz)
1361 ret = intel_gvt_ops->vgpu_query_plane(vgpu, &dmabuf);
1365 return copy_to_user((void __user *)arg, &dmabuf, minsz) ?
1367 } else if (cmd == VFIO_DEVICE_GET_GFX_DMABUF) {
1371 if (get_user(dmabuf_id, (__u32 __user *)arg))
1374 dmabuf_fd = intel_gvt_ops->vgpu_get_dmabuf(vgpu, dmabuf_id);
1383 vgpu_id_show(struct device *dev, struct device_attribute *attr,
1386 struct mdev_device *mdev = mdev_from_dev(dev);
1389 struct intel_vgpu *vgpu = (struct intel_vgpu *)
1390 mdev_get_drvdata(mdev);
1391 return sprintf(buf, "%d\n", vgpu->id);
1393 return sprintf(buf, "\n");
1397 hw_id_show(struct device *dev, struct device_attribute *attr,
1400 struct mdev_device *mdev = mdev_from_dev(dev);
1403 struct intel_vgpu *vgpu = (struct intel_vgpu *)
1404 mdev_get_drvdata(mdev);
1405 return sprintf(buf, "%u\n",
1406 vgpu->submission.shadow_ctx->hw_id);
1408 return sprintf(buf, "\n");
1411 static DEVICE_ATTR_RO(vgpu_id);
1412 static DEVICE_ATTR_RO(hw_id);
1414 static struct attribute *intel_vgpu_attrs[] = {
1415 &dev_attr_vgpu_id.attr,
1416 &dev_attr_hw_id.attr,
1420 static const struct attribute_group intel_vgpu_group = {
1421 .name = "intel_vgpu",
1422 .attrs = intel_vgpu_attrs,
1425 static const struct attribute_group *intel_vgpu_groups[] = {
1430 static struct mdev_parent_ops intel_vgpu_ops = {
1431 .mdev_attr_groups = intel_vgpu_groups,
1432 .create = intel_vgpu_create,
1433 .remove = intel_vgpu_remove,
1435 .open = intel_vgpu_open,
1436 .release = intel_vgpu_release,
1438 .read = intel_vgpu_read,
1439 .write = intel_vgpu_write,
1440 .mmap = intel_vgpu_mmap,
1441 .ioctl = intel_vgpu_ioctl,
1444 static int kvmgt_host_init(struct device *dev, void *gvt, const void *ops)
1446 struct attribute **kvm_type_attrs;
1447 struct attribute_group **kvm_vgpu_type_groups;
1449 intel_gvt_ops = ops;
1450 if (!intel_gvt_ops->get_gvt_attrs(&kvm_type_attrs,
1451 &kvm_vgpu_type_groups))
1453 intel_vgpu_ops.supported_type_groups = kvm_vgpu_type_groups;
1455 return mdev_register_device(dev, &intel_vgpu_ops);
1458 static void kvmgt_host_exit(struct device *dev, void *gvt)
1460 mdev_unregister_device(dev);
1463 static int kvmgt_page_track_add(unsigned long handle, u64 gfn)
1465 struct kvmgt_guest_info *info;
1467 struct kvm_memory_slot *slot;
1470 if (!handle_valid(handle))
1473 info = (struct kvmgt_guest_info *)handle;
1476 idx = srcu_read_lock(&kvm->srcu);
1477 slot = gfn_to_memslot(kvm, gfn);
1479 srcu_read_unlock(&kvm->srcu, idx);
1483 spin_lock(&kvm->mmu_lock);
1485 if (kvmgt_gfn_is_write_protected(info, gfn))
1488 kvm_slot_page_track_add_page(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE);
1489 kvmgt_protect_table_add(info, gfn);
1492 spin_unlock(&kvm->mmu_lock);
1493 srcu_read_unlock(&kvm->srcu, idx);
1497 static int kvmgt_page_track_remove(unsigned long handle, u64 gfn)
1499 struct kvmgt_guest_info *info;
1501 struct kvm_memory_slot *slot;
1504 if (!handle_valid(handle))
1507 info = (struct kvmgt_guest_info *)handle;
1510 idx = srcu_read_lock(&kvm->srcu);
1511 slot = gfn_to_memslot(kvm, gfn);
1513 srcu_read_unlock(&kvm->srcu, idx);
1517 spin_lock(&kvm->mmu_lock);
1519 if (!kvmgt_gfn_is_write_protected(info, gfn))
1522 kvm_slot_page_track_remove_page(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE);
1523 kvmgt_protect_table_del(info, gfn);
1526 spin_unlock(&kvm->mmu_lock);
1527 srcu_read_unlock(&kvm->srcu, idx);
1531 static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa,
1532 const u8 *val, int len,
1533 struct kvm_page_track_notifier_node *node)
1535 struct kvmgt_guest_info *info = container_of(node,
1536 struct kvmgt_guest_info, track_node);
1538 if (kvmgt_gfn_is_write_protected(info, gpa_to_gfn(gpa)))
1539 intel_gvt_ops->write_protect_handler(info->vgpu, gpa,
1543 static void kvmgt_page_track_flush_slot(struct kvm *kvm,
1544 struct kvm_memory_slot *slot,
1545 struct kvm_page_track_notifier_node *node)
1549 struct kvmgt_guest_info *info = container_of(node,
1550 struct kvmgt_guest_info, track_node);
1552 spin_lock(&kvm->mmu_lock);
1553 for (i = 0; i < slot->npages; i++) {
1554 gfn = slot->base_gfn + i;
1555 if (kvmgt_gfn_is_write_protected(info, gfn)) {
1556 kvm_slot_page_track_remove_page(kvm, slot, gfn,
1557 KVM_PAGE_TRACK_WRITE);
1558 kvmgt_protect_table_del(info, gfn);
1561 spin_unlock(&kvm->mmu_lock);
1564 static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu, struct kvm *kvm)
1566 struct intel_vgpu *itr;
1567 struct kvmgt_guest_info *info;
1571 mutex_lock(&vgpu->gvt->lock);
1572 for_each_active_vgpu(vgpu->gvt, itr, id) {
1573 if (!handle_valid(itr->handle))
1576 info = (struct kvmgt_guest_info *)itr->handle;
1577 if (kvm && kvm == info->kvm) {
1583 mutex_unlock(&vgpu->gvt->lock);
1587 static int kvmgt_guest_init(struct mdev_device *mdev)
1589 struct kvmgt_guest_info *info;
1590 struct intel_vgpu *vgpu;
1593 vgpu = mdev_get_drvdata(mdev);
1594 if (handle_valid(vgpu->handle))
1597 kvm = vgpu->vdev.kvm;
1598 if (!kvm || kvm->mm != current->mm) {
1599 gvt_vgpu_err("KVM is required to use Intel vGPU\n");
1603 if (__kvmgt_vgpu_exist(vgpu, kvm))
1606 info = vzalloc(sizeof(struct kvmgt_guest_info));
1610 vgpu->handle = (unsigned long)info;
1613 kvm_get_kvm(info->kvm);
1615 kvmgt_protect_table_init(info);
1616 gvt_cache_init(vgpu);
1618 mutex_init(&vgpu->dmabuf_lock);
1619 init_completion(&vgpu->vblank_done);
1621 info->track_node.track_write = kvmgt_page_track_write;
1622 info->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
1623 kvm_page_track_register_notifier(kvm, &info->track_node);
1625 info->debugfs_cache_entries = debugfs_create_ulong(
1626 "kvmgt_nr_cache_entries",
1627 0444, vgpu->debugfs,
1628 &vgpu->vdev.nr_cache_entries);
1629 if (!info->debugfs_cache_entries)
1630 gvt_vgpu_err("Cannot create kvmgt debugfs entry\n");
1635 static bool kvmgt_guest_exit(struct kvmgt_guest_info *info)
1637 debugfs_remove(info->debugfs_cache_entries);
1639 kvm_page_track_unregister_notifier(info->kvm, &info->track_node);
1640 kvm_put_kvm(info->kvm);
1641 kvmgt_protect_table_destroy(info);
1642 gvt_cache_destroy(info->vgpu);
1648 static int kvmgt_attach_vgpu(void *vgpu, unsigned long *handle)
1650 /* nothing to do here */
1654 static void kvmgt_detach_vgpu(unsigned long handle)
1656 /* nothing to do here */
1659 static int kvmgt_inject_msi(unsigned long handle, u32 addr, u16 data)
1661 struct kvmgt_guest_info *info;
1662 struct intel_vgpu *vgpu;
1664 if (!handle_valid(handle))
1667 info = (struct kvmgt_guest_info *)handle;
1671 * When guest is poweroff, msi_trigger is set to NULL, but vgpu's
1672 * config and mmio register isn't restored to default during guest
1673 * poweroff. If this vgpu is still used in next vm, this vgpu's pipe
1674 * may be enabled, then once this vgpu is active, it will get inject
1675 * vblank interrupt request. But msi_trigger is null until msi is
1676 * enabled by guest. so if msi_trigger is null, success is still
1677 * returned and don't inject interrupt into guest.
1679 if (vgpu->vdev.msi_trigger == NULL)
1682 if (eventfd_signal(vgpu->vdev.msi_trigger, 1) == 1)
1688 static unsigned long kvmgt_gfn_to_pfn(unsigned long handle, unsigned long gfn)
1690 struct kvmgt_guest_info *info;
1693 if (!handle_valid(handle))
1694 return INTEL_GVT_INVALID_ADDR;
1696 info = (struct kvmgt_guest_info *)handle;
1698 pfn = gfn_to_pfn(info->kvm, gfn);
1699 if (is_error_noslot_pfn(pfn))
1700 return INTEL_GVT_INVALID_ADDR;
1705 static int kvmgt_dma_map_guest_page(unsigned long handle, unsigned long gfn,
1706 unsigned long size, dma_addr_t *dma_addr)
1708 struct kvmgt_guest_info *info;
1709 struct intel_vgpu *vgpu;
1710 struct gvt_dma *entry;
1713 if (!handle_valid(handle))
1716 info = (struct kvmgt_guest_info *)handle;
1719 mutex_lock(&info->vgpu->vdev.cache_lock);
1721 entry = __gvt_cache_find_gfn(info->vgpu, gfn);
1723 ret = gvt_dma_map_page(vgpu, gfn, dma_addr, size);
1727 ret = __gvt_cache_add(info->vgpu, gfn, *dma_addr, size);
1731 kref_get(&entry->ref);
1732 *dma_addr = entry->dma_addr;
1735 mutex_unlock(&info->vgpu->vdev.cache_lock);
1739 gvt_dma_unmap_page(vgpu, gfn, *dma_addr, size);
1741 mutex_unlock(&info->vgpu->vdev.cache_lock);
1745 static void __gvt_dma_release(struct kref *ref)
1747 struct gvt_dma *entry = container_of(ref, typeof(*entry), ref);
1749 gvt_dma_unmap_page(entry->vgpu, entry->gfn, entry->dma_addr,
1751 __gvt_cache_remove_entry(entry->vgpu, entry);
1754 static void kvmgt_dma_unmap_guest_page(unsigned long handle, dma_addr_t dma_addr)
1756 struct kvmgt_guest_info *info;
1757 struct gvt_dma *entry;
1759 if (!handle_valid(handle))
1762 info = (struct kvmgt_guest_info *)handle;
1764 mutex_lock(&info->vgpu->vdev.cache_lock);
1765 entry = __gvt_cache_find_dma_addr(info->vgpu, dma_addr);
1767 kref_put(&entry->ref, __gvt_dma_release);
1768 mutex_unlock(&info->vgpu->vdev.cache_lock);
1771 static int kvmgt_rw_gpa(unsigned long handle, unsigned long gpa,
1772 void *buf, unsigned long len, bool write)
1774 struct kvmgt_guest_info *info;
1777 bool kthread = current->mm == NULL;
1779 if (!handle_valid(handle))
1782 info = (struct kvmgt_guest_info *)handle;
1788 idx = srcu_read_lock(&kvm->srcu);
1789 ret = write ? kvm_write_guest(kvm, gpa, buf, len) :
1790 kvm_read_guest(kvm, gpa, buf, len);
1791 srcu_read_unlock(&kvm->srcu, idx);
1799 static int kvmgt_read_gpa(unsigned long handle, unsigned long gpa,
1800 void *buf, unsigned long len)
1802 return kvmgt_rw_gpa(handle, gpa, buf, len, false);
1805 static int kvmgt_write_gpa(unsigned long handle, unsigned long gpa,
1806 void *buf, unsigned long len)
1808 return kvmgt_rw_gpa(handle, gpa, buf, len, true);
1811 static unsigned long kvmgt_virt_to_pfn(void *addr)
1813 return PFN_DOWN(__pa(addr));
1816 static bool kvmgt_is_valid_gfn(unsigned long handle, unsigned long gfn)
1818 struct kvmgt_guest_info *info;
1821 if (!handle_valid(handle))
1824 info = (struct kvmgt_guest_info *)handle;
1827 return kvm_is_visible_gfn(kvm, gfn);
1831 struct intel_gvt_mpt kvmgt_mpt = {
1832 .host_init = kvmgt_host_init,
1833 .host_exit = kvmgt_host_exit,
1834 .attach_vgpu = kvmgt_attach_vgpu,
1835 .detach_vgpu = kvmgt_detach_vgpu,
1836 .inject_msi = kvmgt_inject_msi,
1837 .from_virt_to_mfn = kvmgt_virt_to_pfn,
1838 .enable_page_track = kvmgt_page_track_add,
1839 .disable_page_track = kvmgt_page_track_remove,
1840 .read_gpa = kvmgt_read_gpa,
1841 .write_gpa = kvmgt_write_gpa,
1842 .gfn_to_mfn = kvmgt_gfn_to_pfn,
1843 .dma_map_guest_page = kvmgt_dma_map_guest_page,
1844 .dma_unmap_guest_page = kvmgt_dma_unmap_guest_page,
1845 .set_opregion = kvmgt_set_opregion,
1846 .get_vfio_device = kvmgt_get_vfio_device,
1847 .put_vfio_device = kvmgt_put_vfio_device,
1848 .is_valid_gfn = kvmgt_is_valid_gfn,
1850 EXPORT_SYMBOL_GPL(kvmgt_mpt);
1852 static int __init kvmgt_init(void)
1857 static void __exit kvmgt_exit(void)
1861 module_init(kvmgt_init);
1862 module_exit(kvmgt_exit);
1864 MODULE_LICENSE("GPL and additional rights");
1865 MODULE_AUTHOR("Intel Corporation");