Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * This module enables machines with Intel VT-x extensions to run virtual |
| 5 | * machines without emulation or binary translation. |
| 6 | * |
| 7 | * Copyright (C) 2006 Qumranet, Inc. |
| 8 | * |
| 9 | * Authors: |
| 10 | * Avi Kivity <avi@qumranet.com> |
| 11 | * Yaniv Kamay <yaniv@qumranet.com> |
| 12 | * |
| 13 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 14 | * the COPYING file in the top-level directory. |
| 15 | * |
| 16 | */ |
| 17 | |
Hollis Blanchard | e217402 | 2007-12-03 15:30:24 -0600 | [diff] [blame] | 18 | #include "iodev.h" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 19 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 20 | #include <linux/kvm_host.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 21 | #include <linux/kvm.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/errno.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 24 | #include <linux/percpu.h> |
| 25 | #include <linux/gfp.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 26 | #include <linux/mm.h> |
| 27 | #include <linux/miscdevice.h> |
| 28 | #include <linux/vmalloc.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 29 | #include <linux/reboot.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 30 | #include <linux/debugfs.h> |
| 31 | #include <linux/highmem.h> |
| 32 | #include <linux/file.h> |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 33 | #include <linux/sysdev.h> |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 34 | #include <linux/cpu.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 35 | #include <linux/sched.h> |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 36 | #include <linux/cpumask.h> |
| 37 | #include <linux/smp.h> |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 38 | #include <linux/anon_inodes.h> |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 39 | #include <linux/profile.h> |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 40 | #include <linux/kvm_para.h> |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 41 | #include <linux/pagemap.h> |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 42 | #include <linux/mman.h> |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 43 | #include <linux/swap.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 44 | |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 45 | #include <asm/processor.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 46 | #include <asm/io.h> |
| 47 | #include <asm/uaccess.h> |
Izik Eidus | 3e021bf | 2007-11-19 11:16:57 +0200 | [diff] [blame] | 48 | #include <asm/pgtable.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 49 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 50 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 51 | #include "coalesced_mmio.h" |
| 52 | #endif |
| 53 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 54 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
| 55 | #include <linux/pci.h> |
| 56 | #include <linux/interrupt.h> |
| 57 | #include "irq.h" |
| 58 | #endif |
| 59 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 60 | MODULE_AUTHOR("Qumranet"); |
| 61 | MODULE_LICENSE("GPL"); |
| 62 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 63 | DEFINE_SPINLOCK(kvm_lock); |
| 64 | LIST_HEAD(vm_list); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 65 | |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 66 | static cpumask_t cpus_hardware_enabled; |
| 67 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 68 | struct kmem_cache *kvm_vcpu_cache; |
| 69 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 70 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 71 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
| 72 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 73 | struct dentry *kvm_debugfs_dir; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 74 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 75 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
| 76 | unsigned long arg); |
| 77 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 78 | bool kvm_rebooting; |
| 79 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 80 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
| 81 | static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, |
| 82 | int assigned_dev_id) |
| 83 | { |
| 84 | struct list_head *ptr; |
| 85 | struct kvm_assigned_dev_kernel *match; |
| 86 | |
| 87 | list_for_each(ptr, head) { |
| 88 | match = list_entry(ptr, struct kvm_assigned_dev_kernel, list); |
| 89 | if (match->assigned_dev_id == assigned_dev_id) |
| 90 | return match; |
| 91 | } |
| 92 | return NULL; |
| 93 | } |
| 94 | |
| 95 | static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) |
| 96 | { |
| 97 | struct kvm_assigned_dev_kernel *assigned_dev; |
| 98 | |
| 99 | assigned_dev = container_of(work, struct kvm_assigned_dev_kernel, |
| 100 | interrupt_work); |
| 101 | |
| 102 | /* This is taken to safely inject irq inside the guest. When |
| 103 | * the interrupt injection (or the ioapic code) uses a |
| 104 | * finer-grained lock, update this |
| 105 | */ |
| 106 | mutex_lock(&assigned_dev->kvm->lock); |
| 107 | kvm_set_irq(assigned_dev->kvm, |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 108 | assigned_dev->irq_source_id, |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 109 | assigned_dev->guest_irq, 1); |
| 110 | mutex_unlock(&assigned_dev->kvm->lock); |
| 111 | kvm_put_kvm(assigned_dev->kvm); |
| 112 | } |
| 113 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 114 | static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) |
| 115 | { |
| 116 | struct kvm_assigned_dev_kernel *assigned_dev = |
| 117 | (struct kvm_assigned_dev_kernel *) dev_id; |
| 118 | |
| 119 | kvm_get_kvm(assigned_dev->kvm); |
| 120 | schedule_work(&assigned_dev->interrupt_work); |
| 121 | disable_irq_nosync(irq); |
| 122 | return IRQ_HANDLED; |
| 123 | } |
| 124 | |
| 125 | /* Ack the irq line for an assigned device */ |
| 126 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) |
| 127 | { |
| 128 | struct kvm_assigned_dev_kernel *dev; |
| 129 | |
| 130 | if (kian->gsi == -1) |
| 131 | return; |
| 132 | |
| 133 | dev = container_of(kian, struct kvm_assigned_dev_kernel, |
| 134 | ack_notifier); |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 135 | kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 136 | enable_irq(dev->host_irq); |
| 137 | } |
| 138 | |
| 139 | static void kvm_free_assigned_device(struct kvm *kvm, |
| 140 | struct kvm_assigned_dev_kernel |
| 141 | *assigned_dev) |
| 142 | { |
Sheng Yang | 4f906c1 | 2008-11-24 14:32:51 +0800 | [diff] [blame^] | 143 | if (irqchip_in_kernel(kvm) && assigned_dev->irq_requested_type) |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 144 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); |
| 145 | |
Sheng Yang | e19e30e | 2008-10-20 16:07:10 +0800 | [diff] [blame] | 146 | kvm_unregister_irq_ack_notifier(&assigned_dev->ack_notifier); |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 147 | kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 148 | |
| 149 | if (cancel_work_sync(&assigned_dev->interrupt_work)) |
| 150 | /* We had pending work. That means we will have to take |
| 151 | * care of kvm_put_kvm. |
| 152 | */ |
| 153 | kvm_put_kvm(kvm); |
| 154 | |
Sheng Yang | 6eb5581 | 2008-10-31 12:37:41 +0800 | [diff] [blame] | 155 | pci_reset_function(assigned_dev->dev); |
| 156 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 157 | pci_release_regions(assigned_dev->dev); |
| 158 | pci_disable_device(assigned_dev->dev); |
| 159 | pci_dev_put(assigned_dev->dev); |
| 160 | |
| 161 | list_del(&assigned_dev->list); |
| 162 | kfree(assigned_dev); |
| 163 | } |
| 164 | |
| 165 | void kvm_free_all_assigned_devices(struct kvm *kvm) |
| 166 | { |
| 167 | struct list_head *ptr, *ptr2; |
| 168 | struct kvm_assigned_dev_kernel *assigned_dev; |
| 169 | |
| 170 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { |
| 171 | assigned_dev = list_entry(ptr, |
| 172 | struct kvm_assigned_dev_kernel, |
| 173 | list); |
| 174 | |
| 175 | kvm_free_assigned_device(kvm, assigned_dev); |
| 176 | } |
| 177 | } |
| 178 | |
Sheng Yang | 00e3ed3 | 2008-11-24 14:32:50 +0800 | [diff] [blame] | 179 | static int assigned_device_update_intx(struct kvm *kvm, |
| 180 | struct kvm_assigned_dev_kernel *adev, |
| 181 | struct kvm_assigned_irq *airq) |
| 182 | { |
Sheng Yang | 4f906c1 | 2008-11-24 14:32:51 +0800 | [diff] [blame^] | 183 | if (adev->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_INTX) { |
Sheng Yang | 00e3ed3 | 2008-11-24 14:32:50 +0800 | [diff] [blame] | 184 | adev->guest_irq = airq->guest_irq; |
| 185 | adev->ack_notifier.gsi = airq->guest_irq; |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | if (irqchip_in_kernel(kvm)) { |
| 190 | if (!capable(CAP_SYS_RAWIO)) |
| 191 | return -EPERM; |
| 192 | |
| 193 | if (airq->host_irq) |
| 194 | adev->host_irq = airq->host_irq; |
| 195 | else |
| 196 | adev->host_irq = adev->dev->irq; |
| 197 | adev->guest_irq = airq->guest_irq; |
| 198 | adev->ack_notifier.gsi = airq->guest_irq; |
| 199 | |
| 200 | /* Even though this is PCI, we don't want to use shared |
| 201 | * interrupts. Sharing host devices with guest-assigned devices |
| 202 | * on the same interrupt line is not a happy situation: there |
| 203 | * are going to be long delays in accepting, acking, etc. |
| 204 | */ |
| 205 | if (request_irq(adev->host_irq, kvm_assigned_dev_intr, |
| 206 | 0, "kvm_assigned_intx_device", (void *)adev)) |
| 207 | return -EIO; |
| 208 | } |
| 209 | |
Sheng Yang | 4f906c1 | 2008-11-24 14:32:51 +0800 | [diff] [blame^] | 210 | adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_INTX | |
| 211 | KVM_ASSIGNED_DEV_HOST_INTX; |
Sheng Yang | 00e3ed3 | 2008-11-24 14:32:50 +0800 | [diff] [blame] | 212 | return 0; |
| 213 | } |
| 214 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 215 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, |
| 216 | struct kvm_assigned_irq |
| 217 | *assigned_irq) |
| 218 | { |
| 219 | int r = 0; |
| 220 | struct kvm_assigned_dev_kernel *match; |
| 221 | |
| 222 | mutex_lock(&kvm->lock); |
| 223 | |
| 224 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, |
| 225 | assigned_irq->assigned_dev_id); |
| 226 | if (!match) { |
| 227 | mutex_unlock(&kvm->lock); |
| 228 | return -EINVAL; |
| 229 | } |
| 230 | |
Sheng Yang | 4f906c1 | 2008-11-24 14:32:51 +0800 | [diff] [blame^] | 231 | if (!match->irq_requested_type) { |
Sheng Yang | 342ffb9 | 2008-11-24 14:32:49 +0800 | [diff] [blame] | 232 | INIT_WORK(&match->interrupt_work, |
| 233 | kvm_assigned_dev_interrupt_work_handler); |
| 234 | if (irqchip_in_kernel(kvm)) { |
| 235 | /* Register ack nofitier */ |
| 236 | match->ack_notifier.gsi = -1; |
| 237 | match->ack_notifier.irq_acked = |
| 238 | kvm_assigned_dev_ack_irq; |
| 239 | kvm_register_irq_ack_notifier(kvm, |
| 240 | &match->ack_notifier); |
| 241 | |
| 242 | /* Request IRQ source ID */ |
| 243 | r = kvm_request_irq_source_id(kvm); |
| 244 | if (r < 0) |
| 245 | goto out_release; |
| 246 | else |
| 247 | match->irq_source_id = r; |
| 248 | } |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 249 | } |
| 250 | |
Sheng Yang | 00e3ed3 | 2008-11-24 14:32:50 +0800 | [diff] [blame] | 251 | r = assigned_device_update_intx(kvm, match, assigned_irq); |
| 252 | if (r) |
| 253 | goto out_release; |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 254 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 255 | mutex_unlock(&kvm->lock); |
| 256 | return r; |
| 257 | out_release: |
| 258 | mutex_unlock(&kvm->lock); |
| 259 | kvm_free_assigned_device(kvm, match); |
| 260 | return r; |
| 261 | } |
| 262 | |
| 263 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, |
| 264 | struct kvm_assigned_pci_dev *assigned_dev) |
| 265 | { |
| 266 | int r = 0; |
| 267 | struct kvm_assigned_dev_kernel *match; |
| 268 | struct pci_dev *dev; |
| 269 | |
| 270 | mutex_lock(&kvm->lock); |
| 271 | |
| 272 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, |
| 273 | assigned_dev->assigned_dev_id); |
| 274 | if (match) { |
| 275 | /* device already assigned */ |
| 276 | r = -EINVAL; |
| 277 | goto out; |
| 278 | } |
| 279 | |
| 280 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); |
| 281 | if (match == NULL) { |
| 282 | printk(KERN_INFO "%s: Couldn't allocate memory\n", |
| 283 | __func__); |
| 284 | r = -ENOMEM; |
| 285 | goto out; |
| 286 | } |
| 287 | dev = pci_get_bus_and_slot(assigned_dev->busnr, |
| 288 | assigned_dev->devfn); |
| 289 | if (!dev) { |
| 290 | printk(KERN_INFO "%s: host device not found\n", __func__); |
| 291 | r = -EINVAL; |
| 292 | goto out_free; |
| 293 | } |
| 294 | if (pci_enable_device(dev)) { |
| 295 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); |
| 296 | r = -EBUSY; |
| 297 | goto out_put; |
| 298 | } |
| 299 | r = pci_request_regions(dev, "kvm_assigned_device"); |
| 300 | if (r) { |
| 301 | printk(KERN_INFO "%s: Could not get access to device regions\n", |
| 302 | __func__); |
| 303 | goto out_disable; |
| 304 | } |
Sheng Yang | 6eb5581 | 2008-10-31 12:37:41 +0800 | [diff] [blame] | 305 | |
| 306 | pci_reset_function(dev); |
| 307 | |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 308 | match->assigned_dev_id = assigned_dev->assigned_dev_id; |
| 309 | match->host_busnr = assigned_dev->busnr; |
| 310 | match->host_devfn = assigned_dev->devfn; |
| 311 | match->dev = dev; |
| 312 | |
| 313 | match->kvm = kvm; |
| 314 | |
| 315 | list_add(&match->list, &kvm->arch.assigned_dev_head); |
| 316 | |
| 317 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { |
| 318 | r = kvm_iommu_map_guest(kvm, match); |
| 319 | if (r) |
| 320 | goto out_list_del; |
| 321 | } |
| 322 | |
| 323 | out: |
| 324 | mutex_unlock(&kvm->lock); |
| 325 | return r; |
| 326 | out_list_del: |
| 327 | list_del(&match->list); |
| 328 | pci_release_regions(dev); |
| 329 | out_disable: |
| 330 | pci_disable_device(dev); |
| 331 | out_put: |
| 332 | pci_dev_put(dev); |
| 333 | out_free: |
| 334 | kfree(match); |
| 335 | mutex_unlock(&kvm->lock); |
| 336 | return r; |
| 337 | } |
| 338 | #endif |
| 339 | |
James Morris | 5aacf0c | 2006-12-22 01:04:55 -0800 | [diff] [blame] | 340 | static inline int valid_vcpu(int n) |
| 341 | { |
| 342 | return likely(n >= 0 && n < KVM_MAX_VCPUS); |
| 343 | } |
| 344 | |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 345 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 346 | { |
| 347 | if (pfn_valid(pfn)) |
| 348 | return PageReserved(pfn_to_page(pfn)); |
| 349 | |
| 350 | return true; |
| 351 | } |
| 352 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 353 | /* |
| 354 | * Switches to specified vcpu, until a matching vcpu_put() |
| 355 | */ |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 356 | void vcpu_load(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 357 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 358 | int cpu; |
| 359 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 360 | mutex_lock(&vcpu->mutex); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 361 | cpu = get_cpu(); |
| 362 | preempt_notifier_register(&vcpu->preempt_notifier); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 363 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 364 | put_cpu(); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 365 | } |
| 366 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 367 | void vcpu_put(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 368 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 369 | preempt_disable(); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 370 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 371 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
| 372 | preempt_enable(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 373 | mutex_unlock(&vcpu->mutex); |
| 374 | } |
| 375 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 376 | static void ack_flush(void *_completed) |
| 377 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
| 381 | { |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 382 | int i, cpu, me; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 383 | cpumask_t cpus; |
| 384 | struct kvm_vcpu *vcpu; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 385 | |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 386 | me = get_cpu(); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 387 | cpus_clear(cpus); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 388 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 389 | vcpu = kvm->vcpus[i]; |
| 390 | if (!vcpu) |
| 391 | continue; |
Avi Kivity | 3176bc3 | 2007-10-16 17:22:08 +0200 | [diff] [blame] | 392 | if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 393 | continue; |
| 394 | cpu = vcpu->cpu; |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 395 | if (cpu != -1 && cpu != me) |
Laurent Vivier | 49d3bd7 | 2007-10-22 16:33:07 +0200 | [diff] [blame] | 396 | cpu_set(cpu, cpus); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 397 | } |
Avi Kivity | 0f74a24 | 2007-11-20 23:01:14 +0200 | [diff] [blame] | 398 | if (cpus_empty(cpus)) |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 399 | goto out; |
Avi Kivity | 0f74a24 | 2007-11-20 23:01:14 +0200 | [diff] [blame] | 400 | ++kvm->stat.remote_tlb_flush; |
Laurent Vivier | 49d3bd7 | 2007-10-22 16:33:07 +0200 | [diff] [blame] | 401 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 402 | out: |
| 403 | put_cpu(); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 404 | } |
| 405 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 406 | void kvm_reload_remote_mmus(struct kvm *kvm) |
| 407 | { |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 408 | int i, cpu, me; |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 409 | cpumask_t cpus; |
| 410 | struct kvm_vcpu *vcpu; |
| 411 | |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 412 | me = get_cpu(); |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 413 | cpus_clear(cpus); |
| 414 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 415 | vcpu = kvm->vcpus[i]; |
| 416 | if (!vcpu) |
| 417 | continue; |
| 418 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) |
| 419 | continue; |
| 420 | cpu = vcpu->cpu; |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 421 | if (cpu != -1 && cpu != me) |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 422 | cpu_set(cpu, cpus); |
| 423 | } |
| 424 | if (cpus_empty(cpus)) |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 425 | goto out; |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 426 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 427 | out: |
| 428 | put_cpu(); |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 432 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
| 433 | { |
| 434 | struct page *page; |
| 435 | int r; |
| 436 | |
| 437 | mutex_init(&vcpu->mutex); |
| 438 | vcpu->cpu = -1; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 439 | vcpu->kvm = kvm; |
| 440 | vcpu->vcpu_id = id; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 441 | init_waitqueue_head(&vcpu->wq); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 442 | |
| 443 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 444 | if (!page) { |
| 445 | r = -ENOMEM; |
| 446 | goto fail; |
| 447 | } |
| 448 | vcpu->run = page_address(page); |
| 449 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 450 | r = kvm_arch_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 451 | if (r < 0) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 452 | goto fail_free_run; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 453 | return 0; |
| 454 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 455 | fail_free_run: |
| 456 | free_page((unsigned long)vcpu->run); |
| 457 | fail: |
Rusty Russell | 76fafa5 | 2007-10-08 10:50:48 +1000 | [diff] [blame] | 458 | return r; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 459 | } |
| 460 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); |
| 461 | |
| 462 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 463 | { |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 464 | kvm_arch_vcpu_uninit(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 465 | free_page((unsigned long)vcpu->run); |
| 466 | } |
| 467 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); |
| 468 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 469 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 470 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) |
| 471 | { |
| 472 | return container_of(mn, struct kvm, mmu_notifier); |
| 473 | } |
| 474 | |
| 475 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, |
| 476 | struct mm_struct *mm, |
| 477 | unsigned long address) |
| 478 | { |
| 479 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 480 | int need_tlb_flush; |
| 481 | |
| 482 | /* |
| 483 | * When ->invalidate_page runs, the linux pte has been zapped |
| 484 | * already but the page is still allocated until |
| 485 | * ->invalidate_page returns. So if we increase the sequence |
| 486 | * here the kvm page fault will notice if the spte can't be |
| 487 | * established because the page is going to be freed. If |
| 488 | * instead the kvm page fault establishes the spte before |
| 489 | * ->invalidate_page runs, kvm_unmap_hva will release it |
| 490 | * before returning. |
| 491 | * |
| 492 | * The sequence increase only need to be seen at spin_unlock |
| 493 | * time, and not at spin_lock time. |
| 494 | * |
| 495 | * Increasing the sequence after the spin_unlock would be |
| 496 | * unsafe because the kvm page fault could then establish the |
| 497 | * pte after kvm_unmap_hva returned, without noticing the page |
| 498 | * is going to be freed. |
| 499 | */ |
| 500 | spin_lock(&kvm->mmu_lock); |
| 501 | kvm->mmu_notifier_seq++; |
| 502 | need_tlb_flush = kvm_unmap_hva(kvm, address); |
| 503 | spin_unlock(&kvm->mmu_lock); |
| 504 | |
| 505 | /* we've to flush the tlb before the pages can be freed */ |
| 506 | if (need_tlb_flush) |
| 507 | kvm_flush_remote_tlbs(kvm); |
| 508 | |
| 509 | } |
| 510 | |
| 511 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
| 512 | struct mm_struct *mm, |
| 513 | unsigned long start, |
| 514 | unsigned long end) |
| 515 | { |
| 516 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 517 | int need_tlb_flush = 0; |
| 518 | |
| 519 | spin_lock(&kvm->mmu_lock); |
| 520 | /* |
| 521 | * The count increase must become visible at unlock time as no |
| 522 | * spte can be established without taking the mmu_lock and |
| 523 | * count is also read inside the mmu_lock critical section. |
| 524 | */ |
| 525 | kvm->mmu_notifier_count++; |
| 526 | for (; start < end; start += PAGE_SIZE) |
| 527 | need_tlb_flush |= kvm_unmap_hva(kvm, start); |
| 528 | spin_unlock(&kvm->mmu_lock); |
| 529 | |
| 530 | /* we've to flush the tlb before the pages can be freed */ |
| 531 | if (need_tlb_flush) |
| 532 | kvm_flush_remote_tlbs(kvm); |
| 533 | } |
| 534 | |
| 535 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, |
| 536 | struct mm_struct *mm, |
| 537 | unsigned long start, |
| 538 | unsigned long end) |
| 539 | { |
| 540 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 541 | |
| 542 | spin_lock(&kvm->mmu_lock); |
| 543 | /* |
| 544 | * This sequence increase will notify the kvm page fault that |
| 545 | * the page that is going to be mapped in the spte could have |
| 546 | * been freed. |
| 547 | */ |
| 548 | kvm->mmu_notifier_seq++; |
| 549 | /* |
| 550 | * The above sequence increase must be visible before the |
| 551 | * below count decrease but both values are read by the kvm |
| 552 | * page fault under mmu_lock spinlock so we don't need to add |
| 553 | * a smb_wmb() here in between the two. |
| 554 | */ |
| 555 | kvm->mmu_notifier_count--; |
| 556 | spin_unlock(&kvm->mmu_lock); |
| 557 | |
| 558 | BUG_ON(kvm->mmu_notifier_count < 0); |
| 559 | } |
| 560 | |
| 561 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, |
| 562 | struct mm_struct *mm, |
| 563 | unsigned long address) |
| 564 | { |
| 565 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 566 | int young; |
| 567 | |
| 568 | spin_lock(&kvm->mmu_lock); |
| 569 | young = kvm_age_hva(kvm, address); |
| 570 | spin_unlock(&kvm->mmu_lock); |
| 571 | |
| 572 | if (young) |
| 573 | kvm_flush_remote_tlbs(kvm); |
| 574 | |
| 575 | return young; |
| 576 | } |
| 577 | |
| 578 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
| 579 | .invalidate_page = kvm_mmu_notifier_invalidate_page, |
| 580 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, |
| 581 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, |
| 582 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, |
| 583 | }; |
| 584 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
| 585 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 586 | static struct kvm *kvm_create_vm(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 587 | { |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 588 | struct kvm *kvm = kvm_arch_create_vm(); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 589 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 590 | struct page *page; |
| 591 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 592 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 593 | if (IS_ERR(kvm)) |
| 594 | goto out; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 595 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 596 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 597 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 598 | if (!page) { |
| 599 | kfree(kvm); |
| 600 | return ERR_PTR(-ENOMEM); |
| 601 | } |
| 602 | kvm->coalesced_mmio_ring = |
| 603 | (struct kvm_coalesced_mmio_ring *)page_address(page); |
| 604 | #endif |
| 605 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 606 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 607 | { |
| 608 | int err; |
| 609 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; |
| 610 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); |
| 611 | if (err) { |
| 612 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 613 | put_page(page); |
| 614 | #endif |
| 615 | kfree(kvm); |
| 616 | return ERR_PTR(err); |
| 617 | } |
| 618 | } |
| 619 | #endif |
| 620 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 621 | kvm->mm = current->mm; |
| 622 | atomic_inc(&kvm->mm->mm_count); |
Marcelo Tosatti | aaee2c9 | 2007-12-20 19:18:26 -0500 | [diff] [blame] | 623 | spin_lock_init(&kvm->mmu_lock); |
Eddie Dong | 7490634 | 2007-06-19 18:05:03 +0300 | [diff] [blame] | 624 | kvm_io_bus_init(&kvm->pio_bus); |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 625 | mutex_init(&kvm->lock); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 626 | kvm_io_bus_init(&kvm->mmio_bus); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 627 | init_rwsem(&kvm->slots_lock); |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 628 | atomic_set(&kvm->users_count, 1); |
Rusty Russell | 5e58cfe | 2007-07-23 17:08:21 +1000 | [diff] [blame] | 629 | spin_lock(&kvm_lock); |
| 630 | list_add(&kvm->vm_list, &vm_list); |
| 631 | spin_unlock(&kvm_lock); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 632 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 633 | kvm_coalesced_mmio_init(kvm); |
| 634 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 635 | out: |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 636 | return kvm; |
| 637 | } |
| 638 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 639 | /* |
| 640 | * Free any memory in @free but not in @dont. |
| 641 | */ |
| 642 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, |
| 643 | struct kvm_memory_slot *dont) |
| 644 | { |
Izik Eidus | 290fc38 | 2007-09-27 14:11:22 +0200 | [diff] [blame] | 645 | if (!dont || free->rmap != dont->rmap) |
| 646 | vfree(free->rmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 647 | |
| 648 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) |
| 649 | vfree(free->dirty_bitmap); |
| 650 | |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 651 | if (!dont || free->lpage_info != dont->lpage_info) |
| 652 | vfree(free->lpage_info); |
| 653 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 654 | free->npages = 0; |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 655 | free->dirty_bitmap = NULL; |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 656 | free->rmap = NULL; |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 657 | free->lpage_info = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 658 | } |
| 659 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 660 | void kvm_free_physmem(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 661 | { |
| 662 | int i; |
| 663 | |
| 664 | for (i = 0; i < kvm->nmemslots; ++i) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 665 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 666 | } |
| 667 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 668 | static void kvm_destroy_vm(struct kvm *kvm) |
| 669 | { |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 670 | struct mm_struct *mm = kvm->mm; |
| 671 | |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 672 | spin_lock(&kvm_lock); |
| 673 | list_del(&kvm->vm_list); |
| 674 | spin_unlock(&kvm_lock); |
Eddie Dong | 7490634 | 2007-06-19 18:05:03 +0300 | [diff] [blame] | 675 | kvm_io_bus_destroy(&kvm->pio_bus); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 676 | kvm_io_bus_destroy(&kvm->mmio_bus); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 677 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 678 | if (kvm->coalesced_mmio_ring != NULL) |
| 679 | free_page((unsigned long)kvm->coalesced_mmio_ring); |
| 680 | #endif |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 681 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 682 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); |
| 683 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 684 | kvm_arch_destroy_vm(kvm); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 685 | mmdrop(mm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 686 | } |
| 687 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 688 | void kvm_get_kvm(struct kvm *kvm) |
| 689 | { |
| 690 | atomic_inc(&kvm->users_count); |
| 691 | } |
| 692 | EXPORT_SYMBOL_GPL(kvm_get_kvm); |
| 693 | |
| 694 | void kvm_put_kvm(struct kvm *kvm) |
| 695 | { |
| 696 | if (atomic_dec_and_test(&kvm->users_count)) |
| 697 | kvm_destroy_vm(kvm); |
| 698 | } |
| 699 | EXPORT_SYMBOL_GPL(kvm_put_kvm); |
| 700 | |
| 701 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 702 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
| 703 | { |
| 704 | struct kvm *kvm = filp->private_data; |
| 705 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 706 | kvm_put_kvm(kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 707 | return 0; |
| 708 | } |
| 709 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 710 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 711 | * Allocate some memory and give it an address in the guest physical address |
| 712 | * space. |
| 713 | * |
| 714 | * Discontiguous memory is allowed, mostly for framebuffers. |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 715 | * |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 716 | * Must be called holding mmap_sem for write. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 717 | */ |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 718 | int __kvm_set_memory_region(struct kvm *kvm, |
| 719 | struct kvm_userspace_memory_region *mem, |
| 720 | int user_alloc) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 721 | { |
| 722 | int r; |
| 723 | gfn_t base_gfn; |
| 724 | unsigned long npages; |
| 725 | unsigned long i; |
| 726 | struct kvm_memory_slot *memslot; |
| 727 | struct kvm_memory_slot old, new; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 728 | |
| 729 | r = -EINVAL; |
| 730 | /* General sanity checks */ |
| 731 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 732 | goto out; |
| 733 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) |
| 734 | goto out; |
Sheng Yang | e7cacd4 | 2008-11-11 15:30:40 +0800 | [diff] [blame] | 735 | if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) |
Hollis Blanchard | 7874980 | 2008-11-07 13:32:12 -0600 | [diff] [blame] | 736 | goto out; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 737 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 738 | goto out; |
| 739 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) |
| 740 | goto out; |
| 741 | |
| 742 | memslot = &kvm->memslots[mem->slot]; |
| 743 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
| 744 | npages = mem->memory_size >> PAGE_SHIFT; |
| 745 | |
| 746 | if (!npages) |
| 747 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; |
| 748 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 749 | new = old = *memslot; |
| 750 | |
| 751 | new.base_gfn = base_gfn; |
| 752 | new.npages = npages; |
| 753 | new.flags = mem->flags; |
| 754 | |
| 755 | /* Disallow changing a memory slot's size. */ |
| 756 | r = -EINVAL; |
| 757 | if (npages && old.npages && npages != old.npages) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 758 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 759 | |
| 760 | /* Check for overlaps */ |
| 761 | r = -EEXIST; |
| 762 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { |
| 763 | struct kvm_memory_slot *s = &kvm->memslots[i]; |
| 764 | |
| 765 | if (s == memslot) |
| 766 | continue; |
| 767 | if (!((base_gfn + npages <= s->base_gfn) || |
| 768 | (base_gfn >= s->base_gfn + s->npages))) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 769 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 770 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 771 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 772 | /* Free page dirty bitmap if unneeded */ |
| 773 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 774 | new.dirty_bitmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 775 | |
| 776 | r = -ENOMEM; |
| 777 | |
| 778 | /* Allocate if a slot is being created */ |
Carsten Otte | eff0114 | 2008-06-27 15:05:31 +0200 | [diff] [blame] | 779 | #ifndef CONFIG_S390 |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 780 | if (npages && !new.rmap) { |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 781 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
Izik Eidus | 290fc38 | 2007-09-27 14:11:22 +0200 | [diff] [blame] | 782 | |
| 783 | if (!new.rmap) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 784 | goto out_free; |
Izik Eidus | 290fc38 | 2007-09-27 14:11:22 +0200 | [diff] [blame] | 785 | |
Izik Eidus | 290fc38 | 2007-09-27 14:11:22 +0200 | [diff] [blame] | 786 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 787 | |
Izik Eidus | 80b14b5 | 2007-10-25 11:54:04 +0200 | [diff] [blame] | 788 | new.user_alloc = user_alloc; |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 789 | /* |
| 790 | * hva_to_rmmap() serialzies with the mmu_lock and to be |
| 791 | * safe it has to ignore memslots with !user_alloc && |
| 792 | * !userspace_addr. |
| 793 | */ |
| 794 | if (user_alloc) |
| 795 | new.userspace_addr = mem->userspace_addr; |
| 796 | else |
| 797 | new.userspace_addr = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 798 | } |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 799 | if (npages && !new.lpage_info) { |
| 800 | int largepages = npages / KVM_PAGES_PER_HPAGE; |
| 801 | if (npages % KVM_PAGES_PER_HPAGE) |
| 802 | largepages++; |
| 803 | if (base_gfn % KVM_PAGES_PER_HPAGE) |
| 804 | largepages++; |
| 805 | |
| 806 | new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info)); |
| 807 | |
| 808 | if (!new.lpage_info) |
| 809 | goto out_free; |
| 810 | |
| 811 | memset(new.lpage_info, 0, largepages * sizeof(*new.lpage_info)); |
| 812 | |
| 813 | if (base_gfn % KVM_PAGES_PER_HPAGE) |
| 814 | new.lpage_info[0].write_count = 1; |
| 815 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE) |
| 816 | new.lpage_info[largepages-1].write_count = 1; |
| 817 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 818 | |
| 819 | /* Allocate page dirty bitmap if needed */ |
| 820 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { |
| 821 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; |
| 822 | |
| 823 | new.dirty_bitmap = vmalloc(dirty_bytes); |
| 824 | if (!new.dirty_bitmap) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 825 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 826 | memset(new.dirty_bitmap, 0, dirty_bytes); |
| 827 | } |
Carsten Otte | eff0114 | 2008-06-27 15:05:31 +0200 | [diff] [blame] | 828 | #endif /* not defined CONFIG_S390 */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 829 | |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 830 | if (!npages) |
| 831 | kvm_arch_flush_shadow(kvm); |
| 832 | |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 833 | spin_lock(&kvm->mmu_lock); |
| 834 | if (mem->slot >= kvm->nmemslots) |
| 835 | kvm->nmemslots = mem->slot + 1; |
| 836 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 837 | *memslot = new; |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 838 | spin_unlock(&kvm->mmu_lock); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 839 | |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 840 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
| 841 | if (r) { |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 842 | spin_lock(&kvm->mmu_lock); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 843 | *memslot = old; |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 844 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 845 | goto out_free; |
Zhang Xiantao | 3ad82a7 | 2007-11-20 13:11:38 +0800 | [diff] [blame] | 846 | } |
| 847 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 848 | kvm_free_physmem_slot(&old, &new); |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 849 | #ifdef CONFIG_DMAR |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 850 | /* map the pages in iommu page table */ |
| 851 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); |
| 852 | if (r) |
| 853 | goto out; |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 854 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 855 | return 0; |
| 856 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 857 | out_free: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 858 | kvm_free_physmem_slot(&new, &old); |
| 859 | out: |
| 860 | return r; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 861 | |
| 862 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 863 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
| 864 | |
| 865 | int kvm_set_memory_region(struct kvm *kvm, |
| 866 | struct kvm_userspace_memory_region *mem, |
| 867 | int user_alloc) |
| 868 | { |
| 869 | int r; |
| 870 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 871 | down_write(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 872 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 873 | up_write(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 874 | return r; |
| 875 | } |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 876 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
| 877 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 878 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
| 879 | struct |
| 880 | kvm_userspace_memory_region *mem, |
| 881 | int user_alloc) |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 882 | { |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 883 | if (mem->slot >= KVM_MEMORY_SLOTS) |
| 884 | return -EINVAL; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 885 | return kvm_set_memory_region(kvm, mem, user_alloc); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 886 | } |
| 887 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 888 | int kvm_get_dirty_log(struct kvm *kvm, |
| 889 | struct kvm_dirty_log *log, int *is_dirty) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 890 | { |
| 891 | struct kvm_memory_slot *memslot; |
| 892 | int r, i; |
| 893 | int n; |
| 894 | unsigned long any = 0; |
| 895 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 896 | r = -EINVAL; |
| 897 | if (log->slot >= KVM_MEMORY_SLOTS) |
| 898 | goto out; |
| 899 | |
| 900 | memslot = &kvm->memslots[log->slot]; |
| 901 | r = -ENOENT; |
| 902 | if (!memslot->dirty_bitmap) |
| 903 | goto out; |
| 904 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 905 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 906 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 907 | for (i = 0; !any && i < n/sizeof(long); ++i) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 908 | any = memslot->dirty_bitmap[i]; |
| 909 | |
| 910 | r = -EFAULT; |
| 911 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 912 | goto out; |
| 913 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 914 | if (any) |
| 915 | *is_dirty = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 916 | |
| 917 | r = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 918 | out: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 919 | return r; |
| 920 | } |
| 921 | |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 922 | int is_error_page(struct page *page) |
| 923 | { |
| 924 | return page == bad_page; |
| 925 | } |
| 926 | EXPORT_SYMBOL_GPL(is_error_page); |
| 927 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 928 | int is_error_pfn(pfn_t pfn) |
| 929 | { |
| 930 | return pfn == bad_pfn; |
| 931 | } |
| 932 | EXPORT_SYMBOL_GPL(is_error_pfn); |
| 933 | |
Izik Eidus | f9d46eb | 2007-11-11 22:02:22 +0200 | [diff] [blame] | 934 | static inline unsigned long bad_hva(void) |
| 935 | { |
| 936 | return PAGE_OFFSET; |
| 937 | } |
| 938 | |
| 939 | int kvm_is_error_hva(unsigned long addr) |
| 940 | { |
| 941 | return addr == bad_hva(); |
| 942 | } |
| 943 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); |
| 944 | |
Izik Eidus | 2843099 | 2008-10-03 17:40:32 +0300 | [diff] [blame] | 945 | struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 946 | { |
| 947 | int i; |
| 948 | |
| 949 | for (i = 0; i < kvm->nmemslots; ++i) { |
| 950 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; |
| 951 | |
| 952 | if (gfn >= memslot->base_gfn |
| 953 | && gfn < memslot->base_gfn + memslot->npages) |
| 954 | return memslot; |
| 955 | } |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 956 | return NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 957 | } |
Izik Eidus | 2843099 | 2008-10-03 17:40:32 +0300 | [diff] [blame] | 958 | EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); |
Avi Kivity | e820754 | 2007-03-30 16:54:30 +0300 | [diff] [blame] | 959 | |
| 960 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
| 961 | { |
| 962 | gfn = unalias_gfn(kvm, gfn); |
Izik Eidus | 2843099 | 2008-10-03 17:40:32 +0300 | [diff] [blame] | 963 | return gfn_to_memslot_unaliased(kvm, gfn); |
Avi Kivity | e820754 | 2007-03-30 16:54:30 +0300 | [diff] [blame] | 964 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 965 | |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 966 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
| 967 | { |
| 968 | int i; |
| 969 | |
| 970 | gfn = unalias_gfn(kvm, gfn); |
| 971 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { |
| 972 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; |
| 973 | |
| 974 | if (gfn >= memslot->base_gfn |
| 975 | && gfn < memslot->base_gfn + memslot->npages) |
| 976 | return 1; |
| 977 | } |
| 978 | return 0; |
| 979 | } |
| 980 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); |
| 981 | |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 982 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 983 | { |
| 984 | struct kvm_memory_slot *slot; |
| 985 | |
| 986 | gfn = unalias_gfn(kvm, gfn); |
Izik Eidus | 2843099 | 2008-10-03 17:40:32 +0300 | [diff] [blame] | 987 | slot = gfn_to_memslot_unaliased(kvm, gfn); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 988 | if (!slot) |
| 989 | return bad_hva(); |
| 990 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); |
| 991 | } |
Sheng Yang | 0d15029 | 2008-04-25 21:44:50 +0800 | [diff] [blame] | 992 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 993 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 994 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 995 | { |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 996 | struct page *page[1]; |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 997 | unsigned long addr; |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 998 | int npages; |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 999 | pfn_t pfn; |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1000 | |
Avi Kivity | 6039522 | 2007-10-21 11:03:36 +0200 | [diff] [blame] | 1001 | might_sleep(); |
| 1002 | |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1003 | addr = gfn_to_hva(kvm, gfn); |
| 1004 | if (kvm_is_error_hva(addr)) { |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1005 | get_page(bad_page); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1006 | return page_to_pfn(bad_page); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1007 | } |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1008 | |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1009 | npages = get_user_pages_fast(addr, 1, 1, page); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1010 | |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1011 | if (unlikely(npages != 1)) { |
| 1012 | struct vm_area_struct *vma; |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1013 | |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1014 | down_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1015 | vma = find_vma(current->mm, addr); |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1016 | |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1017 | if (vma == NULL || addr < vma->vm_start || |
| 1018 | !(vma->vm_flags & VM_PFNMAP)) { |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1019 | up_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1020 | get_page(bad_page); |
| 1021 | return page_to_pfn(bad_page); |
| 1022 | } |
| 1023 | |
| 1024 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1025 | up_read(¤t->mm->mmap_sem); |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1026 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1027 | } else |
| 1028 | pfn = page_to_pfn(page[0]); |
| 1029 | |
| 1030 | return pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
| 1034 | |
| 1035 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
| 1036 | { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1037 | pfn_t pfn; |
| 1038 | |
| 1039 | pfn = gfn_to_pfn(kvm, gfn); |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1040 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1041 | return pfn_to_page(pfn); |
| 1042 | |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1043 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1044 | |
| 1045 | get_page(bad_page); |
| 1046 | return bad_page; |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1047 | } |
Anthony Liguori | aab61cc | 2007-10-29 15:15:20 -0500 | [diff] [blame] | 1048 | |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1049 | EXPORT_SYMBOL_GPL(gfn_to_page); |
| 1050 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1051 | void kvm_release_page_clean(struct page *page) |
| 1052 | { |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1053 | kvm_release_pfn_clean(page_to_pfn(page)); |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1054 | } |
| 1055 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); |
| 1056 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1057 | void kvm_release_pfn_clean(pfn_t pfn) |
| 1058 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1059 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1060 | put_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1061 | } |
| 1062 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |
| 1063 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1064 | void kvm_release_page_dirty(struct page *page) |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1065 | { |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1066 | kvm_release_pfn_dirty(page_to_pfn(page)); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1067 | } |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1068 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1069 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1070 | void kvm_release_pfn_dirty(pfn_t pfn) |
| 1071 | { |
| 1072 | kvm_set_pfn_dirty(pfn); |
| 1073 | kvm_release_pfn_clean(pfn); |
| 1074 | } |
| 1075 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); |
| 1076 | |
| 1077 | void kvm_set_page_dirty(struct page *page) |
| 1078 | { |
| 1079 | kvm_set_pfn_dirty(page_to_pfn(page)); |
| 1080 | } |
| 1081 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); |
| 1082 | |
| 1083 | void kvm_set_pfn_dirty(pfn_t pfn) |
| 1084 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1085 | if (!kvm_is_mmio_pfn(pfn)) { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1086 | struct page *page = pfn_to_page(pfn); |
| 1087 | if (!PageReserved(page)) |
| 1088 | SetPageDirty(page); |
| 1089 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1090 | } |
| 1091 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
| 1092 | |
| 1093 | void kvm_set_pfn_accessed(pfn_t pfn) |
| 1094 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1095 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1096 | mark_page_accessed(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1097 | } |
| 1098 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); |
| 1099 | |
| 1100 | void kvm_get_pfn(pfn_t pfn) |
| 1101 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1102 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1103 | get_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1104 | } |
| 1105 | EXPORT_SYMBOL_GPL(kvm_get_pfn); |
| 1106 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1107 | static int next_segment(unsigned long len, int offset) |
| 1108 | { |
| 1109 | if (len > PAGE_SIZE - offset) |
| 1110 | return PAGE_SIZE - offset; |
| 1111 | else |
| 1112 | return len; |
| 1113 | } |
| 1114 | |
| 1115 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
| 1116 | int len) |
| 1117 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1118 | int r; |
| 1119 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1120 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1121 | addr = gfn_to_hva(kvm, gfn); |
| 1122 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1123 | return -EFAULT; |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1124 | r = copy_from_user(data, (void __user *)addr + offset, len); |
| 1125 | if (r) |
| 1126 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1127 | return 0; |
| 1128 | } |
| 1129 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); |
| 1130 | |
| 1131 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) |
| 1132 | { |
| 1133 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1134 | int seg; |
| 1135 | int offset = offset_in_page(gpa); |
| 1136 | int ret; |
| 1137 | |
| 1138 | while ((seg = next_segment(len, offset)) != 0) { |
| 1139 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); |
| 1140 | if (ret < 0) |
| 1141 | return ret; |
| 1142 | offset = 0; |
| 1143 | len -= seg; |
| 1144 | data += seg; |
| 1145 | ++gfn; |
| 1146 | } |
| 1147 | return 0; |
| 1148 | } |
| 1149 | EXPORT_SYMBOL_GPL(kvm_read_guest); |
| 1150 | |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1151 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
| 1152 | unsigned long len) |
| 1153 | { |
| 1154 | int r; |
| 1155 | unsigned long addr; |
| 1156 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1157 | int offset = offset_in_page(gpa); |
| 1158 | |
| 1159 | addr = gfn_to_hva(kvm, gfn); |
| 1160 | if (kvm_is_error_hva(addr)) |
| 1161 | return -EFAULT; |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1162 | pagefault_disable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1163 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1164 | pagefault_enable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1165 | if (r) |
| 1166 | return -EFAULT; |
| 1167 | return 0; |
| 1168 | } |
| 1169 | EXPORT_SYMBOL(kvm_read_guest_atomic); |
| 1170 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1171 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
| 1172 | int offset, int len) |
| 1173 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1174 | int r; |
| 1175 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1176 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1177 | addr = gfn_to_hva(kvm, gfn); |
| 1178 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1179 | return -EFAULT; |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1180 | r = copy_to_user((void __user *)addr + offset, data, len); |
| 1181 | if (r) |
| 1182 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1183 | mark_page_dirty(kvm, gfn); |
| 1184 | return 0; |
| 1185 | } |
| 1186 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); |
| 1187 | |
| 1188 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
| 1189 | unsigned long len) |
| 1190 | { |
| 1191 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1192 | int seg; |
| 1193 | int offset = offset_in_page(gpa); |
| 1194 | int ret; |
| 1195 | |
| 1196 | while ((seg = next_segment(len, offset)) != 0) { |
| 1197 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); |
| 1198 | if (ret < 0) |
| 1199 | return ret; |
| 1200 | offset = 0; |
| 1201 | len -= seg; |
| 1202 | data += seg; |
| 1203 | ++gfn; |
| 1204 | } |
| 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
| 1209 | { |
Izik Eidus | 3e021bf | 2007-11-19 11:16:57 +0200 | [diff] [blame] | 1210 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1211 | } |
| 1212 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); |
| 1213 | |
| 1214 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) |
| 1215 | { |
| 1216 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1217 | int seg; |
| 1218 | int offset = offset_in_page(gpa); |
| 1219 | int ret; |
| 1220 | |
| 1221 | while ((seg = next_segment(len, offset)) != 0) { |
| 1222 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); |
| 1223 | if (ret < 0) |
| 1224 | return ret; |
| 1225 | offset = 0; |
| 1226 | len -= seg; |
| 1227 | ++gfn; |
| 1228 | } |
| 1229 | return 0; |
| 1230 | } |
| 1231 | EXPORT_SYMBOL_GPL(kvm_clear_guest); |
| 1232 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1233 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
| 1234 | { |
Nguyen Anh Quynh | 3138994 | 2007-06-05 10:35:19 +0300 | [diff] [blame] | 1235 | struct kvm_memory_slot *memslot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1236 | |
Uri Lublin | 3b6fff1 | 2007-10-30 10:42:09 +0200 | [diff] [blame] | 1237 | gfn = unalias_gfn(kvm, gfn); |
Izik Eidus | 2843099 | 2008-10-03 17:40:32 +0300 | [diff] [blame] | 1238 | memslot = gfn_to_memslot_unaliased(kvm, gfn); |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1239 | if (memslot && memslot->dirty_bitmap) { |
| 1240 | unsigned long rel_gfn = gfn - memslot->base_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1241 | |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1242 | /* avoid RMW */ |
| 1243 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) |
| 1244 | set_bit(rel_gfn, memslot->dirty_bitmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1245 | } |
| 1246 | } |
| 1247 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1248 | /* |
| 1249 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. |
| 1250 | */ |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 1251 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1252 | { |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1253 | DEFINE_WAIT(wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1254 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1255 | for (;;) { |
| 1256 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1257 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 1258 | if (kvm_cpu_has_interrupt(vcpu) || |
| 1259 | kvm_cpu_has_pending_timer(vcpu) || |
| 1260 | kvm_arch_vcpu_runnable(vcpu)) { |
| 1261 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1262 | break; |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 1263 | } |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1264 | if (signal_pending(current)) |
| 1265 | break; |
| 1266 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1267 | vcpu_put(vcpu); |
| 1268 | schedule(); |
| 1269 | vcpu_load(vcpu); |
| 1270 | } |
| 1271 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1272 | finish_wait(&vcpu->wq, &wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1273 | } |
| 1274 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1275 | void kvm_resched(struct kvm_vcpu *vcpu) |
| 1276 | { |
Yaozu Dong | 3fca036 | 2007-04-25 16:49:19 +0300 | [diff] [blame] | 1277 | if (!need_resched()) |
| 1278 | return; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1279 | cond_resched(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1280 | } |
| 1281 | EXPORT_SYMBOL_GPL(kvm_resched); |
| 1282 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1283 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1284 | { |
| 1285 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1286 | struct page *page; |
| 1287 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1288 | if (vmf->pgoff == 0) |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1289 | page = virt_to_page(vcpu->run); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1290 | #ifdef CONFIG_X86 |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1291 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1292 | page = virt_to_page(vcpu->arch.pio_data); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1293 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1294 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1295 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) |
| 1296 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); |
| 1297 | #endif |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1298 | else |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1299 | return VM_FAULT_SIGBUS; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1300 | get_page(page); |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1301 | vmf->page = page; |
| 1302 | return 0; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1303 | } |
| 1304 | |
| 1305 | static struct vm_operations_struct kvm_vcpu_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1306 | .fault = kvm_vcpu_fault, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1307 | }; |
| 1308 | |
| 1309 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) |
| 1310 | { |
| 1311 | vma->vm_ops = &kvm_vcpu_vm_ops; |
| 1312 | return 0; |
| 1313 | } |
| 1314 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1315 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
| 1316 | { |
| 1317 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1318 | |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1319 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1320 | return 0; |
| 1321 | } |
| 1322 | |
Jan Engelhardt | 5c50274 | 2008-01-22 20:46:14 +0100 | [diff] [blame] | 1323 | static const struct file_operations kvm_vcpu_fops = { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1324 | .release = kvm_vcpu_release, |
| 1325 | .unlocked_ioctl = kvm_vcpu_ioctl, |
| 1326 | .compat_ioctl = kvm_vcpu_ioctl, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1327 | .mmap = kvm_vcpu_mmap, |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1328 | }; |
| 1329 | |
| 1330 | /* |
| 1331 | * Allocates an inode for the vcpu. |
| 1332 | */ |
| 1333 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) |
| 1334 | { |
Ulrich Drepper | 7d9dbca | 2008-07-23 21:29:22 -0700 | [diff] [blame] | 1335 | int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
Al Viro | 2030a42 | 2008-02-23 06:46:49 -0500 | [diff] [blame] | 1336 | if (fd < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1337 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1338 | return fd; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1339 | } |
| 1340 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1341 | /* |
| 1342 | * Creates some virtual cpus. Good luck creating more than one. |
| 1343 | */ |
| 1344 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) |
| 1345 | { |
| 1346 | int r; |
| 1347 | struct kvm_vcpu *vcpu; |
| 1348 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1349 | if (!valid_vcpu(n)) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1350 | return -EINVAL; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1351 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 1352 | vcpu = kvm_arch_vcpu_create(kvm, n); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1353 | if (IS_ERR(vcpu)) |
| 1354 | return PTR_ERR(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1355 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 1356 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
| 1357 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1358 | r = kvm_arch_vcpu_setup(vcpu); |
| 1359 | if (r) |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 1360 | return r; |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1361 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1362 | mutex_lock(&kvm->lock); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1363 | if (kvm->vcpus[n]) { |
| 1364 | r = -EEXIST; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 1365 | goto vcpu_destroy; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1366 | } |
| 1367 | kvm->vcpus[n] = vcpu; |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1368 | mutex_unlock(&kvm->lock); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1369 | |
| 1370 | /* Now it's all set up, let userspace reach it */ |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1371 | kvm_get_kvm(kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1372 | r = create_vcpu_fd(vcpu); |
| 1373 | if (r < 0) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1374 | goto unlink; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1375 | return r; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1376 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1377 | unlink: |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1378 | mutex_lock(&kvm->lock); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1379 | kvm->vcpus[n] = NULL; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 1380 | vcpu_destroy: |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 1381 | mutex_unlock(&kvm->lock); |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 1382 | kvm_arch_vcpu_destroy(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1383 | return r; |
| 1384 | } |
| 1385 | |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1386 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
| 1387 | { |
| 1388 | if (sigset) { |
| 1389 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1390 | vcpu->sigset_active = 1; |
| 1391 | vcpu->sigset = *sigset; |
| 1392 | } else |
| 1393 | vcpu->sigset_active = 0; |
| 1394 | return 0; |
| 1395 | } |
| 1396 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1397 | static long kvm_vcpu_ioctl(struct file *filp, |
| 1398 | unsigned int ioctl, unsigned long arg) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1399 | { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1400 | struct kvm_vcpu *vcpu = filp->private_data; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1401 | void __user *argp = (void __user *)arg; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1402 | int r; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1403 | struct kvm_fpu *fpu = NULL; |
| 1404 | struct kvm_sregs *kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1405 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 1406 | if (vcpu->kvm->mm != current->mm) |
| 1407 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1408 | switch (ioctl) { |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1409 | case KVM_RUN: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 1410 | r = -EINVAL; |
| 1411 | if (arg) |
| 1412 | goto out; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 1413 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1414 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1415 | case KVM_GET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1416 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1417 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1418 | r = -ENOMEM; |
| 1419 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 1420 | if (!kvm_regs) |
| 1421 | goto out; |
| 1422 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1423 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1424 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1425 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1426 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
| 1427 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1428 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1429 | out_free1: |
| 1430 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1431 | break; |
| 1432 | } |
| 1433 | case KVM_SET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1434 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1435 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1436 | r = -ENOMEM; |
| 1437 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 1438 | if (!kvm_regs) |
| 1439 | goto out; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1440 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1441 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) |
| 1442 | goto out_free2; |
| 1443 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1444 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1445 | goto out_free2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1446 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1447 | out_free2: |
| 1448 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1449 | break; |
| 1450 | } |
| 1451 | case KVM_GET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1452 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 1453 | r = -ENOMEM; |
| 1454 | if (!kvm_sregs) |
| 1455 | goto out; |
| 1456 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1457 | if (r) |
| 1458 | goto out; |
| 1459 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1460 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1461 | goto out; |
| 1462 | r = 0; |
| 1463 | break; |
| 1464 | } |
| 1465 | case KVM_SET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1466 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 1467 | r = -ENOMEM; |
| 1468 | if (!kvm_sregs) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1469 | goto out; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1470 | r = -EFAULT; |
| 1471 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
| 1472 | goto out; |
| 1473 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1474 | if (r) |
| 1475 | goto out; |
| 1476 | r = 0; |
| 1477 | break; |
| 1478 | } |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1479 | case KVM_GET_MP_STATE: { |
| 1480 | struct kvm_mp_state mp_state; |
| 1481 | |
| 1482 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); |
| 1483 | if (r) |
| 1484 | goto out; |
| 1485 | r = -EFAULT; |
| 1486 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) |
| 1487 | goto out; |
| 1488 | r = 0; |
| 1489 | break; |
| 1490 | } |
| 1491 | case KVM_SET_MP_STATE: { |
| 1492 | struct kvm_mp_state mp_state; |
| 1493 | |
| 1494 | r = -EFAULT; |
| 1495 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) |
| 1496 | goto out; |
| 1497 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); |
| 1498 | if (r) |
| 1499 | goto out; |
| 1500 | r = 0; |
| 1501 | break; |
| 1502 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1503 | case KVM_TRANSLATE: { |
| 1504 | struct kvm_translation tr; |
| 1505 | |
| 1506 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1507 | if (copy_from_user(&tr, argp, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1508 | goto out; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 1509 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1510 | if (r) |
| 1511 | goto out; |
| 1512 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1513 | if (copy_to_user(argp, &tr, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1514 | goto out; |
| 1515 | r = 0; |
| 1516 | break; |
| 1517 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1518 | case KVM_DEBUG_GUEST: { |
| 1519 | struct kvm_debug_guest dbg; |
| 1520 | |
| 1521 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1522 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1523 | goto out; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 1524 | r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1525 | if (r) |
| 1526 | goto out; |
| 1527 | r = 0; |
| 1528 | break; |
| 1529 | } |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1530 | case KVM_SET_SIGNAL_MASK: { |
| 1531 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 1532 | struct kvm_signal_mask kvm_sigmask; |
| 1533 | sigset_t sigset, *p; |
| 1534 | |
| 1535 | p = NULL; |
| 1536 | if (argp) { |
| 1537 | r = -EFAULT; |
| 1538 | if (copy_from_user(&kvm_sigmask, argp, |
| 1539 | sizeof kvm_sigmask)) |
| 1540 | goto out; |
| 1541 | r = -EINVAL; |
| 1542 | if (kvm_sigmask.len != sizeof sigset) |
| 1543 | goto out; |
| 1544 | r = -EFAULT; |
| 1545 | if (copy_from_user(&sigset, sigmask_arg->sigset, |
| 1546 | sizeof sigset)) |
| 1547 | goto out; |
| 1548 | p = &sigset; |
| 1549 | } |
| 1550 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); |
| 1551 | break; |
| 1552 | } |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1553 | case KVM_GET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1554 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 1555 | r = -ENOMEM; |
| 1556 | if (!fpu) |
| 1557 | goto out; |
| 1558 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1559 | if (r) |
| 1560 | goto out; |
| 1561 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1562 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1563 | goto out; |
| 1564 | r = 0; |
| 1565 | break; |
| 1566 | } |
| 1567 | case KVM_SET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1568 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 1569 | r = -ENOMEM; |
| 1570 | if (!fpu) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1571 | goto out; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1572 | r = -EFAULT; |
| 1573 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
| 1574 | goto out; |
| 1575 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1576 | if (r) |
| 1577 | goto out; |
| 1578 | r = 0; |
| 1579 | break; |
| 1580 | } |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1581 | default: |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1582 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1583 | } |
| 1584 | out: |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1585 | kfree(fpu); |
| 1586 | kfree(kvm_sregs); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1587 | return r; |
| 1588 | } |
| 1589 | |
| 1590 | static long kvm_vm_ioctl(struct file *filp, |
| 1591 | unsigned int ioctl, unsigned long arg) |
| 1592 | { |
| 1593 | struct kvm *kvm = filp->private_data; |
| 1594 | void __user *argp = (void __user *)arg; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1595 | int r; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1596 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 1597 | if (kvm->mm != current->mm) |
| 1598 | return -EIO; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1599 | switch (ioctl) { |
| 1600 | case KVM_CREATE_VCPU: |
| 1601 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); |
| 1602 | if (r < 0) |
| 1603 | goto out; |
| 1604 | break; |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 1605 | case KVM_SET_USER_MEMORY_REGION: { |
| 1606 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1607 | |
| 1608 | r = -EFAULT; |
| 1609 | if (copy_from_user(&kvm_userspace_mem, argp, |
| 1610 | sizeof kvm_userspace_mem)) |
| 1611 | goto out; |
| 1612 | |
| 1613 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1614 | if (r) |
| 1615 | goto out; |
| 1616 | break; |
| 1617 | } |
| 1618 | case KVM_GET_DIRTY_LOG: { |
| 1619 | struct kvm_dirty_log log; |
| 1620 | |
| 1621 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1622 | if (copy_from_user(&log, argp, sizeof log)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1623 | goto out; |
Avi Kivity | 2c6f5df | 2007-02-20 18:27:58 +0200 | [diff] [blame] | 1624 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1625 | if (r) |
| 1626 | goto out; |
| 1627 | break; |
| 1628 | } |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1629 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1630 | case KVM_REGISTER_COALESCED_MMIO: { |
| 1631 | struct kvm_coalesced_mmio_zone zone; |
| 1632 | r = -EFAULT; |
| 1633 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 1634 | goto out; |
| 1635 | r = -ENXIO; |
| 1636 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
| 1637 | if (r) |
| 1638 | goto out; |
| 1639 | r = 0; |
| 1640 | break; |
| 1641 | } |
| 1642 | case KVM_UNREGISTER_COALESCED_MMIO: { |
| 1643 | struct kvm_coalesced_mmio_zone zone; |
| 1644 | r = -EFAULT; |
| 1645 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 1646 | goto out; |
| 1647 | r = -ENXIO; |
| 1648 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
| 1649 | if (r) |
| 1650 | goto out; |
| 1651 | r = 0; |
| 1652 | break; |
| 1653 | } |
| 1654 | #endif |
Xiantao Zhang | 8a98f66 | 2008-10-06 13:47:38 +0800 | [diff] [blame] | 1655 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
| 1656 | case KVM_ASSIGN_PCI_DEVICE: { |
| 1657 | struct kvm_assigned_pci_dev assigned_dev; |
| 1658 | |
| 1659 | r = -EFAULT; |
| 1660 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) |
| 1661 | goto out; |
| 1662 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); |
| 1663 | if (r) |
| 1664 | goto out; |
| 1665 | break; |
| 1666 | } |
| 1667 | case KVM_ASSIGN_IRQ: { |
| 1668 | struct kvm_assigned_irq assigned_irq; |
| 1669 | |
| 1670 | r = -EFAULT; |
| 1671 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) |
| 1672 | goto out; |
| 1673 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); |
| 1674 | if (r) |
| 1675 | goto out; |
| 1676 | break; |
| 1677 | } |
| 1678 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1679 | default: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1680 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1681 | } |
| 1682 | out: |
| 1683 | return r; |
| 1684 | } |
| 1685 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1686 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1687 | { |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 1688 | struct page *page[1]; |
| 1689 | unsigned long addr; |
| 1690 | int npages; |
| 1691 | gfn_t gfn = vmf->pgoff; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1692 | struct kvm *kvm = vma->vm_file->private_data; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1693 | |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 1694 | addr = gfn_to_hva(kvm, gfn); |
| 1695 | if (kvm_is_error_hva(addr)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1696 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 1697 | |
| 1698 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, |
| 1699 | NULL); |
| 1700 | if (unlikely(npages != 1)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1701 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 1702 | |
| 1703 | vmf->page = page[0]; |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1704 | return 0; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1705 | } |
| 1706 | |
| 1707 | static struct vm_operations_struct kvm_vm_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1708 | .fault = kvm_vm_fault, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1709 | }; |
| 1710 | |
| 1711 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) |
| 1712 | { |
| 1713 | vma->vm_ops = &kvm_vm_vm_ops; |
| 1714 | return 0; |
| 1715 | } |
| 1716 | |
Jan Engelhardt | 5c50274 | 2008-01-22 20:46:14 +0100 | [diff] [blame] | 1717 | static const struct file_operations kvm_vm_fops = { |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1718 | .release = kvm_vm_release, |
| 1719 | .unlocked_ioctl = kvm_vm_ioctl, |
| 1720 | .compat_ioctl = kvm_vm_ioctl, |
| 1721 | .mmap = kvm_vm_mmap, |
| 1722 | }; |
| 1723 | |
| 1724 | static int kvm_dev_ioctl_create_vm(void) |
| 1725 | { |
Al Viro | 2030a42 | 2008-02-23 06:46:49 -0500 | [diff] [blame] | 1726 | int fd; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1727 | struct kvm *kvm; |
| 1728 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1729 | kvm = kvm_create_vm(); |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 1730 | if (IS_ERR(kvm)) |
| 1731 | return PTR_ERR(kvm); |
Ulrich Drepper | 7d9dbca | 2008-07-23 21:29:22 -0700 | [diff] [blame] | 1732 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
Al Viro | 2030a42 | 2008-02-23 06:46:49 -0500 | [diff] [blame] | 1733 | if (fd < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1734 | kvm_put_kvm(kvm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1735 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1736 | return fd; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1737 | } |
| 1738 | |
| 1739 | static long kvm_dev_ioctl(struct file *filp, |
| 1740 | unsigned int ioctl, unsigned long arg) |
| 1741 | { |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 1742 | long r = -EINVAL; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1743 | |
| 1744 | switch (ioctl) { |
| 1745 | case KVM_GET_API_VERSION: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 1746 | r = -EINVAL; |
| 1747 | if (arg) |
| 1748 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1749 | r = KVM_API_VERSION; |
| 1750 | break; |
| 1751 | case KVM_CREATE_VM: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 1752 | r = -EINVAL; |
| 1753 | if (arg) |
| 1754 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 1755 | r = kvm_dev_ioctl_create_vm(); |
| 1756 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1757 | case KVM_CHECK_EXTENSION: |
Christian Borntraeger | 1e1c65e | 2008-04-21 13:48:24 +0200 | [diff] [blame] | 1758 | r = kvm_dev_ioctl_check_extension(arg); |
Avi Kivity | 5d308f4 | 2007-03-01 17:56:20 +0200 | [diff] [blame] | 1759 | break; |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 1760 | case KVM_GET_VCPU_MMAP_SIZE: |
| 1761 | r = -EINVAL; |
| 1762 | if (arg) |
| 1763 | goto out; |
Avi Kivity | adb1ff4 | 2008-01-24 15:13:08 +0200 | [diff] [blame] | 1764 | r = PAGE_SIZE; /* struct kvm_run */ |
| 1765 | #ifdef CONFIG_X86 |
| 1766 | r += PAGE_SIZE; /* pio data page */ |
| 1767 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1768 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1769 | r += PAGE_SIZE; /* coalesced mmio ring page */ |
| 1770 | #endif |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 1771 | break; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 1772 | case KVM_TRACE_ENABLE: |
| 1773 | case KVM_TRACE_PAUSE: |
| 1774 | case KVM_TRACE_DISABLE: |
| 1775 | r = kvm_trace_ioctl(ioctl, arg); |
| 1776 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1777 | default: |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1778 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1779 | } |
| 1780 | out: |
| 1781 | return r; |
| 1782 | } |
| 1783 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1784 | static struct file_operations kvm_chardev_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1785 | .unlocked_ioctl = kvm_dev_ioctl, |
| 1786 | .compat_ioctl = kvm_dev_ioctl, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1787 | }; |
| 1788 | |
| 1789 | static struct miscdevice kvm_dev = { |
Avi Kivity | bbe4432 | 2007-03-04 13:27:36 +0200 | [diff] [blame] | 1790 | KVM_MINOR, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1791 | "kvm", |
| 1792 | &kvm_chardev_ops, |
| 1793 | }; |
| 1794 | |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 1795 | static void hardware_enable(void *junk) |
| 1796 | { |
| 1797 | int cpu = raw_smp_processor_id(); |
| 1798 | |
| 1799 | if (cpu_isset(cpu, cpus_hardware_enabled)) |
| 1800 | return; |
| 1801 | cpu_set(cpu, cpus_hardware_enabled); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 1802 | kvm_arch_hardware_enable(NULL); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 1803 | } |
| 1804 | |
| 1805 | static void hardware_disable(void *junk) |
| 1806 | { |
| 1807 | int cpu = raw_smp_processor_id(); |
| 1808 | |
| 1809 | if (!cpu_isset(cpu, cpus_hardware_enabled)) |
| 1810 | return; |
| 1811 | cpu_clear(cpu, cpus_hardware_enabled); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 1812 | kvm_arch_hardware_disable(NULL); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 1813 | } |
| 1814 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1815 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
| 1816 | void *v) |
| 1817 | { |
| 1818 | int cpu = (long)v; |
| 1819 | |
Avi Kivity | 1a6f4d7 | 2007-11-11 18:37:32 +0200 | [diff] [blame] | 1820 | val &= ~CPU_TASKS_FROZEN; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1821 | switch (val) { |
Avi Kivity | cec9ad2 | 2007-05-24 13:11:41 +0300 | [diff] [blame] | 1822 | case CPU_DYING: |
Avi Kivity | 6ec8a85 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 1823 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
| 1824 | cpu); |
| 1825 | hardware_disable(NULL); |
| 1826 | break; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1827 | case CPU_UP_CANCELED: |
Jeremy Katz | 43934a3 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 1828 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
| 1829 | cpu); |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 1830 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1831 | break; |
Jeremy Katz | 43934a3 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 1832 | case CPU_ONLINE: |
| 1833 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
| 1834 | cpu); |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 1835 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1836 | break; |
| 1837 | } |
| 1838 | return NOTIFY_OK; |
| 1839 | } |
| 1840 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 1841 | |
| 1842 | asmlinkage void kvm_handle_fault_on_reboot(void) |
| 1843 | { |
| 1844 | if (kvm_rebooting) |
| 1845 | /* spin while reset goes on */ |
| 1846 | while (true) |
| 1847 | ; |
| 1848 | /* Fault while not rebooting. We want the trace. */ |
| 1849 | BUG(); |
| 1850 | } |
| 1851 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); |
| 1852 | |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 1853 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1854 | void *v) |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 1855 | { |
| 1856 | if (val == SYS_RESTART) { |
| 1857 | /* |
| 1858 | * Some (well, at least mine) BIOSes hang on reboot if |
| 1859 | * in vmx root mode. |
| 1860 | */ |
| 1861 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 1862 | kvm_rebooting = true; |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 1863 | on_each_cpu(hardware_disable, NULL, 1); |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 1864 | } |
| 1865 | return NOTIFY_OK; |
| 1866 | } |
| 1867 | |
| 1868 | static struct notifier_block kvm_reboot_notifier = { |
| 1869 | .notifier_call = kvm_reboot, |
| 1870 | .priority = 0, |
| 1871 | }; |
| 1872 | |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 1873 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
| 1874 | { |
| 1875 | memset(bus, 0, sizeof(*bus)); |
| 1876 | } |
| 1877 | |
| 1878 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
| 1879 | { |
| 1880 | int i; |
| 1881 | |
| 1882 | for (i = 0; i < bus->dev_count; i++) { |
| 1883 | struct kvm_io_device *pos = bus->devs[i]; |
| 1884 | |
| 1885 | kvm_iodevice_destructor(pos); |
| 1886 | } |
| 1887 | } |
| 1888 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 1889 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, |
| 1890 | gpa_t addr, int len, int is_write) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 1891 | { |
| 1892 | int i; |
| 1893 | |
| 1894 | for (i = 0; i < bus->dev_count; i++) { |
| 1895 | struct kvm_io_device *pos = bus->devs[i]; |
| 1896 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 1897 | if (pos->in_range(pos, addr, len, is_write)) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 1898 | return pos; |
| 1899 | } |
| 1900 | |
| 1901 | return NULL; |
| 1902 | } |
| 1903 | |
| 1904 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) |
| 1905 | { |
| 1906 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); |
| 1907 | |
| 1908 | bus->devs[bus->dev_count++] = dev; |
| 1909 | } |
| 1910 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1911 | static struct notifier_block kvm_cpu_notifier = { |
| 1912 | .notifier_call = kvm_cpu_hotplug, |
| 1913 | .priority = 20, /* must be > scheduler priority */ |
| 1914 | }; |
| 1915 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1916 | static int vm_stat_get(void *_offset, u64 *val) |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1917 | { |
| 1918 | unsigned offset = (long)_offset; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1919 | struct kvm *kvm; |
| 1920 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1921 | *val = 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1922 | spin_lock(&kvm_lock); |
| 1923 | list_for_each_entry(kvm, &vm_list, vm_list) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1924 | *val += *(u32 *)((void *)kvm + offset); |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1925 | spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1926 | return 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1927 | } |
| 1928 | |
| 1929 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); |
| 1930 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1931 | static int vcpu_stat_get(void *_offset, u64 *val) |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1932 | { |
| 1933 | unsigned offset = (long)_offset; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1934 | struct kvm *kvm; |
| 1935 | struct kvm_vcpu *vcpu; |
| 1936 | int i; |
| 1937 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1938 | *val = 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1939 | spin_lock(&kvm_lock); |
| 1940 | list_for_each_entry(kvm, &vm_list, vm_list) |
| 1941 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1942 | vcpu = kvm->vcpus[i]; |
| 1943 | if (vcpu) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1944 | *val += *(u32 *)((void *)vcpu + offset); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1945 | } |
| 1946 | spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 1947 | return 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1948 | } |
| 1949 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1950 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
| 1951 | |
| 1952 | static struct file_operations *stat_fops[] = { |
| 1953 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
| 1954 | [KVM_STAT_VM] = &vm_stat_fops, |
| 1955 | }; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1956 | |
Zhang Xiantao | a16b043 | 2007-11-16 14:38:21 +0800 | [diff] [blame] | 1957 | static void kvm_init_debug(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1958 | { |
| 1959 | struct kvm_stats_debugfs_item *p; |
| 1960 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 1961 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1962 | for (p = debugfs_entries; p->name; ++p) |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 1963 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1964 | (void *)(long)p->offset, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 1965 | stat_fops[p->kind]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1966 | } |
| 1967 | |
| 1968 | static void kvm_exit_debug(void) |
| 1969 | { |
| 1970 | struct kvm_stats_debugfs_item *p; |
| 1971 | |
| 1972 | for (p = debugfs_entries; p->name; ++p) |
| 1973 | debugfs_remove(p->dentry); |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 1974 | debugfs_remove(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1975 | } |
| 1976 | |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 1977 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
| 1978 | { |
Avi Kivity | 4267c41 | 2007-05-24 13:09:41 +0300 | [diff] [blame] | 1979 | hardware_disable(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 1980 | return 0; |
| 1981 | } |
| 1982 | |
| 1983 | static int kvm_resume(struct sys_device *dev) |
| 1984 | { |
Avi Kivity | 4267c41 | 2007-05-24 13:09:41 +0300 | [diff] [blame] | 1985 | hardware_enable(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 1986 | return 0; |
| 1987 | } |
| 1988 | |
| 1989 | static struct sysdev_class kvm_sysdev_class = { |
Kay Sievers | af5ca3f | 2007-12-20 02:09:39 +0100 | [diff] [blame] | 1990 | .name = "kvm", |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 1991 | .suspend = kvm_suspend, |
| 1992 | .resume = kvm_resume, |
| 1993 | }; |
| 1994 | |
| 1995 | static struct sys_device kvm_sysdev = { |
| 1996 | .id = 0, |
| 1997 | .cls = &kvm_sysdev_class, |
| 1998 | }; |
| 1999 | |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 2000 | struct page *bad_page; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 2001 | pfn_t bad_pfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2002 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2003 | static inline |
| 2004 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) |
| 2005 | { |
| 2006 | return container_of(pn, struct kvm_vcpu, preempt_notifier); |
| 2007 | } |
| 2008 | |
| 2009 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) |
| 2010 | { |
| 2011 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2012 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2013 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2014 | } |
| 2015 | |
| 2016 | static void kvm_sched_out(struct preempt_notifier *pn, |
| 2017 | struct task_struct *next) |
| 2018 | { |
| 2019 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2020 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2021 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2022 | } |
| 2023 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2024 | int kvm_init(void *opaque, unsigned int vcpu_size, |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2025 | struct module *module) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2026 | { |
| 2027 | int r; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2028 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2029 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2030 | kvm_init_debug(); |
| 2031 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2032 | r = kvm_arch_init(opaque); |
| 2033 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2034 | goto out_fail; |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2035 | |
| 2036 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 2037 | |
| 2038 | if (bad_page == NULL) { |
| 2039 | r = -ENOMEM; |
| 2040 | goto out; |
| 2041 | } |
| 2042 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 2043 | bad_pfn = page_to_pfn(bad_page); |
| 2044 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2045 | r = kvm_arch_hardware_setup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2046 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2047 | goto out_free_0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2048 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2049 | for_each_online_cpu(cpu) { |
| 2050 | smp_call_function_single(cpu, |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2051 | kvm_arch_check_processor_compat, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 2052 | &r, 1); |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2053 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2054 | goto out_free_1; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2055 | } |
| 2056 | |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 2057 | on_each_cpu(hardware_enable, NULL, 1); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2058 | r = register_cpu_notifier(&kvm_cpu_notifier); |
| 2059 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2060 | goto out_free_2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2061 | register_reboot_notifier(&kvm_reboot_notifier); |
| 2062 | |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2063 | r = sysdev_class_register(&kvm_sysdev_class); |
| 2064 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2065 | goto out_free_3; |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2066 | |
| 2067 | r = sysdev_register(&kvm_sysdev); |
| 2068 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2069 | goto out_free_4; |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2070 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2071 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
| 2072 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, |
Joe Perches | 56919c5 | 2007-11-12 20:06:51 -0800 | [diff] [blame] | 2073 | __alignof__(struct kvm_vcpu), |
| 2074 | 0, NULL); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2075 | if (!kvm_vcpu_cache) { |
| 2076 | r = -ENOMEM; |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2077 | goto out_free_5; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2078 | } |
| 2079 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2080 | kvm_chardev_ops.owner = module; |
| 2081 | |
| 2082 | r = misc_register(&kvm_dev); |
| 2083 | if (r) { |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2084 | printk(KERN_ERR "kvm: misc device register failed\n"); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2085 | goto out_free; |
| 2086 | } |
| 2087 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2088 | kvm_preempt_ops.sched_in = kvm_sched_in; |
| 2089 | kvm_preempt_ops.sched_out = kvm_sched_out; |
| 2090 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 2091 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2092 | |
| 2093 | out_free: |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2094 | kmem_cache_destroy(kvm_vcpu_cache); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2095 | out_free_5: |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2096 | sysdev_unregister(&kvm_sysdev); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2097 | out_free_4: |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2098 | sysdev_class_unregister(&kvm_sysdev_class); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2099 | out_free_3: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2100 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2101 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2102 | out_free_2: |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 2103 | on_each_cpu(hardware_disable, NULL, 1); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2104 | out_free_1: |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2105 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2106 | out_free_0: |
| 2107 | __free_page(bad_page); |
Avi Kivity | ca45aaa | 2007-03-01 19:21:03 +0200 | [diff] [blame] | 2108 | out: |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2109 | kvm_arch_exit(); |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2110 | kvm_exit_debug(); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2111 | out_fail: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2112 | return r; |
| 2113 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2114 | EXPORT_SYMBOL_GPL(kvm_init); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2115 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2116 | void kvm_exit(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2117 | { |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2118 | kvm_trace_cleanup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2119 | misc_deregister(&kvm_dev); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2120 | kmem_cache_destroy(kvm_vcpu_cache); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2121 | sysdev_unregister(&kvm_sysdev); |
| 2122 | sysdev_class_unregister(&kvm_sysdev_class); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2123 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2124 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 2125 | on_each_cpu(hardware_disable, NULL, 1); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2126 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2127 | kvm_arch_exit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2128 | kvm_exit_debug(); |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 2129 | __free_page(bad_page); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2130 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2131 | EXPORT_SYMBOL_GPL(kvm_exit); |