projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: mmu_notifiers release method
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / virt / kvm / kvm_main.c
CommitLineData
6aa8b732
AK		 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
e2174021 18#include "iodev.h"
6aa8b732 19
edf88417 20#include <linux/kvm_host.h>
6aa8b732
AK		 21#include <linux/kvm.h>
22#include <linux/module.h>
23#include <linux/errno.h>
6aa8b732
AK		 24#include <linux/percpu.h>
25#include <linux/gfp.h>
6aa8b732
AK		 26#include <linux/mm.h>
27#include <linux/miscdevice.h>
28#include <linux/vmalloc.h>
6aa8b732 29#include <linux/reboot.h>
6aa8b732
AK		 30#include <linux/debugfs.h>
31#include <linux/highmem.h>
32#include <linux/file.h>
59ae6c6b 33#include <linux/sysdev.h>
774c47f1 34#include <linux/cpu.h>
e8edc6e0 35#include <linux/sched.h>
d9e368d6
AK		 36#include <linux/cpumask.h>
37#include <linux/smp.h>
d6d28168 38#include <linux/anon_inodes.h>
04d2cc77 39#include <linux/profile.h>
7aa81cc0 40#include <linux/kvm_para.h>
6fc138d2 41#include <linux/pagemap.h>
8d4e1288 42#include <linux/mman.h>
35149e21 43#include <linux/swap.h>
6aa8b732 44
e495606d 45#include <asm/processor.h>
e495606d
AK		 46#include <asm/io.h>
47#include <asm/uaccess.h>
3e021bf5 48#include <asm/pgtable.h>
6aa8b732 49
f64769eb
SY		 50#ifdef CONFIG_X86
51#include <asm/msidef.h>
52#endif
53
5f94c174
LV		 54#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
55#include "coalesced_mmio.h"
56#endif
57
8a98f664
XZ		 58#ifdef KVM_CAP_DEVICE_ASSIGNMENT
59#include <linux/pci.h>
60#include <linux/interrupt.h>
61#include "irq.h"
62#endif
63
6aa8b732
AK		 64MODULE_AUTHOR("Qumranet");
65MODULE_LICENSE("GPL");
66
5319c662
SY		 67static int msi2intx = 1;
68module_param(msi2intx, bool, 0);
69
e9b11c17
ZX		 70DEFINE_SPINLOCK(kvm_lock);
71LIST_HEAD(vm_list);
133de902 72
7f59f492 73static cpumask_var_t cpus_hardware_enabled;
1b6c0168 74
c16f862d
RR		 75struct kmem_cache *kvm_vcpu_cache;
76EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 77
15ad7146
AK		 78static __read_mostly struct preempt_ops kvm_preempt_ops;
79
76f7c879 80struct dentry *kvm_debugfs_dir;
6aa8b732 81
bccf2150
AK		 82static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
83 unsigned long arg);
84
e8ba5d31 85static bool kvm_rebooting;
4ecac3fd 86
8a98f664 87#ifdef KVM_CAP_DEVICE_ASSIGNMENT
f64769eb
SY		 88
89#ifdef CONFIG_X86
90static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev)
91{
92 int vcpu_id;
93 struct kvm_vcpu *vcpu;
94 struct kvm_ioapic *ioapic = ioapic_irqchip(dev->kvm);
95 int dest_id = (dev->guest_msi.address_lo & MSI_ADDR_DEST_ID_MASK)
96 >> MSI_ADDR_DEST_ID_SHIFT;
97 int vector = (dev->guest_msi.data & MSI_DATA_VECTOR_MASK)
98 >> MSI_DATA_VECTOR_SHIFT;
99 int dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
100 (unsigned long *)&dev->guest_msi.address_lo);
101 int trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
102 (unsigned long *)&dev->guest_msi.data);
103 int delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
104 (unsigned long *)&dev->guest_msi.data);
105 u32 deliver_bitmask;
106
107 BUG_ON(!ioapic);
108
109 deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
110 dest_id, dest_mode);
111 /* IOAPIC delivery mode value is the same as MSI here */
112 switch (delivery_mode) {
113 case IOAPIC_LOWEST_PRIORITY:
114 vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
115 deliver_bitmask);
116 if (vcpu != NULL)
117 kvm_apic_set_irq(vcpu, vector, trig_mode);
118 else
119 printk(KERN_INFO "kvm: null lowest priority vcpu!\n");
120 break;
121 case IOAPIC_FIXED:
122 for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
123 if (!(deliver_bitmask & (1 << vcpu_id)))
124 continue;
125 deliver_bitmask &= ~(1 << vcpu_id);
126 vcpu = ioapic->kvm->vcpus[vcpu_id];
127 if (vcpu)
128 kvm_apic_set_irq(vcpu, vector, trig_mode);
129 }
130 break;
131 default:
132 printk(KERN_INFO "kvm: unsupported MSI delivery mode\n");
133 }
134}
135#else
136static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev) {}
137#endif
138
8a98f664
XZ		 139static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
140 int assigned_dev_id)
141{
142 struct list_head *ptr;
143 struct kvm_assigned_dev_kernel *match;
144
145 list_for_each(ptr, head) {
146 match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
147 if (match->assigned_dev_id == assigned_dev_id)
148 return match;
149 }
150 return NULL;
151}
152
153static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
154{
155 struct kvm_assigned_dev_kernel *assigned_dev;
156
157 assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
158 interrupt_work);
159
160 /* This is taken to safely inject irq inside the guest. When
161 * the interrupt injection (or the ioapic code) uses a
162 * finer-grained lock, update this
163 */
164 mutex_lock(&assigned_dev->kvm->lock);
6b9cc7fd
SY		 165 if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_INTX)
166 kvm_set_irq(assigned_dev->kvm,
167 assigned_dev->irq_source_id,
168 assigned_dev->guest_irq, 1);
169 else if (assigned_dev->irq_requested_type &
170 KVM_ASSIGNED_DEV_GUEST_MSI) {
171 assigned_device_msi_dispatch(assigned_dev);
172 enable_irq(assigned_dev->host_irq);
defaf158 173 assigned_dev->host_irq_disabled = false;
6b9cc7fd 174 }
8a98f664
XZ		 175 mutex_unlock(&assigned_dev->kvm->lock);
176 kvm_put_kvm(assigned_dev->kvm);
177}
178
8a98f664
XZ		 179static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
180{
181 struct kvm_assigned_dev_kernel *assigned_dev =
182 (struct kvm_assigned_dev_kernel *) dev_id;
183
184 kvm_get_kvm(assigned_dev->kvm);
defaf158 185
8a98f664 186 schedule_work(&assigned_dev->interrupt_work);
defaf158 187
8a98f664 188 disable_irq_nosync(irq);
defaf158
MM		 189 assigned_dev->host_irq_disabled = true;
190
8a98f664
XZ		 191 return IRQ_HANDLED;
192}
193
194/* Ack the irq line for an assigned device */
195static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
196{
197 struct kvm_assigned_dev_kernel *dev;
198
199 if (kian->gsi == -1)
200 return;
201
202 dev = container_of(kian, struct kvm_assigned_dev_kernel,
203 ack_notifier);
defaf158 204
5550af4d 205 kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
defaf158
MM		 206
207 /* The guest irq may be shared so this ack may be
208 * from another device.
209 */
210 if (dev->host_irq_disabled) {
211 enable_irq(dev->host_irq);
212 dev->host_irq_disabled = false;
213 }
8a98f664
XZ		 214}
215
4a643be8
MM		 216static void kvm_free_assigned_irq(struct kvm *kvm,
217 struct kvm_assigned_dev_kernel *assigned_dev)
8a98f664 218{
4a643be8
MM		 219 if (!irqchip_in_kernel(kvm))
220 return;
8a98f664 221
e19e30ef 222 kvm_unregister_irq_ack_notifier(&assigned_dev->ack_notifier);
f29b2673
MM		 223
224 if (assigned_dev->irq_source_id != -1)
225 kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
226 assigned_dev->irq_source_id = -1;
8a98f664 227
4a643be8
MM		 228 if (!assigned_dev->irq_requested_type)
229 return;
230
8a98f664
XZ		 231 if (cancel_work_sync(&assigned_dev->interrupt_work))
232 /* We had pending work. That means we will have to take
233 * care of kvm_put_kvm.
234 */
235 kvm_put_kvm(kvm);
236
4a643be8
MM		 237 free_irq(assigned_dev->host_irq, (void *)assigned_dev);
238
239 if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)
240 pci_disable_msi(assigned_dev->dev);
241
242 assigned_dev->irq_requested_type = 0;
243}
244
245
246static void kvm_free_assigned_device(struct kvm *kvm,
247 struct kvm_assigned_dev_kernel
248 *assigned_dev)
249{
250 kvm_free_assigned_irq(kvm, assigned_dev);
251
6eb55818
SY		 252 pci_reset_function(assigned_dev->dev);
253
8a98f664
XZ		 254 pci_release_regions(assigned_dev->dev);
255 pci_disable_device(assigned_dev->dev);
256 pci_dev_put(assigned_dev->dev);
257
258 list_del(&assigned_dev->list);
259 kfree(assigned_dev);
260}
261
262void kvm_free_all_assigned_devices(struct kvm *kvm)
263{
264 struct list_head *ptr, *ptr2;
265 struct kvm_assigned_dev_kernel *assigned_dev;
266
267 list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
268 assigned_dev = list_entry(ptr,
269 struct kvm_assigned_dev_kernel,
270 list);
271
272 kvm_free_assigned_device(kvm, assigned_dev);
273 }
274}
275
00e3ed39
SY		 276static int assigned_device_update_intx(struct kvm *kvm,
277 struct kvm_assigned_dev_kernel *adev,
278 struct kvm_assigned_irq *airq)
279{
fbac7818
SY		 280 adev->guest_irq = airq->guest_irq;
281 adev->ack_notifier.gsi = airq->guest_irq;
282
283 if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_INTX)
00e3ed39 284 return 0;
00e3ed39
SY		 285
286 if (irqchip_in_kernel(kvm)) {
5319c662
SY		 287 if (!msi2intx &&
288 adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) {
6b9cc7fd
SY		 289 free_irq(adev->host_irq, (void *)kvm);
290 pci_disable_msi(adev->dev);
291 }
292
00e3ed39
SY		 293 if (!capable(CAP_SYS_RAWIO))
294 return -EPERM;
295
296 if (airq->host_irq)
297 adev->host_irq = airq->host_irq;
298 else
299 adev->host_irq = adev->dev->irq;
00e3ed39
SY		 300
301 /* Even though this is PCI, we don't want to use shared
302 * interrupts. Sharing host devices with guest-assigned devices
303 * on the same interrupt line is not a happy situation: there
304 * are going to be long delays in accepting, acking, etc.
305 */
306 if (request_irq(adev->host_irq, kvm_assigned_dev_intr,
307 0, "kvm_assigned_intx_device", (void *)adev))
308 return -EIO;
309 }
310
4f906c19
SY		 311 adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_INTX |
312 KVM_ASSIGNED_DEV_HOST_INTX;
00e3ed39
SY		 313 return 0;
314}
315
6b9cc7fd
SY		 316#ifdef CONFIG_X86
317static int assigned_device_update_msi(struct kvm *kvm,
318 struct kvm_assigned_dev_kernel *adev,
319 struct kvm_assigned_irq *airq)
320{
321 int r;
322
5319c662
SY		 323 if (airq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI) {
324 /* x86 don't care upper address of guest msi message addr */
325 adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_MSI;
326 adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_INTX;
327 adev->guest_msi.address_lo = airq->guest_msi.addr_lo;
328 adev->guest_msi.data = airq->guest_msi.data;
329 adev->ack_notifier.gsi = -1;
330 } else if (msi2intx) {
331 adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_INTX;
332 adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_MSI;
333 adev->guest_irq = airq->guest_irq;
334 adev->ack_notifier.gsi = airq->guest_irq;
335 }
6b9cc7fd
SY		 336
337 if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)
338 return 0;
339
340 if (irqchip_in_kernel(kvm)) {
5319c662
SY		 341 if (!msi2intx) {
342 if (adev->irq_requested_type &
343 KVM_ASSIGNED_DEV_HOST_INTX)
344 free_irq(adev->host_irq, (void *)adev);
345
346 r = pci_enable_msi(adev->dev);
347 if (r)
348 return r;
349 }
6b9cc7fd
SY		 350
351 adev->host_irq = adev->dev->irq;
352 if (request_irq(adev->host_irq, kvm_assigned_dev_intr, 0,
353 "kvm_assigned_msi_device", (void *)adev))
354 return -EIO;
355 }
356
5319c662
SY		 357 if (!msi2intx)
358 adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_MSI;
359
360 adev->irq_requested_type |= KVM_ASSIGNED_DEV_HOST_MSI;
6b9cc7fd
SY		 361 return 0;
362}
363#endif
364
8a98f664
XZ		 365static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
366 struct kvm_assigned_irq
367 *assigned_irq)
368{
369 int r = 0;
370 struct kvm_assigned_dev_kernel *match;
371
372 mutex_lock(&kvm->lock);
373
374 match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
375 assigned_irq->assigned_dev_id);
376 if (!match) {
377 mutex_unlock(&kvm->lock);
378 return -EINVAL;
379 }
380
4f906c19 381 if (!match->irq_requested_type) {
342ffb93
SY		 382 INIT_WORK(&match->interrupt_work,
383 kvm_assigned_dev_interrupt_work_handler);
384 if (irqchip_in_kernel(kvm)) {
385 /* Register ack nofitier */
386 match->ack_notifier.gsi = -1;
387 match->ack_notifier.irq_acked =
388 kvm_assigned_dev_ack_irq;
389 kvm_register_irq_ack_notifier(kvm,
390 &match->ack_notifier);
391
392 /* Request IRQ source ID */
393 r = kvm_request_irq_source_id(kvm);
394 if (r < 0)
395 goto out_release;
396 else
397 match->irq_source_id = r;
5319c662
SY		 398
399#ifdef CONFIG_X86
400 /* Determine host device irq type, we can know the
401 * result from dev->msi_enabled */
402 if (msi2intx)
403 pci_enable_msi(match->dev);
404#endif
342ffb93 405 }
8a98f664
XZ		 406 }
407
5319c662
SY		 408 if ((!msi2intx &&
409 (assigned_irq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI)) ||
410 (msi2intx && match->dev->msi_enabled)) {
6b9cc7fd
SY		 411#ifdef CONFIG_X86
412 r = assigned_device_update_msi(kvm, match, assigned_irq);
413 if (r) {
414 printk(KERN_WARNING "kvm: failed to enable "
415 "MSI device!\n");
416 goto out_release;
417 }
418#else
419 r = -ENOTTY;
420#endif
421 } else if (assigned_irq->host_irq == 0 && match->dev->irq == 0) {
422 /* Host device IRQ 0 means don't support INTx */
5319c662
SY		 423 if (!msi2intx) {
424 printk(KERN_WARNING
425 "kvm: wait device to enable MSI!\n");
426 r = 0;
427 } else {
428 printk(KERN_WARNING
429 "kvm: failed to enable MSI device!\n");
430 r = -ENOTTY;
431 goto out_release;
432 }
6b9cc7fd
SY		 433 } else {
434 /* Non-sharing INTx mode */
435 r = assigned_device_update_intx(kvm, match, assigned_irq);
436 if (r) {
437 printk(KERN_WARNING "kvm: failed to enable "
438 "INTx device!\n");
439 goto out_release;
440 }
441 }
8a98f664 442
8a98f664
XZ		 443 mutex_unlock(&kvm->lock);
444 return r;
445out_release:
446 mutex_unlock(&kvm->lock);
447 kvm_free_assigned_device(kvm, match);
448 return r;
449}
450
451static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
452 struct kvm_assigned_pci_dev *assigned_dev)
453{
454 int r = 0;
455 struct kvm_assigned_dev_kernel *match;
456 struct pci_dev *dev;
457
458 mutex_lock(&kvm->lock);
459
460 match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
461 assigned_dev->assigned_dev_id);
462 if (match) {
463 /* device already assigned */
464 r = -EINVAL;
465 goto out;
466 }
467
468 match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
469 if (match == NULL) {
470 printk(KERN_INFO "%s: Couldn't allocate memory\n",
471 __func__);
472 r = -ENOMEM;
473 goto out;
474 }
475 dev = pci_get_bus_and_slot(assigned_dev->busnr,
476 assigned_dev->devfn);
477 if (!dev) {
478 printk(KERN_INFO "%s: host device not found\n", __func__);
479 r = -EINVAL;
480 goto out_free;
481 }
482 if (pci_enable_device(dev)) {
483 printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
484 r = -EBUSY;
485 goto out_put;
486 }
487 r = pci_request_regions(dev, "kvm_assigned_device");
488 if (r) {
489 printk(KERN_INFO "%s: Could not get access to device regions\n",
490 __func__);
491 goto out_disable;
492 }
6eb55818
SY		 493
494 pci_reset_function(dev);
495
8a98f664
XZ		 496 match->assigned_dev_id = assigned_dev->assigned_dev_id;
497 match->host_busnr = assigned_dev->busnr;
498 match->host_devfn = assigned_dev->devfn;
b653574a 499 match->flags = assigned_dev->flags;
8a98f664 500 match->dev = dev;
f29b2673 501 match->irq_source_id = -1;
8a98f664
XZ		 502 match->kvm = kvm;
503
504 list_add(&match->list, &kvm->arch.assigned_dev_head);
505
506 if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
19de40a8 507 if (!kvm->arch.iommu_domain) {
260782bc
WH		 508 r = kvm_iommu_map_guest(kvm);
509 if (r)
510 goto out_list_del;
511 }
512 r = kvm_assign_device(kvm, match);
8a98f664
XZ		 513 if (r)
514 goto out_list_del;
515 }
516
517out:
518 mutex_unlock(&kvm->lock);
519 return r;
520out_list_del:
521 list_del(&match->list);
522 pci_release_regions(dev);
523out_disable:
524 pci_disable_device(dev);
525out_put:
526 pci_dev_put(dev);
527out_free:
528 kfree(match);
529 mutex_unlock(&kvm->lock);
530 return r;
531}
532#endif
533
0a920356
WH		 534#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
535static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
536 struct kvm_assigned_pci_dev *assigned_dev)
537{
538 int r = 0;
539 struct kvm_assigned_dev_kernel *match;
540
541 mutex_lock(&kvm->lock);
542
543 match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
544 assigned_dev->assigned_dev_id);
545 if (!match) {
546 printk(KERN_INFO "%s: device hasn't been assigned before, "
547 "so cannot be deassigned\n", __func__);
548 r = -EINVAL;
549 goto out;
550 }
551
552 if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
553 kvm_deassign_device(kvm, match);
554
555 kvm_free_assigned_device(kvm, match);
556
557out:
558 mutex_unlock(&kvm->lock);
559 return r;
560}
561#endif
562
5aacf0ca
JM		 563static inline int valid_vcpu(int n)
564{
565 return likely(n >= 0 && n < KVM_MAX_VCPUS);
566}
567
c77fb9dc 568inline int kvm_is_mmio_pfn(pfn_t pfn)
cbff90a7
BAY		 569{
570 if (pfn_valid(pfn))
571 return PageReserved(pfn_to_page(pfn));
572
573 return true;
574}
575
bccf2150
AK		 576/*
577 * Switches to specified vcpu, until a matching vcpu_put()
578 */
313a3dc7 579void vcpu_load(struct kvm_vcpu *vcpu)
6aa8b732 580{
15ad7146
AK		 581 int cpu;
582
bccf2150 583 mutex_lock(&vcpu->mutex);
15ad7146
AK		 584 cpu = get_cpu();
585 preempt_notifier_register(&vcpu->preempt_notifier);
313a3dc7 586 kvm_arch_vcpu_load(vcpu, cpu);
15ad7146 587 put_cpu();
6aa8b732
AK		 588}
589
313a3dc7 590void vcpu_put(struct kvm_vcpu *vcpu)
6aa8b732 591{
15ad7146 592 preempt_disable();
313a3dc7 593 kvm_arch_vcpu_put(vcpu);
15ad7146
AK		 594 preempt_notifier_unregister(&vcpu->preempt_notifier);
595 preempt_enable();
6aa8b732
AK		 596 mutex_unlock(&vcpu->mutex);
597}
598
d9e368d6
AK		 599static void ack_flush(void *_completed)
600{
d9e368d6
AK		 601}
602
49846896 603static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
d9e368d6 604{
597a5f55 605 int i, cpu, me;
6ef7a1bc
RR		 606 cpumask_var_t cpus;
607 bool called = true;
d9e368d6 608 struct kvm_vcpu *vcpu;
d9e368d6 609
6ef7a1bc
RR		 610 if (alloc_cpumask_var(&cpus, GFP_ATOMIC))
611 cpumask_clear(cpus);
612
597a5f55 613 me = get_cpu();
fb3f0f51
RR		 614 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
615 vcpu = kvm->vcpus[i];
616 if (!vcpu)
617 continue;
49846896 618 if (test_and_set_bit(req, &vcpu->requests))
d9e368d6
AK		 619 continue;
620 cpu = vcpu->cpu;
6ef7a1bc
RR		 621 if (cpus != NULL && cpu != -1 && cpu != me)
622 cpumask_set_cpu(cpu, cpus);
49846896 623 }
6ef7a1bc
RR		 624 if (unlikely(cpus == NULL))
625 smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1);
626 else if (!cpumask_empty(cpus))
627 smp_call_function_many(cpus, ack_flush, NULL, 1);
628 else
629 called = false;
597a5f55 630 put_cpu();
6ef7a1bc 631 free_cpumask_var(cpus);
49846896 632 return called;
d9e368d6
AK		 633}
634
49846896 635void kvm_flush_remote_tlbs(struct kvm *kvm)
2e53d63a 636{
49846896
RR		 637 if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
638 ++kvm->stat.remote_tlb_flush;
2e53d63a
MT		 639}
640
49846896
RR		 641void kvm_reload_remote_mmus(struct kvm *kvm)
642{
643 make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD);
644}
2e53d63a 645
fb3f0f51
RR		 646int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
647{
648 struct page *page;
649 int r;
650
651 mutex_init(&vcpu->mutex);
652 vcpu->cpu = -1;
fb3f0f51
RR		 653 vcpu->kvm = kvm;
654 vcpu->vcpu_id = id;
b6958ce4 655 init_waitqueue_head(&vcpu->wq);
fb3f0f51
RR		 656
657 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
658 if (!page) {
659 r = -ENOMEM;
660 goto fail;
661 }
662 vcpu->run = page_address(page);
663
e9b11c17 664 r = kvm_arch_vcpu_init(vcpu);
fb3f0f51 665 if (r < 0)
e9b11c17 666 goto fail_free_run;
fb3f0f51
RR		 667 return 0;
668
fb3f0f51
RR		 669fail_free_run:
670 free_page((unsigned long)vcpu->run);
671fail:
76fafa5e 672 return r;
fb3f0f51
RR		 673}
674EXPORT_SYMBOL_GPL(kvm_vcpu_init);
675
676void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
677{
e9b11c17 678 kvm_arch_vcpu_uninit(vcpu);
fb3f0f51
RR		 679 free_page((unsigned long)vcpu->run);
680}
681EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
682
e930bffe
AA		 683#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
684static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn)
685{
686 return container_of(mn, struct kvm, mmu_notifier);
687}
688
689static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn,
690 struct mm_struct *mm,
691 unsigned long address)
692{
693 struct kvm *kvm = mmu_notifier_to_kvm(mn);
694 int need_tlb_flush;
695
696 /*
697 * When ->invalidate_page runs, the linux pte has been zapped
698 * already but the page is still allocated until
699 * ->invalidate_page returns. So if we increase the sequence
700 * here the kvm page fault will notice if the spte can't be
701 * established because the page is going to be freed. If
702 * instead the kvm page fault establishes the spte before
703 * ->invalidate_page runs, kvm_unmap_hva will release it
704 * before returning.
705 *
706 * The sequence increase only need to be seen at spin_unlock
707 * time, and not at spin_lock time.
708 *
709 * Increasing the sequence after the spin_unlock would be
710 * unsafe because the kvm page fault could then establish the
711 * pte after kvm_unmap_hva returned, without noticing the page
712 * is going to be freed.
713 */
714 spin_lock(&kvm->mmu_lock);
715 kvm->mmu_notifier_seq++;
716 need_tlb_flush = kvm_unmap_hva(kvm, address);
717 spin_unlock(&kvm->mmu_lock);
718
719 /* we've to flush the tlb before the pages can be freed */
720 if (need_tlb_flush)
721 kvm_flush_remote_tlbs(kvm);
722
723}
724
725static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
726 struct mm_struct *mm,
727 unsigned long start,
728 unsigned long end)
729{
730 struct kvm *kvm = mmu_notifier_to_kvm(mn);
731 int need_tlb_flush = 0;
732
733 spin_lock(&kvm->mmu_lock);
734 /*
735 * The count increase must become visible at unlock time as no
736 * spte can be established without taking the mmu_lock and
737 * count is also read inside the mmu_lock critical section.
738 */
739 kvm->mmu_notifier_count++;
740 for (; start < end; start += PAGE_SIZE)
741 need_tlb_flush |= kvm_unmap_hva(kvm, start);
742 spin_unlock(&kvm->mmu_lock);
743
744 /* we've to flush the tlb before the pages can be freed */
745 if (need_tlb_flush)
746 kvm_flush_remote_tlbs(kvm);
747}
748
749static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
750 struct mm_struct *mm,
751 unsigned long start,
752 unsigned long end)
753{
754 struct kvm *kvm = mmu_notifier_to_kvm(mn);
755
756 spin_lock(&kvm->mmu_lock);
757 /*
758 * This sequence increase will notify the kvm page fault that
759 * the page that is going to be mapped in the spte could have
760 * been freed.
761 */
762 kvm->mmu_notifier_seq++;
763 /*
764 * The above sequence increase must be visible before the
765 * below count decrease but both values are read by the kvm
766 * page fault under mmu_lock spinlock so we don't need to add
767 * a smb_wmb() here in between the two.
768 */
769 kvm->mmu_notifier_count--;
770 spin_unlock(&kvm->mmu_lock);
771
772 BUG_ON(kvm->mmu_notifier_count < 0);
773}
774
775static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn,
776 struct mm_struct *mm,
777 unsigned long address)
778{
779 struct kvm *kvm = mmu_notifier_to_kvm(mn);
780 int young;
781
782 spin_lock(&kvm->mmu_lock);
783 young = kvm_age_hva(kvm, address);
784 spin_unlock(&kvm->mmu_lock);
785
786 if (young)
787 kvm_flush_remote_tlbs(kvm);
788
789 return young;
790}
791
85db06e5
MT		 792static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
793 struct mm_struct *mm)
794{
795 struct kvm *kvm = mmu_notifier_to_kvm(mn);
796 kvm_arch_flush_shadow(kvm);
797}
798
e930bffe
AA		 799static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
800 .invalidate_page = kvm_mmu_notifier_invalidate_page,
801 .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start,
802 .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end,
803 .clear_flush_young = kvm_mmu_notifier_clear_flush_young,
85db06e5 804 .release = kvm_mmu_notifier_release,
e930bffe
AA		 805};
806#endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */
807
f17abe9a 808static struct kvm *kvm_create_vm(void)
6aa8b732 809{
d19a9cd2 810 struct kvm *kvm = kvm_arch_create_vm();
5f94c174
LV		 811#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
812 struct page *page;
813#endif
6aa8b732 814
d19a9cd2
ZX		 815 if (IS_ERR(kvm))
816 goto out;
6aa8b732 817
5f94c174
LV		 818#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
819 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
820 if (!page) {
821 kfree(kvm);
822 return ERR_PTR(-ENOMEM);
823 }
824 kvm->coalesced_mmio_ring =
825 (struct kvm_coalesced_mmio_ring *)page_address(page);
826#endif
827
e930bffe
AA		 828#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
829 {
830 int err;
831 kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops;
832 err = mmu_notifier_register(&kvm->mmu_notifier, current->mm);
833 if (err) {
834#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
835 put_page(page);
836#endif
837 kfree(kvm);
838 return ERR_PTR(err);
839 }
840 }
841#endif
842
6d4e4c4f
AK		 843 kvm->mm = current->mm;
844 atomic_inc(&kvm->mm->mm_count);
aaee2c94 845 spin_lock_init(&kvm->mmu_lock);
74906345 846 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 847 mutex_init(&kvm->lock);
2eeb2e94 848 kvm_io_bus_init(&kvm->mmio_bus);
72dc67a6 849 init_rwsem(&kvm->slots_lock);
d39f13b0 850 atomic_set(&kvm->users_count, 1);
5e58cfe4
RR		 851 spin_lock(&kvm_lock);
852 list_add(&kvm->vm_list, &vm_list);
853 spin_unlock(&kvm_lock);
5f94c174
LV		 854#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
855 kvm_coalesced_mmio_init(kvm);
856#endif
d19a9cd2 857out:
f17abe9a
AK		 858 return kvm;
859}
860
6aa8b732
AK		 861/*
862 * Free any memory in @free but not in @dont.
863 */
864static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
865 struct kvm_memory_slot *dont)
866{
290fc38d
IE		 867 if (!dont || free->rmap != dont->rmap)
868 vfree(free->rmap);
6aa8b732
AK		 869
870 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
871 vfree(free->dirty_bitmap);
872
05da4558
MT		 873 if (!dont || free->lpage_info != dont->lpage_info)
874 vfree(free->lpage_info);
875
6aa8b732 876 free->npages = 0;
8b6d44c7 877 free->dirty_bitmap = NULL;
8d4e1288 878 free->rmap = NULL;
05da4558 879 free->lpage_info = NULL;
6aa8b732
AK		 880}
881
d19a9cd2 882void kvm_free_physmem(struct kvm *kvm)
6aa8b732
AK		 883{
884 int i;
885
886 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 887 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 888}
889
f17abe9a
AK		 890static void kvm_destroy_vm(struct kvm *kvm)
891{
6d4e4c4f
AK		 892 struct mm_struct *mm = kvm->mm;
893
133de902
AK		 894 spin_lock(&kvm_lock);
895 list_del(&kvm->vm_list);
896 spin_unlock(&kvm_lock);
74906345 897 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 898 kvm_io_bus_destroy(&kvm->mmio_bus);
5f94c174
LV		 899#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
900 if (kvm->coalesced_mmio_ring != NULL)
901 free_page((unsigned long)kvm->coalesced_mmio_ring);
e930bffe
AA		 902#endif
903#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
904 mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm);
5f94c174 905#endif
d19a9cd2 906 kvm_arch_destroy_vm(kvm);
6d4e4c4f 907 mmdrop(mm);
f17abe9a
AK		 908}
909
d39f13b0
IE		 910void kvm_get_kvm(struct kvm *kvm)
911{
912 atomic_inc(&kvm->users_count);
913}
914EXPORT_SYMBOL_GPL(kvm_get_kvm);
915
916void kvm_put_kvm(struct kvm *kvm)
917{
918 if (atomic_dec_and_test(&kvm->users_count))
919 kvm_destroy_vm(kvm);
920}
921EXPORT_SYMBOL_GPL(kvm_put_kvm);
922
923
f17abe9a
AK		 924static int kvm_vm_release(struct inode *inode, struct file *filp)
925{
926 struct kvm *kvm = filp->private_data;
927
d39f13b0 928 kvm_put_kvm(kvm);
6aa8b732
AK		 929 return 0;
930}
931
6aa8b732
AK		 932/*
933 * Allocate some memory and give it an address in the guest physical address
934 * space.
935 *
936 * Discontiguous memory is allowed, mostly for framebuffers.
f78e0e2e 937 *
10589a46 938 * Must be called holding mmap_sem for write.
6aa8b732 939 */
f78e0e2e
SY		 940int __kvm_set_memory_region(struct kvm *kvm,
941 struct kvm_userspace_memory_region *mem,
942 int user_alloc)
6aa8b732
AK		 943{
944 int r;
945 gfn_t base_gfn;
946 unsigned long npages;
947 unsigned long i;
948 struct kvm_memory_slot *memslot;
949 struct kvm_memory_slot old, new;
6aa8b732
AK		 950
951 r = -EINVAL;
952 /* General sanity checks */
953 if (mem->memory_size & (PAGE_SIZE - 1))
954 goto out;
955 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
956 goto out;
e7cacd40 957 if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1)))
78749809 958 goto out;
e0d62c7f 959 if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
6aa8b732
AK		 960 goto out;
961 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
962 goto out;
963
964 memslot = &kvm->memslots[mem->slot];
965 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
966 npages = mem->memory_size >> PAGE_SHIFT;
967
968 if (!npages)
969 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
970
6aa8b732
AK		 971 new = old = *memslot;
972
973 new.base_gfn = base_gfn;
974 new.npages = npages;
975 new.flags = mem->flags;
976
977 /* Disallow changing a memory slot's size. */
978 r = -EINVAL;
979 if (npages && old.npages && npages != old.npages)
f78e0e2e 980 goto out_free;
6aa8b732
AK		 981
982 /* Check for overlaps */
983 r = -EEXIST;
984 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
985 struct kvm_memory_slot *s = &kvm->memslots[i];
986
987 if (s == memslot)
988 continue;
989 if (!((base_gfn + npages <= s->base_gfn) ||
990 (base_gfn >= s->base_gfn + s->npages)))
f78e0e2e 991 goto out_free;
6aa8b732 992 }
6aa8b732 993
6aa8b732
AK		 994 /* Free page dirty bitmap if unneeded */
995 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 996 new.dirty_bitmap = NULL;
6aa8b732
AK		 997
998 r = -ENOMEM;
999
1000 /* Allocate if a slot is being created */
eff0114a 1001#ifndef CONFIG_S390
8d4e1288 1002 if (npages && !new.rmap) {
d77c26fc 1003 new.rmap = vmalloc(npages * sizeof(struct page *));
290fc38d
IE		 1004
1005 if (!new.rmap)
f78e0e2e 1006 goto out_free;
290fc38d 1007
290fc38d 1008 memset(new.rmap, 0, npages * sizeof(*new.rmap));
8d4e1288 1009
80b14b5b 1010 new.user_alloc = user_alloc;
604b38ac
AA		 1011 /*
1012 * hva_to_rmmap() serialzies with the mmu_lock and to be
1013 * safe it has to ignore memslots with !user_alloc &&
1014 * !userspace_addr.
1015 */
1016 if (user_alloc)
1017 new.userspace_addr = mem->userspace_addr;
1018 else
1019 new.userspace_addr = 0;
6aa8b732 1020 }
05da4558
MT		 1021 if (npages && !new.lpage_info) {
1022 int largepages = npages / KVM_PAGES_PER_HPAGE;
1023 if (npages % KVM_PAGES_PER_HPAGE)
1024 largepages++;
1025 if (base_gfn % KVM_PAGES_PER_HPAGE)
1026 largepages++;
1027
1028 new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info));
1029
1030 if (!new.lpage_info)
1031 goto out_free;
1032
1033 memset(new.lpage_info, 0, largepages * sizeof(*new.lpage_info));
1034
1035 if (base_gfn % KVM_PAGES_PER_HPAGE)
1036 new.lpage_info[0].write_count = 1;
1037 if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE)
1038 new.lpage_info[largepages-1].write_count = 1;
1039 }
6aa8b732
AK		 1040
1041 /* Allocate page dirty bitmap if needed */
1042 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
1043 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
1044
1045 new.dirty_bitmap = vmalloc(dirty_bytes);
1046 if (!new.dirty_bitmap)
f78e0e2e 1047 goto out_free;
6aa8b732
AK		 1048 memset(new.dirty_bitmap, 0, dirty_bytes);
1049 }
eff0114a 1050#endif /* not defined CONFIG_S390 */
6aa8b732 1051
34d4cb8f
MT		 1052 if (!npages)
1053 kvm_arch_flush_shadow(kvm);
1054
604b38ac
AA		 1055 spin_lock(&kvm->mmu_lock);
1056 if (mem->slot >= kvm->nmemslots)
1057 kvm->nmemslots = mem->slot + 1;
1058
3ad82a7e 1059 *memslot = new;
604b38ac 1060 spin_unlock(&kvm->mmu_lock);
3ad82a7e 1061
0de10343
ZX		 1062 r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);
1063 if (r) {
604b38ac 1064 spin_lock(&kvm->mmu_lock);
0de10343 1065 *memslot = old;
604b38ac 1066 spin_unlock(&kvm->mmu_lock);
0de10343 1067 goto out_free;
82ce2c96
IE		 1068 }
1069
6f897248
GC		 1070 kvm_free_physmem_slot(&old, npages ? &new : NULL);
1071 /* Slot deletion case: we have to update the current slot */
1072 if (!npages)
1073 *memslot = old;
8a98f664 1074#ifdef CONFIG_DMAR
62c476c7
BAY		 1075 /* map the pages in iommu page table */
1076 r = kvm_iommu_map_pages(kvm, base_gfn, npages);
1077 if (r)
1078 goto out;
8a98f664 1079#endif
6aa8b732
AK		 1080 return 0;
1081
f78e0e2e 1082out_free:
6aa8b732
AK		 1083 kvm_free_physmem_slot(&new, &old);
1084out:
1085 return r;
210c7c4d
IE		 1086
1087}
f78e0e2e
SY		 1088EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
1089
1090int kvm_set_memory_region(struct kvm *kvm,
1091 struct kvm_userspace_memory_region *mem,
1092 int user_alloc)
1093{
1094 int r;
1095
72dc67a6 1096 down_write(&kvm->slots_lock);
f78e0e2e 1097 r = __kvm_set_memory_region(kvm, mem, user_alloc);
72dc67a6 1098 up_write(&kvm->slots_lock);
f78e0e2e
SY		 1099 return r;
1100}
210c7c4d
IE		 1101EXPORT_SYMBOL_GPL(kvm_set_memory_region);
1102
1fe779f8
CO		 1103int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
1104 struct
1105 kvm_userspace_memory_region *mem,
1106 int user_alloc)
210c7c4d 1107{
e0d62c7f
IE		 1108 if (mem->slot >= KVM_MEMORY_SLOTS)
1109 return -EINVAL;
210c7c4d 1110 return kvm_set_memory_region(kvm, mem, user_alloc);
6aa8b732
AK		 1111}
1112
5bb064dc
ZX		 1113int kvm_get_dirty_log(struct kvm *kvm,
1114 struct kvm_dirty_log *log, int *is_dirty)
6aa8b732
AK		 1115{
1116 struct kvm_memory_slot *memslot;
1117 int r, i;
1118 int n;
1119 unsigned long any = 0;
1120
6aa8b732
AK		 1121 r = -EINVAL;
1122 if (log->slot >= KVM_MEMORY_SLOTS)
1123 goto out;
1124
1125 memslot = &kvm->memslots[log->slot];
1126 r = -ENOENT;
1127 if (!memslot->dirty_bitmap)
1128 goto out;
1129
cd1a4a98 1130 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 1131
cd1a4a98 1132 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 1133 any = memslot->dirty_bitmap[i];
1134
1135 r = -EFAULT;
1136 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
1137 goto out;
1138
5bb064dc
ZX		 1139 if (any)
1140 *is_dirty = 1;
6aa8b732
AK		 1141
1142 r = 0;
6aa8b732 1143out:
6aa8b732
AK		 1144 return r;
1145}
1146
cea7bb21
IE		 1147int is_error_page(struct page *page)
1148{
1149 return page == bad_page;
1150}
1151EXPORT_SYMBOL_GPL(is_error_page);
1152
35149e21
AL		 1153int is_error_pfn(pfn_t pfn)
1154{
1155 return pfn == bad_pfn;
1156}
1157EXPORT_SYMBOL_GPL(is_error_pfn);
1158
f9d46eb0
IE		 1159static inline unsigned long bad_hva(void)
1160{
1161 return PAGE_OFFSET;
1162}
1163
1164int kvm_is_error_hva(unsigned long addr)
1165{
1166 return addr == bad_hva();
1167}
1168EXPORT_SYMBOL_GPL(kvm_is_error_hva);
1169
2843099f 1170struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 1171{
1172 int i;
1173
1174 for (i = 0; i < kvm->nmemslots; ++i) {
1175 struct kvm_memory_slot *memslot = &kvm->memslots[i];
1176
1177 if (gfn >= memslot->base_gfn
1178 && gfn < memslot->base_gfn + memslot->npages)
1179 return memslot;
1180 }
8b6d44c7 1181 return NULL;
6aa8b732 1182}
2843099f 1183EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased);
e8207547
AK		 1184
1185struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
1186{
1187 gfn = unalias_gfn(kvm, gfn);
2843099f 1188 return gfn_to_memslot_unaliased(kvm, gfn);
e8207547 1189}
6aa8b732 1190
e0d62c7f
IE		 1191int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
1192{
1193 int i;
1194
1195 gfn = unalias_gfn(kvm, gfn);
1196 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
1197 struct kvm_memory_slot *memslot = &kvm->memslots[i];
1198
1199 if (gfn >= memslot->base_gfn
1200 && gfn < memslot->base_gfn + memslot->npages)
1201 return 1;
1202 }
1203 return 0;
1204}
1205EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
1206
05da4558 1207unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
539cb660
IE		 1208{
1209 struct kvm_memory_slot *slot;
1210
1211 gfn = unalias_gfn(kvm, gfn);
2843099f 1212 slot = gfn_to_memslot_unaliased(kvm, gfn);
539cb660
IE		 1213 if (!slot)
1214 return bad_hva();
1215 return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
1216}
0d150298 1217EXPORT_SYMBOL_GPL(gfn_to_hva);
539cb660 1218
35149e21 1219pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
954bbbc2 1220{
8d4e1288 1221 struct page *page[1];
539cb660 1222 unsigned long addr;
8d4e1288 1223 int npages;
2e2e3738 1224 pfn_t pfn;
954bbbc2 1225
60395224
AK		 1226 might_sleep();
1227
539cb660
IE		 1228 addr = gfn_to_hva(kvm, gfn);
1229 if (kvm_is_error_hva(addr)) {
8a7ae055 1230 get_page(bad_page);
35149e21 1231 return page_to_pfn(bad_page);
8a7ae055 1232 }
8d4e1288 1233
4c2155ce 1234 npages = get_user_pages_fast(addr, 1, 1, page);
539cb660 1235
2e2e3738
AL		 1236 if (unlikely(npages != 1)) {
1237 struct vm_area_struct *vma;
1238
4c2155ce 1239 down_read(&current->mm->mmap_sem);
2e2e3738 1240 vma = find_vma(current->mm, addr);
4c2155ce 1241
2e2e3738
AL		 1242 if (vma == NULL || addr < vma->vm_start ||
1243 !(vma->vm_flags & VM_PFNMAP)) {
4c2155ce 1244 up_read(&current->mm->mmap_sem);
2e2e3738
AL		 1245 get_page(bad_page);
1246 return page_to_pfn(bad_page);
1247 }
1248
1249 pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
4c2155ce 1250 up_read(&current->mm->mmap_sem);
c77fb9dc 1251 BUG_ON(!kvm_is_mmio_pfn(pfn));
2e2e3738
AL		 1252 } else
1253 pfn = page_to_pfn(page[0]);
8d4e1288 1254
2e2e3738 1255 return pfn;
35149e21
AL		 1256}
1257
1258EXPORT_SYMBOL_GPL(gfn_to_pfn);
1259
1260struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
1261{
2e2e3738
AL		 1262 pfn_t pfn;
1263
1264 pfn = gfn_to_pfn(kvm, gfn);
c77fb9dc 1265 if (!kvm_is_mmio_pfn(pfn))
2e2e3738
AL		 1266 return pfn_to_page(pfn);
1267
c77fb9dc 1268 WARN_ON(kvm_is_mmio_pfn(pfn));
2e2e3738
AL		 1269
1270 get_page(bad_page);
1271 return bad_page;
954bbbc2 1272}
aab61cc0 1273
954bbbc2
AK		 1274EXPORT_SYMBOL_GPL(gfn_to_page);
1275
b4231d61
IE		 1276void kvm_release_page_clean(struct page *page)
1277{
35149e21 1278 kvm_release_pfn_clean(page_to_pfn(page));
b4231d61
IE		 1279}
1280EXPORT_SYMBOL_GPL(kvm_release_page_clean);
1281
35149e21
AL		 1282void kvm_release_pfn_clean(pfn_t pfn)
1283{
c77fb9dc 1284 if (!kvm_is_mmio_pfn(pfn))
2e2e3738 1285 put_page(pfn_to_page(pfn));
35149e21
AL		 1286}
1287EXPORT_SYMBOL_GPL(kvm_release_pfn_clean);
1288
b4231d61 1289void kvm_release_page_dirty(struct page *page)
8a7ae055 1290{
35149e21
AL		 1291 kvm_release_pfn_dirty(page_to_pfn(page));
1292}
1293EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
1294
1295void kvm_release_pfn_dirty(pfn_t pfn)
1296{
1297 kvm_set_pfn_dirty(pfn);
1298 kvm_release_pfn_clean(pfn);
1299}
1300EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty);
1301
1302void kvm_set_page_dirty(struct page *page)
1303{
1304 kvm_set_pfn_dirty(page_to_pfn(page));
1305}
1306EXPORT_SYMBOL_GPL(kvm_set_page_dirty);
1307
1308void kvm_set_pfn_dirty(pfn_t pfn)
1309{
c77fb9dc 1310 if (!kvm_is_mmio_pfn(pfn)) {
2e2e3738
AL		 1311 struct page *page = pfn_to_page(pfn);
1312 if (!PageReserved(page))
1313 SetPageDirty(page);
1314 }
8a7ae055 1315}
35149e21
AL		 1316EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty);
1317
1318void kvm_set_pfn_accessed(pfn_t pfn)
1319{
c77fb9dc 1320 if (!kvm_is_mmio_pfn(pfn))
2e2e3738 1321 mark_page_accessed(pfn_to_page(pfn));
35149e21
AL		 1322}
1323EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed);
1324
1325void kvm_get_pfn(pfn_t pfn)
1326{
c77fb9dc 1327 if (!kvm_is_mmio_pfn(pfn))
2e2e3738 1328 get_page(pfn_to_page(pfn));
35149e21
AL		 1329}
1330EXPORT_SYMBOL_GPL(kvm_get_pfn);
8a7ae055 1331
195aefde
IE		 1332static int next_segment(unsigned long len, int offset)
1333{
1334 if (len > PAGE_SIZE - offset)
1335 return PAGE_SIZE - offset;
1336 else
1337 return len;
1338}
1339
1340int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
1341 int len)
1342{
e0506bcb
IE		 1343 int r;
1344 unsigned long addr;
195aefde 1345
e0506bcb
IE		 1346 addr = gfn_to_hva(kvm, gfn);
1347 if (kvm_is_error_hva(addr))
1348 return -EFAULT;
1349 r = copy_from_user(data, (void __user *)addr + offset, len);
1350 if (r)
195aefde 1351 return -EFAULT;
195aefde
IE		 1352 return 0;
1353}
1354EXPORT_SYMBOL_GPL(kvm_read_guest_page);
1355
1356int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
1357{
1358 gfn_t gfn = gpa >> PAGE_SHIFT;
1359 int seg;
1360 int offset = offset_in_page(gpa);
1361 int ret;
1362
1363 while ((seg = next_segment(len, offset)) != 0) {
1364 ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
1365 if (ret < 0)
1366 return ret;
1367 offset = 0;
1368 len -= seg;
1369 data += seg;
1370 ++gfn;
1371 }
1372 return 0;
1373}
1374EXPORT_SYMBOL_GPL(kvm_read_guest);
1375
7ec54588
MT		 1376int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
1377 unsigned long len)
1378{
1379 int r;
1380 unsigned long addr;
1381 gfn_t gfn = gpa >> PAGE_SHIFT;
1382 int offset = offset_in_page(gpa);
1383
1384 addr = gfn_to_hva(kvm, gfn);
1385 if (kvm_is_error_hva(addr))
1386 return -EFAULT;
0aac03f0 1387 pagefault_disable();
7ec54588 1388 r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len);
0aac03f0 1389 pagefault_enable();
7ec54588
MT		 1390 if (r)
1391 return -EFAULT;
1392 return 0;
1393}
1394EXPORT_SYMBOL(kvm_read_guest_atomic);
1395
195aefde
IE		 1396int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
1397 int offset, int len)
1398{
e0506bcb
IE		 1399 int r;
1400 unsigned long addr;
195aefde 1401
e0506bcb
IE		 1402 addr = gfn_to_hva(kvm, gfn);
1403 if (kvm_is_error_hva(addr))
1404 return -EFAULT;
1405 r = copy_to_user((void __user *)addr + offset, data, len);
1406 if (r)
195aefde 1407 return -EFAULT;
195aefde
IE		 1408 mark_page_dirty(kvm, gfn);
1409 return 0;
1410}
1411EXPORT_SYMBOL_GPL(kvm_write_guest_page);
1412
1413int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
1414 unsigned long len)
1415{
1416 gfn_t gfn = gpa >> PAGE_SHIFT;
1417 int seg;
1418 int offset = offset_in_page(gpa);
1419 int ret;
1420
1421 while ((seg = next_segment(len, offset)) != 0) {
1422 ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
1423 if (ret < 0)
1424 return ret;
1425 offset = 0;
1426 len -= seg;
1427 data += seg;
1428 ++gfn;
1429 }
1430 return 0;
1431}
1432
1433int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
1434{
3e021bf5 1435 return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
195aefde
IE		 1436}
1437EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
1438
1439int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
1440{
1441 gfn_t gfn = gpa >> PAGE_SHIFT;
1442 int seg;
1443 int offset = offset_in_page(gpa);
1444 int ret;
1445
1446 while ((seg = next_segment(len, offset)) != 0) {
1447 ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
1448 if (ret < 0)
1449 return ret;
1450 offset = 0;
1451 len -= seg;
1452 ++gfn;
1453 }
1454 return 0;
1455}
1456EXPORT_SYMBOL_GPL(kvm_clear_guest);
1457
6aa8b732
AK		 1458void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
1459{
31389947 1460 struct kvm_memory_slot *memslot;
6aa8b732 1461
3b6fff19 1462 gfn = unalias_gfn(kvm, gfn);
2843099f 1463 memslot = gfn_to_memslot_unaliased(kvm, gfn);
7e9d619d
RR		 1464 if (memslot && memslot->dirty_bitmap) {
1465 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 1466
7e9d619d
RR		 1467 /* avoid RMW */
1468 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
1469 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 1470 }
1471}
1472
b6958ce4
ED		 1473/*
1474 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1475 */
8776e519 1476void kvm_vcpu_block(struct kvm_vcpu *vcpu)
d3bef15f 1477{
e5c239cf
MT		 1478 DEFINE_WAIT(wait);
1479
1480 for (;;) {
1481 prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE);
1482
d7690175
MT		 1483 if (kvm_cpu_has_interrupt(vcpu) ||
1484 kvm_cpu_has_pending_timer(vcpu) ||
1485 kvm_arch_vcpu_runnable(vcpu)) {
1486 set_bit(KVM_REQ_UNHALT, &vcpu->requests);
e5c239cf 1487 break;
d7690175 1488 }
e5c239cf
MT		 1489 if (signal_pending(current))
1490 break;
1491
b6958ce4
ED		 1492 vcpu_put(vcpu);
1493 schedule();
1494 vcpu_load(vcpu);
1495 }
d3bef15f 1496
e5c239cf 1497 finish_wait(&vcpu->wq, &wait);
b6958ce4
ED		 1498}
1499
6aa8b732
AK		 1500void kvm_resched(struct kvm_vcpu *vcpu)
1501{
3fca0365
YD		 1502 if (!need_resched())
1503 return;
6aa8b732 1504 cond_resched();
6aa8b732
AK		 1505}
1506EXPORT_SYMBOL_GPL(kvm_resched);
1507
e4a533a4 1508static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
9a2bb7f4
AK		 1509{
1510 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
9a2bb7f4
AK		 1511 struct page *page;
1512
e4a533a4 1513 if (vmf->pgoff == 0)
039576c0 1514 page = virt_to_page(vcpu->run);
09566765 1515#ifdef CONFIG_X86
e4a533a4 1516 else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
ad312c7c 1517 page = virt_to_page(vcpu->arch.pio_data);
5f94c174
LV		 1518#endif
1519#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
1520 else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET)
1521 page = virt_to_page(vcpu->kvm->coalesced_mmio_ring);
09566765 1522#endif
039576c0 1523 else
e4a533a4 1524 return VM_FAULT_SIGBUS;
9a2bb7f4 1525 get_page(page);
e4a533a4 1526 vmf->page = page;
1527 return 0;
9a2bb7f4
AK		 1528}
1529
1530static struct vm_operations_struct kvm_vcpu_vm_ops = {
e4a533a4 1531 .fault = kvm_vcpu_fault,
9a2bb7f4
AK		 1532};
1533
1534static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
1535{
1536 vma->vm_ops = &kvm_vcpu_vm_ops;
1537 return 0;
1538}
1539
bccf2150
AK		 1540static int kvm_vcpu_release(struct inode *inode, struct file *filp)
1541{
1542 struct kvm_vcpu *vcpu = filp->private_data;
1543
66c0b394 1544 kvm_put_kvm(vcpu->kvm);
bccf2150
AK		 1545 return 0;
1546}
1547
3d3aab1b 1548static struct file_operations kvm_vcpu_fops = {
bccf2150
AK		 1549 .release = kvm_vcpu_release,
1550 .unlocked_ioctl = kvm_vcpu_ioctl,
1551 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 1552 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 1553};
1554
1555/*
1556 * Allocates an inode for the vcpu.
1557 */
1558static int create_vcpu_fd(struct kvm_vcpu *vcpu)
1559{
7d9dbca3 1560 int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0);
2030a42c 1561 if (fd < 0)
66c0b394 1562 kvm_put_kvm(vcpu->kvm);
bccf2150 1563 return fd;
bccf2150
AK		 1564}
1565
c5ea7660
AK		 1566/*
1567 * Creates some virtual cpus. Good luck creating more than one.
1568 */
1569static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
1570{
1571 int r;
1572 struct kvm_vcpu *vcpu;
1573
c5ea7660 1574 if (!valid_vcpu(n))
fb3f0f51 1575 return -EINVAL;
c5ea7660 1576
e9b11c17 1577 vcpu = kvm_arch_vcpu_create(kvm, n);
fb3f0f51
RR		 1578 if (IS_ERR(vcpu))
1579 return PTR_ERR(vcpu);
c5ea7660 1580
15ad7146
AK		 1581 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
1582
26e5215f
AK		 1583 r = kvm_arch_vcpu_setup(vcpu);
1584 if (r)
7d8fece6 1585 return r;
26e5215f 1586
11ec2804 1587 mutex_lock(&kvm->lock);
fb3f0f51
RR		 1588 if (kvm->vcpus[n]) {
1589 r = -EEXIST;
e9b11c17 1590 goto vcpu_destroy;
fb3f0f51
RR		 1591 }
1592 kvm->vcpus[n] = vcpu;
11ec2804 1593 mutex_unlock(&kvm->lock);
c5ea7660 1594
fb3f0f51 1595 /* Now it's all set up, let userspace reach it */
66c0b394 1596 kvm_get_kvm(kvm);
bccf2150
AK		 1597 r = create_vcpu_fd(vcpu);
1598 if (r < 0)
fb3f0f51
RR		 1599 goto unlink;
1600 return r;
39c3b86e 1601
fb3f0f51 1602unlink:
11ec2804 1603 mutex_lock(&kvm->lock);
fb3f0f51 1604 kvm->vcpus[n] = NULL;
e9b11c17 1605vcpu_destroy:
7d8fece6 1606 mutex_unlock(&kvm->lock);
d40ccc62 1607 kvm_arch_vcpu_destroy(vcpu);
c5ea7660
AK		 1608 return r;
1609}
1610
1961d276
AK		 1611static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
1612{
1613 if (sigset) {
1614 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
1615 vcpu->sigset_active = 1;
1616 vcpu->sigset = *sigset;
1617 } else
1618 vcpu->sigset_active = 0;
1619 return 0;
1620}
1621
bccf2150
AK		 1622static long kvm_vcpu_ioctl(struct file *filp,
1623 unsigned int ioctl, unsigned long arg)
6aa8b732 1624{
bccf2150 1625 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 1626 void __user *argp = (void __user *)arg;
313a3dc7 1627 int r;
fa3795a7
DH		 1628 struct kvm_fpu *fpu = NULL;
1629 struct kvm_sregs *kvm_sregs = NULL;
6aa8b732 1630
6d4e4c4f
AK		 1631 if (vcpu->kvm->mm != current->mm)
1632 return -EIO;
6aa8b732 1633 switch (ioctl) {
9a2bb7f4 1634 case KVM_RUN:
f0fe5108
AK		 1635 r = -EINVAL;
1636 if (arg)
1637 goto out;
b6c7a5dc 1638 r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 1639 break;
6aa8b732 1640 case KVM_GET_REGS: {
3e4bb3ac 1641 struct kvm_regs *kvm_regs;
6aa8b732 1642
3e4bb3ac
XZ		 1643 r = -ENOMEM;
1644 kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL);
1645 if (!kvm_regs)
6aa8b732 1646 goto out;
3e4bb3ac
XZ		 1647 r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs);
1648 if (r)
1649 goto out_free1;
6aa8b732 1650 r = -EFAULT;
3e4bb3ac
XZ		 1651 if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs)))
1652 goto out_free1;
6aa8b732 1653 r = 0;
3e4bb3ac
XZ		 1654out_free1:
1655 kfree(kvm_regs);
6aa8b732
AK		 1656 break;
1657 }
1658 case KVM_SET_REGS: {
3e4bb3ac 1659 struct kvm_regs *kvm_regs;
6aa8b732 1660
3e4bb3ac
XZ		 1661 r = -ENOMEM;
1662 kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL);
1663 if (!kvm_regs)
6aa8b732 1664 goto out;
3e4bb3ac
XZ		 1665 r = -EFAULT;
1666 if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs)))
1667 goto out_free2;
1668 r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs);
6aa8b732 1669 if (r)
3e4bb3ac 1670 goto out_free2;
6aa8b732 1671 r = 0;
3e4bb3ac
XZ		 1672out_free2:
1673 kfree(kvm_regs);
6aa8b732
AK		 1674 break;
1675 }
1676 case KVM_GET_SREGS: {
fa3795a7
DH		 1677 kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL);
1678 r = -ENOMEM;
1679 if (!kvm_sregs)
1680 goto out;
1681 r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs);
6aa8b732
AK		 1682 if (r)
1683 goto out;
1684 r = -EFAULT;
fa3795a7 1685 if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs)))
6aa8b732
AK		 1686 goto out;
1687 r = 0;
1688 break;
1689 }
1690 case KVM_SET_SREGS: {
fa3795a7
DH		 1691 kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL);
1692 r = -ENOMEM;
1693 if (!kvm_sregs)
1694 goto out;
6aa8b732 1695 r = -EFAULT;
fa3795a7 1696 if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs)))
6aa8b732 1697 goto out;
fa3795a7 1698 r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs);
6aa8b732
AK		 1699 if (r)
1700 goto out;
1701 r = 0;
1702 break;
1703 }
62d9f0db
MT		 1704 case KVM_GET_MP_STATE: {
1705 struct kvm_mp_state mp_state;
1706
1707 r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state);
1708 if (r)
1709 goto out;
1710 r = -EFAULT;
1711 if (copy_to_user(argp, &mp_state, sizeof mp_state))
1712 goto out;
1713 r = 0;
1714 break;
1715 }
1716 case KVM_SET_MP_STATE: {
1717 struct kvm_mp_state mp_state;
1718
1719 r = -EFAULT;
1720 if (copy_from_user(&mp_state, argp, sizeof mp_state))
1721 goto out;
1722 r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state);
1723 if (r)
1724 goto out;
1725 r = 0;
1726 break;
1727 }
6aa8b732
AK		 1728 case KVM_TRANSLATE: {
1729 struct kvm_translation tr;
1730
1731 r = -EFAULT;
2f366987 1732 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 1733 goto out;
8b006791 1734 r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 1735 if (r)
1736 goto out;
1737 r = -EFAULT;
2f366987 1738 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 1739 goto out;
1740 r = 0;
1741 break;
1742 }
6aa8b732
AK		 1743 case KVM_DEBUG_GUEST: {
1744 struct kvm_debug_guest dbg;
1745
1746 r = -EFAULT;
2f366987 1747 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 1748 goto out;
b6c7a5dc 1749 r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 1750 if (r)
1751 goto out;
1752 r = 0;
1753 break;
1754 }
1961d276
AK		 1755 case KVM_SET_SIGNAL_MASK: {
1756 struct kvm_signal_mask __user *sigmask_arg = argp;
1757 struct kvm_signal_mask kvm_sigmask;
1758 sigset_t sigset, *p;
1759
1760 p = NULL;
1761 if (argp) {
1762 r = -EFAULT;
1763 if (copy_from_user(&kvm_sigmask, argp,
1764 sizeof kvm_sigmask))
1765 goto out;
1766 r = -EINVAL;
1767 if (kvm_sigmask.len != sizeof sigset)
1768 goto out;
1769 r = -EFAULT;
1770 if (copy_from_user(&sigset, sigmask_arg->sigset,
1771 sizeof sigset))
1772 goto out;
1773 p = &sigset;
1774 }
1775 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
1776 break;
1777 }
b8836737 1778 case KVM_GET_FPU: {
fa3795a7
DH		 1779 fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL);
1780 r = -ENOMEM;
1781 if (!fpu)
1782 goto out;
1783 r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu);
b8836737
AK		 1784 if (r)
1785 goto out;
1786 r = -EFAULT;
fa3795a7 1787 if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu)))
b8836737
AK		 1788 goto out;
1789 r = 0;
1790 break;
1791 }
1792 case KVM_SET_FPU: {
fa3795a7
DH		 1793 fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL);
1794 r = -ENOMEM;
1795 if (!fpu)
1796 goto out;
b8836737 1797 r = -EFAULT;
fa3795a7 1798 if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu)))
b8836737 1799 goto out;
fa3795a7 1800 r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu);
b8836737
AK		 1801 if (r)
1802 goto out;
1803 r = 0;
1804 break;
1805 }
bccf2150 1806 default:
313a3dc7 1807 r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
bccf2150
AK		 1808 }
1809out:
fa3795a7
DH		 1810 kfree(fpu);
1811 kfree(kvm_sregs);
bccf2150
AK		 1812 return r;
1813}
1814
1815static long kvm_vm_ioctl(struct file *filp,
1816 unsigned int ioctl, unsigned long arg)
1817{
1818 struct kvm *kvm = filp->private_data;
1819 void __user *argp = (void __user *)arg;
1fe779f8 1820 int r;
bccf2150 1821
6d4e4c4f
AK		 1822 if (kvm->mm != current->mm)
1823 return -EIO;
bccf2150
AK		 1824 switch (ioctl) {
1825 case KVM_CREATE_VCPU:
1826 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
1827 if (r < 0)
1828 goto out;
1829 break;
6fc138d2
IE		 1830 case KVM_SET_USER_MEMORY_REGION: {
1831 struct kvm_userspace_memory_region kvm_userspace_mem;
1832
1833 r = -EFAULT;
1834 if (copy_from_user(&kvm_userspace_mem, argp,
1835 sizeof kvm_userspace_mem))
1836 goto out;
1837
1838 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
6aa8b732
AK		 1839 if (r)
1840 goto out;
1841 break;
1842 }
1843 case KVM_GET_DIRTY_LOG: {
1844 struct kvm_dirty_log log;
1845
1846 r = -EFAULT;
2f366987 1847 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 1848 goto out;
2c6f5df9 1849 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 1850 if (r)
1851 goto out;
1852 break;
1853 }
5f94c174
LV		 1854#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
1855 case KVM_REGISTER_COALESCED_MMIO: {
1856 struct kvm_coalesced_mmio_zone zone;
1857 r = -EFAULT;
1858 if (copy_from_user(&zone, argp, sizeof zone))
1859 goto out;
1860 r = -ENXIO;
1861 r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone);
1862 if (r)
1863 goto out;
1864 r = 0;
1865 break;
1866 }
1867 case KVM_UNREGISTER_COALESCED_MMIO: {
1868 struct kvm_coalesced_mmio_zone zone;
1869 r = -EFAULT;
1870 if (copy_from_user(&zone, argp, sizeof zone))
1871 goto out;
1872 r = -ENXIO;
1873 r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone);
1874 if (r)
1875 goto out;
1876 r = 0;
1877 break;
1878 }
8a98f664
XZ		 1879#endif
1880#ifdef KVM_CAP_DEVICE_ASSIGNMENT
1881 case KVM_ASSIGN_PCI_DEVICE: {
1882 struct kvm_assigned_pci_dev assigned_dev;
1883
1884 r = -EFAULT;
1885 if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
1886 goto out;
1887 r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
1888 if (r)
1889 goto out;
1890 break;
1891 }
1892 case KVM_ASSIGN_IRQ: {
1893 struct kvm_assigned_irq assigned_irq;
1894
1895 r = -EFAULT;
1896 if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
1897 goto out;
1898 r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
1899 if (r)
1900 goto out;
1901 break;
1902 }
0a920356
WH		 1903#endif
1904#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
1905 case KVM_DEASSIGN_PCI_DEVICE: {
1906 struct kvm_assigned_pci_dev assigned_dev;
1907
1908 r = -EFAULT;
1909 if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
1910 goto out;
1911 r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
1912 if (r)
1913 goto out;
1914 break;
1915 }
5f94c174 1916#endif
f17abe9a 1917 default:
1fe779f8 1918 r = kvm_arch_vm_ioctl(filp, ioctl, arg);
f17abe9a
AK		 1919 }
1920out:
1921 return r;
1922}
1923
e4a533a4 1924static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
f17abe9a 1925{
777b3f49
MT		 1926 struct page *page[1];
1927 unsigned long addr;
1928 int npages;
1929 gfn_t gfn = vmf->pgoff;
f17abe9a 1930 struct kvm *kvm = vma->vm_file->private_data;
f17abe9a 1931
777b3f49
MT		 1932 addr = gfn_to_hva(kvm, gfn);
1933 if (kvm_is_error_hva(addr))
e4a533a4 1934 return VM_FAULT_SIGBUS;
777b3f49
MT		 1935
1936 npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page,
1937 NULL);
1938 if (unlikely(npages != 1))
e4a533a4 1939 return VM_FAULT_SIGBUS;
777b3f49
MT		 1940
1941 vmf->page = page[0];
e4a533a4 1942 return 0;
f17abe9a
AK		 1943}
1944
1945static struct vm_operations_struct kvm_vm_vm_ops = {
e4a533a4 1946 .fault = kvm_vm_fault,
f17abe9a
AK		 1947};
1948
1949static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
1950{
1951 vma->vm_ops = &kvm_vm_vm_ops;
1952 return 0;
1953}
1954
3d3aab1b 1955static struct file_operations kvm_vm_fops = {
f17abe9a
AK		 1956 .release = kvm_vm_release,
1957 .unlocked_ioctl = kvm_vm_ioctl,
1958 .compat_ioctl = kvm_vm_ioctl,
1959 .mmap = kvm_vm_mmap,
1960};
1961
1962static int kvm_dev_ioctl_create_vm(void)
1963{
2030a42c 1964 int fd;
f17abe9a
AK		 1965 struct kvm *kvm;
1966
f17abe9a 1967 kvm = kvm_create_vm();
d6d28168
AK		 1968 if (IS_ERR(kvm))
1969 return PTR_ERR(kvm);
7d9dbca3 1970 fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0);
2030a42c 1971 if (fd < 0)
66c0b394 1972 kvm_put_kvm(kvm);
f17abe9a 1973
f17abe9a 1974 return fd;
f17abe9a
AK		 1975}
1976
1a811b61
AK		 1977static long kvm_dev_ioctl_check_extension_generic(long arg)
1978{
1979 switch (arg) {
ca9edaee 1980 case KVM_CAP_USER_MEMORY:
1a811b61
AK		 1981 case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
1982 return 1;
1983 default:
1984 break;
1985 }
1986 return kvm_dev_ioctl_check_extension(arg);
1987}
1988
f17abe9a
AK		 1989static long kvm_dev_ioctl(struct file *filp,
1990 unsigned int ioctl, unsigned long arg)
1991{
07c45a36 1992 long r = -EINVAL;
f17abe9a
AK		 1993
1994 switch (ioctl) {
1995 case KVM_GET_API_VERSION:
f0fe5108
AK		 1996 r = -EINVAL;
1997 if (arg)
1998 goto out;
f17abe9a
AK		 1999 r = KVM_API_VERSION;
2000 break;
2001 case KVM_CREATE_VM:
f0fe5108
AK		 2002 r = -EINVAL;
2003 if (arg)
2004 goto out;
f17abe9a
AK		 2005 r = kvm_dev_ioctl_create_vm();
2006 break;
018d00d2 2007 case KVM_CHECK_EXTENSION:
1a811b61 2008 r = kvm_dev_ioctl_check_extension_generic(arg);
5d308f45 2009 break;
07c45a36
AK		 2010 case KVM_GET_VCPU_MMAP_SIZE:
2011 r = -EINVAL;
2012 if (arg)
2013 goto out;
adb1ff46
AK		 2014 r = PAGE_SIZE; /* struct kvm_run */
2015#ifdef CONFIG_X86
2016 r += PAGE_SIZE; /* pio data page */
5f94c174
LV		 2017#endif
2018#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
2019 r += PAGE_SIZE; /* coalesced mmio ring page */
adb1ff46 2020#endif
07c45a36 2021 break;
d4c9ff2d
FEL		 2022 case KVM_TRACE_ENABLE:
2023 case KVM_TRACE_PAUSE:
2024 case KVM_TRACE_DISABLE:
2025 r = kvm_trace_ioctl(ioctl, arg);
2026 break;
6aa8b732 2027 default:
043405e1 2028 return kvm_arch_dev_ioctl(filp, ioctl, arg);
6aa8b732
AK		 2029 }
2030out:
2031 return r;
2032}
2033
6aa8b732 2034static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 2035 .unlocked_ioctl = kvm_dev_ioctl,
2036 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 2037};
2038
2039static struct miscdevice kvm_dev = {
bbe4432e 2040 KVM_MINOR,
6aa8b732
AK		 2041 "kvm",
2042 &kvm_chardev_ops,
2043};
2044
1b6c0168
AK		 2045static void hardware_enable(void *junk)
2046{
2047 int cpu = raw_smp_processor_id();
2048
7f59f492 2049 if (cpumask_test_cpu(cpu, cpus_hardware_enabled))
1b6c0168 2050 return;
7f59f492 2051 cpumask_set_cpu(cpu, cpus_hardware_enabled);
e9b11c17 2052 kvm_arch_hardware_enable(NULL);
1b6c0168
AK		 2053}
2054
2055static void hardware_disable(void *junk)
2056{
2057 int cpu = raw_smp_processor_id();
2058
7f59f492 2059 if (!cpumask_test_cpu(cpu, cpus_hardware_enabled))
1b6c0168 2060 return;
7f59f492 2061 cpumask_clear_cpu(cpu, cpus_hardware_enabled);
e9b11c17 2062 kvm_arch_hardware_disable(NULL);
1b6c0168
AK		 2063}
2064
774c47f1
AK		 2065static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
2066 void *v)
2067{
2068 int cpu = (long)v;
2069
1a6f4d7f 2070 val &= ~CPU_TASKS_FROZEN;
774c47f1 2071 switch (val) {
cec9ad27 2072 case CPU_DYING:
6ec8a856
AK		 2073 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
2074 cpu);
2075 hardware_disable(NULL);
2076 break;
774c47f1 2077 case CPU_UP_CANCELED:
43934a38
JK		 2078 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
2079 cpu);
8691e5a8 2080 smp_call_function_single(cpu, hardware_disable, NULL, 1);
774c47f1 2081 break;
43934a38
JK		 2082 case CPU_ONLINE:
2083 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
2084 cpu);
8691e5a8 2085 smp_call_function_single(cpu, hardware_enable, NULL, 1);
774c47f1
AK		 2086 break;
2087 }
2088 return NOTIFY_OK;
2089}
2090
4ecac3fd
AK		 2091
2092asmlinkage void kvm_handle_fault_on_reboot(void)
2093{
2094 if (kvm_rebooting)
2095 /* spin while reset goes on */
2096 while (true)
2097 ;
2098 /* Fault while not rebooting. We want the trace. */
2099 BUG();
2100}
2101EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot);
2102
9a2b85c6 2103static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
d77c26fc 2104 void *v)
9a2b85c6
RR		 2105{
2106 if (val == SYS_RESTART) {
2107 /*
2108 * Some (well, at least mine) BIOSes hang on reboot if
2109 * in vmx root mode.
2110 */
2111 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
4ecac3fd 2112 kvm_rebooting = true;
15c8b6c1 2113 on_each_cpu(hardware_disable, NULL, 1);
9a2b85c6
RR		 2114 }
2115 return NOTIFY_OK;
2116}
2117
2118static struct notifier_block kvm_reboot_notifier = {
2119 .notifier_call = kvm_reboot,
2120 .priority = 0,
2121};
2122
2eeb2e94
GH		 2123void kvm_io_bus_init(struct kvm_io_bus *bus)
2124{
2125 memset(bus, 0, sizeof(*bus));
2126}
2127
2128void kvm_io_bus_destroy(struct kvm_io_bus *bus)
2129{
2130 int i;
2131
2132 for (i = 0; i < bus->dev_count; i++) {
2133 struct kvm_io_device *pos = bus->devs[i];
2134
2135 kvm_iodevice_destructor(pos);
2136 }
2137}
2138
92760499
LV		 2139struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
2140 gpa_t addr, int len, int is_write)
2eeb2e94
GH		 2141{
2142 int i;
2143
2144 for (i = 0; i < bus->dev_count; i++) {
2145 struct kvm_io_device *pos = bus->devs[i];
2146
92760499 2147 if (pos->in_range(pos, addr, len, is_write))
2eeb2e94
GH		 2148 return pos;
2149 }
2150
2151 return NULL;
2152}
2153
2154void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
2155{
2156 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
2157
2158 bus->devs[bus->dev_count++] = dev;
2159}
2160
774c47f1
AK		 2161static struct notifier_block kvm_cpu_notifier = {
2162 .notifier_call = kvm_cpu_hotplug,
2163 .priority = 20, /* must be > scheduler priority */
2164};
2165
8b88b099 2166static int vm_stat_get(void *_offset, u64 *val)
ba1389b7
AK		 2167{
2168 unsigned offset = (long)_offset;
ba1389b7
AK		 2169 struct kvm *kvm;
2170
8b88b099 2171 *val = 0;
ba1389b7
AK		 2172 spin_lock(&kvm_lock);
2173 list_for_each_entry(kvm, &vm_list, vm_list)
8b88b099 2174 *val += *(u32 *)((void *)kvm + offset);
ba1389b7 2175 spin_unlock(&kvm_lock);
8b88b099 2176 return 0;
ba1389b7
AK		 2177}
2178
2179DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n");
2180
8b88b099 2181static int vcpu_stat_get(void *_offset, u64 *val)
1165f5fe
AK		 2182{
2183 unsigned offset = (long)_offset;
1165f5fe
AK		 2184 struct kvm *kvm;
2185 struct kvm_vcpu *vcpu;
2186 int i;
2187
8b88b099 2188 *val = 0;
1165f5fe
AK		 2189 spin_lock(&kvm_lock);
2190 list_for_each_entry(kvm, &vm_list, vm_list)
2191 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 2192 vcpu = kvm->vcpus[i];
2193 if (vcpu)
8b88b099 2194 *val += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 2195 }
2196 spin_unlock(&kvm_lock);
8b88b099 2197 return 0;
1165f5fe
AK		 2198}
2199
ba1389b7
AK		 2200DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n");
2201
2202static struct file_operations *stat_fops[] = {
2203 [KVM_STAT_VCPU] = &vcpu_stat_fops,
2204 [KVM_STAT_VM] = &vm_stat_fops,
2205};
1165f5fe 2206
a16b043c 2207static void kvm_init_debug(void)
6aa8b732
AK		 2208{
2209 struct kvm_stats_debugfs_item *p;
2210
76f7c879 2211 kvm_debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 2212 for (p = debugfs_entries; p->name; ++p)
76f7c879 2213 p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir,
1165f5fe 2214 (void *)(long)p->offset,
ba1389b7 2215 stat_fops[p->kind]);
6aa8b732
AK		 2216}
2217
2218static void kvm_exit_debug(void)
2219{
2220 struct kvm_stats_debugfs_item *p;
2221
2222 for (p = debugfs_entries; p->name; ++p)
2223 debugfs_remove(p->dentry);
76f7c879 2224 debugfs_remove(kvm_debugfs_dir);
6aa8b732
AK		 2225}
2226
59ae6c6b
AK		 2227static int kvm_suspend(struct sys_device *dev, pm_message_t state)
2228{
4267c41a 2229 hardware_disable(NULL);
59ae6c6b
AK		 2230 return 0;
2231}
2232
2233static int kvm_resume(struct sys_device *dev)
2234{
4267c41a 2235 hardware_enable(NULL);
59ae6c6b
AK		 2236 return 0;
2237}
2238
2239static struct sysdev_class kvm_sysdev_class = {
af5ca3f4 2240 .name = "kvm",
59ae6c6b
AK		 2241 .suspend = kvm_suspend,
2242 .resume = kvm_resume,
2243};
2244
2245static struct sys_device kvm_sysdev = {
2246 .id = 0,
2247 .cls = &kvm_sysdev_class,
2248};
2249
cea7bb21 2250struct page *bad_page;
35149e21 2251pfn_t bad_pfn;
6aa8b732 2252
15ad7146
AK		 2253static inline
2254struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
2255{
2256 return container_of(pn, struct kvm_vcpu, preempt_notifier);
2257}
2258
2259static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
2260{
2261 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
2262
e9b11c17 2263 kvm_arch_vcpu_load(vcpu, cpu);
15ad7146
AK		 2264}
2265
2266static void kvm_sched_out(struct preempt_notifier *pn,
2267 struct task_struct *next)
2268{
2269 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
2270
e9b11c17 2271 kvm_arch_vcpu_put(vcpu);
15ad7146
AK		 2272}
2273
f8c16bba 2274int kvm_init(void *opaque, unsigned int vcpu_size,
c16f862d 2275 struct module *module)
6aa8b732
AK		 2276{
2277 int r;
002c7f7c 2278 int cpu;
6aa8b732 2279
cb498ea2
ZX		 2280 kvm_init_debug();
2281
f8c16bba
ZX		 2282 r = kvm_arch_init(opaque);
2283 if (r)
d2308784 2284 goto out_fail;
cb498ea2
ZX		 2285
2286 bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
2287
2288 if (bad_page == NULL) {
2289 r = -ENOMEM;
2290 goto out;
2291 }
2292
35149e21
AL		 2293 bad_pfn = page_to_pfn(bad_page);
2294
7f59f492
RR		 2295 if (!alloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) {
2296 r = -ENOMEM;
2297 goto out_free_0;
2298 }
2299
e9b11c17 2300 r = kvm_arch_hardware_setup();
6aa8b732 2301 if (r < 0)
7f59f492 2302 goto out_free_0a;
6aa8b732 2303
002c7f7c
YS		 2304 for_each_online_cpu(cpu) {
2305 smp_call_function_single(cpu,
e9b11c17 2306 kvm_arch_check_processor_compat,
8691e5a8 2307 &r, 1);
002c7f7c 2308 if (r < 0)
d2308784 2309 goto out_free_1;
002c7f7c
YS		 2310 }
2311
15c8b6c1 2312 on_each_cpu(hardware_enable, NULL, 1);
774c47f1
AK		 2313 r = register_cpu_notifier(&kvm_cpu_notifier);
2314 if (r)
d2308784 2315 goto out_free_2;
6aa8b732
AK		 2316 register_reboot_notifier(&kvm_reboot_notifier);
2317
59ae6c6b
AK		 2318 r = sysdev_class_register(&kvm_sysdev_class);
2319 if (r)
d2308784 2320 goto out_free_3;
59ae6c6b
AK		 2321
2322 r = sysdev_register(&kvm_sysdev);
2323 if (r)
d2308784 2324 goto out_free_4;
59ae6c6b 2325
c16f862d
RR		 2326 /* A kmem cache lets us meet the alignment requirements of fx_save. */
2327 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
56919c5c
JP		 2328 __alignof__(struct kvm_vcpu),
2329 0, NULL);
c16f862d
RR		 2330 if (!kvm_vcpu_cache) {
2331 r = -ENOMEM;
d2308784 2332 goto out_free_5;
c16f862d
RR		 2333 }
2334
6aa8b732 2335 kvm_chardev_ops.owner = module;
3d3aab1b
CB		 2336 kvm_vm_fops.owner = module;
2337 kvm_vcpu_fops.owner = module;
6aa8b732
AK		 2338
2339 r = misc_register(&kvm_dev);
2340 if (r) {
d77c26fc 2341 printk(KERN_ERR "kvm: misc device register failed\n");
6aa8b732
AK		 2342 goto out_free;
2343 }
2344
15ad7146
AK		 2345 kvm_preempt_ops.sched_in = kvm_sched_in;
2346 kvm_preempt_ops.sched_out = kvm_sched_out;
5319c662
SY		 2347#ifndef CONFIG_X86
2348 msi2intx = 0;
2349#endif
15ad7146 2350
c7addb90 2351 return 0;
6aa8b732
AK		 2352
2353out_free:
c16f862d 2354 kmem_cache_destroy(kvm_vcpu_cache);
d2308784 2355out_free_5:
59ae6c6b 2356 sysdev_unregister(&kvm_sysdev);
d2308784 2357out_free_4:
59ae6c6b 2358 sysdev_class_unregister(&kvm_sysdev_class);
d2308784 2359out_free_3:
6aa8b732 2360 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1 2361 unregister_cpu_notifier(&kvm_cpu_notifier);
d2308784 2362out_free_2:
15c8b6c1 2363 on_each_cpu(hardware_disable, NULL, 1);
d2308784 2364out_free_1:
e9b11c17 2365 kvm_arch_hardware_unsetup();
7f59f492
RR		 2366out_free_0a:
2367 free_cpumask_var(cpus_hardware_enabled);
d2308784
ZX		 2368out_free_0:
2369 __free_page(bad_page);
ca45aaae 2370out:
f8c16bba 2371 kvm_arch_exit();
cb498ea2 2372 kvm_exit_debug();
d2308784 2373out_fail:
6aa8b732
AK		 2374 return r;
2375}
cb498ea2 2376EXPORT_SYMBOL_GPL(kvm_init);
6aa8b732 2377
cb498ea2 2378void kvm_exit(void)
6aa8b732 2379{
d4c9ff2d 2380 kvm_trace_cleanup();
6aa8b732 2381 misc_deregister(&kvm_dev);
c16f862d 2382 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 2383 sysdev_unregister(&kvm_sysdev);
2384 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 2385 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 2386 unregister_cpu_notifier(&kvm_cpu_notifier);
15c8b6c1 2387 on_each_cpu(hardware_disable, NULL, 1);
e9b11c17 2388 kvm_arch_hardware_unsetup();
f8c16bba 2389 kvm_arch_exit();
6aa8b732 2390 kvm_exit_debug();
7f59f492 2391 free_cpumask_var(cpus_hardware_enabled);
cea7bb21 2392 __free_page(bad_page);
6aa8b732 2393}
cb498ea2 2394EXPORT_SYMBOL_GPL(kvm_exit);