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> |
Paul Gortmaker | 51441d4 | 2011-07-27 21:25:05 -0400 | [diff] [blame] | 28 | #include <linux/module.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 29 | #include <linux/pci.h> |
Paul Gortmaker | 799fd8b | 2011-07-27 21:17:59 -0400 | [diff] [blame] | 30 | #include <linux/stat.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 31 | #include <linux/dmar.h> |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 32 | #include <linux/iommu.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 33 | #include <linux/intel-iommu.h> |
| 34 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 35 | static bool allow_unsafe_assigned_interrupts; |
Alex Williamson | 3f68b031 | 2011-07-14 13:27:03 -0600 | [diff] [blame] | 36 | module_param_named(allow_unsafe_assigned_interrupts, |
| 37 | allow_unsafe_assigned_interrupts, bool, S_IRUGO | S_IWUSR); |
| 38 | MODULE_PARM_DESC(allow_unsafe_assigned_interrupts, |
| 39 | "Enable device assignment on platforms without interrupt remapping support."); |
| 40 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 41 | static int kvm_iommu_unmap_memslots(struct kvm *kvm); |
| 42 | static void kvm_iommu_put_pages(struct kvm *kvm, |
| 43 | gfn_t base_gfn, unsigned long npages); |
| 44 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 45 | static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot, |
| 46 | gfn_t gfn, unsigned long size) |
| 47 | { |
| 48 | gfn_t end_gfn; |
| 49 | pfn_t pfn; |
| 50 | |
| 51 | pfn = gfn_to_pfn_memslot(kvm, slot, gfn); |
| 52 | end_gfn = gfn + (size >> PAGE_SHIFT); |
| 53 | gfn += 1; |
| 54 | |
| 55 | if (is_error_pfn(pfn)) |
| 56 | return pfn; |
| 57 | |
| 58 | while (gfn < end_gfn) |
| 59 | gfn_to_pfn_memslot(kvm, slot, gfn++); |
| 60 | |
| 61 | return pfn; |
| 62 | } |
| 63 | |
Marcelo Tosatti | 3ad26d8 | 2009-12-23 14:35:20 -0200 | [diff] [blame] | 64 | 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] | 65 | { |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 66 | gfn_t gfn, end_gfn; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 67 | pfn_t pfn; |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 68 | int r = 0; |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 69 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 70 | int flags; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 71 | |
| 72 | /* check if iommu exists and in use */ |
| 73 | if (!domain) |
| 74 | return 0; |
| 75 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 76 | gfn = slot->base_gfn; |
| 77 | end_gfn = gfn + slot->npages; |
| 78 | |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 79 | flags = IOMMU_READ | IOMMU_WRITE; |
| 80 | if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY) |
| 81 | flags |= IOMMU_CACHE; |
| 82 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 83 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 84 | while (gfn < end_gfn) { |
| 85 | unsigned long page_size; |
| 86 | |
| 87 | /* Check if already mapped */ |
| 88 | if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) { |
| 89 | gfn += 1; |
| 90 | continue; |
| 91 | } |
| 92 | |
| 93 | /* Get the page size we could use to map */ |
| 94 | page_size = kvm_host_page_size(kvm, gfn); |
| 95 | |
| 96 | /* Make sure the page_size does not exceed the memslot */ |
| 97 | while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn) |
| 98 | page_size >>= 1; |
| 99 | |
| 100 | /* Make sure gfn is aligned to the page size we want to map */ |
| 101 | while ((gfn << PAGE_SHIFT) & (page_size - 1)) |
| 102 | page_size >>= 1; |
| 103 | |
| 104 | /* |
| 105 | * Pin all pages we are about to map in memory. This is |
| 106 | * important because we unmap and unpin in 4kb steps later. |
| 107 | */ |
| 108 | pfn = kvm_pin_pages(kvm, slot, gfn, page_size); |
| 109 | if (is_error_pfn(pfn)) { |
| 110 | gfn += 1; |
| 111 | continue; |
| 112 | } |
| 113 | |
| 114 | /* Map into IO address space */ |
| 115 | r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn), |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 116 | page_size, flags); |
Weidong Han | e5fcfc8 | 2008-09-25 23:32:02 +0800 | [diff] [blame] | 117 | if (r) { |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 118 | printk(KERN_ERR "kvm_iommu_map_address:" |
Joerg Roedel | 5689cc5 | 2010-07-01 16:00:12 +0200 | [diff] [blame] | 119 | "iommu failed to map pfn=%llx\n", pfn); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 120 | goto unmap_pages; |
| 121 | } |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 122 | |
| 123 | gfn += page_size >> PAGE_SHIFT; |
| 124 | |
| 125 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 126 | } |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 127 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 128 | return 0; |
| 129 | |
| 130 | unmap_pages: |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 131 | kvm_iommu_put_pages(kvm, slot->base_gfn, gfn); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 132 | return r; |
| 133 | } |
| 134 | |
| 135 | static int kvm_iommu_map_memslots(struct kvm *kvm) |
| 136 | { |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 137 | int idx, r = 0; |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 138 | struct kvm_memslots *slots; |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 139 | struct kvm_memory_slot *memslot; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 140 | |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 141 | idx = srcu_read_lock(&kvm->srcu); |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 142 | slots = kvm_memslots(kvm); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 143 | |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 144 | kvm_for_each_memslot(memslot, slots) { |
| 145 | r = kvm_iommu_map_pages(kvm, memslot); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 146 | if (r) |
| 147 | break; |
| 148 | } |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 149 | srcu_read_unlock(&kvm->srcu, idx); |
Mark McLoughlin | 682edb4 | 2009-02-05 18:23:46 +0000 | [diff] [blame] | 150 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 151 | return r; |
| 152 | } |
| 153 | |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 154 | int kvm_assign_device(struct kvm *kvm, |
| 155 | struct kvm_assigned_dev_kernel *assigned_dev) |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 156 | { |
| 157 | struct pci_dev *pdev = NULL; |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 158 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 159 | int r, last_flags; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 160 | |
| 161 | /* check if iommu exists and in use */ |
| 162 | if (!domain) |
| 163 | return 0; |
| 164 | |
| 165 | pdev = assigned_dev->dev; |
| 166 | if (pdev == NULL) |
| 167 | return -ENODEV; |
| 168 | |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 169 | r = iommu_attach_device(domain, &pdev->dev); |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 170 | if (r) { |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 171 | printk(KERN_ERR "assign device %x:%x:%x.%x failed", |
| 172 | pci_domain_nr(pdev->bus), |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 173 | pdev->bus->number, |
| 174 | PCI_SLOT(pdev->devfn), |
| 175 | PCI_FUNC(pdev->devfn)); |
| 176 | return r; |
| 177 | } |
| 178 | |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 179 | last_flags = kvm->arch.iommu_flags; |
| 180 | if (iommu_domain_has_cap(kvm->arch.iommu_domain, |
| 181 | IOMMU_CAP_CACHE_COHERENCY)) |
| 182 | kvm->arch.iommu_flags |= KVM_IOMMU_CACHE_COHERENCY; |
| 183 | |
| 184 | /* Check if need to update IOMMU page table for guest memory */ |
| 185 | if ((last_flags ^ kvm->arch.iommu_flags) == |
| 186 | KVM_IOMMU_CACHE_COHERENCY) { |
| 187 | kvm_iommu_unmap_memslots(kvm); |
| 188 | r = kvm_iommu_map_memslots(kvm); |
| 189 | if (r) |
| 190 | goto out_unmap; |
| 191 | } |
| 192 | |
Greg Rose | 6777829 | 2011-07-22 05:46:07 +0000 | [diff] [blame] | 193 | pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED; |
| 194 | |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 195 | printk(KERN_DEBUG "assign device %x:%x:%x.%x\n", |
| 196 | assigned_dev->host_segnr, |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 197 | assigned_dev->host_busnr, |
| 198 | PCI_SLOT(assigned_dev->host_devfn), |
| 199 | PCI_FUNC(assigned_dev->host_devfn)); |
| 200 | |
| 201 | return 0; |
Sheng Yang | 522c68c | 2009-04-27 20:35:43 +0800 | [diff] [blame] | 202 | out_unmap: |
| 203 | kvm_iommu_unmap_memslots(kvm); |
| 204 | return r; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 205 | } |
| 206 | |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 207 | int kvm_deassign_device(struct kvm *kvm, |
| 208 | struct kvm_assigned_dev_kernel *assigned_dev) |
| 209 | { |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 210 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 211 | struct pci_dev *pdev = NULL; |
| 212 | |
| 213 | /* check if iommu exists and in use */ |
| 214 | if (!domain) |
| 215 | return 0; |
| 216 | |
| 217 | pdev = assigned_dev->dev; |
| 218 | if (pdev == NULL) |
| 219 | return -ENODEV; |
| 220 | |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 221 | iommu_detach_device(domain, &pdev->dev); |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 222 | |
Greg Rose | 6777829 | 2011-07-22 05:46:07 +0000 | [diff] [blame] | 223 | pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; |
| 224 | |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 225 | printk(KERN_DEBUG "deassign device %x:%x:%x.%x\n", |
| 226 | assigned_dev->host_segnr, |
Weidong Han | 0a92035 | 2008-12-02 21:24:23 +0800 | [diff] [blame] | 227 | assigned_dev->host_busnr, |
| 228 | PCI_SLOT(assigned_dev->host_devfn), |
| 229 | PCI_FUNC(assigned_dev->host_devfn)); |
| 230 | |
| 231 | return 0; |
| 232 | } |
| 233 | |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 234 | int kvm_iommu_map_guest(struct kvm *kvm) |
| 235 | { |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 236 | int r; |
| 237 | |
Joerg Roedel | a1b60c1 | 2011-09-06 18:46:34 +0200 | [diff] [blame] | 238 | if (!iommu_present(&pci_bus_type)) { |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 239 | printk(KERN_ERR "%s: iommu not found\n", __func__); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 240 | return -ENODEV; |
| 241 | } |
| 242 | |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 243 | mutex_lock(&kvm->slots_lock); |
| 244 | |
Joerg Roedel | 905d66c | 2011-09-06 16:03:26 +0200 | [diff] [blame] | 245 | kvm->arch.iommu_domain = iommu_domain_alloc(&pci_bus_type); |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 246 | if (!kvm->arch.iommu_domain) { |
| 247 | r = -ENOMEM; |
| 248 | goto out_unlock; |
| 249 | } |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 250 | |
Alex Williamson | 3f68b031 | 2011-07-14 13:27:03 -0600 | [diff] [blame] | 251 | if (!allow_unsafe_assigned_interrupts && |
| 252 | !iommu_domain_has_cap(kvm->arch.iommu_domain, |
| 253 | IOMMU_CAP_INTR_REMAP)) { |
| 254 | printk(KERN_WARNING "%s: No interrupt remapping support," |
| 255 | " disallowing device assignment." |
| 256 | " Re-enble with \"allow_unsafe_assigned_interrupts=1\"" |
| 257 | " module option.\n", __func__); |
| 258 | iommu_domain_free(kvm->arch.iommu_domain); |
| 259 | kvm->arch.iommu_domain = NULL; |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 260 | r = -EPERM; |
| 261 | goto out_unlock; |
Alex Williamson | 3f68b031 | 2011-07-14 13:27:03 -0600 | [diff] [blame] | 262 | } |
| 263 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 264 | r = kvm_iommu_map_memslots(kvm); |
| 265 | if (r) |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 266 | kvm_iommu_unmap_memslots(kvm); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 267 | |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 268 | out_unlock: |
| 269 | mutex_unlock(&kvm->slots_lock); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 270 | return r; |
| 271 | } |
| 272 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 273 | static void kvm_unpin_pages(struct kvm *kvm, pfn_t pfn, unsigned long npages) |
| 274 | { |
| 275 | unsigned long i; |
| 276 | |
| 277 | for (i = 0; i < npages; ++i) |
| 278 | kvm_release_pfn_clean(pfn + i); |
| 279 | } |
| 280 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 281 | static void kvm_iommu_put_pages(struct kvm *kvm, |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 282 | gfn_t base_gfn, unsigned long npages) |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 283 | { |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 284 | struct iommu_domain *domain; |
| 285 | gfn_t end_gfn, gfn; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 286 | pfn_t pfn; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 287 | u64 phys; |
| 288 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 289 | domain = kvm->arch.iommu_domain; |
| 290 | end_gfn = base_gfn + npages; |
| 291 | gfn = base_gfn; |
| 292 | |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 293 | /* check if iommu exists and in use */ |
| 294 | if (!domain) |
| 295 | return; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 296 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 297 | while (gfn < end_gfn) { |
| 298 | unsigned long unmap_pages; |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 299 | size_t size; |
Weidong Han | 260782b | 2008-12-02 21:03:39 +0800 | [diff] [blame] | 300 | |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 301 | /* Get physical address */ |
| 302 | phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn)); |
| 303 | pfn = phys >> PAGE_SHIFT; |
| 304 | |
| 305 | /* Unmap address from IO address space */ |
Ohad Ben-Cohen | 7d3002c | 2011-11-10 11:32:26 +0200 | [diff] [blame] | 306 | size = iommu_unmap(domain, gfn_to_gpa(gfn), PAGE_SIZE); |
| 307 | unmap_pages = 1ULL << get_order(size); |
Joerg Roedel | fcd9580 | 2010-01-11 16:38:18 +0100 | [diff] [blame] | 308 | |
| 309 | /* Unpin all pages we just unmapped to not leak any memory */ |
| 310 | kvm_unpin_pages(kvm, pfn, unmap_pages); |
| 311 | |
| 312 | gfn += unmap_pages; |
| 313 | } |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 314 | } |
| 315 | |
Alex Williamson | 32f6daa | 2012-04-11 09:51:49 -0600 | [diff] [blame] | 316 | void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot) |
| 317 | { |
| 318 | kvm_iommu_put_pages(kvm, slot->base_gfn, slot->npages); |
| 319 | } |
| 320 | |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 321 | static int kvm_iommu_unmap_memslots(struct kvm *kvm) |
| 322 | { |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 323 | int idx; |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 324 | struct kvm_memslots *slots; |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 325 | struct kvm_memory_slot *memslot; |
Mark McLoughlin | 682edb4 | 2009-02-05 18:23:46 +0000 | [diff] [blame] | 326 | |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 327 | idx = srcu_read_lock(&kvm->srcu); |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 328 | slots = kvm_memslots(kvm); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 329 | |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 330 | kvm_for_each_memslot(memslot, slots) |
Alex Williamson | 32f6daa | 2012-04-11 09:51:49 -0600 | [diff] [blame] | 331 | kvm_iommu_unmap_pages(kvm, memslot); |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 332 | |
Sheng Yang | 95c87e2 | 2010-07-01 15:00:50 +0800 | [diff] [blame] | 333 | srcu_read_unlock(&kvm->srcu, idx); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | int kvm_iommu_unmap_guest(struct kvm *kvm) |
| 339 | { |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 340 | struct iommu_domain *domain = kvm->arch.iommu_domain; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 341 | |
| 342 | /* check if iommu exists and in use */ |
| 343 | if (!domain) |
| 344 | return 0; |
| 345 | |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 346 | mutex_lock(&kvm->slots_lock); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 347 | kvm_iommu_unmap_memslots(kvm); |
Alex Williamson | 21a1416 | 2012-04-17 21:46:44 -0600 | [diff] [blame] | 348 | kvm->arch.iommu_domain = NULL; |
| 349 | mutex_unlock(&kvm->slots_lock); |
| 350 | |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 351 | iommu_domain_free(domain); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 352 | return 0; |
| 353 | } |