Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006, Intel Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Copyright (C) 2006-2008 Intel Corporation |
| 18 | * Copyright IBM Corporation, 2008 |
Avi Kivity | 221d059 | 2010-05-23 18:37:00 +0300 | [diff] [blame] | 19 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
| 20 | * |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 21 | * Author: Allen M. Kay <allen.m.kay@intel.com> |
| 22 | * Author: Weidong Han <weidong.han@intel.com> |
| 23 | * Author: Ben-Ami Yassour <benami@il.ibm.com> |
| 24 | */ |
| 25 | |
| 26 | #include <linux/list.h> |
| 27 | #include <linux/kvm_host.h> |
| 28 | #include <linux/pci.h> |
Paul Gortmaker | 799fd8b | 2011-07-27 21:17:59 -0400 | [diff] [blame^] | 29 | #include <linux/stat.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 30 | #include <linux/dmar.h> |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 31 | #include <linux/iommu.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 32 | #include <linux/intel-iommu.h> |
| 33 | |
Alex Williamson | 3f68b03 | 2011-07-14 13:27:03 -0600 | [diff] [blame] | 34 | static int allow_unsafe_assigned_interrupts; |
| 35 | module_param_named(allow_unsafe_assigned_interrupts, |
| 36 | allow_unsafe_assigned_interrupts, bool, S_IRUGO | S_IWUSR); |
| 37 | MODULE_PARM_DESC(allow_unsafe_assigned_interrupts, |
| 38 | "Enable device assignment on platforms without interrupt remapping support."); |
| 39 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 40 | static int kvm_iommu_unmap_memslots(struct kvm *kvm); |
| 41 | static void kvm_iommu_put_pages(struct kvm *kvm, |
| 42 | gfn_t base_gfn, unsigned long npages); |
| 43 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 44 | static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot, |
| 45 | gfn_t gfn, unsigned long size) |
| 46 | { |
| 47 | gfn_t end_gfn; |
| 48 | pfn_t pfn; |
| 49 | |
| 50 | pfn = gfn_to_pfn_memslot(kvm, slot, gfn); |
| 51 | end_gfn = gfn + (size >> PAGE_SHIFT); |
| 52 | gfn += 1; |
| 53 | |
| 54 | if (is_error_pfn(pfn)) |
| 55 | return pfn; |
| 56 | |
| 57 | while (gfn < end_gfn) |
| 58 | gfn_to_pfn_memslot(kvm, slot, gfn++); |
| 59 | |
| 60 | return pfn; |
| 61 | } |
| 62 | |
Marcelo Tosatti | 3ad26d8 | 2009-12-23 14:35:20 -0200 | [diff] [blame] | 63 | int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 64 | { |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 65 | gfn_t gfn, end_gfn; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 66 | pfn_t pfn; |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 67 | int r = 0; |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 68 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 69 | int flags; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 70 | |
| 71 | /* check if iommu exists and in use */ |
| 72 | if (!domain) |
| 73 | return 0; |
| 74 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 75 | gfn = slot->base_gfn; |
| 76 | end_gfn = gfn + slot->npages; |
| 77 | |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 78 | flags = IOMMU_READ | IOMMU_WRITE; |
| 79 | if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY) |
| 80 | flags |= IOMMU_CACHE; |
| 81 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 82 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 83 | while (gfn < end_gfn) { |
| 84 | unsigned long page_size; |
| 85 | |
| 86 | /* Check if already mapped */ |
| 87 | if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) { |
| 88 | gfn += 1; |
| 89 | continue; |
| 90 | } |
| 91 | |
| 92 | /* Get the page size we could use to map */ |
| 93 | page_size = kvm_host_page_size(kvm, gfn); |
| 94 | |
| 95 | /* Make sure the page_size does not exceed the memslot */ |
| 96 | while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn) |
| 97 | page_size >>= 1; |
| 98 | |
| 99 | /* Make sure gfn is aligned to the page size we want to map */ |
| 100 | while ((gfn << PAGE_SHIFT) & (page_size - 1)) |
| 101 | page_size >>= 1; |
| 102 | |
| 103 | /* |
| 104 | * Pin all pages we are about to map in memory. This is |
| 105 | * important because we unmap and unpin in 4kb steps later. |
| 106 | */ |
| 107 | pfn = kvm_pin_pages(kvm, slot, gfn, page_size); |
| 108 | if (is_error_pfn(pfn)) { |
| 109 | gfn += 1; |
| 110 | continue; |
| 111 | } |
| 112 | |
| 113 | /* Map into IO address space */ |
| 114 | r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn), |
| 115 | get_order(page_size), flags); |
Weidong Han | e5fcfc8 | 2008-09-25 23:32:02 +0800 | [diff] [blame] | 116 | if (r) { |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 117 | printk(KERN_ERR "kvm_iommu_map_address:" |
Joerg Roedel | 5689cc5 | 2010-07-01 16:00:12 +0200 | [diff] [blame] | 118 | "iommu failed to map pfn=%llx\n", pfn); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 119 | goto unmap_pages; |
| 120 | } |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 121 | |
| 122 | gfn += page_size >> PAGE_SHIFT; |
| 123 | |
| 124 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 125 | } |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 126 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 127 | return 0; |
| 128 | |
| 129 | unmap_pages: |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 130 | kvm_iommu_put_pages(kvm, slot->base_gfn, gfn); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 131 | return r; |
| 132 | } |
| 133 | |
| 134 | static int kvm_iommu_map_memslots(struct kvm *kvm) |
| 135 | { |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 136 | int i, idx, r = 0; |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 137 | struct kvm_memslots *slots; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 138 | |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 139 | idx = srcu_read_lock(&kvm->srcu); |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 140 | slots = kvm_memslots(kvm); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 141 | |
| 142 | for (i = 0; i < slots->nmemslots; i++) { |
Marcelo Tosatti | 3ad26d8 | 2009-12-23 14:35:20 -0200 | [diff] [blame] | 143 | r = kvm_iommu_map_pages(kvm, &slots->memslots[i]); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 144 | if (r) |
| 145 | break; |
| 146 | } |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 147 | srcu_read_unlock(&kvm->srcu, idx); |
Mark McLoughlin | 682edb4 | 2009-02-05 18:23:46 +0000 | [diff] [blame] | 148 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 149 | return r; |
| 150 | } |
| 151 | |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 152 | int kvm_assign_device(struct kvm *kvm, |
| 153 | struct kvm_assigned_dev_kernel *assigned_dev) |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 154 | { |
| 155 | struct pci_dev *pdev = NULL; |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 156 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 157 | int r, last_flags; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 158 | |
| 159 | /* check if iommu exists and in use */ |
| 160 | if (!domain) |
| 161 | return 0; |
| 162 | |
| 163 | pdev = assigned_dev->dev; |
| 164 | if (pdev == NULL) |
| 165 | return -ENODEV; |
| 166 | |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 167 | r = iommu_attach_device(domain, &pdev->dev); |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 168 | if (r) { |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 169 | printk(KERN_ERR "assign device %x:%x:%x.%x failed", |
| 170 | pci_domain_nr(pdev->bus), |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 171 | pdev->bus->number, |
| 172 | PCI_SLOT(pdev->devfn), |
| 173 | PCI_FUNC(pdev->devfn)); |
| 174 | return r; |
| 175 | } |
| 176 | |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 177 | last_flags = kvm->arch.iommu_flags; |
| 178 | if (iommu_domain_has_cap(kvm->arch.iommu_domain, |
| 179 | IOMMU_CAP_CACHE_COHERENCY)) |
| 180 | kvm->arch.iommu_flags |= KVM_IOMMU_CACHE_COHERENCY; |
| 181 | |
| 182 | /* Check if need to update IOMMU page table for guest memory */ |
| 183 | if ((last_flags ^ kvm->arch.iommu_flags) == |
| 184 | KVM_IOMMU_CACHE_COHERENCY) { |
| 185 | kvm_iommu_unmap_memslots(kvm); |
| 186 | r = kvm_iommu_map_memslots(kvm); |
| 187 | if (r) |
| 188 | goto out_unmap; |
| 189 | } |
| 190 | |
Greg Rose | 6777829 | 2011-07-22 05:46:07 +0000 | [diff] [blame] | 191 | pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED; |
| 192 | |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 193 | printk(KERN_DEBUG "assign device %x:%x:%x.%x\n", |
| 194 | assigned_dev->host_segnr, |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 195 | assigned_dev->host_busnr, |
| 196 | PCI_SLOT(assigned_dev->host_devfn), |
| 197 | PCI_FUNC(assigned_dev->host_devfn)); |
| 198 | |
| 199 | return 0; |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 200 | out_unmap: |
| 201 | kvm_iommu_unmap_memslots(kvm); |
| 202 | return r; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 203 | } |
| 204 | |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 205 | int kvm_deassign_device(struct kvm *kvm, |
| 206 | struct kvm_assigned_dev_kernel *assigned_dev) |
| 207 | { |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 208 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 209 | struct pci_dev *pdev = NULL; |
| 210 | |
| 211 | /* check if iommu exists and in use */ |
| 212 | if (!domain) |
| 213 | return 0; |
| 214 | |
| 215 | pdev = assigned_dev->dev; |
| 216 | if (pdev == NULL) |
| 217 | return -ENODEV; |
| 218 | |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 219 | iommu_detach_device(domain, &pdev->dev); |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 220 | |
Greg Rose | 6777829 | 2011-07-22 05:46:07 +0000 | [diff] [blame] | 221 | pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; |
| 222 | |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 223 | printk(KERN_DEBUG "deassign device %x:%x:%x.%x\n", |
| 224 | assigned_dev->host_segnr, |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 225 | assigned_dev->host_busnr, |
| 226 | PCI_SLOT(assigned_dev->host_devfn), |
| 227 | PCI_FUNC(assigned_dev->host_devfn)); |
| 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 232 | int kvm_iommu_map_guest(struct kvm *kvm) |
| 233 | { |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 234 | int r; |
| 235 | |
Joerg Roedel | a1b60c1 | 2011-09-06 18:46:34 +0200 | [diff] [blame] | 236 | if (!iommu_present(&pci_bus_type)) { |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 237 | printk(KERN_ERR "%s: iommu not found\n", __func__); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 238 | return -ENODEV; |
| 239 | } |
| 240 | |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame] | 241 | kvm->arch.iommu_domain = iommu_domain_alloc(&pci_bus_type); |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 242 | if (!kvm->arch.iommu_domain) |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 243 | return -ENOMEM; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 244 | |
Alex Williamson | 3f68b03 | 2011-07-14 13:27:03 -0600 | [diff] [blame] | 245 | if (!allow_unsafe_assigned_interrupts && |
| 246 | !iommu_domain_has_cap(kvm->arch.iommu_domain, |
| 247 | IOMMU_CAP_INTR_REMAP)) { |
| 248 | printk(KERN_WARNING "%s: No interrupt remapping support," |
| 249 | " disallowing device assignment." |
| 250 | " Re-enble with \"allow_unsafe_assigned_interrupts=1\"" |
| 251 | " module option.\n", __func__); |
| 252 | iommu_domain_free(kvm->arch.iommu_domain); |
| 253 | kvm->arch.iommu_domain = NULL; |
| 254 | return -EPERM; |
| 255 | } |
| 256 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 257 | r = kvm_iommu_map_memslots(kvm); |
| 258 | if (r) |
| 259 | goto out_unmap; |
| 260 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 261 | return 0; |
| 262 | |
| 263 | out_unmap: |
| 264 | kvm_iommu_unmap_memslots(kvm); |
| 265 | return r; |
| 266 | } |
| 267 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 268 | static void kvm_unpin_pages(struct kvm *kvm, pfn_t pfn, unsigned long npages) |
| 269 | { |
| 270 | unsigned long i; |
| 271 | |
| 272 | for (i = 0; i < npages; ++i) |
| 273 | kvm_release_pfn_clean(pfn + i); |
| 274 | } |
| 275 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 276 | static void kvm_iommu_put_pages(struct kvm *kvm, |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 277 | gfn_t base_gfn, unsigned long npages) |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 278 | { |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 279 | struct iommu_domain *domain; |
| 280 | gfn_t end_gfn, gfn; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 281 | pfn_t pfn; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 282 | u64 phys; |
| 283 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 284 | domain = kvm->arch.iommu_domain; |
| 285 | end_gfn = base_gfn + npages; |
| 286 | gfn = base_gfn; |
| 287 | |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 288 | /* check if iommu exists and in use */ |
| 289 | if (!domain) |
| 290 | return; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 291 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 292 | while (gfn < end_gfn) { |
| 293 | unsigned long unmap_pages; |
| 294 | int order; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 295 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 296 | /* Get physical address */ |
| 297 | phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn)); |
| 298 | pfn = phys >> PAGE_SHIFT; |
| 299 | |
| 300 | /* Unmap address from IO address space */ |
Jan Kiszka | 05b782a | 2010-05-26 21:36:33 +0200 | [diff] [blame] | 301 | order = iommu_unmap(domain, gfn_to_gpa(gfn), 0); |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 302 | unmap_pages = 1ULL << order; |
| 303 | |
| 304 | /* Unpin all pages we just unmapped to not leak any memory */ |
| 305 | kvm_unpin_pages(kvm, pfn, unmap_pages); |
| 306 | |
| 307 | gfn += unmap_pages; |
| 308 | } |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | static int kvm_iommu_unmap_memslots(struct kvm *kvm) |
| 312 | { |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 313 | int i, idx; |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 314 | struct kvm_memslots *slots; |
Mark McLoughlin | 682edb4 | 2009-02-05 18:23:46 +0000 | [diff] [blame] | 315 | |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 316 | idx = srcu_read_lock(&kvm->srcu); |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 317 | slots = kvm_memslots(kvm); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 318 | |
| 319 | for (i = 0; i < slots->nmemslots; i++) { |
| 320 | kvm_iommu_put_pages(kvm, slots->memslots[i].base_gfn, |
| 321 | slots->memslots[i].npages); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 322 | } |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 323 | srcu_read_unlock(&kvm->srcu, idx); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | int kvm_iommu_unmap_guest(struct kvm *kvm) |
| 329 | { |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 330 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 331 | |
| 332 | /* check if iommu exists and in use */ |
| 333 | if (!domain) |
| 334 | return 0; |
| 335 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 336 | kvm_iommu_unmap_memslots(kvm); |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 337 | iommu_domain_free(domain); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 338 | return 0; |
| 339 | } |