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Commit | Line | Data |
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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 |
64 | MODULE_AUTHOR("Qumranet"); |
65 | MODULE_LICENSE("GPL"); | |
66 | ||
5319c662 SY |
67 | static int msi2intx = 1; |
68 | module_param(msi2intx, bool, 0); | |
69 | ||
e9b11c17 ZX |
70 | DEFINE_SPINLOCK(kvm_lock); |
71 | LIST_HEAD(vm_list); | |
133de902 | 72 | |
1b6c0168 AK |
73 | static cpumask_t cpus_hardware_enabled; |
74 | ||
c16f862d RR |
75 | struct kmem_cache *kvm_vcpu_cache; |
76 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 77 | |
15ad7146 AK |
78 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
79 | ||
76f7c879 | 80 | struct dentry *kvm_debugfs_dir; |
6aa8b732 | 81 | |
bccf2150 AK |
82 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
83 | unsigned long arg); | |
84 | ||
e8ba5d31 | 85 | static bool kvm_rebooting; |
4ecac3fd | 86 | |
8a98f664 | 87 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
f64769eb SY |
88 | |
89 | #ifdef CONFIG_X86 | |
90 | static 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 | |
136 | static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev) {} | |
137 | #endif | |
138 | ||
8a98f664 XZ |
139 | static 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 | ||
153 | static 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); | |
173 | } | |
8a98f664 XZ |
174 | mutex_unlock(&assigned_dev->kvm->lock); |
175 | kvm_put_kvm(assigned_dev->kvm); | |
176 | } | |
177 | ||
8a98f664 XZ |
178 | static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) |
179 | { | |
180 | struct kvm_assigned_dev_kernel *assigned_dev = | |
181 | (struct kvm_assigned_dev_kernel *) dev_id; | |
182 | ||
183 | kvm_get_kvm(assigned_dev->kvm); | |
184 | schedule_work(&assigned_dev->interrupt_work); | |
185 | disable_irq_nosync(irq); | |
186 | return IRQ_HANDLED; | |
187 | } | |
188 | ||
189 | /* Ack the irq line for an assigned device */ | |
190 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) | |
191 | { | |
192 | struct kvm_assigned_dev_kernel *dev; | |
193 | ||
194 | if (kian->gsi == -1) | |
195 | return; | |
196 | ||
197 | dev = container_of(kian, struct kvm_assigned_dev_kernel, | |
198 | ack_notifier); | |
5550af4d | 199 | kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); |
8a98f664 XZ |
200 | enable_irq(dev->host_irq); |
201 | } | |
202 | ||
4a643be8 MM |
203 | static void kvm_free_assigned_irq(struct kvm *kvm, |
204 | struct kvm_assigned_dev_kernel *assigned_dev) | |
8a98f664 | 205 | { |
4a643be8 MM |
206 | if (!irqchip_in_kernel(kvm)) |
207 | return; | |
8a98f664 | 208 | |
e19e30ef | 209 | kvm_unregister_irq_ack_notifier(&assigned_dev->ack_notifier); |
f29b2673 MM |
210 | |
211 | if (assigned_dev->irq_source_id != -1) | |
212 | kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); | |
213 | assigned_dev->irq_source_id = -1; | |
8a98f664 | 214 | |
4a643be8 MM |
215 | if (!assigned_dev->irq_requested_type) |
216 | return; | |
217 | ||
8a98f664 XZ |
218 | if (cancel_work_sync(&assigned_dev->interrupt_work)) |
219 | /* We had pending work. That means we will have to take | |
220 | * care of kvm_put_kvm. | |
221 | */ | |
222 | kvm_put_kvm(kvm); | |
223 | ||
4a643be8 MM |
224 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); |
225 | ||
226 | if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) | |
227 | pci_disable_msi(assigned_dev->dev); | |
228 | ||
229 | assigned_dev->irq_requested_type = 0; | |
230 | } | |
231 | ||
232 | ||
233 | static void kvm_free_assigned_device(struct kvm *kvm, | |
234 | struct kvm_assigned_dev_kernel | |
235 | *assigned_dev) | |
236 | { | |
237 | kvm_free_assigned_irq(kvm, assigned_dev); | |
238 | ||
6eb55818 SY |
239 | pci_reset_function(assigned_dev->dev); |
240 | ||
8a98f664 XZ |
241 | pci_release_regions(assigned_dev->dev); |
242 | pci_disable_device(assigned_dev->dev); | |
243 | pci_dev_put(assigned_dev->dev); | |
244 | ||
245 | list_del(&assigned_dev->list); | |
246 | kfree(assigned_dev); | |
247 | } | |
248 | ||
249 | void kvm_free_all_assigned_devices(struct kvm *kvm) | |
250 | { | |
251 | struct list_head *ptr, *ptr2; | |
252 | struct kvm_assigned_dev_kernel *assigned_dev; | |
253 | ||
254 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { | |
255 | assigned_dev = list_entry(ptr, | |
256 | struct kvm_assigned_dev_kernel, | |
257 | list); | |
258 | ||
259 | kvm_free_assigned_device(kvm, assigned_dev); | |
260 | } | |
261 | } | |
262 | ||
00e3ed39 SY |
263 | static int assigned_device_update_intx(struct kvm *kvm, |
264 | struct kvm_assigned_dev_kernel *adev, | |
265 | struct kvm_assigned_irq *airq) | |
266 | { | |
fbac7818 SY |
267 | adev->guest_irq = airq->guest_irq; |
268 | adev->ack_notifier.gsi = airq->guest_irq; | |
269 | ||
270 | if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_INTX) | |
00e3ed39 | 271 | return 0; |
00e3ed39 SY |
272 | |
273 | if (irqchip_in_kernel(kvm)) { | |
5319c662 SY |
274 | if (!msi2intx && |
275 | adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) { | |
6b9cc7fd SY |
276 | free_irq(adev->host_irq, (void *)kvm); |
277 | pci_disable_msi(adev->dev); | |
278 | } | |
279 | ||
00e3ed39 SY |
280 | if (!capable(CAP_SYS_RAWIO)) |
281 | return -EPERM; | |
282 | ||
283 | if (airq->host_irq) | |
284 | adev->host_irq = airq->host_irq; | |
285 | else | |
286 | adev->host_irq = adev->dev->irq; | |
00e3ed39 SY |
287 | |
288 | /* Even though this is PCI, we don't want to use shared | |
289 | * interrupts. Sharing host devices with guest-assigned devices | |
290 | * on the same interrupt line is not a happy situation: there | |
291 | * are going to be long delays in accepting, acking, etc. | |
292 | */ | |
293 | if (request_irq(adev->host_irq, kvm_assigned_dev_intr, | |
294 | 0, "kvm_assigned_intx_device", (void *)adev)) | |
295 | return -EIO; | |
296 | } | |
297 | ||
4f906c19 SY |
298 | adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_INTX | |
299 | KVM_ASSIGNED_DEV_HOST_INTX; | |
00e3ed39 SY |
300 | return 0; |
301 | } | |
302 | ||
6b9cc7fd SY |
303 | #ifdef CONFIG_X86 |
304 | static int assigned_device_update_msi(struct kvm *kvm, | |
305 | struct kvm_assigned_dev_kernel *adev, | |
306 | struct kvm_assigned_irq *airq) | |
307 | { | |
308 | int r; | |
309 | ||
5319c662 SY |
310 | if (airq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI) { |
311 | /* x86 don't care upper address of guest msi message addr */ | |
312 | adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_MSI; | |
313 | adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_INTX; | |
314 | adev->guest_msi.address_lo = airq->guest_msi.addr_lo; | |
315 | adev->guest_msi.data = airq->guest_msi.data; | |
316 | adev->ack_notifier.gsi = -1; | |
317 | } else if (msi2intx) { | |
318 | adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_INTX; | |
319 | adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_MSI; | |
320 | adev->guest_irq = airq->guest_irq; | |
321 | adev->ack_notifier.gsi = airq->guest_irq; | |
322 | } | |
6b9cc7fd SY |
323 | |
324 | if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) | |
325 | return 0; | |
326 | ||
327 | if (irqchip_in_kernel(kvm)) { | |
5319c662 SY |
328 | if (!msi2intx) { |
329 | if (adev->irq_requested_type & | |
330 | KVM_ASSIGNED_DEV_HOST_INTX) | |
331 | free_irq(adev->host_irq, (void *)adev); | |
332 | ||
333 | r = pci_enable_msi(adev->dev); | |
334 | if (r) | |
335 | return r; | |
336 | } | |
6b9cc7fd SY |
337 | |
338 | adev->host_irq = adev->dev->irq; | |
339 | if (request_irq(adev->host_irq, kvm_assigned_dev_intr, 0, | |
340 | "kvm_assigned_msi_device", (void *)adev)) | |
341 | return -EIO; | |
342 | } | |
343 | ||
5319c662 SY |
344 | if (!msi2intx) |
345 | adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_MSI; | |
346 | ||
347 | adev->irq_requested_type |= KVM_ASSIGNED_DEV_HOST_MSI; | |
6b9cc7fd SY |
348 | return 0; |
349 | } | |
350 | #endif | |
351 | ||
8a98f664 XZ |
352 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, |
353 | struct kvm_assigned_irq | |
354 | *assigned_irq) | |
355 | { | |
356 | int r = 0; | |
357 | struct kvm_assigned_dev_kernel *match; | |
358 | ||
359 | mutex_lock(&kvm->lock); | |
360 | ||
361 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
362 | assigned_irq->assigned_dev_id); | |
363 | if (!match) { | |
364 | mutex_unlock(&kvm->lock); | |
365 | return -EINVAL; | |
366 | } | |
367 | ||
4f906c19 | 368 | if (!match->irq_requested_type) { |
342ffb93 SY |
369 | INIT_WORK(&match->interrupt_work, |
370 | kvm_assigned_dev_interrupt_work_handler); | |
371 | if (irqchip_in_kernel(kvm)) { | |
372 | /* Register ack nofitier */ | |
373 | match->ack_notifier.gsi = -1; | |
374 | match->ack_notifier.irq_acked = | |
375 | kvm_assigned_dev_ack_irq; | |
376 | kvm_register_irq_ack_notifier(kvm, | |
377 | &match->ack_notifier); | |
378 | ||
379 | /* Request IRQ source ID */ | |
380 | r = kvm_request_irq_source_id(kvm); | |
381 | if (r < 0) | |
382 | goto out_release; | |
383 | else | |
384 | match->irq_source_id = r; | |
5319c662 SY |
385 | |
386 | #ifdef CONFIG_X86 | |
387 | /* Determine host device irq type, we can know the | |
388 | * result from dev->msi_enabled */ | |
389 | if (msi2intx) | |
390 | pci_enable_msi(match->dev); | |
391 | #endif | |
342ffb93 | 392 | } |
8a98f664 XZ |
393 | } |
394 | ||
5319c662 SY |
395 | if ((!msi2intx && |
396 | (assigned_irq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI)) || | |
397 | (msi2intx && match->dev->msi_enabled)) { | |
6b9cc7fd SY |
398 | #ifdef CONFIG_X86 |
399 | r = assigned_device_update_msi(kvm, match, assigned_irq); | |
400 | if (r) { | |
401 | printk(KERN_WARNING "kvm: failed to enable " | |
402 | "MSI device!\n"); | |
403 | goto out_release; | |
404 | } | |
405 | #else | |
406 | r = -ENOTTY; | |
407 | #endif | |
408 | } else if (assigned_irq->host_irq == 0 && match->dev->irq == 0) { | |
409 | /* Host device IRQ 0 means don't support INTx */ | |
5319c662 SY |
410 | if (!msi2intx) { |
411 | printk(KERN_WARNING | |
412 | "kvm: wait device to enable MSI!\n"); | |
413 | r = 0; | |
414 | } else { | |
415 | printk(KERN_WARNING | |
416 | "kvm: failed to enable MSI device!\n"); | |
417 | r = -ENOTTY; | |
418 | goto out_release; | |
419 | } | |
6b9cc7fd SY |
420 | } else { |
421 | /* Non-sharing INTx mode */ | |
422 | r = assigned_device_update_intx(kvm, match, assigned_irq); | |
423 | if (r) { | |
424 | printk(KERN_WARNING "kvm: failed to enable " | |
425 | "INTx device!\n"); | |
426 | goto out_release; | |
427 | } | |
428 | } | |
8a98f664 | 429 | |
8a98f664 XZ |
430 | mutex_unlock(&kvm->lock); |
431 | return r; | |
432 | out_release: | |
433 | mutex_unlock(&kvm->lock); | |
434 | kvm_free_assigned_device(kvm, match); | |
435 | return r; | |
436 | } | |
437 | ||
438 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, | |
439 | struct kvm_assigned_pci_dev *assigned_dev) | |
440 | { | |
441 | int r = 0; | |
442 | struct kvm_assigned_dev_kernel *match; | |
443 | struct pci_dev *dev; | |
444 | ||
445 | mutex_lock(&kvm->lock); | |
446 | ||
447 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
448 | assigned_dev->assigned_dev_id); | |
449 | if (match) { | |
450 | /* device already assigned */ | |
451 | r = -EINVAL; | |
452 | goto out; | |
453 | } | |
454 | ||
455 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); | |
456 | if (match == NULL) { | |
457 | printk(KERN_INFO "%s: Couldn't allocate memory\n", | |
458 | __func__); | |
459 | r = -ENOMEM; | |
460 | goto out; | |
461 | } | |
462 | dev = pci_get_bus_and_slot(assigned_dev->busnr, | |
463 | assigned_dev->devfn); | |
464 | if (!dev) { | |
465 | printk(KERN_INFO "%s: host device not found\n", __func__); | |
466 | r = -EINVAL; | |
467 | goto out_free; | |
468 | } | |
469 | if (pci_enable_device(dev)) { | |
470 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); | |
471 | r = -EBUSY; | |
472 | goto out_put; | |
473 | } | |
474 | r = pci_request_regions(dev, "kvm_assigned_device"); | |
475 | if (r) { | |
476 | printk(KERN_INFO "%s: Could not get access to device regions\n", | |
477 | __func__); | |
478 | goto out_disable; | |
479 | } | |
6eb55818 SY |
480 | |
481 | pci_reset_function(dev); | |
482 | ||
8a98f664 XZ |
483 | match->assigned_dev_id = assigned_dev->assigned_dev_id; |
484 | match->host_busnr = assigned_dev->busnr; | |
485 | match->host_devfn = assigned_dev->devfn; | |
486 | match->dev = dev; | |
f29b2673 | 487 | match->irq_source_id = -1; |
8a98f664 XZ |
488 | match->kvm = kvm; |
489 | ||
490 | list_add(&match->list, &kvm->arch.assigned_dev_head); | |
491 | ||
492 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { | |
493 | r = kvm_iommu_map_guest(kvm, match); | |
494 | if (r) | |
495 | goto out_list_del; | |
496 | } | |
497 | ||
498 | out: | |
499 | mutex_unlock(&kvm->lock); | |
500 | return r; | |
501 | out_list_del: | |
502 | list_del(&match->list); | |
503 | pci_release_regions(dev); | |
504 | out_disable: | |
505 | pci_disable_device(dev); | |
506 | out_put: | |
507 | pci_dev_put(dev); | |
508 | out_free: | |
509 | kfree(match); | |
510 | mutex_unlock(&kvm->lock); | |
511 | return r; | |
512 | } | |
513 | #endif | |
514 | ||
5aacf0ca JM |
515 | static inline int valid_vcpu(int n) |
516 | { | |
517 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
518 | } | |
519 | ||
c77fb9dc | 520 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
cbff90a7 BAY |
521 | { |
522 | if (pfn_valid(pfn)) | |
523 | return PageReserved(pfn_to_page(pfn)); | |
524 | ||
525 | return true; | |
526 | } | |
527 | ||
bccf2150 AK |
528 | /* |
529 | * Switches to specified vcpu, until a matching vcpu_put() | |
530 | */ | |
313a3dc7 | 531 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 532 | { |
15ad7146 AK |
533 | int cpu; |
534 | ||
bccf2150 | 535 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
536 | cpu = get_cpu(); |
537 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 538 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 539 | put_cpu(); |
6aa8b732 AK |
540 | } |
541 | ||
313a3dc7 | 542 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 543 | { |
15ad7146 | 544 | preempt_disable(); |
313a3dc7 | 545 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
546 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
547 | preempt_enable(); | |
6aa8b732 AK |
548 | mutex_unlock(&vcpu->mutex); |
549 | } | |
550 | ||
d9e368d6 AK |
551 | static void ack_flush(void *_completed) |
552 | { | |
d9e368d6 AK |
553 | } |
554 | ||
555 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
556 | { | |
597a5f55 | 557 | int i, cpu, me; |
d9e368d6 AK |
558 | cpumask_t cpus; |
559 | struct kvm_vcpu *vcpu; | |
d9e368d6 | 560 | |
597a5f55 | 561 | me = get_cpu(); |
d9e368d6 | 562 | cpus_clear(cpus); |
fb3f0f51 RR |
563 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
564 | vcpu = kvm->vcpus[i]; | |
565 | if (!vcpu) | |
566 | continue; | |
3176bc3e | 567 | if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
d9e368d6 AK |
568 | continue; |
569 | cpu = vcpu->cpu; | |
597a5f55 | 570 | if (cpu != -1 && cpu != me) |
49d3bd7e | 571 | cpu_set(cpu, cpus); |
d9e368d6 | 572 | } |
0f74a24c | 573 | if (cpus_empty(cpus)) |
597a5f55 | 574 | goto out; |
0f74a24c | 575 | ++kvm->stat.remote_tlb_flush; |
49d3bd7e | 576 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
597a5f55 AK |
577 | out: |
578 | put_cpu(); | |
d9e368d6 AK |
579 | } |
580 | ||
2e53d63a MT |
581 | void kvm_reload_remote_mmus(struct kvm *kvm) |
582 | { | |
597a5f55 | 583 | int i, cpu, me; |
2e53d63a MT |
584 | cpumask_t cpus; |
585 | struct kvm_vcpu *vcpu; | |
586 | ||
597a5f55 | 587 | me = get_cpu(); |
2e53d63a MT |
588 | cpus_clear(cpus); |
589 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
590 | vcpu = kvm->vcpus[i]; | |
591 | if (!vcpu) | |
592 | continue; | |
593 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
594 | continue; | |
595 | cpu = vcpu->cpu; | |
597a5f55 | 596 | if (cpu != -1 && cpu != me) |
2e53d63a MT |
597 | cpu_set(cpu, cpus); |
598 | } | |
599 | if (cpus_empty(cpus)) | |
597a5f55 | 600 | goto out; |
2e53d63a | 601 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
597a5f55 AK |
602 | out: |
603 | put_cpu(); | |
2e53d63a MT |
604 | } |
605 | ||
606 | ||
fb3f0f51 RR |
607 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
608 | { | |
609 | struct page *page; | |
610 | int r; | |
611 | ||
612 | mutex_init(&vcpu->mutex); | |
613 | vcpu->cpu = -1; | |
fb3f0f51 RR |
614 | vcpu->kvm = kvm; |
615 | vcpu->vcpu_id = id; | |
b6958ce4 | 616 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
617 | |
618 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
619 | if (!page) { | |
620 | r = -ENOMEM; | |
621 | goto fail; | |
622 | } | |
623 | vcpu->run = page_address(page); | |
624 | ||
e9b11c17 | 625 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 626 | if (r < 0) |
e9b11c17 | 627 | goto fail_free_run; |
fb3f0f51 RR |
628 | return 0; |
629 | ||
fb3f0f51 RR |
630 | fail_free_run: |
631 | free_page((unsigned long)vcpu->run); | |
632 | fail: | |
76fafa5e | 633 | return r; |
fb3f0f51 RR |
634 | } |
635 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
636 | ||
637 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
638 | { | |
e9b11c17 | 639 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
640 | free_page((unsigned long)vcpu->run); |
641 | } | |
642 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
643 | ||
e930bffe AA |
644 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
645 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
646 | { | |
647 | return container_of(mn, struct kvm, mmu_notifier); | |
648 | } | |
649 | ||
650 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
651 | struct mm_struct *mm, | |
652 | unsigned long address) | |
653 | { | |
654 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
655 | int need_tlb_flush; | |
656 | ||
657 | /* | |
658 | * When ->invalidate_page runs, the linux pte has been zapped | |
659 | * already but the page is still allocated until | |
660 | * ->invalidate_page returns. So if we increase the sequence | |
661 | * here the kvm page fault will notice if the spte can't be | |
662 | * established because the page is going to be freed. If | |
663 | * instead the kvm page fault establishes the spte before | |
664 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
665 | * before returning. | |
666 | * | |
667 | * The sequence increase only need to be seen at spin_unlock | |
668 | * time, and not at spin_lock time. | |
669 | * | |
670 | * Increasing the sequence after the spin_unlock would be | |
671 | * unsafe because the kvm page fault could then establish the | |
672 | * pte after kvm_unmap_hva returned, without noticing the page | |
673 | * is going to be freed. | |
674 | */ | |
675 | spin_lock(&kvm->mmu_lock); | |
676 | kvm->mmu_notifier_seq++; | |
677 | need_tlb_flush = kvm_unmap_hva(kvm, address); | |
678 | spin_unlock(&kvm->mmu_lock); | |
679 | ||
680 | /* we've to flush the tlb before the pages can be freed */ | |
681 | if (need_tlb_flush) | |
682 | kvm_flush_remote_tlbs(kvm); | |
683 | ||
684 | } | |
685 | ||
686 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, | |
687 | struct mm_struct *mm, | |
688 | unsigned long start, | |
689 | unsigned long end) | |
690 | { | |
691 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
692 | int need_tlb_flush = 0; | |
693 | ||
694 | spin_lock(&kvm->mmu_lock); | |
695 | /* | |
696 | * The count increase must become visible at unlock time as no | |
697 | * spte can be established without taking the mmu_lock and | |
698 | * count is also read inside the mmu_lock critical section. | |
699 | */ | |
700 | kvm->mmu_notifier_count++; | |
701 | for (; start < end; start += PAGE_SIZE) | |
702 | need_tlb_flush |= kvm_unmap_hva(kvm, start); | |
703 | spin_unlock(&kvm->mmu_lock); | |
704 | ||
705 | /* we've to flush the tlb before the pages can be freed */ | |
706 | if (need_tlb_flush) | |
707 | kvm_flush_remote_tlbs(kvm); | |
708 | } | |
709 | ||
710 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
711 | struct mm_struct *mm, | |
712 | unsigned long start, | |
713 | unsigned long end) | |
714 | { | |
715 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
716 | ||
717 | spin_lock(&kvm->mmu_lock); | |
718 | /* | |
719 | * This sequence increase will notify the kvm page fault that | |
720 | * the page that is going to be mapped in the spte could have | |
721 | * been freed. | |
722 | */ | |
723 | kvm->mmu_notifier_seq++; | |
724 | /* | |
725 | * The above sequence increase must be visible before the | |
726 | * below count decrease but both values are read by the kvm | |
727 | * page fault under mmu_lock spinlock so we don't need to add | |
728 | * a smb_wmb() here in between the two. | |
729 | */ | |
730 | kvm->mmu_notifier_count--; | |
731 | spin_unlock(&kvm->mmu_lock); | |
732 | ||
733 | BUG_ON(kvm->mmu_notifier_count < 0); | |
734 | } | |
735 | ||
736 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
737 | struct mm_struct *mm, | |
738 | unsigned long address) | |
739 | { | |
740 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
741 | int young; | |
742 | ||
743 | spin_lock(&kvm->mmu_lock); | |
744 | young = kvm_age_hva(kvm, address); | |
745 | spin_unlock(&kvm->mmu_lock); | |
746 | ||
747 | if (young) | |
748 | kvm_flush_remote_tlbs(kvm); | |
749 | ||
750 | return young; | |
751 | } | |
752 | ||
753 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { | |
754 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
755 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
756 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
757 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
758 | }; | |
759 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ | |
760 | ||
f17abe9a | 761 | static struct kvm *kvm_create_vm(void) |
6aa8b732 | 762 | { |
d19a9cd2 | 763 | struct kvm *kvm = kvm_arch_create_vm(); |
5f94c174 LV |
764 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
765 | struct page *page; | |
766 | #endif | |
6aa8b732 | 767 | |
d19a9cd2 ZX |
768 | if (IS_ERR(kvm)) |
769 | goto out; | |
6aa8b732 | 770 | |
5f94c174 LV |
771 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
772 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
773 | if (!page) { | |
774 | kfree(kvm); | |
775 | return ERR_PTR(-ENOMEM); | |
776 | } | |
777 | kvm->coalesced_mmio_ring = | |
778 | (struct kvm_coalesced_mmio_ring *)page_address(page); | |
779 | #endif | |
780 | ||
e930bffe AA |
781 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
782 | { | |
783 | int err; | |
784 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
785 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
786 | if (err) { | |
787 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
788 | put_page(page); | |
789 | #endif | |
790 | kfree(kvm); | |
791 | return ERR_PTR(err); | |
792 | } | |
793 | } | |
794 | #endif | |
795 | ||
6d4e4c4f AK |
796 | kvm->mm = current->mm; |
797 | atomic_inc(&kvm->mm->mm_count); | |
aaee2c94 | 798 | spin_lock_init(&kvm->mmu_lock); |
74906345 | 799 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 800 | mutex_init(&kvm->lock); |
2eeb2e94 | 801 | kvm_io_bus_init(&kvm->mmio_bus); |
72dc67a6 | 802 | init_rwsem(&kvm->slots_lock); |
d39f13b0 | 803 | atomic_set(&kvm->users_count, 1); |
5e58cfe4 RR |
804 | spin_lock(&kvm_lock); |
805 | list_add(&kvm->vm_list, &vm_list); | |
806 | spin_unlock(&kvm_lock); | |
5f94c174 LV |
807 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
808 | kvm_coalesced_mmio_init(kvm); | |
809 | #endif | |
d19a9cd2 | 810 | out: |
f17abe9a AK |
811 | return kvm; |
812 | } | |
813 | ||
6aa8b732 AK |
814 | /* |
815 | * Free any memory in @free but not in @dont. | |
816 | */ | |
817 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
818 | struct kvm_memory_slot *dont) | |
819 | { | |
290fc38d IE |
820 | if (!dont || free->rmap != dont->rmap) |
821 | vfree(free->rmap); | |
6aa8b732 AK |
822 | |
823 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
824 | vfree(free->dirty_bitmap); | |
825 | ||
05da4558 MT |
826 | if (!dont || free->lpage_info != dont->lpage_info) |
827 | vfree(free->lpage_info); | |
828 | ||
6aa8b732 | 829 | free->npages = 0; |
8b6d44c7 | 830 | free->dirty_bitmap = NULL; |
8d4e1288 | 831 | free->rmap = NULL; |
05da4558 | 832 | free->lpage_info = NULL; |
6aa8b732 AK |
833 | } |
834 | ||
d19a9cd2 | 835 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 AK |
836 | { |
837 | int i; | |
838 | ||
839 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 840 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
841 | } |
842 | ||
f17abe9a AK |
843 | static void kvm_destroy_vm(struct kvm *kvm) |
844 | { | |
6d4e4c4f AK |
845 | struct mm_struct *mm = kvm->mm; |
846 | ||
133de902 AK |
847 | spin_lock(&kvm_lock); |
848 | list_del(&kvm->vm_list); | |
849 | spin_unlock(&kvm_lock); | |
74906345 | 850 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 851 | kvm_io_bus_destroy(&kvm->mmio_bus); |
5f94c174 LV |
852 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
853 | if (kvm->coalesced_mmio_ring != NULL) | |
854 | free_page((unsigned long)kvm->coalesced_mmio_ring); | |
e930bffe AA |
855 | #endif |
856 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) | |
857 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
5f94c174 | 858 | #endif |
d19a9cd2 | 859 | kvm_arch_destroy_vm(kvm); |
6d4e4c4f | 860 | mmdrop(mm); |
f17abe9a AK |
861 | } |
862 | ||
d39f13b0 IE |
863 | void kvm_get_kvm(struct kvm *kvm) |
864 | { | |
865 | atomic_inc(&kvm->users_count); | |
866 | } | |
867 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
868 | ||
869 | void kvm_put_kvm(struct kvm *kvm) | |
870 | { | |
871 | if (atomic_dec_and_test(&kvm->users_count)) | |
872 | kvm_destroy_vm(kvm); | |
873 | } | |
874 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
875 | ||
876 | ||
f17abe9a AK |
877 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
878 | { | |
879 | struct kvm *kvm = filp->private_data; | |
880 | ||
d39f13b0 | 881 | kvm_put_kvm(kvm); |
6aa8b732 AK |
882 | return 0; |
883 | } | |
884 | ||
6aa8b732 AK |
885 | /* |
886 | * Allocate some memory and give it an address in the guest physical address | |
887 | * space. | |
888 | * | |
889 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 890 | * |
10589a46 | 891 | * Must be called holding mmap_sem for write. |
6aa8b732 | 892 | */ |
f78e0e2e SY |
893 | int __kvm_set_memory_region(struct kvm *kvm, |
894 | struct kvm_userspace_memory_region *mem, | |
895 | int user_alloc) | |
6aa8b732 AK |
896 | { |
897 | int r; | |
898 | gfn_t base_gfn; | |
899 | unsigned long npages; | |
900 | unsigned long i; | |
901 | struct kvm_memory_slot *memslot; | |
902 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
903 | |
904 | r = -EINVAL; | |
905 | /* General sanity checks */ | |
906 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
907 | goto out; | |
908 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
909 | goto out; | |
e7cacd40 | 910 | if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) |
78749809 | 911 | goto out; |
e0d62c7f | 912 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
913 | goto out; |
914 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
915 | goto out; | |
916 | ||
917 | memslot = &kvm->memslots[mem->slot]; | |
918 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
919 | npages = mem->memory_size >> PAGE_SHIFT; | |
920 | ||
921 | if (!npages) | |
922 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
923 | ||
6aa8b732 AK |
924 | new = old = *memslot; |
925 | ||
926 | new.base_gfn = base_gfn; | |
927 | new.npages = npages; | |
928 | new.flags = mem->flags; | |
929 | ||
930 | /* Disallow changing a memory slot's size. */ | |
931 | r = -EINVAL; | |
932 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 933 | goto out_free; |
6aa8b732 AK |
934 | |
935 | /* Check for overlaps */ | |
936 | r = -EEXIST; | |
937 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
938 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
939 | ||
940 | if (s == memslot) | |
941 | continue; | |
942 | if (!((base_gfn + npages <= s->base_gfn) || | |
943 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 944 | goto out_free; |
6aa8b732 | 945 | } |
6aa8b732 | 946 | |
6aa8b732 AK |
947 | /* Free page dirty bitmap if unneeded */ |
948 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 949 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
950 | |
951 | r = -ENOMEM; | |
952 | ||
953 | /* Allocate if a slot is being created */ | |
eff0114a | 954 | #ifndef CONFIG_S390 |
8d4e1288 | 955 | if (npages && !new.rmap) { |
d77c26fc | 956 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
957 | |
958 | if (!new.rmap) | |
f78e0e2e | 959 | goto out_free; |
290fc38d | 960 | |
290fc38d | 961 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 962 | |
80b14b5b | 963 | new.user_alloc = user_alloc; |
604b38ac AA |
964 | /* |
965 | * hva_to_rmmap() serialzies with the mmu_lock and to be | |
966 | * safe it has to ignore memslots with !user_alloc && | |
967 | * !userspace_addr. | |
968 | */ | |
969 | if (user_alloc) | |
970 | new.userspace_addr = mem->userspace_addr; | |
971 | else | |
972 | new.userspace_addr = 0; | |
6aa8b732 | 973 | } |
05da4558 MT |
974 | if (npages && !new.lpage_info) { |
975 | int largepages = npages / KVM_PAGES_PER_HPAGE; | |
976 | if (npages % KVM_PAGES_PER_HPAGE) | |
977 | largepages++; | |
978 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
979 | largepages++; | |
980 | ||
981 | new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info)); | |
982 | ||
983 | if (!new.lpage_info) | |
984 | goto out_free; | |
985 | ||
986 | memset(new.lpage_info, 0, largepages * sizeof(*new.lpage_info)); | |
987 | ||
988 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
989 | new.lpage_info[0].write_count = 1; | |
990 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE) | |
991 | new.lpage_info[largepages-1].write_count = 1; | |
992 | } | |
6aa8b732 AK |
993 | |
994 | /* Allocate page dirty bitmap if needed */ | |
995 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
996 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
997 | ||
998 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
999 | if (!new.dirty_bitmap) | |
f78e0e2e | 1000 | goto out_free; |
6aa8b732 AK |
1001 | memset(new.dirty_bitmap, 0, dirty_bytes); |
1002 | } | |
eff0114a | 1003 | #endif /* not defined CONFIG_S390 */ |
6aa8b732 | 1004 | |
34d4cb8f MT |
1005 | if (!npages) |
1006 | kvm_arch_flush_shadow(kvm); | |
1007 | ||
604b38ac AA |
1008 | spin_lock(&kvm->mmu_lock); |
1009 | if (mem->slot >= kvm->nmemslots) | |
1010 | kvm->nmemslots = mem->slot + 1; | |
1011 | ||
3ad82a7e | 1012 | *memslot = new; |
604b38ac | 1013 | spin_unlock(&kvm->mmu_lock); |
3ad82a7e | 1014 | |
0de10343 ZX |
1015 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
1016 | if (r) { | |
604b38ac | 1017 | spin_lock(&kvm->mmu_lock); |
0de10343 | 1018 | *memslot = old; |
604b38ac | 1019 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 1020 | goto out_free; |
82ce2c96 IE |
1021 | } |
1022 | ||
6f897248 GC |
1023 | kvm_free_physmem_slot(&old, npages ? &new : NULL); |
1024 | /* Slot deletion case: we have to update the current slot */ | |
1025 | if (!npages) | |
1026 | *memslot = old; | |
8a98f664 | 1027 | #ifdef CONFIG_DMAR |
62c476c7 BAY |
1028 | /* map the pages in iommu page table */ |
1029 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); | |
1030 | if (r) | |
1031 | goto out; | |
8a98f664 | 1032 | #endif |
6aa8b732 AK |
1033 | return 0; |
1034 | ||
f78e0e2e | 1035 | out_free: |
6aa8b732 AK |
1036 | kvm_free_physmem_slot(&new, &old); |
1037 | out: | |
1038 | return r; | |
210c7c4d IE |
1039 | |
1040 | } | |
f78e0e2e SY |
1041 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
1042 | ||
1043 | int kvm_set_memory_region(struct kvm *kvm, | |
1044 | struct kvm_userspace_memory_region *mem, | |
1045 | int user_alloc) | |
1046 | { | |
1047 | int r; | |
1048 | ||
72dc67a6 | 1049 | down_write(&kvm->slots_lock); |
f78e0e2e | 1050 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
72dc67a6 | 1051 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1052 | return r; |
1053 | } | |
210c7c4d IE |
1054 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
1055 | ||
1fe779f8 CO |
1056 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
1057 | struct | |
1058 | kvm_userspace_memory_region *mem, | |
1059 | int user_alloc) | |
210c7c4d | 1060 | { |
e0d62c7f IE |
1061 | if (mem->slot >= KVM_MEMORY_SLOTS) |
1062 | return -EINVAL; | |
210c7c4d | 1063 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
1064 | } |
1065 | ||
5bb064dc ZX |
1066 | int kvm_get_dirty_log(struct kvm *kvm, |
1067 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
1068 | { |
1069 | struct kvm_memory_slot *memslot; | |
1070 | int r, i; | |
1071 | int n; | |
1072 | unsigned long any = 0; | |
1073 | ||
6aa8b732 AK |
1074 | r = -EINVAL; |
1075 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1076 | goto out; | |
1077 | ||
1078 | memslot = &kvm->memslots[log->slot]; | |
1079 | r = -ENOENT; | |
1080 | if (!memslot->dirty_bitmap) | |
1081 | goto out; | |
1082 | ||
cd1a4a98 | 1083 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 1084 | |
cd1a4a98 | 1085 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
1086 | any = memslot->dirty_bitmap[i]; |
1087 | ||
1088 | r = -EFAULT; | |
1089 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1090 | goto out; | |
1091 | ||
5bb064dc ZX |
1092 | if (any) |
1093 | *is_dirty = 1; | |
6aa8b732 AK |
1094 | |
1095 | r = 0; | |
6aa8b732 | 1096 | out: |
6aa8b732 AK |
1097 | return r; |
1098 | } | |
1099 | ||
cea7bb21 IE |
1100 | int is_error_page(struct page *page) |
1101 | { | |
1102 | return page == bad_page; | |
1103 | } | |
1104 | EXPORT_SYMBOL_GPL(is_error_page); | |
1105 | ||
35149e21 AL |
1106 | int is_error_pfn(pfn_t pfn) |
1107 | { | |
1108 | return pfn == bad_pfn; | |
1109 | } | |
1110 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
1111 | ||
f9d46eb0 IE |
1112 | static inline unsigned long bad_hva(void) |
1113 | { | |
1114 | return PAGE_OFFSET; | |
1115 | } | |
1116 | ||
1117 | int kvm_is_error_hva(unsigned long addr) | |
1118 | { | |
1119 | return addr == bad_hva(); | |
1120 | } | |
1121 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
1122 | ||
2843099f | 1123 | struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) |
6aa8b732 AK |
1124 | { |
1125 | int i; | |
1126 | ||
1127 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1128 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1129 | ||
1130 | if (gfn >= memslot->base_gfn | |
1131 | && gfn < memslot->base_gfn + memslot->npages) | |
1132 | return memslot; | |
1133 | } | |
8b6d44c7 | 1134 | return NULL; |
6aa8b732 | 1135 | } |
2843099f | 1136 | EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); |
e8207547 AK |
1137 | |
1138 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1139 | { | |
1140 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1141 | return gfn_to_memslot_unaliased(kvm, gfn); |
e8207547 | 1142 | } |
6aa8b732 | 1143 | |
e0d62c7f IE |
1144 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
1145 | { | |
1146 | int i; | |
1147 | ||
1148 | gfn = unalias_gfn(kvm, gfn); | |
1149 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1150 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1151 | ||
1152 | if (gfn >= memslot->base_gfn | |
1153 | && gfn < memslot->base_gfn + memslot->npages) | |
1154 | return 1; | |
1155 | } | |
1156 | return 0; | |
1157 | } | |
1158 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
1159 | ||
05da4558 | 1160 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
539cb660 IE |
1161 | { |
1162 | struct kvm_memory_slot *slot; | |
1163 | ||
1164 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1165 | slot = gfn_to_memslot_unaliased(kvm, gfn); |
539cb660 IE |
1166 | if (!slot) |
1167 | return bad_hva(); | |
1168 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
1169 | } | |
0d150298 | 1170 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 1171 | |
35149e21 | 1172 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
954bbbc2 | 1173 | { |
8d4e1288 | 1174 | struct page *page[1]; |
539cb660 | 1175 | unsigned long addr; |
8d4e1288 | 1176 | int npages; |
2e2e3738 | 1177 | pfn_t pfn; |
954bbbc2 | 1178 | |
60395224 AK |
1179 | might_sleep(); |
1180 | ||
539cb660 IE |
1181 | addr = gfn_to_hva(kvm, gfn); |
1182 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 1183 | get_page(bad_page); |
35149e21 | 1184 | return page_to_pfn(bad_page); |
8a7ae055 | 1185 | } |
8d4e1288 | 1186 | |
4c2155ce | 1187 | npages = get_user_pages_fast(addr, 1, 1, page); |
539cb660 | 1188 | |
2e2e3738 AL |
1189 | if (unlikely(npages != 1)) { |
1190 | struct vm_area_struct *vma; | |
1191 | ||
4c2155ce | 1192 | down_read(¤t->mm->mmap_sem); |
2e2e3738 | 1193 | vma = find_vma(current->mm, addr); |
4c2155ce | 1194 | |
2e2e3738 AL |
1195 | if (vma == NULL || addr < vma->vm_start || |
1196 | !(vma->vm_flags & VM_PFNMAP)) { | |
4c2155ce | 1197 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
1198 | get_page(bad_page); |
1199 | return page_to_pfn(bad_page); | |
1200 | } | |
1201 | ||
1202 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
4c2155ce | 1203 | up_read(¤t->mm->mmap_sem); |
c77fb9dc | 1204 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1205 | } else |
1206 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1207 | |
2e2e3738 | 1208 | return pfn; |
35149e21 AL |
1209 | } |
1210 | ||
1211 | EXPORT_SYMBOL_GPL(gfn_to_pfn); | |
1212 | ||
1213 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
1214 | { | |
2e2e3738 AL |
1215 | pfn_t pfn; |
1216 | ||
1217 | pfn = gfn_to_pfn(kvm, gfn); | |
c77fb9dc | 1218 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 AL |
1219 | return pfn_to_page(pfn); |
1220 | ||
c77fb9dc | 1221 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1222 | |
1223 | get_page(bad_page); | |
1224 | return bad_page; | |
954bbbc2 | 1225 | } |
aab61cc0 | 1226 | |
954bbbc2 AK |
1227 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1228 | ||
b4231d61 IE |
1229 | void kvm_release_page_clean(struct page *page) |
1230 | { | |
35149e21 | 1231 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1232 | } |
1233 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1234 | ||
35149e21 AL |
1235 | void kvm_release_pfn_clean(pfn_t pfn) |
1236 | { | |
c77fb9dc | 1237 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1238 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1239 | } |
1240 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1241 | ||
b4231d61 | 1242 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1243 | { |
35149e21 AL |
1244 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1245 | } | |
1246 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1247 | ||
1248 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1249 | { | |
1250 | kvm_set_pfn_dirty(pfn); | |
1251 | kvm_release_pfn_clean(pfn); | |
1252 | } | |
1253 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1254 | ||
1255 | void kvm_set_page_dirty(struct page *page) | |
1256 | { | |
1257 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1258 | } | |
1259 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1260 | ||
1261 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1262 | { | |
c77fb9dc | 1263 | if (!kvm_is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1264 | struct page *page = pfn_to_page(pfn); |
1265 | if (!PageReserved(page)) | |
1266 | SetPageDirty(page); | |
1267 | } | |
8a7ae055 | 1268 | } |
35149e21 AL |
1269 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1270 | ||
1271 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1272 | { | |
c77fb9dc | 1273 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1274 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1275 | } |
1276 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1277 | ||
1278 | void kvm_get_pfn(pfn_t pfn) | |
1279 | { | |
c77fb9dc | 1280 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1281 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1282 | } |
1283 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1284 | |
195aefde IE |
1285 | static int next_segment(unsigned long len, int offset) |
1286 | { | |
1287 | if (len > PAGE_SIZE - offset) | |
1288 | return PAGE_SIZE - offset; | |
1289 | else | |
1290 | return len; | |
1291 | } | |
1292 | ||
1293 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1294 | int len) | |
1295 | { | |
e0506bcb IE |
1296 | int r; |
1297 | unsigned long addr; | |
195aefde | 1298 | |
e0506bcb IE |
1299 | addr = gfn_to_hva(kvm, gfn); |
1300 | if (kvm_is_error_hva(addr)) | |
1301 | return -EFAULT; | |
1302 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
1303 | if (r) | |
195aefde | 1304 | return -EFAULT; |
195aefde IE |
1305 | return 0; |
1306 | } | |
1307 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1308 | ||
1309 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1310 | { | |
1311 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1312 | int seg; | |
1313 | int offset = offset_in_page(gpa); | |
1314 | int ret; | |
1315 | ||
1316 | while ((seg = next_segment(len, offset)) != 0) { | |
1317 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1318 | if (ret < 0) | |
1319 | return ret; | |
1320 | offset = 0; | |
1321 | len -= seg; | |
1322 | data += seg; | |
1323 | ++gfn; | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1328 | ||
7ec54588 MT |
1329 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1330 | unsigned long len) | |
1331 | { | |
1332 | int r; | |
1333 | unsigned long addr; | |
1334 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1335 | int offset = offset_in_page(gpa); | |
1336 | ||
1337 | addr = gfn_to_hva(kvm, gfn); | |
1338 | if (kvm_is_error_hva(addr)) | |
1339 | return -EFAULT; | |
0aac03f0 | 1340 | pagefault_disable(); |
7ec54588 | 1341 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1342 | pagefault_enable(); |
7ec54588 MT |
1343 | if (r) |
1344 | return -EFAULT; | |
1345 | return 0; | |
1346 | } | |
1347 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1348 | ||
195aefde IE |
1349 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1350 | int offset, int len) | |
1351 | { | |
e0506bcb IE |
1352 | int r; |
1353 | unsigned long addr; | |
195aefde | 1354 | |
e0506bcb IE |
1355 | addr = gfn_to_hva(kvm, gfn); |
1356 | if (kvm_is_error_hva(addr)) | |
1357 | return -EFAULT; | |
1358 | r = copy_to_user((void __user *)addr + offset, data, len); | |
1359 | if (r) | |
195aefde | 1360 | return -EFAULT; |
195aefde IE |
1361 | mark_page_dirty(kvm, gfn); |
1362 | return 0; | |
1363 | } | |
1364 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1365 | ||
1366 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1367 | unsigned long len) | |
1368 | { | |
1369 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1370 | int seg; | |
1371 | int offset = offset_in_page(gpa); | |
1372 | int ret; | |
1373 | ||
1374 | while ((seg = next_segment(len, offset)) != 0) { | |
1375 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1376 | if (ret < 0) | |
1377 | return ret; | |
1378 | offset = 0; | |
1379 | len -= seg; | |
1380 | data += seg; | |
1381 | ++gfn; | |
1382 | } | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1387 | { | |
3e021bf5 | 1388 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
195aefde IE |
1389 | } |
1390 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1391 | ||
1392 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1393 | { | |
1394 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1395 | int seg; | |
1396 | int offset = offset_in_page(gpa); | |
1397 | int ret; | |
1398 | ||
1399 | while ((seg = next_segment(len, offset)) != 0) { | |
1400 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1401 | if (ret < 0) | |
1402 | return ret; | |
1403 | offset = 0; | |
1404 | len -= seg; | |
1405 | ++gfn; | |
1406 | } | |
1407 | return 0; | |
1408 | } | |
1409 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1410 | ||
6aa8b732 AK |
1411 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1412 | { | |
31389947 | 1413 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1414 | |
3b6fff19 | 1415 | gfn = unalias_gfn(kvm, gfn); |
2843099f | 1416 | memslot = gfn_to_memslot_unaliased(kvm, gfn); |
7e9d619d RR |
1417 | if (memslot && memslot->dirty_bitmap) { |
1418 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1419 | |
7e9d619d RR |
1420 | /* avoid RMW */ |
1421 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1422 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1423 | } |
1424 | } | |
1425 | ||
b6958ce4 ED |
1426 | /* |
1427 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1428 | */ | |
8776e519 | 1429 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1430 | { |
e5c239cf MT |
1431 | DEFINE_WAIT(wait); |
1432 | ||
1433 | for (;;) { | |
1434 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1435 | ||
d7690175 MT |
1436 | if (kvm_cpu_has_interrupt(vcpu) || |
1437 | kvm_cpu_has_pending_timer(vcpu) || | |
1438 | kvm_arch_vcpu_runnable(vcpu)) { | |
1439 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
e5c239cf | 1440 | break; |
d7690175 | 1441 | } |
e5c239cf MT |
1442 | if (signal_pending(current)) |
1443 | break; | |
1444 | ||
b6958ce4 ED |
1445 | vcpu_put(vcpu); |
1446 | schedule(); | |
1447 | vcpu_load(vcpu); | |
1448 | } | |
d3bef15f | 1449 | |
e5c239cf | 1450 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1451 | } |
1452 | ||
6aa8b732 AK |
1453 | void kvm_resched(struct kvm_vcpu *vcpu) |
1454 | { | |
3fca0365 YD |
1455 | if (!need_resched()) |
1456 | return; | |
6aa8b732 | 1457 | cond_resched(); |
6aa8b732 AK |
1458 | } |
1459 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1460 | ||
e4a533a4 | 1461 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
9a2bb7f4 AK |
1462 | { |
1463 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
9a2bb7f4 AK |
1464 | struct page *page; |
1465 | ||
e4a533a4 | 1466 | if (vmf->pgoff == 0) |
039576c0 | 1467 | page = virt_to_page(vcpu->run); |
09566765 | 1468 | #ifdef CONFIG_X86 |
e4a533a4 | 1469 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
ad312c7c | 1470 | page = virt_to_page(vcpu->arch.pio_data); |
5f94c174 LV |
1471 | #endif |
1472 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1473 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) | |
1474 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); | |
09566765 | 1475 | #endif |
039576c0 | 1476 | else |
e4a533a4 | 1477 | return VM_FAULT_SIGBUS; |
9a2bb7f4 | 1478 | get_page(page); |
e4a533a4 | 1479 | vmf->page = page; |
1480 | return 0; | |
9a2bb7f4 AK |
1481 | } |
1482 | ||
1483 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
e4a533a4 | 1484 | .fault = kvm_vcpu_fault, |
9a2bb7f4 AK |
1485 | }; |
1486 | ||
1487 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
1488 | { | |
1489 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
1490 | return 0; | |
1491 | } | |
1492 | ||
bccf2150 AK |
1493 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1494 | { | |
1495 | struct kvm_vcpu *vcpu = filp->private_data; | |
1496 | ||
66c0b394 | 1497 | kvm_put_kvm(vcpu->kvm); |
bccf2150 AK |
1498 | return 0; |
1499 | } | |
1500 | ||
5c502742 | 1501 | static const struct file_operations kvm_vcpu_fops = { |
bccf2150 AK |
1502 | .release = kvm_vcpu_release, |
1503 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1504 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 1505 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
1506 | }; |
1507 | ||
1508 | /* | |
1509 | * Allocates an inode for the vcpu. | |
1510 | */ | |
1511 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1512 | { | |
7d9dbca3 | 1513 | int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
2030a42c | 1514 | if (fd < 0) |
66c0b394 | 1515 | kvm_put_kvm(vcpu->kvm); |
bccf2150 | 1516 | return fd; |
bccf2150 AK |
1517 | } |
1518 | ||
c5ea7660 AK |
1519 | /* |
1520 | * Creates some virtual cpus. Good luck creating more than one. | |
1521 | */ | |
1522 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
1523 | { | |
1524 | int r; | |
1525 | struct kvm_vcpu *vcpu; | |
1526 | ||
c5ea7660 | 1527 | if (!valid_vcpu(n)) |
fb3f0f51 | 1528 | return -EINVAL; |
c5ea7660 | 1529 | |
e9b11c17 | 1530 | vcpu = kvm_arch_vcpu_create(kvm, n); |
fb3f0f51 RR |
1531 | if (IS_ERR(vcpu)) |
1532 | return PTR_ERR(vcpu); | |
c5ea7660 | 1533 | |
15ad7146 AK |
1534 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1535 | ||
26e5215f AK |
1536 | r = kvm_arch_vcpu_setup(vcpu); |
1537 | if (r) | |
7d8fece6 | 1538 | return r; |
26e5215f | 1539 | |
11ec2804 | 1540 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
1541 | if (kvm->vcpus[n]) { |
1542 | r = -EEXIST; | |
e9b11c17 | 1543 | goto vcpu_destroy; |
fb3f0f51 RR |
1544 | } |
1545 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 1546 | mutex_unlock(&kvm->lock); |
c5ea7660 | 1547 | |
fb3f0f51 | 1548 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1549 | kvm_get_kvm(kvm); |
bccf2150 AK |
1550 | r = create_vcpu_fd(vcpu); |
1551 | if (r < 0) | |
fb3f0f51 RR |
1552 | goto unlink; |
1553 | return r; | |
39c3b86e | 1554 | |
fb3f0f51 | 1555 | unlink: |
11ec2804 | 1556 | mutex_lock(&kvm->lock); |
fb3f0f51 | 1557 | kvm->vcpus[n] = NULL; |
e9b11c17 | 1558 | vcpu_destroy: |
7d8fece6 | 1559 | mutex_unlock(&kvm->lock); |
d40ccc62 | 1560 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1561 | return r; |
1562 | } | |
1563 | ||
1961d276 AK |
1564 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1565 | { | |
1566 | if (sigset) { | |
1567 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1568 | vcpu->sigset_active = 1; | |
1569 | vcpu->sigset = *sigset; | |
1570 | } else | |
1571 | vcpu->sigset_active = 0; | |
1572 | return 0; | |
1573 | } | |
1574 | ||
bccf2150 AK |
1575 | static long kvm_vcpu_ioctl(struct file *filp, |
1576 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1577 | { |
bccf2150 | 1578 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1579 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1580 | int r; |
fa3795a7 DH |
1581 | struct kvm_fpu *fpu = NULL; |
1582 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1583 | |
6d4e4c4f AK |
1584 | if (vcpu->kvm->mm != current->mm) |
1585 | return -EIO; | |
6aa8b732 | 1586 | switch (ioctl) { |
9a2bb7f4 | 1587 | case KVM_RUN: |
f0fe5108 AK |
1588 | r = -EINVAL; |
1589 | if (arg) | |
1590 | goto out; | |
b6c7a5dc | 1591 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 1592 | break; |
6aa8b732 | 1593 | case KVM_GET_REGS: { |
3e4bb3ac | 1594 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1595 | |
3e4bb3ac XZ |
1596 | r = -ENOMEM; |
1597 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1598 | if (!kvm_regs) | |
6aa8b732 | 1599 | goto out; |
3e4bb3ac XZ |
1600 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1601 | if (r) | |
1602 | goto out_free1; | |
6aa8b732 | 1603 | r = -EFAULT; |
3e4bb3ac XZ |
1604 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1605 | goto out_free1; | |
6aa8b732 | 1606 | r = 0; |
3e4bb3ac XZ |
1607 | out_free1: |
1608 | kfree(kvm_regs); | |
6aa8b732 AK |
1609 | break; |
1610 | } | |
1611 | case KVM_SET_REGS: { | |
3e4bb3ac | 1612 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1613 | |
3e4bb3ac XZ |
1614 | r = -ENOMEM; |
1615 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1616 | if (!kvm_regs) | |
6aa8b732 | 1617 | goto out; |
3e4bb3ac XZ |
1618 | r = -EFAULT; |
1619 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) | |
1620 | goto out_free2; | |
1621 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); | |
6aa8b732 | 1622 | if (r) |
3e4bb3ac | 1623 | goto out_free2; |
6aa8b732 | 1624 | r = 0; |
3e4bb3ac XZ |
1625 | out_free2: |
1626 | kfree(kvm_regs); | |
6aa8b732 AK |
1627 | break; |
1628 | } | |
1629 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1630 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1631 | r = -ENOMEM; | |
1632 | if (!kvm_sregs) | |
1633 | goto out; | |
1634 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1635 | if (r) |
1636 | goto out; | |
1637 | r = -EFAULT; | |
fa3795a7 | 1638 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1639 | goto out; |
1640 | r = 0; | |
1641 | break; | |
1642 | } | |
1643 | case KVM_SET_SREGS: { | |
fa3795a7 DH |
1644 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1645 | r = -ENOMEM; | |
1646 | if (!kvm_sregs) | |
1647 | goto out; | |
6aa8b732 | 1648 | r = -EFAULT; |
fa3795a7 | 1649 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
6aa8b732 | 1650 | goto out; |
fa3795a7 | 1651 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1652 | if (r) |
1653 | goto out; | |
1654 | r = 0; | |
1655 | break; | |
1656 | } | |
62d9f0db MT |
1657 | case KVM_GET_MP_STATE: { |
1658 | struct kvm_mp_state mp_state; | |
1659 | ||
1660 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
1661 | if (r) | |
1662 | goto out; | |
1663 | r = -EFAULT; | |
1664 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
1665 | goto out; | |
1666 | r = 0; | |
1667 | break; | |
1668 | } | |
1669 | case KVM_SET_MP_STATE: { | |
1670 | struct kvm_mp_state mp_state; | |
1671 | ||
1672 | r = -EFAULT; | |
1673 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
1674 | goto out; | |
1675 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
1676 | if (r) | |
1677 | goto out; | |
1678 | r = 0; | |
1679 | break; | |
1680 | } | |
6aa8b732 AK |
1681 | case KVM_TRANSLATE: { |
1682 | struct kvm_translation tr; | |
1683 | ||
1684 | r = -EFAULT; | |
2f366987 | 1685 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 1686 | goto out; |
8b006791 | 1687 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
1688 | if (r) |
1689 | goto out; | |
1690 | r = -EFAULT; | |
2f366987 | 1691 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
1692 | goto out; |
1693 | r = 0; | |
1694 | break; | |
1695 | } | |
6aa8b732 AK |
1696 | case KVM_DEBUG_GUEST: { |
1697 | struct kvm_debug_guest dbg; | |
1698 | ||
1699 | r = -EFAULT; | |
2f366987 | 1700 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 1701 | goto out; |
b6c7a5dc | 1702 | r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
1703 | if (r) |
1704 | goto out; | |
1705 | r = 0; | |
1706 | break; | |
1707 | } | |
1961d276 AK |
1708 | case KVM_SET_SIGNAL_MASK: { |
1709 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
1710 | struct kvm_signal_mask kvm_sigmask; | |
1711 | sigset_t sigset, *p; | |
1712 | ||
1713 | p = NULL; | |
1714 | if (argp) { | |
1715 | r = -EFAULT; | |
1716 | if (copy_from_user(&kvm_sigmask, argp, | |
1717 | sizeof kvm_sigmask)) | |
1718 | goto out; | |
1719 | r = -EINVAL; | |
1720 | if (kvm_sigmask.len != sizeof sigset) | |
1721 | goto out; | |
1722 | r = -EFAULT; | |
1723 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
1724 | sizeof sigset)) | |
1725 | goto out; | |
1726 | p = &sigset; | |
1727 | } | |
1728 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
1729 | break; | |
1730 | } | |
b8836737 | 1731 | case KVM_GET_FPU: { |
fa3795a7 DH |
1732 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1733 | r = -ENOMEM; | |
1734 | if (!fpu) | |
1735 | goto out; | |
1736 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
1737 | if (r) |
1738 | goto out; | |
1739 | r = -EFAULT; | |
fa3795a7 | 1740 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
1741 | goto out; |
1742 | r = 0; | |
1743 | break; | |
1744 | } | |
1745 | case KVM_SET_FPU: { | |
fa3795a7 DH |
1746 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1747 | r = -ENOMEM; | |
1748 | if (!fpu) | |
1749 | goto out; | |
b8836737 | 1750 | r = -EFAULT; |
fa3795a7 | 1751 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
b8836737 | 1752 | goto out; |
fa3795a7 | 1753 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
1754 | if (r) |
1755 | goto out; | |
1756 | r = 0; | |
1757 | break; | |
1758 | } | |
bccf2150 | 1759 | default: |
313a3dc7 | 1760 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
1761 | } |
1762 | out: | |
fa3795a7 DH |
1763 | kfree(fpu); |
1764 | kfree(kvm_sregs); | |
bccf2150 AK |
1765 | return r; |
1766 | } | |
1767 | ||
1768 | static long kvm_vm_ioctl(struct file *filp, | |
1769 | unsigned int ioctl, unsigned long arg) | |
1770 | { | |
1771 | struct kvm *kvm = filp->private_data; | |
1772 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 1773 | int r; |
bccf2150 | 1774 | |
6d4e4c4f AK |
1775 | if (kvm->mm != current->mm) |
1776 | return -EIO; | |
bccf2150 AK |
1777 | switch (ioctl) { |
1778 | case KVM_CREATE_VCPU: | |
1779 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
1780 | if (r < 0) | |
1781 | goto out; | |
1782 | break; | |
6fc138d2 IE |
1783 | case KVM_SET_USER_MEMORY_REGION: { |
1784 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1785 | ||
1786 | r = -EFAULT; | |
1787 | if (copy_from_user(&kvm_userspace_mem, argp, | |
1788 | sizeof kvm_userspace_mem)) | |
1789 | goto out; | |
1790 | ||
1791 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
1792 | if (r) |
1793 | goto out; | |
1794 | break; | |
1795 | } | |
1796 | case KVM_GET_DIRTY_LOG: { | |
1797 | struct kvm_dirty_log log; | |
1798 | ||
1799 | r = -EFAULT; | |
2f366987 | 1800 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 1801 | goto out; |
2c6f5df9 | 1802 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
1803 | if (r) |
1804 | goto out; | |
1805 | break; | |
1806 | } | |
5f94c174 LV |
1807 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1808 | case KVM_REGISTER_COALESCED_MMIO: { | |
1809 | struct kvm_coalesced_mmio_zone zone; | |
1810 | r = -EFAULT; | |
1811 | if (copy_from_user(&zone, argp, sizeof zone)) | |
1812 | goto out; | |
1813 | r = -ENXIO; | |
1814 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); | |
1815 | if (r) | |
1816 | goto out; | |
1817 | r = 0; | |
1818 | break; | |
1819 | } | |
1820 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
1821 | struct kvm_coalesced_mmio_zone zone; | |
1822 | r = -EFAULT; | |
1823 | if (copy_from_user(&zone, argp, sizeof zone)) | |
1824 | goto out; | |
1825 | r = -ENXIO; | |
1826 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); | |
1827 | if (r) | |
1828 | goto out; | |
1829 | r = 0; | |
1830 | break; | |
1831 | } | |
8a98f664 XZ |
1832 | #endif |
1833 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT | |
1834 | case KVM_ASSIGN_PCI_DEVICE: { | |
1835 | struct kvm_assigned_pci_dev assigned_dev; | |
1836 | ||
1837 | r = -EFAULT; | |
1838 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
1839 | goto out; | |
1840 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); | |
1841 | if (r) | |
1842 | goto out; | |
1843 | break; | |
1844 | } | |
1845 | case KVM_ASSIGN_IRQ: { | |
1846 | struct kvm_assigned_irq assigned_irq; | |
1847 | ||
1848 | r = -EFAULT; | |
1849 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
1850 | goto out; | |
1851 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); | |
1852 | if (r) | |
1853 | goto out; | |
1854 | break; | |
1855 | } | |
5f94c174 | 1856 | #endif |
f17abe9a | 1857 | default: |
1fe779f8 | 1858 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
1859 | } |
1860 | out: | |
1861 | return r; | |
1862 | } | |
1863 | ||
e4a533a4 | 1864 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 1865 | { |
777b3f49 MT |
1866 | struct page *page[1]; |
1867 | unsigned long addr; | |
1868 | int npages; | |
1869 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 1870 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 1871 | |
777b3f49 MT |
1872 | addr = gfn_to_hva(kvm, gfn); |
1873 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 1874 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
1875 | |
1876 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
1877 | NULL); | |
1878 | if (unlikely(npages != 1)) | |
e4a533a4 | 1879 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
1880 | |
1881 | vmf->page = page[0]; | |
e4a533a4 | 1882 | return 0; |
f17abe9a AK |
1883 | } |
1884 | ||
1885 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
e4a533a4 | 1886 | .fault = kvm_vm_fault, |
f17abe9a AK |
1887 | }; |
1888 | ||
1889 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
1890 | { | |
1891 | vma->vm_ops = &kvm_vm_vm_ops; | |
1892 | return 0; | |
1893 | } | |
1894 | ||
5c502742 | 1895 | static const struct file_operations kvm_vm_fops = { |
f17abe9a AK |
1896 | .release = kvm_vm_release, |
1897 | .unlocked_ioctl = kvm_vm_ioctl, | |
1898 | .compat_ioctl = kvm_vm_ioctl, | |
1899 | .mmap = kvm_vm_mmap, | |
1900 | }; | |
1901 | ||
1902 | static int kvm_dev_ioctl_create_vm(void) | |
1903 | { | |
2030a42c | 1904 | int fd; |
f17abe9a AK |
1905 | struct kvm *kvm; |
1906 | ||
f17abe9a | 1907 | kvm = kvm_create_vm(); |
d6d28168 AK |
1908 | if (IS_ERR(kvm)) |
1909 | return PTR_ERR(kvm); | |
7d9dbca3 | 1910 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
2030a42c | 1911 | if (fd < 0) |
66c0b394 | 1912 | kvm_put_kvm(kvm); |
f17abe9a | 1913 | |
f17abe9a | 1914 | return fd; |
f17abe9a AK |
1915 | } |
1916 | ||
1917 | static long kvm_dev_ioctl(struct file *filp, | |
1918 | unsigned int ioctl, unsigned long arg) | |
1919 | { | |
07c45a36 | 1920 | long r = -EINVAL; |
f17abe9a AK |
1921 | |
1922 | switch (ioctl) { | |
1923 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
1924 | r = -EINVAL; |
1925 | if (arg) | |
1926 | goto out; | |
f17abe9a AK |
1927 | r = KVM_API_VERSION; |
1928 | break; | |
1929 | case KVM_CREATE_VM: | |
f0fe5108 AK |
1930 | r = -EINVAL; |
1931 | if (arg) | |
1932 | goto out; | |
f17abe9a AK |
1933 | r = kvm_dev_ioctl_create_vm(); |
1934 | break; | |
018d00d2 | 1935 | case KVM_CHECK_EXTENSION: |
1e1c65e0 | 1936 | r = kvm_dev_ioctl_check_extension(arg); |
5d308f45 | 1937 | break; |
07c45a36 AK |
1938 | case KVM_GET_VCPU_MMAP_SIZE: |
1939 | r = -EINVAL; | |
1940 | if (arg) | |
1941 | goto out; | |
adb1ff46 AK |
1942 | r = PAGE_SIZE; /* struct kvm_run */ |
1943 | #ifdef CONFIG_X86 | |
1944 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
1945 | #endif |
1946 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1947 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 1948 | #endif |
07c45a36 | 1949 | break; |
d4c9ff2d FEL |
1950 | case KVM_TRACE_ENABLE: |
1951 | case KVM_TRACE_PAUSE: | |
1952 | case KVM_TRACE_DISABLE: | |
1953 | r = kvm_trace_ioctl(ioctl, arg); | |
1954 | break; | |
6aa8b732 | 1955 | default: |
043405e1 | 1956 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
1957 | } |
1958 | out: | |
1959 | return r; | |
1960 | } | |
1961 | ||
6aa8b732 | 1962 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
1963 | .unlocked_ioctl = kvm_dev_ioctl, |
1964 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
1965 | }; |
1966 | ||
1967 | static struct miscdevice kvm_dev = { | |
bbe4432e | 1968 | KVM_MINOR, |
6aa8b732 AK |
1969 | "kvm", |
1970 | &kvm_chardev_ops, | |
1971 | }; | |
1972 | ||
1b6c0168 AK |
1973 | static void hardware_enable(void *junk) |
1974 | { | |
1975 | int cpu = raw_smp_processor_id(); | |
1976 | ||
1977 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
1978 | return; | |
1979 | cpu_set(cpu, cpus_hardware_enabled); | |
e9b11c17 | 1980 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
1981 | } |
1982 | ||
1983 | static void hardware_disable(void *junk) | |
1984 | { | |
1985 | int cpu = raw_smp_processor_id(); | |
1986 | ||
1987 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
1988 | return; | |
1989 | cpu_clear(cpu, cpus_hardware_enabled); | |
e9b11c17 | 1990 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
1991 | } |
1992 | ||
774c47f1 AK |
1993 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
1994 | void *v) | |
1995 | { | |
1996 | int cpu = (long)v; | |
1997 | ||
1a6f4d7f | 1998 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 1999 | switch (val) { |
cec9ad27 | 2000 | case CPU_DYING: |
6ec8a856 AK |
2001 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2002 | cpu); | |
2003 | hardware_disable(NULL); | |
2004 | break; | |
774c47f1 | 2005 | case CPU_UP_CANCELED: |
43934a38 JK |
2006 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2007 | cpu); | |
8691e5a8 | 2008 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
774c47f1 | 2009 | break; |
43934a38 JK |
2010 | case CPU_ONLINE: |
2011 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2012 | cpu); | |
8691e5a8 | 2013 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
774c47f1 AK |
2014 | break; |
2015 | } | |
2016 | return NOTIFY_OK; | |
2017 | } | |
2018 | ||
4ecac3fd AK |
2019 | |
2020 | asmlinkage void kvm_handle_fault_on_reboot(void) | |
2021 | { | |
2022 | if (kvm_rebooting) | |
2023 | /* spin while reset goes on */ | |
2024 | while (true) | |
2025 | ; | |
2026 | /* Fault while not rebooting. We want the trace. */ | |
2027 | BUG(); | |
2028 | } | |
2029 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); | |
2030 | ||
9a2b85c6 | 2031 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 2032 | void *v) |
9a2b85c6 RR |
2033 | { |
2034 | if (val == SYS_RESTART) { | |
2035 | /* | |
2036 | * Some (well, at least mine) BIOSes hang on reboot if | |
2037 | * in vmx root mode. | |
2038 | */ | |
2039 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
4ecac3fd | 2040 | kvm_rebooting = true; |
15c8b6c1 | 2041 | on_each_cpu(hardware_disable, NULL, 1); |
9a2b85c6 RR |
2042 | } |
2043 | return NOTIFY_OK; | |
2044 | } | |
2045 | ||
2046 | static struct notifier_block kvm_reboot_notifier = { | |
2047 | .notifier_call = kvm_reboot, | |
2048 | .priority = 0, | |
2049 | }; | |
2050 | ||
2eeb2e94 GH |
2051 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
2052 | { | |
2053 | memset(bus, 0, sizeof(*bus)); | |
2054 | } | |
2055 | ||
2056 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
2057 | { | |
2058 | int i; | |
2059 | ||
2060 | for (i = 0; i < bus->dev_count; i++) { | |
2061 | struct kvm_io_device *pos = bus->devs[i]; | |
2062 | ||
2063 | kvm_iodevice_destructor(pos); | |
2064 | } | |
2065 | } | |
2066 | ||
92760499 LV |
2067 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, |
2068 | gpa_t addr, int len, int is_write) | |
2eeb2e94 GH |
2069 | { |
2070 | int i; | |
2071 | ||
2072 | for (i = 0; i < bus->dev_count; i++) { | |
2073 | struct kvm_io_device *pos = bus->devs[i]; | |
2074 | ||
92760499 | 2075 | if (pos->in_range(pos, addr, len, is_write)) |
2eeb2e94 GH |
2076 | return pos; |
2077 | } | |
2078 | ||
2079 | return NULL; | |
2080 | } | |
2081 | ||
2082 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
2083 | { | |
2084 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
2085 | ||
2086 | bus->devs[bus->dev_count++] = dev; | |
2087 | } | |
2088 | ||
774c47f1 AK |
2089 | static struct notifier_block kvm_cpu_notifier = { |
2090 | .notifier_call = kvm_cpu_hotplug, | |
2091 | .priority = 20, /* must be > scheduler priority */ | |
2092 | }; | |
2093 | ||
8b88b099 | 2094 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
2095 | { |
2096 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
2097 | struct kvm *kvm; |
2098 | ||
8b88b099 | 2099 | *val = 0; |
ba1389b7 AK |
2100 | spin_lock(&kvm_lock); |
2101 | list_for_each_entry(kvm, &vm_list, vm_list) | |
8b88b099 | 2102 | *val += *(u32 *)((void *)kvm + offset); |
ba1389b7 | 2103 | spin_unlock(&kvm_lock); |
8b88b099 | 2104 | return 0; |
ba1389b7 AK |
2105 | } |
2106 | ||
2107 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
2108 | ||
8b88b099 | 2109 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
2110 | { |
2111 | unsigned offset = (long)_offset; | |
1165f5fe AK |
2112 | struct kvm *kvm; |
2113 | struct kvm_vcpu *vcpu; | |
2114 | int i; | |
2115 | ||
8b88b099 | 2116 | *val = 0; |
1165f5fe AK |
2117 | spin_lock(&kvm_lock); |
2118 | list_for_each_entry(kvm, &vm_list, vm_list) | |
2119 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
2120 | vcpu = kvm->vcpus[i]; |
2121 | if (vcpu) | |
8b88b099 | 2122 | *val += *(u32 *)((void *)vcpu + offset); |
1165f5fe AK |
2123 | } |
2124 | spin_unlock(&kvm_lock); | |
8b88b099 | 2125 | return 0; |
1165f5fe AK |
2126 | } |
2127 | ||
ba1389b7 AK |
2128 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
2129 | ||
2130 | static struct file_operations *stat_fops[] = { | |
2131 | [KVM_STAT_VCPU] = &vcpu_stat_fops, | |
2132 | [KVM_STAT_VM] = &vm_stat_fops, | |
2133 | }; | |
1165f5fe | 2134 | |
a16b043c | 2135 | static void kvm_init_debug(void) |
6aa8b732 AK |
2136 | { |
2137 | struct kvm_stats_debugfs_item *p; | |
2138 | ||
76f7c879 | 2139 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 2140 | for (p = debugfs_entries; p->name; ++p) |
76f7c879 | 2141 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 2142 | (void *)(long)p->offset, |
ba1389b7 | 2143 | stat_fops[p->kind]); |
6aa8b732 AK |
2144 | } |
2145 | ||
2146 | static void kvm_exit_debug(void) | |
2147 | { | |
2148 | struct kvm_stats_debugfs_item *p; | |
2149 | ||
2150 | for (p = debugfs_entries; p->name; ++p) | |
2151 | debugfs_remove(p->dentry); | |
76f7c879 | 2152 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
2153 | } |
2154 | ||
59ae6c6b AK |
2155 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2156 | { | |
4267c41a | 2157 | hardware_disable(NULL); |
59ae6c6b AK |
2158 | return 0; |
2159 | } | |
2160 | ||
2161 | static int kvm_resume(struct sys_device *dev) | |
2162 | { | |
4267c41a | 2163 | hardware_enable(NULL); |
59ae6c6b AK |
2164 | return 0; |
2165 | } | |
2166 | ||
2167 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 2168 | .name = "kvm", |
59ae6c6b AK |
2169 | .suspend = kvm_suspend, |
2170 | .resume = kvm_resume, | |
2171 | }; | |
2172 | ||
2173 | static struct sys_device kvm_sysdev = { | |
2174 | .id = 0, | |
2175 | .cls = &kvm_sysdev_class, | |
2176 | }; | |
2177 | ||
cea7bb21 | 2178 | struct page *bad_page; |
35149e21 | 2179 | pfn_t bad_pfn; |
6aa8b732 | 2180 | |
15ad7146 AK |
2181 | static inline |
2182 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
2183 | { | |
2184 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
2185 | } | |
2186 | ||
2187 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
2188 | { | |
2189 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2190 | ||
e9b11c17 | 2191 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
2192 | } |
2193 | ||
2194 | static void kvm_sched_out(struct preempt_notifier *pn, | |
2195 | struct task_struct *next) | |
2196 | { | |
2197 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2198 | ||
e9b11c17 | 2199 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
2200 | } |
2201 | ||
f8c16bba | 2202 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 2203 | struct module *module) |
6aa8b732 AK |
2204 | { |
2205 | int r; | |
002c7f7c | 2206 | int cpu; |
6aa8b732 | 2207 | |
cb498ea2 ZX |
2208 | kvm_init_debug(); |
2209 | ||
f8c16bba ZX |
2210 | r = kvm_arch_init(opaque); |
2211 | if (r) | |
d2308784 | 2212 | goto out_fail; |
cb498ea2 ZX |
2213 | |
2214 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2215 | ||
2216 | if (bad_page == NULL) { | |
2217 | r = -ENOMEM; | |
2218 | goto out; | |
2219 | } | |
2220 | ||
35149e21 AL |
2221 | bad_pfn = page_to_pfn(bad_page); |
2222 | ||
e9b11c17 | 2223 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2224 | if (r < 0) |
d2308784 | 2225 | goto out_free_0; |
6aa8b732 | 2226 | |
002c7f7c YS |
2227 | for_each_online_cpu(cpu) { |
2228 | smp_call_function_single(cpu, | |
e9b11c17 | 2229 | kvm_arch_check_processor_compat, |
8691e5a8 | 2230 | &r, 1); |
002c7f7c | 2231 | if (r < 0) |
d2308784 | 2232 | goto out_free_1; |
002c7f7c YS |
2233 | } |
2234 | ||
15c8b6c1 | 2235 | on_each_cpu(hardware_enable, NULL, 1); |
774c47f1 AK |
2236 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2237 | if (r) | |
d2308784 | 2238 | goto out_free_2; |
6aa8b732 AK |
2239 | register_reboot_notifier(&kvm_reboot_notifier); |
2240 | ||
59ae6c6b AK |
2241 | r = sysdev_class_register(&kvm_sysdev_class); |
2242 | if (r) | |
d2308784 | 2243 | goto out_free_3; |
59ae6c6b AK |
2244 | |
2245 | r = sysdev_register(&kvm_sysdev); | |
2246 | if (r) | |
d2308784 | 2247 | goto out_free_4; |
59ae6c6b | 2248 | |
c16f862d RR |
2249 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
2250 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
56919c5c JP |
2251 | __alignof__(struct kvm_vcpu), |
2252 | 0, NULL); | |
c16f862d RR |
2253 | if (!kvm_vcpu_cache) { |
2254 | r = -ENOMEM; | |
d2308784 | 2255 | goto out_free_5; |
c16f862d RR |
2256 | } |
2257 | ||
6aa8b732 AK |
2258 | kvm_chardev_ops.owner = module; |
2259 | ||
2260 | r = misc_register(&kvm_dev); | |
2261 | if (r) { | |
d77c26fc | 2262 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
2263 | goto out_free; |
2264 | } | |
2265 | ||
15ad7146 AK |
2266 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2267 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
5319c662 SY |
2268 | #ifndef CONFIG_X86 |
2269 | msi2intx = 0; | |
2270 | #endif | |
15ad7146 | 2271 | |
c7addb90 | 2272 | return 0; |
6aa8b732 AK |
2273 | |
2274 | out_free: | |
c16f862d | 2275 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2276 | out_free_5: |
59ae6c6b | 2277 | sysdev_unregister(&kvm_sysdev); |
d2308784 | 2278 | out_free_4: |
59ae6c6b | 2279 | sysdev_class_unregister(&kvm_sysdev_class); |
d2308784 | 2280 | out_free_3: |
6aa8b732 | 2281 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2282 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2283 | out_free_2: |
15c8b6c1 | 2284 | on_each_cpu(hardware_disable, NULL, 1); |
d2308784 | 2285 | out_free_1: |
e9b11c17 | 2286 | kvm_arch_hardware_unsetup(); |
d2308784 ZX |
2287 | out_free_0: |
2288 | __free_page(bad_page); | |
ca45aaae | 2289 | out: |
f8c16bba | 2290 | kvm_arch_exit(); |
cb498ea2 | 2291 | kvm_exit_debug(); |
d2308784 | 2292 | out_fail: |
6aa8b732 AK |
2293 | return r; |
2294 | } | |
cb498ea2 | 2295 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2296 | |
cb498ea2 | 2297 | void kvm_exit(void) |
6aa8b732 | 2298 | { |
d4c9ff2d | 2299 | kvm_trace_cleanup(); |
6aa8b732 | 2300 | misc_deregister(&kvm_dev); |
c16f862d | 2301 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
2302 | sysdev_unregister(&kvm_sysdev); |
2303 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2304 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2305 | unregister_cpu_notifier(&kvm_cpu_notifier); |
15c8b6c1 | 2306 | on_each_cpu(hardware_disable, NULL, 1); |
e9b11c17 | 2307 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2308 | kvm_arch_exit(); |
6aa8b732 | 2309 | kvm_exit_debug(); |
cea7bb21 | 2310 | __free_page(bad_page); |
6aa8b732 | 2311 | } |
cb498ea2 | 2312 | EXPORT_SYMBOL_GPL(kvm_exit); |