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 | |
7f59f492 | 73 | static cpumask_var_t cpus_hardware_enabled; |
1b6c0168 | 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); | |
defaf158 | 173 | assigned_dev->host_irq_disabled = false; |
6b9cc7fd | 174 | } |
8a98f664 | 175 | mutex_unlock(&assigned_dev->kvm->lock); |
8a98f664 XZ |
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 | ||
8a98f664 | 183 | schedule_work(&assigned_dev->interrupt_work); |
defaf158 | 184 | |
8a98f664 | 185 | disable_irq_nosync(irq); |
defaf158 MM |
186 | assigned_dev->host_irq_disabled = true; |
187 | ||
8a98f664 XZ |
188 | return IRQ_HANDLED; |
189 | } | |
190 | ||
191 | /* Ack the irq line for an assigned device */ | |
192 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) | |
193 | { | |
194 | struct kvm_assigned_dev_kernel *dev; | |
195 | ||
196 | if (kian->gsi == -1) | |
197 | return; | |
198 | ||
199 | dev = container_of(kian, struct kvm_assigned_dev_kernel, | |
200 | ack_notifier); | |
defaf158 | 201 | |
5550af4d | 202 | kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); |
defaf158 MM |
203 | |
204 | /* The guest irq may be shared so this ack may be | |
205 | * from another device. | |
206 | */ | |
207 | if (dev->host_irq_disabled) { | |
208 | enable_irq(dev->host_irq); | |
209 | dev->host_irq_disabled = false; | |
210 | } | |
8a98f664 XZ |
211 | } |
212 | ||
ba4cef31 | 213 | /* The function implicit hold kvm->lock mutex due to cancel_work_sync() */ |
4a643be8 MM |
214 | static void kvm_free_assigned_irq(struct kvm *kvm, |
215 | struct kvm_assigned_dev_kernel *assigned_dev) | |
8a98f664 | 216 | { |
4a643be8 MM |
217 | if (!irqchip_in_kernel(kvm)) |
218 | return; | |
8a98f664 | 219 | |
e19e30ef | 220 | kvm_unregister_irq_ack_notifier(&assigned_dev->ack_notifier); |
f29b2673 MM |
221 | |
222 | if (assigned_dev->irq_source_id != -1) | |
223 | kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); | |
224 | assigned_dev->irq_source_id = -1; | |
8a98f664 | 225 | |
4a643be8 MM |
226 | if (!assigned_dev->irq_requested_type) |
227 | return; | |
228 | ||
ba4cef31 SY |
229 | /* |
230 | * In kvm_free_device_irq, cancel_work_sync return true if: | |
231 | * 1. work is scheduled, and then cancelled. | |
232 | * 2. work callback is executed. | |
233 | * | |
234 | * The first one ensured that the irq is disabled and no more events | |
235 | * would happen. But for the second one, the irq may be enabled (e.g. | |
236 | * for MSI). So we disable irq here to prevent further events. | |
237 | * | |
238 | * Notice this maybe result in nested disable if the interrupt type is | |
239 | * INTx, but it's OK for we are going to free it. | |
240 | * | |
241 | * If this function is a part of VM destroy, please ensure that till | |
242 | * now, the kvm state is still legal for probably we also have to wait | |
243 | * interrupt_work done. | |
244 | */ | |
245 | disable_irq_nosync(assigned_dev->host_irq); | |
246 | cancel_work_sync(&assigned_dev->interrupt_work); | |
8a98f664 | 247 | |
4a643be8 MM |
248 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); |
249 | ||
250 | if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) | |
251 | pci_disable_msi(assigned_dev->dev); | |
252 | ||
253 | assigned_dev->irq_requested_type = 0; | |
254 | } | |
255 | ||
256 | ||
257 | static void kvm_free_assigned_device(struct kvm *kvm, | |
258 | struct kvm_assigned_dev_kernel | |
259 | *assigned_dev) | |
260 | { | |
261 | kvm_free_assigned_irq(kvm, assigned_dev); | |
262 | ||
6eb55818 SY |
263 | pci_reset_function(assigned_dev->dev); |
264 | ||
8a98f664 XZ |
265 | pci_release_regions(assigned_dev->dev); |
266 | pci_disable_device(assigned_dev->dev); | |
267 | pci_dev_put(assigned_dev->dev); | |
268 | ||
269 | list_del(&assigned_dev->list); | |
270 | kfree(assigned_dev); | |
271 | } | |
272 | ||
273 | void kvm_free_all_assigned_devices(struct kvm *kvm) | |
274 | { | |
275 | struct list_head *ptr, *ptr2; | |
276 | struct kvm_assigned_dev_kernel *assigned_dev; | |
277 | ||
278 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { | |
279 | assigned_dev = list_entry(ptr, | |
280 | struct kvm_assigned_dev_kernel, | |
281 | list); | |
282 | ||
283 | kvm_free_assigned_device(kvm, assigned_dev); | |
284 | } | |
285 | } | |
286 | ||
00e3ed39 SY |
287 | static int assigned_device_update_intx(struct kvm *kvm, |
288 | struct kvm_assigned_dev_kernel *adev, | |
289 | struct kvm_assigned_irq *airq) | |
290 | { | |
fbac7818 SY |
291 | adev->guest_irq = airq->guest_irq; |
292 | adev->ack_notifier.gsi = airq->guest_irq; | |
293 | ||
294 | if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_INTX) | |
00e3ed39 | 295 | return 0; |
00e3ed39 SY |
296 | |
297 | if (irqchip_in_kernel(kvm)) { | |
5319c662 | 298 | if (!msi2intx && |
d7cff1c3 SY |
299 | (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)) { |
300 | free_irq(adev->host_irq, (void *)adev); | |
6b9cc7fd SY |
301 | pci_disable_msi(adev->dev); |
302 | } | |
303 | ||
00e3ed39 SY |
304 | if (!capable(CAP_SYS_RAWIO)) |
305 | return -EPERM; | |
306 | ||
307 | if (airq->host_irq) | |
308 | adev->host_irq = airq->host_irq; | |
309 | else | |
310 | adev->host_irq = adev->dev->irq; | |
00e3ed39 SY |
311 | |
312 | /* Even though this is PCI, we don't want to use shared | |
313 | * interrupts. Sharing host devices with guest-assigned devices | |
314 | * on the same interrupt line is not a happy situation: there | |
315 | * are going to be long delays in accepting, acking, etc. | |
316 | */ | |
317 | if (request_irq(adev->host_irq, kvm_assigned_dev_intr, | |
318 | 0, "kvm_assigned_intx_device", (void *)adev)) | |
319 | return -EIO; | |
320 | } | |
321 | ||
4f906c19 SY |
322 | adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_INTX | |
323 | KVM_ASSIGNED_DEV_HOST_INTX; | |
00e3ed39 SY |
324 | return 0; |
325 | } | |
326 | ||
6b9cc7fd SY |
327 | #ifdef CONFIG_X86 |
328 | static int assigned_device_update_msi(struct kvm *kvm, | |
329 | struct kvm_assigned_dev_kernel *adev, | |
330 | struct kvm_assigned_irq *airq) | |
331 | { | |
332 | int r; | |
333 | ||
5319c662 SY |
334 | if (airq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI) { |
335 | /* x86 don't care upper address of guest msi message addr */ | |
336 | adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_MSI; | |
337 | adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_INTX; | |
338 | adev->guest_msi.address_lo = airq->guest_msi.addr_lo; | |
339 | adev->guest_msi.data = airq->guest_msi.data; | |
340 | adev->ack_notifier.gsi = -1; | |
341 | } else if (msi2intx) { | |
342 | adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_INTX; | |
343 | adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_MSI; | |
344 | adev->guest_irq = airq->guest_irq; | |
345 | adev->ack_notifier.gsi = airq->guest_irq; | |
346 | } | |
6b9cc7fd SY |
347 | |
348 | if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) | |
349 | return 0; | |
350 | ||
351 | if (irqchip_in_kernel(kvm)) { | |
5319c662 SY |
352 | if (!msi2intx) { |
353 | if (adev->irq_requested_type & | |
354 | KVM_ASSIGNED_DEV_HOST_INTX) | |
355 | free_irq(adev->host_irq, (void *)adev); | |
356 | ||
357 | r = pci_enable_msi(adev->dev); | |
358 | if (r) | |
359 | return r; | |
360 | } | |
6b9cc7fd SY |
361 | |
362 | adev->host_irq = adev->dev->irq; | |
363 | if (request_irq(adev->host_irq, kvm_assigned_dev_intr, 0, | |
364 | "kvm_assigned_msi_device", (void *)adev)) | |
365 | return -EIO; | |
366 | } | |
367 | ||
5319c662 SY |
368 | if (!msi2intx) |
369 | adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_MSI; | |
370 | ||
371 | adev->irq_requested_type |= KVM_ASSIGNED_DEV_HOST_MSI; | |
6b9cc7fd SY |
372 | return 0; |
373 | } | |
374 | #endif | |
375 | ||
8a98f664 XZ |
376 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, |
377 | struct kvm_assigned_irq | |
378 | *assigned_irq) | |
379 | { | |
380 | int r = 0; | |
381 | struct kvm_assigned_dev_kernel *match; | |
382 | ||
383 | mutex_lock(&kvm->lock); | |
384 | ||
385 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
386 | assigned_irq->assigned_dev_id); | |
387 | if (!match) { | |
388 | mutex_unlock(&kvm->lock); | |
389 | return -EINVAL; | |
390 | } | |
391 | ||
4f906c19 | 392 | if (!match->irq_requested_type) { |
342ffb93 SY |
393 | INIT_WORK(&match->interrupt_work, |
394 | kvm_assigned_dev_interrupt_work_handler); | |
395 | if (irqchip_in_kernel(kvm)) { | |
396 | /* Register ack nofitier */ | |
397 | match->ack_notifier.gsi = -1; | |
398 | match->ack_notifier.irq_acked = | |
399 | kvm_assigned_dev_ack_irq; | |
400 | kvm_register_irq_ack_notifier(kvm, | |
401 | &match->ack_notifier); | |
402 | ||
403 | /* Request IRQ source ID */ | |
404 | r = kvm_request_irq_source_id(kvm); | |
405 | if (r < 0) | |
406 | goto out_release; | |
407 | else | |
408 | match->irq_source_id = r; | |
5319c662 SY |
409 | |
410 | #ifdef CONFIG_X86 | |
411 | /* Determine host device irq type, we can know the | |
412 | * result from dev->msi_enabled */ | |
413 | if (msi2intx) | |
414 | pci_enable_msi(match->dev); | |
415 | #endif | |
342ffb93 | 416 | } |
8a98f664 XZ |
417 | } |
418 | ||
5319c662 SY |
419 | if ((!msi2intx && |
420 | (assigned_irq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI)) || | |
421 | (msi2intx && match->dev->msi_enabled)) { | |
6b9cc7fd SY |
422 | #ifdef CONFIG_X86 |
423 | r = assigned_device_update_msi(kvm, match, assigned_irq); | |
424 | if (r) { | |
425 | printk(KERN_WARNING "kvm: failed to enable " | |
426 | "MSI device!\n"); | |
427 | goto out_release; | |
428 | } | |
429 | #else | |
430 | r = -ENOTTY; | |
431 | #endif | |
432 | } else if (assigned_irq->host_irq == 0 && match->dev->irq == 0) { | |
433 | /* Host device IRQ 0 means don't support INTx */ | |
5319c662 SY |
434 | if (!msi2intx) { |
435 | printk(KERN_WARNING | |
436 | "kvm: wait device to enable MSI!\n"); | |
437 | r = 0; | |
438 | } else { | |
439 | printk(KERN_WARNING | |
440 | "kvm: failed to enable MSI device!\n"); | |
441 | r = -ENOTTY; | |
442 | goto out_release; | |
443 | } | |
6b9cc7fd SY |
444 | } else { |
445 | /* Non-sharing INTx mode */ | |
446 | r = assigned_device_update_intx(kvm, match, assigned_irq); | |
447 | if (r) { | |
448 | printk(KERN_WARNING "kvm: failed to enable " | |
449 | "INTx device!\n"); | |
450 | goto out_release; | |
451 | } | |
452 | } | |
8a98f664 | 453 | |
8a98f664 XZ |
454 | mutex_unlock(&kvm->lock); |
455 | return r; | |
456 | out_release: | |
457 | mutex_unlock(&kvm->lock); | |
458 | kvm_free_assigned_device(kvm, match); | |
459 | return r; | |
460 | } | |
461 | ||
462 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, | |
463 | struct kvm_assigned_pci_dev *assigned_dev) | |
464 | { | |
465 | int r = 0; | |
466 | struct kvm_assigned_dev_kernel *match; | |
467 | struct pci_dev *dev; | |
468 | ||
682edb4c | 469 | down_read(&kvm->slots_lock); |
8a98f664 XZ |
470 | mutex_lock(&kvm->lock); |
471 | ||
472 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
473 | assigned_dev->assigned_dev_id); | |
474 | if (match) { | |
475 | /* device already assigned */ | |
476 | r = -EINVAL; | |
477 | goto out; | |
478 | } | |
479 | ||
480 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); | |
481 | if (match == NULL) { | |
482 | printk(KERN_INFO "%s: Couldn't allocate memory\n", | |
483 | __func__); | |
484 | r = -ENOMEM; | |
485 | goto out; | |
486 | } | |
487 | dev = pci_get_bus_and_slot(assigned_dev->busnr, | |
488 | assigned_dev->devfn); | |
489 | if (!dev) { | |
490 | printk(KERN_INFO "%s: host device not found\n", __func__); | |
491 | r = -EINVAL; | |
492 | goto out_free; | |
493 | } | |
494 | if (pci_enable_device(dev)) { | |
495 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); | |
496 | r = -EBUSY; | |
497 | goto out_put; | |
498 | } | |
499 | r = pci_request_regions(dev, "kvm_assigned_device"); | |
500 | if (r) { | |
501 | printk(KERN_INFO "%s: Could not get access to device regions\n", | |
502 | __func__); | |
503 | goto out_disable; | |
504 | } | |
6eb55818 SY |
505 | |
506 | pci_reset_function(dev); | |
507 | ||
8a98f664 XZ |
508 | match->assigned_dev_id = assigned_dev->assigned_dev_id; |
509 | match->host_busnr = assigned_dev->busnr; | |
510 | match->host_devfn = assigned_dev->devfn; | |
b653574a | 511 | match->flags = assigned_dev->flags; |
8a98f664 | 512 | match->dev = dev; |
f29b2673 | 513 | match->irq_source_id = -1; |
8a98f664 XZ |
514 | match->kvm = kvm; |
515 | ||
516 | list_add(&match->list, &kvm->arch.assigned_dev_head); | |
517 | ||
518 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { | |
19de40a8 | 519 | if (!kvm->arch.iommu_domain) { |
260782bc WH |
520 | r = kvm_iommu_map_guest(kvm); |
521 | if (r) | |
522 | goto out_list_del; | |
523 | } | |
524 | r = kvm_assign_device(kvm, match); | |
8a98f664 XZ |
525 | if (r) |
526 | goto out_list_del; | |
527 | } | |
528 | ||
529 | out: | |
530 | mutex_unlock(&kvm->lock); | |
682edb4c | 531 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
532 | return r; |
533 | out_list_del: | |
534 | list_del(&match->list); | |
535 | pci_release_regions(dev); | |
536 | out_disable: | |
537 | pci_disable_device(dev); | |
538 | out_put: | |
539 | pci_dev_put(dev); | |
540 | out_free: | |
541 | kfree(match); | |
542 | mutex_unlock(&kvm->lock); | |
682edb4c | 543 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
544 | return r; |
545 | } | |
546 | #endif | |
547 | ||
0a920356 WH |
548 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT |
549 | static int kvm_vm_ioctl_deassign_device(struct kvm *kvm, | |
550 | struct kvm_assigned_pci_dev *assigned_dev) | |
551 | { | |
552 | int r = 0; | |
553 | struct kvm_assigned_dev_kernel *match; | |
554 | ||
555 | mutex_lock(&kvm->lock); | |
556 | ||
557 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
558 | assigned_dev->assigned_dev_id); | |
559 | if (!match) { | |
560 | printk(KERN_INFO "%s: device hasn't been assigned before, " | |
561 | "so cannot be deassigned\n", __func__); | |
562 | r = -EINVAL; | |
563 | goto out; | |
564 | } | |
565 | ||
566 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) | |
567 | kvm_deassign_device(kvm, match); | |
568 | ||
569 | kvm_free_assigned_device(kvm, match); | |
570 | ||
571 | out: | |
572 | mutex_unlock(&kvm->lock); | |
573 | return r; | |
574 | } | |
575 | #endif | |
576 | ||
5aacf0ca JM |
577 | static inline int valid_vcpu(int n) |
578 | { | |
579 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
580 | } | |
581 | ||
c77fb9dc | 582 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
cbff90a7 BAY |
583 | { |
584 | if (pfn_valid(pfn)) | |
585 | return PageReserved(pfn_to_page(pfn)); | |
586 | ||
587 | return true; | |
588 | } | |
589 | ||
bccf2150 AK |
590 | /* |
591 | * Switches to specified vcpu, until a matching vcpu_put() | |
592 | */ | |
313a3dc7 | 593 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 594 | { |
15ad7146 AK |
595 | int cpu; |
596 | ||
bccf2150 | 597 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
598 | cpu = get_cpu(); |
599 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 600 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 601 | put_cpu(); |
6aa8b732 AK |
602 | } |
603 | ||
313a3dc7 | 604 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 605 | { |
15ad7146 | 606 | preempt_disable(); |
313a3dc7 | 607 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
608 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
609 | preempt_enable(); | |
6aa8b732 AK |
610 | mutex_unlock(&vcpu->mutex); |
611 | } | |
612 | ||
d9e368d6 AK |
613 | static void ack_flush(void *_completed) |
614 | { | |
d9e368d6 AK |
615 | } |
616 | ||
49846896 | 617 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
d9e368d6 | 618 | { |
597a5f55 | 619 | int i, cpu, me; |
6ef7a1bc RR |
620 | cpumask_var_t cpus; |
621 | bool called = true; | |
d9e368d6 | 622 | struct kvm_vcpu *vcpu; |
d9e368d6 | 623 | |
6ef7a1bc RR |
624 | if (alloc_cpumask_var(&cpus, GFP_ATOMIC)) |
625 | cpumask_clear(cpus); | |
626 | ||
597a5f55 | 627 | me = get_cpu(); |
fb3f0f51 RR |
628 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
629 | vcpu = kvm->vcpus[i]; | |
630 | if (!vcpu) | |
631 | continue; | |
49846896 | 632 | if (test_and_set_bit(req, &vcpu->requests)) |
d9e368d6 AK |
633 | continue; |
634 | cpu = vcpu->cpu; | |
6ef7a1bc RR |
635 | if (cpus != NULL && cpu != -1 && cpu != me) |
636 | cpumask_set_cpu(cpu, cpus); | |
49846896 | 637 | } |
6ef7a1bc RR |
638 | if (unlikely(cpus == NULL)) |
639 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); | |
640 | else if (!cpumask_empty(cpus)) | |
641 | smp_call_function_many(cpus, ack_flush, NULL, 1); | |
642 | else | |
643 | called = false; | |
597a5f55 | 644 | put_cpu(); |
6ef7a1bc | 645 | free_cpumask_var(cpus); |
49846896 | 646 | return called; |
d9e368d6 AK |
647 | } |
648 | ||
49846896 | 649 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
2e53d63a | 650 | { |
49846896 RR |
651 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
652 | ++kvm->stat.remote_tlb_flush; | |
2e53d63a MT |
653 | } |
654 | ||
49846896 RR |
655 | void kvm_reload_remote_mmus(struct kvm *kvm) |
656 | { | |
657 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); | |
658 | } | |
2e53d63a | 659 | |
fb3f0f51 RR |
660 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
661 | { | |
662 | struct page *page; | |
663 | int r; | |
664 | ||
665 | mutex_init(&vcpu->mutex); | |
666 | vcpu->cpu = -1; | |
fb3f0f51 RR |
667 | vcpu->kvm = kvm; |
668 | vcpu->vcpu_id = id; | |
b6958ce4 | 669 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
670 | |
671 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
672 | if (!page) { | |
673 | r = -ENOMEM; | |
674 | goto fail; | |
675 | } | |
676 | vcpu->run = page_address(page); | |
677 | ||
e9b11c17 | 678 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 679 | if (r < 0) |
e9b11c17 | 680 | goto fail_free_run; |
fb3f0f51 RR |
681 | return 0; |
682 | ||
fb3f0f51 RR |
683 | fail_free_run: |
684 | free_page((unsigned long)vcpu->run); | |
685 | fail: | |
76fafa5e | 686 | return r; |
fb3f0f51 RR |
687 | } |
688 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
689 | ||
690 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
691 | { | |
e9b11c17 | 692 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
693 | free_page((unsigned long)vcpu->run); |
694 | } | |
695 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
696 | ||
e930bffe AA |
697 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
698 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
699 | { | |
700 | return container_of(mn, struct kvm, mmu_notifier); | |
701 | } | |
702 | ||
703 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
704 | struct mm_struct *mm, | |
705 | unsigned long address) | |
706 | { | |
707 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
708 | int need_tlb_flush; | |
709 | ||
710 | /* | |
711 | * When ->invalidate_page runs, the linux pte has been zapped | |
712 | * already but the page is still allocated until | |
713 | * ->invalidate_page returns. So if we increase the sequence | |
714 | * here the kvm page fault will notice if the spte can't be | |
715 | * established because the page is going to be freed. If | |
716 | * instead the kvm page fault establishes the spte before | |
717 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
718 | * before returning. | |
719 | * | |
720 | * The sequence increase only need to be seen at spin_unlock | |
721 | * time, and not at spin_lock time. | |
722 | * | |
723 | * Increasing the sequence after the spin_unlock would be | |
724 | * unsafe because the kvm page fault could then establish the | |
725 | * pte after kvm_unmap_hva returned, without noticing the page | |
726 | * is going to be freed. | |
727 | */ | |
728 | spin_lock(&kvm->mmu_lock); | |
729 | kvm->mmu_notifier_seq++; | |
730 | need_tlb_flush = kvm_unmap_hva(kvm, address); | |
731 | spin_unlock(&kvm->mmu_lock); | |
732 | ||
733 | /* we've to flush the tlb before the pages can be freed */ | |
734 | if (need_tlb_flush) | |
735 | kvm_flush_remote_tlbs(kvm); | |
736 | ||
737 | } | |
738 | ||
739 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, | |
740 | struct mm_struct *mm, | |
741 | unsigned long start, | |
742 | unsigned long end) | |
743 | { | |
744 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
745 | int need_tlb_flush = 0; | |
746 | ||
747 | spin_lock(&kvm->mmu_lock); | |
748 | /* | |
749 | * The count increase must become visible at unlock time as no | |
750 | * spte can be established without taking the mmu_lock and | |
751 | * count is also read inside the mmu_lock critical section. | |
752 | */ | |
753 | kvm->mmu_notifier_count++; | |
754 | for (; start < end; start += PAGE_SIZE) | |
755 | need_tlb_flush |= kvm_unmap_hva(kvm, start); | |
756 | spin_unlock(&kvm->mmu_lock); | |
757 | ||
758 | /* we've to flush the tlb before the pages can be freed */ | |
759 | if (need_tlb_flush) | |
760 | kvm_flush_remote_tlbs(kvm); | |
761 | } | |
762 | ||
763 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
764 | struct mm_struct *mm, | |
765 | unsigned long start, | |
766 | unsigned long end) | |
767 | { | |
768 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
769 | ||
770 | spin_lock(&kvm->mmu_lock); | |
771 | /* | |
772 | * This sequence increase will notify the kvm page fault that | |
773 | * the page that is going to be mapped in the spte could have | |
774 | * been freed. | |
775 | */ | |
776 | kvm->mmu_notifier_seq++; | |
777 | /* | |
778 | * The above sequence increase must be visible before the | |
779 | * below count decrease but both values are read by the kvm | |
780 | * page fault under mmu_lock spinlock so we don't need to add | |
781 | * a smb_wmb() here in between the two. | |
782 | */ | |
783 | kvm->mmu_notifier_count--; | |
784 | spin_unlock(&kvm->mmu_lock); | |
785 | ||
786 | BUG_ON(kvm->mmu_notifier_count < 0); | |
787 | } | |
788 | ||
789 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
790 | struct mm_struct *mm, | |
791 | unsigned long address) | |
792 | { | |
793 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
794 | int young; | |
795 | ||
796 | spin_lock(&kvm->mmu_lock); | |
797 | young = kvm_age_hva(kvm, address); | |
798 | spin_unlock(&kvm->mmu_lock); | |
799 | ||
800 | if (young) | |
801 | kvm_flush_remote_tlbs(kvm); | |
802 | ||
803 | return young; | |
804 | } | |
805 | ||
85db06e5 MT |
806 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
807 | struct mm_struct *mm) | |
808 | { | |
809 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
810 | kvm_arch_flush_shadow(kvm); | |
811 | } | |
812 | ||
e930bffe AA |
813 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
814 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
815 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
816 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
817 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
85db06e5 | 818 | .release = kvm_mmu_notifier_release, |
e930bffe AA |
819 | }; |
820 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ | |
821 | ||
f17abe9a | 822 | static struct kvm *kvm_create_vm(void) |
6aa8b732 | 823 | { |
d19a9cd2 | 824 | struct kvm *kvm = kvm_arch_create_vm(); |
5f94c174 LV |
825 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
826 | struct page *page; | |
827 | #endif | |
6aa8b732 | 828 | |
d19a9cd2 ZX |
829 | if (IS_ERR(kvm)) |
830 | goto out; | |
6aa8b732 | 831 | |
5f94c174 LV |
832 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
833 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
834 | if (!page) { | |
835 | kfree(kvm); | |
836 | return ERR_PTR(-ENOMEM); | |
837 | } | |
838 | kvm->coalesced_mmio_ring = | |
839 | (struct kvm_coalesced_mmio_ring *)page_address(page); | |
840 | #endif | |
841 | ||
e930bffe AA |
842 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
843 | { | |
844 | int err; | |
845 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
846 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
847 | if (err) { | |
848 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
849 | put_page(page); | |
850 | #endif | |
851 | kfree(kvm); | |
852 | return ERR_PTR(err); | |
853 | } | |
854 | } | |
855 | #endif | |
856 | ||
6d4e4c4f AK |
857 | kvm->mm = current->mm; |
858 | atomic_inc(&kvm->mm->mm_count); | |
aaee2c94 | 859 | spin_lock_init(&kvm->mmu_lock); |
74906345 | 860 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 861 | mutex_init(&kvm->lock); |
2eeb2e94 | 862 | kvm_io_bus_init(&kvm->mmio_bus); |
72dc67a6 | 863 | init_rwsem(&kvm->slots_lock); |
d39f13b0 | 864 | atomic_set(&kvm->users_count, 1); |
5e58cfe4 RR |
865 | spin_lock(&kvm_lock); |
866 | list_add(&kvm->vm_list, &vm_list); | |
867 | spin_unlock(&kvm_lock); | |
5f94c174 LV |
868 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
869 | kvm_coalesced_mmio_init(kvm); | |
870 | #endif | |
d19a9cd2 | 871 | out: |
f17abe9a AK |
872 | return kvm; |
873 | } | |
874 | ||
6aa8b732 AK |
875 | /* |
876 | * Free any memory in @free but not in @dont. | |
877 | */ | |
878 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
879 | struct kvm_memory_slot *dont) | |
880 | { | |
290fc38d IE |
881 | if (!dont || free->rmap != dont->rmap) |
882 | vfree(free->rmap); | |
6aa8b732 AK |
883 | |
884 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
885 | vfree(free->dirty_bitmap); | |
886 | ||
05da4558 MT |
887 | if (!dont || free->lpage_info != dont->lpage_info) |
888 | vfree(free->lpage_info); | |
889 | ||
6aa8b732 | 890 | free->npages = 0; |
8b6d44c7 | 891 | free->dirty_bitmap = NULL; |
8d4e1288 | 892 | free->rmap = NULL; |
05da4558 | 893 | free->lpage_info = NULL; |
6aa8b732 AK |
894 | } |
895 | ||
d19a9cd2 | 896 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 AK |
897 | { |
898 | int i; | |
899 | ||
900 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 901 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
902 | } |
903 | ||
f17abe9a AK |
904 | static void kvm_destroy_vm(struct kvm *kvm) |
905 | { | |
6d4e4c4f AK |
906 | struct mm_struct *mm = kvm->mm; |
907 | ||
ad8ba2cd | 908 | kvm_arch_sync_events(kvm); |
133de902 AK |
909 | spin_lock(&kvm_lock); |
910 | list_del(&kvm->vm_list); | |
911 | spin_unlock(&kvm_lock); | |
74906345 | 912 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 913 | kvm_io_bus_destroy(&kvm->mmio_bus); |
5f94c174 LV |
914 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
915 | if (kvm->coalesced_mmio_ring != NULL) | |
916 | free_page((unsigned long)kvm->coalesced_mmio_ring); | |
e930bffe AA |
917 | #endif |
918 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) | |
919 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
5f94c174 | 920 | #endif |
d19a9cd2 | 921 | kvm_arch_destroy_vm(kvm); |
6d4e4c4f | 922 | mmdrop(mm); |
f17abe9a AK |
923 | } |
924 | ||
d39f13b0 IE |
925 | void kvm_get_kvm(struct kvm *kvm) |
926 | { | |
927 | atomic_inc(&kvm->users_count); | |
928 | } | |
929 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
930 | ||
931 | void kvm_put_kvm(struct kvm *kvm) | |
932 | { | |
933 | if (atomic_dec_and_test(&kvm->users_count)) | |
934 | kvm_destroy_vm(kvm); | |
935 | } | |
936 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
937 | ||
938 | ||
f17abe9a AK |
939 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
940 | { | |
941 | struct kvm *kvm = filp->private_data; | |
942 | ||
d39f13b0 | 943 | kvm_put_kvm(kvm); |
6aa8b732 AK |
944 | return 0; |
945 | } | |
946 | ||
6aa8b732 AK |
947 | /* |
948 | * Allocate some memory and give it an address in the guest physical address | |
949 | * space. | |
950 | * | |
951 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 952 | * |
10589a46 | 953 | * Must be called holding mmap_sem for write. |
6aa8b732 | 954 | */ |
f78e0e2e SY |
955 | int __kvm_set_memory_region(struct kvm *kvm, |
956 | struct kvm_userspace_memory_region *mem, | |
957 | int user_alloc) | |
6aa8b732 AK |
958 | { |
959 | int r; | |
960 | gfn_t base_gfn; | |
961 | unsigned long npages; | |
962 | unsigned long i; | |
963 | struct kvm_memory_slot *memslot; | |
964 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
965 | |
966 | r = -EINVAL; | |
967 | /* General sanity checks */ | |
968 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
969 | goto out; | |
970 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
971 | goto out; | |
e7cacd40 | 972 | if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) |
78749809 | 973 | goto out; |
e0d62c7f | 974 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
975 | goto out; |
976 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
977 | goto out; | |
978 | ||
979 | memslot = &kvm->memslots[mem->slot]; | |
980 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
981 | npages = mem->memory_size >> PAGE_SHIFT; | |
982 | ||
983 | if (!npages) | |
984 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
985 | ||
6aa8b732 AK |
986 | new = old = *memslot; |
987 | ||
988 | new.base_gfn = base_gfn; | |
989 | new.npages = npages; | |
990 | new.flags = mem->flags; | |
991 | ||
992 | /* Disallow changing a memory slot's size. */ | |
993 | r = -EINVAL; | |
994 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 995 | goto out_free; |
6aa8b732 AK |
996 | |
997 | /* Check for overlaps */ | |
998 | r = -EEXIST; | |
999 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1000 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
1001 | ||
1002 | if (s == memslot) | |
1003 | continue; | |
1004 | if (!((base_gfn + npages <= s->base_gfn) || | |
1005 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 1006 | goto out_free; |
6aa8b732 | 1007 | } |
6aa8b732 | 1008 | |
6aa8b732 AK |
1009 | /* Free page dirty bitmap if unneeded */ |
1010 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 1011 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
1012 | |
1013 | r = -ENOMEM; | |
1014 | ||
1015 | /* Allocate if a slot is being created */ | |
eff0114a | 1016 | #ifndef CONFIG_S390 |
8d4e1288 | 1017 | if (npages && !new.rmap) { |
d77c26fc | 1018 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
1019 | |
1020 | if (!new.rmap) | |
f78e0e2e | 1021 | goto out_free; |
290fc38d | 1022 | |
290fc38d | 1023 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 1024 | |
80b14b5b | 1025 | new.user_alloc = user_alloc; |
604b38ac AA |
1026 | /* |
1027 | * hva_to_rmmap() serialzies with the mmu_lock and to be | |
1028 | * safe it has to ignore memslots with !user_alloc && | |
1029 | * !userspace_addr. | |
1030 | */ | |
1031 | if (user_alloc) | |
1032 | new.userspace_addr = mem->userspace_addr; | |
1033 | else | |
1034 | new.userspace_addr = 0; | |
6aa8b732 | 1035 | } |
05da4558 MT |
1036 | if (npages && !new.lpage_info) { |
1037 | int largepages = npages / KVM_PAGES_PER_HPAGE; | |
1038 | if (npages % KVM_PAGES_PER_HPAGE) | |
1039 | largepages++; | |
1040 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
1041 | largepages++; | |
1042 | ||
1043 | new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info)); | |
1044 | ||
1045 | if (!new.lpage_info) | |
1046 | goto out_free; | |
1047 | ||
1048 | memset(new.lpage_info, 0, largepages * sizeof(*new.lpage_info)); | |
1049 | ||
1050 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
1051 | new.lpage_info[0].write_count = 1; | |
1052 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE) | |
1053 | new.lpage_info[largepages-1].write_count = 1; | |
1054 | } | |
6aa8b732 AK |
1055 | |
1056 | /* Allocate page dirty bitmap if needed */ | |
1057 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
1058 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
1059 | ||
1060 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
1061 | if (!new.dirty_bitmap) | |
f78e0e2e | 1062 | goto out_free; |
6aa8b732 AK |
1063 | memset(new.dirty_bitmap, 0, dirty_bytes); |
1064 | } | |
eff0114a | 1065 | #endif /* not defined CONFIG_S390 */ |
6aa8b732 | 1066 | |
34d4cb8f MT |
1067 | if (!npages) |
1068 | kvm_arch_flush_shadow(kvm); | |
1069 | ||
604b38ac AA |
1070 | spin_lock(&kvm->mmu_lock); |
1071 | if (mem->slot >= kvm->nmemslots) | |
1072 | kvm->nmemslots = mem->slot + 1; | |
1073 | ||
3ad82a7e | 1074 | *memslot = new; |
604b38ac | 1075 | spin_unlock(&kvm->mmu_lock); |
3ad82a7e | 1076 | |
0de10343 ZX |
1077 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
1078 | if (r) { | |
604b38ac | 1079 | spin_lock(&kvm->mmu_lock); |
0de10343 | 1080 | *memslot = old; |
604b38ac | 1081 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 1082 | goto out_free; |
82ce2c96 IE |
1083 | } |
1084 | ||
6f897248 GC |
1085 | kvm_free_physmem_slot(&old, npages ? &new : NULL); |
1086 | /* Slot deletion case: we have to update the current slot */ | |
1087 | if (!npages) | |
1088 | *memslot = old; | |
8a98f664 | 1089 | #ifdef CONFIG_DMAR |
62c476c7 BAY |
1090 | /* map the pages in iommu page table */ |
1091 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); | |
1092 | if (r) | |
1093 | goto out; | |
8a98f664 | 1094 | #endif |
6aa8b732 AK |
1095 | return 0; |
1096 | ||
f78e0e2e | 1097 | out_free: |
6aa8b732 AK |
1098 | kvm_free_physmem_slot(&new, &old); |
1099 | out: | |
1100 | return r; | |
210c7c4d IE |
1101 | |
1102 | } | |
f78e0e2e SY |
1103 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
1104 | ||
1105 | int kvm_set_memory_region(struct kvm *kvm, | |
1106 | struct kvm_userspace_memory_region *mem, | |
1107 | int user_alloc) | |
1108 | { | |
1109 | int r; | |
1110 | ||
72dc67a6 | 1111 | down_write(&kvm->slots_lock); |
f78e0e2e | 1112 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
72dc67a6 | 1113 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1114 | return r; |
1115 | } | |
210c7c4d IE |
1116 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
1117 | ||
1fe779f8 CO |
1118 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
1119 | struct | |
1120 | kvm_userspace_memory_region *mem, | |
1121 | int user_alloc) | |
210c7c4d | 1122 | { |
e0d62c7f IE |
1123 | if (mem->slot >= KVM_MEMORY_SLOTS) |
1124 | return -EINVAL; | |
210c7c4d | 1125 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
1126 | } |
1127 | ||
5bb064dc ZX |
1128 | int kvm_get_dirty_log(struct kvm *kvm, |
1129 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
1130 | { |
1131 | struct kvm_memory_slot *memslot; | |
1132 | int r, i; | |
1133 | int n; | |
1134 | unsigned long any = 0; | |
1135 | ||
6aa8b732 AK |
1136 | r = -EINVAL; |
1137 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1138 | goto out; | |
1139 | ||
1140 | memslot = &kvm->memslots[log->slot]; | |
1141 | r = -ENOENT; | |
1142 | if (!memslot->dirty_bitmap) | |
1143 | goto out; | |
1144 | ||
cd1a4a98 | 1145 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 1146 | |
cd1a4a98 | 1147 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
1148 | any = memslot->dirty_bitmap[i]; |
1149 | ||
1150 | r = -EFAULT; | |
1151 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1152 | goto out; | |
1153 | ||
5bb064dc ZX |
1154 | if (any) |
1155 | *is_dirty = 1; | |
6aa8b732 AK |
1156 | |
1157 | r = 0; | |
6aa8b732 | 1158 | out: |
6aa8b732 AK |
1159 | return r; |
1160 | } | |
1161 | ||
cea7bb21 IE |
1162 | int is_error_page(struct page *page) |
1163 | { | |
1164 | return page == bad_page; | |
1165 | } | |
1166 | EXPORT_SYMBOL_GPL(is_error_page); | |
1167 | ||
35149e21 AL |
1168 | int is_error_pfn(pfn_t pfn) |
1169 | { | |
1170 | return pfn == bad_pfn; | |
1171 | } | |
1172 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
1173 | ||
f9d46eb0 IE |
1174 | static inline unsigned long bad_hva(void) |
1175 | { | |
1176 | return PAGE_OFFSET; | |
1177 | } | |
1178 | ||
1179 | int kvm_is_error_hva(unsigned long addr) | |
1180 | { | |
1181 | return addr == bad_hva(); | |
1182 | } | |
1183 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
1184 | ||
2843099f | 1185 | struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) |
6aa8b732 AK |
1186 | { |
1187 | int i; | |
1188 | ||
1189 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1190 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1191 | ||
1192 | if (gfn >= memslot->base_gfn | |
1193 | && gfn < memslot->base_gfn + memslot->npages) | |
1194 | return memslot; | |
1195 | } | |
8b6d44c7 | 1196 | return NULL; |
6aa8b732 | 1197 | } |
2843099f | 1198 | EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); |
e8207547 AK |
1199 | |
1200 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1201 | { | |
1202 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1203 | return gfn_to_memslot_unaliased(kvm, gfn); |
e8207547 | 1204 | } |
6aa8b732 | 1205 | |
e0d62c7f IE |
1206 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
1207 | { | |
1208 | int i; | |
1209 | ||
1210 | gfn = unalias_gfn(kvm, gfn); | |
1211 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1212 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1213 | ||
1214 | if (gfn >= memslot->base_gfn | |
1215 | && gfn < memslot->base_gfn + memslot->npages) | |
1216 | return 1; | |
1217 | } | |
1218 | return 0; | |
1219 | } | |
1220 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
1221 | ||
05da4558 | 1222 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
539cb660 IE |
1223 | { |
1224 | struct kvm_memory_slot *slot; | |
1225 | ||
1226 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1227 | slot = gfn_to_memslot_unaliased(kvm, gfn); |
539cb660 IE |
1228 | if (!slot) |
1229 | return bad_hva(); | |
1230 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
1231 | } | |
0d150298 | 1232 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 1233 | |
35149e21 | 1234 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
954bbbc2 | 1235 | { |
8d4e1288 | 1236 | struct page *page[1]; |
539cb660 | 1237 | unsigned long addr; |
8d4e1288 | 1238 | int npages; |
2e2e3738 | 1239 | pfn_t pfn; |
954bbbc2 | 1240 | |
60395224 AK |
1241 | might_sleep(); |
1242 | ||
539cb660 IE |
1243 | addr = gfn_to_hva(kvm, gfn); |
1244 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 1245 | get_page(bad_page); |
35149e21 | 1246 | return page_to_pfn(bad_page); |
8a7ae055 | 1247 | } |
8d4e1288 | 1248 | |
4c2155ce | 1249 | npages = get_user_pages_fast(addr, 1, 1, page); |
539cb660 | 1250 | |
2e2e3738 AL |
1251 | if (unlikely(npages != 1)) { |
1252 | struct vm_area_struct *vma; | |
1253 | ||
4c2155ce | 1254 | down_read(¤t->mm->mmap_sem); |
2e2e3738 | 1255 | vma = find_vma(current->mm, addr); |
4c2155ce | 1256 | |
2e2e3738 AL |
1257 | if (vma == NULL || addr < vma->vm_start || |
1258 | !(vma->vm_flags & VM_PFNMAP)) { | |
4c2155ce | 1259 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
1260 | get_page(bad_page); |
1261 | return page_to_pfn(bad_page); | |
1262 | } | |
1263 | ||
1264 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
4c2155ce | 1265 | up_read(¤t->mm->mmap_sem); |
c77fb9dc | 1266 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1267 | } else |
1268 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1269 | |
2e2e3738 | 1270 | return pfn; |
35149e21 AL |
1271 | } |
1272 | ||
1273 | EXPORT_SYMBOL_GPL(gfn_to_pfn); | |
1274 | ||
1275 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
1276 | { | |
2e2e3738 AL |
1277 | pfn_t pfn; |
1278 | ||
1279 | pfn = gfn_to_pfn(kvm, gfn); | |
c77fb9dc | 1280 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 AL |
1281 | return pfn_to_page(pfn); |
1282 | ||
c77fb9dc | 1283 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1284 | |
1285 | get_page(bad_page); | |
1286 | return bad_page; | |
954bbbc2 | 1287 | } |
aab61cc0 | 1288 | |
954bbbc2 AK |
1289 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1290 | ||
b4231d61 IE |
1291 | void kvm_release_page_clean(struct page *page) |
1292 | { | |
35149e21 | 1293 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1294 | } |
1295 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1296 | ||
35149e21 AL |
1297 | void kvm_release_pfn_clean(pfn_t pfn) |
1298 | { | |
c77fb9dc | 1299 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1300 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1301 | } |
1302 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1303 | ||
b4231d61 | 1304 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1305 | { |
35149e21 AL |
1306 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1307 | } | |
1308 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1309 | ||
1310 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1311 | { | |
1312 | kvm_set_pfn_dirty(pfn); | |
1313 | kvm_release_pfn_clean(pfn); | |
1314 | } | |
1315 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1316 | ||
1317 | void kvm_set_page_dirty(struct page *page) | |
1318 | { | |
1319 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1320 | } | |
1321 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1322 | ||
1323 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1324 | { | |
c77fb9dc | 1325 | if (!kvm_is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1326 | struct page *page = pfn_to_page(pfn); |
1327 | if (!PageReserved(page)) | |
1328 | SetPageDirty(page); | |
1329 | } | |
8a7ae055 | 1330 | } |
35149e21 AL |
1331 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1332 | ||
1333 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1334 | { | |
c77fb9dc | 1335 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1336 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1337 | } |
1338 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1339 | ||
1340 | void kvm_get_pfn(pfn_t pfn) | |
1341 | { | |
c77fb9dc | 1342 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1343 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1344 | } |
1345 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1346 | |
195aefde IE |
1347 | static int next_segment(unsigned long len, int offset) |
1348 | { | |
1349 | if (len > PAGE_SIZE - offset) | |
1350 | return PAGE_SIZE - offset; | |
1351 | else | |
1352 | return len; | |
1353 | } | |
1354 | ||
1355 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1356 | int len) | |
1357 | { | |
e0506bcb IE |
1358 | int r; |
1359 | unsigned long addr; | |
195aefde | 1360 | |
e0506bcb IE |
1361 | addr = gfn_to_hva(kvm, gfn); |
1362 | if (kvm_is_error_hva(addr)) | |
1363 | return -EFAULT; | |
1364 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
1365 | if (r) | |
195aefde | 1366 | return -EFAULT; |
195aefde IE |
1367 | return 0; |
1368 | } | |
1369 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1370 | ||
1371 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1372 | { | |
1373 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1374 | int seg; | |
1375 | int offset = offset_in_page(gpa); | |
1376 | int ret; | |
1377 | ||
1378 | while ((seg = next_segment(len, offset)) != 0) { | |
1379 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1380 | if (ret < 0) | |
1381 | return ret; | |
1382 | offset = 0; | |
1383 | len -= seg; | |
1384 | data += seg; | |
1385 | ++gfn; | |
1386 | } | |
1387 | return 0; | |
1388 | } | |
1389 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1390 | ||
7ec54588 MT |
1391 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1392 | unsigned long len) | |
1393 | { | |
1394 | int r; | |
1395 | unsigned long addr; | |
1396 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1397 | int offset = offset_in_page(gpa); | |
1398 | ||
1399 | addr = gfn_to_hva(kvm, gfn); | |
1400 | if (kvm_is_error_hva(addr)) | |
1401 | return -EFAULT; | |
0aac03f0 | 1402 | pagefault_disable(); |
7ec54588 | 1403 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1404 | pagefault_enable(); |
7ec54588 MT |
1405 | if (r) |
1406 | return -EFAULT; | |
1407 | return 0; | |
1408 | } | |
1409 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1410 | ||
195aefde IE |
1411 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1412 | int offset, int len) | |
1413 | { | |
e0506bcb IE |
1414 | int r; |
1415 | unsigned long addr; | |
195aefde | 1416 | |
e0506bcb IE |
1417 | addr = gfn_to_hva(kvm, gfn); |
1418 | if (kvm_is_error_hva(addr)) | |
1419 | return -EFAULT; | |
1420 | r = copy_to_user((void __user *)addr + offset, data, len); | |
1421 | if (r) | |
195aefde | 1422 | return -EFAULT; |
195aefde IE |
1423 | mark_page_dirty(kvm, gfn); |
1424 | return 0; | |
1425 | } | |
1426 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1427 | ||
1428 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1429 | unsigned long len) | |
1430 | { | |
1431 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1432 | int seg; | |
1433 | int offset = offset_in_page(gpa); | |
1434 | int ret; | |
1435 | ||
1436 | while ((seg = next_segment(len, offset)) != 0) { | |
1437 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1438 | if (ret < 0) | |
1439 | return ret; | |
1440 | offset = 0; | |
1441 | len -= seg; | |
1442 | data += seg; | |
1443 | ++gfn; | |
1444 | } | |
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1449 | { | |
3e021bf5 | 1450 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
195aefde IE |
1451 | } |
1452 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1453 | ||
1454 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1455 | { | |
1456 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1457 | int seg; | |
1458 | int offset = offset_in_page(gpa); | |
1459 | int ret; | |
1460 | ||
1461 | while ((seg = next_segment(len, offset)) != 0) { | |
1462 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1463 | if (ret < 0) | |
1464 | return ret; | |
1465 | offset = 0; | |
1466 | len -= seg; | |
1467 | ++gfn; | |
1468 | } | |
1469 | return 0; | |
1470 | } | |
1471 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1472 | ||
6aa8b732 AK |
1473 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1474 | { | |
31389947 | 1475 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1476 | |
3b6fff19 | 1477 | gfn = unalias_gfn(kvm, gfn); |
2843099f | 1478 | memslot = gfn_to_memslot_unaliased(kvm, gfn); |
7e9d619d RR |
1479 | if (memslot && memslot->dirty_bitmap) { |
1480 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1481 | |
7e9d619d RR |
1482 | /* avoid RMW */ |
1483 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1484 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1485 | } |
1486 | } | |
1487 | ||
b6958ce4 ED |
1488 | /* |
1489 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1490 | */ | |
8776e519 | 1491 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1492 | { |
e5c239cf MT |
1493 | DEFINE_WAIT(wait); |
1494 | ||
1495 | for (;;) { | |
1496 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1497 | ||
d7690175 MT |
1498 | if (kvm_cpu_has_interrupt(vcpu) || |
1499 | kvm_cpu_has_pending_timer(vcpu) || | |
1500 | kvm_arch_vcpu_runnable(vcpu)) { | |
1501 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
e5c239cf | 1502 | break; |
d7690175 | 1503 | } |
e5c239cf MT |
1504 | if (signal_pending(current)) |
1505 | break; | |
1506 | ||
b6958ce4 ED |
1507 | vcpu_put(vcpu); |
1508 | schedule(); | |
1509 | vcpu_load(vcpu); | |
1510 | } | |
d3bef15f | 1511 | |
e5c239cf | 1512 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1513 | } |
1514 | ||
6aa8b732 AK |
1515 | void kvm_resched(struct kvm_vcpu *vcpu) |
1516 | { | |
3fca0365 YD |
1517 | if (!need_resched()) |
1518 | return; | |
6aa8b732 | 1519 | cond_resched(); |
6aa8b732 AK |
1520 | } |
1521 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1522 | ||
e4a533a4 | 1523 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
9a2bb7f4 AK |
1524 | { |
1525 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
9a2bb7f4 AK |
1526 | struct page *page; |
1527 | ||
e4a533a4 | 1528 | if (vmf->pgoff == 0) |
039576c0 | 1529 | page = virt_to_page(vcpu->run); |
09566765 | 1530 | #ifdef CONFIG_X86 |
e4a533a4 | 1531 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
ad312c7c | 1532 | page = virt_to_page(vcpu->arch.pio_data); |
5f94c174 LV |
1533 | #endif |
1534 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1535 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) | |
1536 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); | |
09566765 | 1537 | #endif |
039576c0 | 1538 | else |
e4a533a4 | 1539 | return VM_FAULT_SIGBUS; |
9a2bb7f4 | 1540 | get_page(page); |
e4a533a4 | 1541 | vmf->page = page; |
1542 | return 0; | |
9a2bb7f4 AK |
1543 | } |
1544 | ||
1545 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
e4a533a4 | 1546 | .fault = kvm_vcpu_fault, |
9a2bb7f4 AK |
1547 | }; |
1548 | ||
1549 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
1550 | { | |
1551 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
1552 | return 0; | |
1553 | } | |
1554 | ||
bccf2150 AK |
1555 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1556 | { | |
1557 | struct kvm_vcpu *vcpu = filp->private_data; | |
1558 | ||
66c0b394 | 1559 | kvm_put_kvm(vcpu->kvm); |
bccf2150 AK |
1560 | return 0; |
1561 | } | |
1562 | ||
3d3aab1b | 1563 | static struct file_operations kvm_vcpu_fops = { |
bccf2150 AK |
1564 | .release = kvm_vcpu_release, |
1565 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1566 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 1567 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
1568 | }; |
1569 | ||
1570 | /* | |
1571 | * Allocates an inode for the vcpu. | |
1572 | */ | |
1573 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1574 | { | |
7d9dbca3 | 1575 | int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
2030a42c | 1576 | if (fd < 0) |
66c0b394 | 1577 | kvm_put_kvm(vcpu->kvm); |
bccf2150 | 1578 | return fd; |
bccf2150 AK |
1579 | } |
1580 | ||
c5ea7660 AK |
1581 | /* |
1582 | * Creates some virtual cpus. Good luck creating more than one. | |
1583 | */ | |
1584 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
1585 | { | |
1586 | int r; | |
1587 | struct kvm_vcpu *vcpu; | |
1588 | ||
c5ea7660 | 1589 | if (!valid_vcpu(n)) |
fb3f0f51 | 1590 | return -EINVAL; |
c5ea7660 | 1591 | |
e9b11c17 | 1592 | vcpu = kvm_arch_vcpu_create(kvm, n); |
fb3f0f51 RR |
1593 | if (IS_ERR(vcpu)) |
1594 | return PTR_ERR(vcpu); | |
c5ea7660 | 1595 | |
15ad7146 AK |
1596 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1597 | ||
26e5215f AK |
1598 | r = kvm_arch_vcpu_setup(vcpu); |
1599 | if (r) | |
7d8fece6 | 1600 | return r; |
26e5215f | 1601 | |
11ec2804 | 1602 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
1603 | if (kvm->vcpus[n]) { |
1604 | r = -EEXIST; | |
e9b11c17 | 1605 | goto vcpu_destroy; |
fb3f0f51 RR |
1606 | } |
1607 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 1608 | mutex_unlock(&kvm->lock); |
c5ea7660 | 1609 | |
fb3f0f51 | 1610 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1611 | kvm_get_kvm(kvm); |
bccf2150 AK |
1612 | r = create_vcpu_fd(vcpu); |
1613 | if (r < 0) | |
fb3f0f51 RR |
1614 | goto unlink; |
1615 | return r; | |
39c3b86e | 1616 | |
fb3f0f51 | 1617 | unlink: |
11ec2804 | 1618 | mutex_lock(&kvm->lock); |
fb3f0f51 | 1619 | kvm->vcpus[n] = NULL; |
e9b11c17 | 1620 | vcpu_destroy: |
7d8fece6 | 1621 | mutex_unlock(&kvm->lock); |
d40ccc62 | 1622 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1623 | return r; |
1624 | } | |
1625 | ||
1961d276 AK |
1626 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1627 | { | |
1628 | if (sigset) { | |
1629 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1630 | vcpu->sigset_active = 1; | |
1631 | vcpu->sigset = *sigset; | |
1632 | } else | |
1633 | vcpu->sigset_active = 0; | |
1634 | return 0; | |
1635 | } | |
1636 | ||
bccf2150 AK |
1637 | static long kvm_vcpu_ioctl(struct file *filp, |
1638 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1639 | { |
bccf2150 | 1640 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1641 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1642 | int r; |
fa3795a7 DH |
1643 | struct kvm_fpu *fpu = NULL; |
1644 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1645 | |
6d4e4c4f AK |
1646 | if (vcpu->kvm->mm != current->mm) |
1647 | return -EIO; | |
6aa8b732 | 1648 | switch (ioctl) { |
9a2bb7f4 | 1649 | case KVM_RUN: |
f0fe5108 AK |
1650 | r = -EINVAL; |
1651 | if (arg) | |
1652 | goto out; | |
b6c7a5dc | 1653 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 1654 | break; |
6aa8b732 | 1655 | case KVM_GET_REGS: { |
3e4bb3ac | 1656 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1657 | |
3e4bb3ac XZ |
1658 | r = -ENOMEM; |
1659 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1660 | if (!kvm_regs) | |
6aa8b732 | 1661 | goto out; |
3e4bb3ac XZ |
1662 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1663 | if (r) | |
1664 | goto out_free1; | |
6aa8b732 | 1665 | r = -EFAULT; |
3e4bb3ac XZ |
1666 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1667 | goto out_free1; | |
6aa8b732 | 1668 | r = 0; |
3e4bb3ac XZ |
1669 | out_free1: |
1670 | kfree(kvm_regs); | |
6aa8b732 AK |
1671 | break; |
1672 | } | |
1673 | case KVM_SET_REGS: { | |
3e4bb3ac | 1674 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1675 | |
3e4bb3ac XZ |
1676 | r = -ENOMEM; |
1677 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1678 | if (!kvm_regs) | |
6aa8b732 | 1679 | goto out; |
3e4bb3ac XZ |
1680 | r = -EFAULT; |
1681 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) | |
1682 | goto out_free2; | |
1683 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); | |
6aa8b732 | 1684 | if (r) |
3e4bb3ac | 1685 | goto out_free2; |
6aa8b732 | 1686 | r = 0; |
3e4bb3ac XZ |
1687 | out_free2: |
1688 | kfree(kvm_regs); | |
6aa8b732 AK |
1689 | break; |
1690 | } | |
1691 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1692 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1693 | r = -ENOMEM; | |
1694 | if (!kvm_sregs) | |
1695 | goto out; | |
1696 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1697 | if (r) |
1698 | goto out; | |
1699 | r = -EFAULT; | |
fa3795a7 | 1700 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1701 | goto out; |
1702 | r = 0; | |
1703 | break; | |
1704 | } | |
1705 | case KVM_SET_SREGS: { | |
fa3795a7 DH |
1706 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1707 | r = -ENOMEM; | |
1708 | if (!kvm_sregs) | |
1709 | goto out; | |
6aa8b732 | 1710 | r = -EFAULT; |
fa3795a7 | 1711 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
6aa8b732 | 1712 | goto out; |
fa3795a7 | 1713 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1714 | if (r) |
1715 | goto out; | |
1716 | r = 0; | |
1717 | break; | |
1718 | } | |
62d9f0db MT |
1719 | case KVM_GET_MP_STATE: { |
1720 | struct kvm_mp_state mp_state; | |
1721 | ||
1722 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
1723 | if (r) | |
1724 | goto out; | |
1725 | r = -EFAULT; | |
1726 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
1727 | goto out; | |
1728 | r = 0; | |
1729 | break; | |
1730 | } | |
1731 | case KVM_SET_MP_STATE: { | |
1732 | struct kvm_mp_state mp_state; | |
1733 | ||
1734 | r = -EFAULT; | |
1735 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
1736 | goto out; | |
1737 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
1738 | if (r) | |
1739 | goto out; | |
1740 | r = 0; | |
1741 | break; | |
1742 | } | |
6aa8b732 AK |
1743 | case KVM_TRANSLATE: { |
1744 | struct kvm_translation tr; | |
1745 | ||
1746 | r = -EFAULT; | |
2f366987 | 1747 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 1748 | goto out; |
8b006791 | 1749 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
1750 | if (r) |
1751 | goto out; | |
1752 | r = -EFAULT; | |
2f366987 | 1753 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
1754 | goto out; |
1755 | r = 0; | |
1756 | break; | |
1757 | } | |
6aa8b732 AK |
1758 | case KVM_DEBUG_GUEST: { |
1759 | struct kvm_debug_guest dbg; | |
1760 | ||
1761 | r = -EFAULT; | |
2f366987 | 1762 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 1763 | goto out; |
b6c7a5dc | 1764 | r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
1765 | if (r) |
1766 | goto out; | |
1767 | r = 0; | |
1768 | break; | |
1769 | } | |
1961d276 AK |
1770 | case KVM_SET_SIGNAL_MASK: { |
1771 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
1772 | struct kvm_signal_mask kvm_sigmask; | |
1773 | sigset_t sigset, *p; | |
1774 | ||
1775 | p = NULL; | |
1776 | if (argp) { | |
1777 | r = -EFAULT; | |
1778 | if (copy_from_user(&kvm_sigmask, argp, | |
1779 | sizeof kvm_sigmask)) | |
1780 | goto out; | |
1781 | r = -EINVAL; | |
1782 | if (kvm_sigmask.len != sizeof sigset) | |
1783 | goto out; | |
1784 | r = -EFAULT; | |
1785 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
1786 | sizeof sigset)) | |
1787 | goto out; | |
1788 | p = &sigset; | |
1789 | } | |
1790 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
1791 | break; | |
1792 | } | |
b8836737 | 1793 | case KVM_GET_FPU: { |
fa3795a7 DH |
1794 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1795 | r = -ENOMEM; | |
1796 | if (!fpu) | |
1797 | goto out; | |
1798 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
1799 | if (r) |
1800 | goto out; | |
1801 | r = -EFAULT; | |
fa3795a7 | 1802 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
1803 | goto out; |
1804 | r = 0; | |
1805 | break; | |
1806 | } | |
1807 | case KVM_SET_FPU: { | |
fa3795a7 DH |
1808 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1809 | r = -ENOMEM; | |
1810 | if (!fpu) | |
1811 | goto out; | |
b8836737 | 1812 | r = -EFAULT; |
fa3795a7 | 1813 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
b8836737 | 1814 | goto out; |
fa3795a7 | 1815 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
1816 | if (r) |
1817 | goto out; | |
1818 | r = 0; | |
1819 | break; | |
1820 | } | |
bccf2150 | 1821 | default: |
313a3dc7 | 1822 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
1823 | } |
1824 | out: | |
fa3795a7 DH |
1825 | kfree(fpu); |
1826 | kfree(kvm_sregs); | |
bccf2150 AK |
1827 | return r; |
1828 | } | |
1829 | ||
1830 | static long kvm_vm_ioctl(struct file *filp, | |
1831 | unsigned int ioctl, unsigned long arg) | |
1832 | { | |
1833 | struct kvm *kvm = filp->private_data; | |
1834 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 1835 | int r; |
bccf2150 | 1836 | |
6d4e4c4f AK |
1837 | if (kvm->mm != current->mm) |
1838 | return -EIO; | |
bccf2150 AK |
1839 | switch (ioctl) { |
1840 | case KVM_CREATE_VCPU: | |
1841 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
1842 | if (r < 0) | |
1843 | goto out; | |
1844 | break; | |
6fc138d2 IE |
1845 | case KVM_SET_USER_MEMORY_REGION: { |
1846 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1847 | ||
1848 | r = -EFAULT; | |
1849 | if (copy_from_user(&kvm_userspace_mem, argp, | |
1850 | sizeof kvm_userspace_mem)) | |
1851 | goto out; | |
1852 | ||
1853 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
1854 | if (r) |
1855 | goto out; | |
1856 | break; | |
1857 | } | |
1858 | case KVM_GET_DIRTY_LOG: { | |
1859 | struct kvm_dirty_log log; | |
1860 | ||
1861 | r = -EFAULT; | |
2f366987 | 1862 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 1863 | goto out; |
2c6f5df9 | 1864 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
1865 | if (r) |
1866 | goto out; | |
1867 | break; | |
1868 | } | |
5f94c174 LV |
1869 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1870 | case KVM_REGISTER_COALESCED_MMIO: { | |
1871 | struct kvm_coalesced_mmio_zone zone; | |
1872 | r = -EFAULT; | |
1873 | if (copy_from_user(&zone, argp, sizeof zone)) | |
1874 | goto out; | |
1875 | r = -ENXIO; | |
1876 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); | |
1877 | if (r) | |
1878 | goto out; | |
1879 | r = 0; | |
1880 | break; | |
1881 | } | |
1882 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
1883 | struct kvm_coalesced_mmio_zone zone; | |
1884 | r = -EFAULT; | |
1885 | if (copy_from_user(&zone, argp, sizeof zone)) | |
1886 | goto out; | |
1887 | r = -ENXIO; | |
1888 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); | |
1889 | if (r) | |
1890 | goto out; | |
1891 | r = 0; | |
1892 | break; | |
1893 | } | |
8a98f664 XZ |
1894 | #endif |
1895 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT | |
1896 | case KVM_ASSIGN_PCI_DEVICE: { | |
1897 | struct kvm_assigned_pci_dev assigned_dev; | |
1898 | ||
1899 | r = -EFAULT; | |
1900 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
1901 | goto out; | |
1902 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); | |
1903 | if (r) | |
1904 | goto out; | |
1905 | break; | |
1906 | } | |
1907 | case KVM_ASSIGN_IRQ: { | |
1908 | struct kvm_assigned_irq assigned_irq; | |
1909 | ||
1910 | r = -EFAULT; | |
1911 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
1912 | goto out; | |
1913 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); | |
1914 | if (r) | |
1915 | goto out; | |
1916 | break; | |
1917 | } | |
0a920356 WH |
1918 | #endif |
1919 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT | |
1920 | case KVM_DEASSIGN_PCI_DEVICE: { | |
1921 | struct kvm_assigned_pci_dev assigned_dev; | |
1922 | ||
1923 | r = -EFAULT; | |
1924 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
1925 | goto out; | |
1926 | r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev); | |
1927 | if (r) | |
1928 | goto out; | |
1929 | break; | |
1930 | } | |
5f94c174 | 1931 | #endif |
f17abe9a | 1932 | default: |
1fe779f8 | 1933 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
1934 | } |
1935 | out: | |
1936 | return r; | |
1937 | } | |
1938 | ||
e4a533a4 | 1939 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 1940 | { |
777b3f49 MT |
1941 | struct page *page[1]; |
1942 | unsigned long addr; | |
1943 | int npages; | |
1944 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 1945 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 1946 | |
777b3f49 MT |
1947 | addr = gfn_to_hva(kvm, gfn); |
1948 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 1949 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
1950 | |
1951 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
1952 | NULL); | |
1953 | if (unlikely(npages != 1)) | |
e4a533a4 | 1954 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
1955 | |
1956 | vmf->page = page[0]; | |
e4a533a4 | 1957 | return 0; |
f17abe9a AK |
1958 | } |
1959 | ||
1960 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
e4a533a4 | 1961 | .fault = kvm_vm_fault, |
f17abe9a AK |
1962 | }; |
1963 | ||
1964 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
1965 | { | |
1966 | vma->vm_ops = &kvm_vm_vm_ops; | |
1967 | return 0; | |
1968 | } | |
1969 | ||
3d3aab1b | 1970 | static struct file_operations kvm_vm_fops = { |
f17abe9a AK |
1971 | .release = kvm_vm_release, |
1972 | .unlocked_ioctl = kvm_vm_ioctl, | |
1973 | .compat_ioctl = kvm_vm_ioctl, | |
1974 | .mmap = kvm_vm_mmap, | |
1975 | }; | |
1976 | ||
1977 | static int kvm_dev_ioctl_create_vm(void) | |
1978 | { | |
2030a42c | 1979 | int fd; |
f17abe9a AK |
1980 | struct kvm *kvm; |
1981 | ||
f17abe9a | 1982 | kvm = kvm_create_vm(); |
d6d28168 AK |
1983 | if (IS_ERR(kvm)) |
1984 | return PTR_ERR(kvm); | |
7d9dbca3 | 1985 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
2030a42c | 1986 | if (fd < 0) |
66c0b394 | 1987 | kvm_put_kvm(kvm); |
f17abe9a | 1988 | |
f17abe9a | 1989 | return fd; |
f17abe9a AK |
1990 | } |
1991 | ||
1a811b61 AK |
1992 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
1993 | { | |
1994 | switch (arg) { | |
ca9edaee | 1995 | case KVM_CAP_USER_MEMORY: |
1a811b61 AK |
1996 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
1997 | return 1; | |
1998 | default: | |
1999 | break; | |
2000 | } | |
2001 | return kvm_dev_ioctl_check_extension(arg); | |
2002 | } | |
2003 | ||
f17abe9a AK |
2004 | static long kvm_dev_ioctl(struct file *filp, |
2005 | unsigned int ioctl, unsigned long arg) | |
2006 | { | |
07c45a36 | 2007 | long r = -EINVAL; |
f17abe9a AK |
2008 | |
2009 | switch (ioctl) { | |
2010 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2011 | r = -EINVAL; |
2012 | if (arg) | |
2013 | goto out; | |
f17abe9a AK |
2014 | r = KVM_API_VERSION; |
2015 | break; | |
2016 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2017 | r = -EINVAL; |
2018 | if (arg) | |
2019 | goto out; | |
f17abe9a AK |
2020 | r = kvm_dev_ioctl_create_vm(); |
2021 | break; | |
018d00d2 | 2022 | case KVM_CHECK_EXTENSION: |
1a811b61 | 2023 | r = kvm_dev_ioctl_check_extension_generic(arg); |
5d308f45 | 2024 | break; |
07c45a36 AK |
2025 | case KVM_GET_VCPU_MMAP_SIZE: |
2026 | r = -EINVAL; | |
2027 | if (arg) | |
2028 | goto out; | |
adb1ff46 AK |
2029 | r = PAGE_SIZE; /* struct kvm_run */ |
2030 | #ifdef CONFIG_X86 | |
2031 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
2032 | #endif |
2033 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
2034 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 2035 | #endif |
07c45a36 | 2036 | break; |
d4c9ff2d FEL |
2037 | case KVM_TRACE_ENABLE: |
2038 | case KVM_TRACE_PAUSE: | |
2039 | case KVM_TRACE_DISABLE: | |
2040 | r = kvm_trace_ioctl(ioctl, arg); | |
2041 | break; | |
6aa8b732 | 2042 | default: |
043405e1 | 2043 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
2044 | } |
2045 | out: | |
2046 | return r; | |
2047 | } | |
2048 | ||
6aa8b732 | 2049 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
2050 | .unlocked_ioctl = kvm_dev_ioctl, |
2051 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2052 | }; |
2053 | ||
2054 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2055 | KVM_MINOR, |
6aa8b732 AK |
2056 | "kvm", |
2057 | &kvm_chardev_ops, | |
2058 | }; | |
2059 | ||
1b6c0168 AK |
2060 | static void hardware_enable(void *junk) |
2061 | { | |
2062 | int cpu = raw_smp_processor_id(); | |
2063 | ||
7f59f492 | 2064 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2065 | return; |
7f59f492 | 2066 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2067 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
2068 | } |
2069 | ||
2070 | static void hardware_disable(void *junk) | |
2071 | { | |
2072 | int cpu = raw_smp_processor_id(); | |
2073 | ||
7f59f492 | 2074 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2075 | return; |
7f59f492 | 2076 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2077 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
2078 | } |
2079 | ||
774c47f1 AK |
2080 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2081 | void *v) | |
2082 | { | |
2083 | int cpu = (long)v; | |
2084 | ||
1a6f4d7f | 2085 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 2086 | switch (val) { |
cec9ad27 | 2087 | case CPU_DYING: |
6ec8a856 AK |
2088 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2089 | cpu); | |
2090 | hardware_disable(NULL); | |
2091 | break; | |
774c47f1 | 2092 | case CPU_UP_CANCELED: |
43934a38 JK |
2093 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2094 | cpu); | |
8691e5a8 | 2095 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
774c47f1 | 2096 | break; |
43934a38 JK |
2097 | case CPU_ONLINE: |
2098 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2099 | cpu); | |
8691e5a8 | 2100 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
774c47f1 AK |
2101 | break; |
2102 | } | |
2103 | return NOTIFY_OK; | |
2104 | } | |
2105 | ||
4ecac3fd AK |
2106 | |
2107 | asmlinkage void kvm_handle_fault_on_reboot(void) | |
2108 | { | |
2109 | if (kvm_rebooting) | |
2110 | /* spin while reset goes on */ | |
2111 | while (true) | |
2112 | ; | |
2113 | /* Fault while not rebooting. We want the trace. */ | |
2114 | BUG(); | |
2115 | } | |
2116 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); | |
2117 | ||
9a2b85c6 | 2118 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 2119 | void *v) |
9a2b85c6 RR |
2120 | { |
2121 | if (val == SYS_RESTART) { | |
2122 | /* | |
2123 | * Some (well, at least mine) BIOSes hang on reboot if | |
2124 | * in vmx root mode. | |
2125 | */ | |
2126 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
4ecac3fd | 2127 | kvm_rebooting = true; |
15c8b6c1 | 2128 | on_each_cpu(hardware_disable, NULL, 1); |
9a2b85c6 RR |
2129 | } |
2130 | return NOTIFY_OK; | |
2131 | } | |
2132 | ||
2133 | static struct notifier_block kvm_reboot_notifier = { | |
2134 | .notifier_call = kvm_reboot, | |
2135 | .priority = 0, | |
2136 | }; | |
2137 | ||
2eeb2e94 GH |
2138 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
2139 | { | |
2140 | memset(bus, 0, sizeof(*bus)); | |
2141 | } | |
2142 | ||
2143 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
2144 | { | |
2145 | int i; | |
2146 | ||
2147 | for (i = 0; i < bus->dev_count; i++) { | |
2148 | struct kvm_io_device *pos = bus->devs[i]; | |
2149 | ||
2150 | kvm_iodevice_destructor(pos); | |
2151 | } | |
2152 | } | |
2153 | ||
92760499 LV |
2154 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, |
2155 | gpa_t addr, int len, int is_write) | |
2eeb2e94 GH |
2156 | { |
2157 | int i; | |
2158 | ||
2159 | for (i = 0; i < bus->dev_count; i++) { | |
2160 | struct kvm_io_device *pos = bus->devs[i]; | |
2161 | ||
92760499 | 2162 | if (pos->in_range(pos, addr, len, is_write)) |
2eeb2e94 GH |
2163 | return pos; |
2164 | } | |
2165 | ||
2166 | return NULL; | |
2167 | } | |
2168 | ||
2169 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
2170 | { | |
2171 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
2172 | ||
2173 | bus->devs[bus->dev_count++] = dev; | |
2174 | } | |
2175 | ||
774c47f1 AK |
2176 | static struct notifier_block kvm_cpu_notifier = { |
2177 | .notifier_call = kvm_cpu_hotplug, | |
2178 | .priority = 20, /* must be > scheduler priority */ | |
2179 | }; | |
2180 | ||
8b88b099 | 2181 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
2182 | { |
2183 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
2184 | struct kvm *kvm; |
2185 | ||
8b88b099 | 2186 | *val = 0; |
ba1389b7 AK |
2187 | spin_lock(&kvm_lock); |
2188 | list_for_each_entry(kvm, &vm_list, vm_list) | |
8b88b099 | 2189 | *val += *(u32 *)((void *)kvm + offset); |
ba1389b7 | 2190 | spin_unlock(&kvm_lock); |
8b88b099 | 2191 | return 0; |
ba1389b7 AK |
2192 | } |
2193 | ||
2194 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
2195 | ||
8b88b099 | 2196 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
2197 | { |
2198 | unsigned offset = (long)_offset; | |
1165f5fe AK |
2199 | struct kvm *kvm; |
2200 | struct kvm_vcpu *vcpu; | |
2201 | int i; | |
2202 | ||
8b88b099 | 2203 | *val = 0; |
1165f5fe AK |
2204 | spin_lock(&kvm_lock); |
2205 | list_for_each_entry(kvm, &vm_list, vm_list) | |
2206 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
2207 | vcpu = kvm->vcpus[i]; |
2208 | if (vcpu) | |
8b88b099 | 2209 | *val += *(u32 *)((void *)vcpu + offset); |
1165f5fe AK |
2210 | } |
2211 | spin_unlock(&kvm_lock); | |
8b88b099 | 2212 | return 0; |
1165f5fe AK |
2213 | } |
2214 | ||
ba1389b7 AK |
2215 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
2216 | ||
2217 | static struct file_operations *stat_fops[] = { | |
2218 | [KVM_STAT_VCPU] = &vcpu_stat_fops, | |
2219 | [KVM_STAT_VM] = &vm_stat_fops, | |
2220 | }; | |
1165f5fe | 2221 | |
a16b043c | 2222 | static void kvm_init_debug(void) |
6aa8b732 AK |
2223 | { |
2224 | struct kvm_stats_debugfs_item *p; | |
2225 | ||
76f7c879 | 2226 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 2227 | for (p = debugfs_entries; p->name; ++p) |
76f7c879 | 2228 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 2229 | (void *)(long)p->offset, |
ba1389b7 | 2230 | stat_fops[p->kind]); |
6aa8b732 AK |
2231 | } |
2232 | ||
2233 | static void kvm_exit_debug(void) | |
2234 | { | |
2235 | struct kvm_stats_debugfs_item *p; | |
2236 | ||
2237 | for (p = debugfs_entries; p->name; ++p) | |
2238 | debugfs_remove(p->dentry); | |
76f7c879 | 2239 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
2240 | } |
2241 | ||
59ae6c6b AK |
2242 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2243 | { | |
4267c41a | 2244 | hardware_disable(NULL); |
59ae6c6b AK |
2245 | return 0; |
2246 | } | |
2247 | ||
2248 | static int kvm_resume(struct sys_device *dev) | |
2249 | { | |
4267c41a | 2250 | hardware_enable(NULL); |
59ae6c6b AK |
2251 | return 0; |
2252 | } | |
2253 | ||
2254 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 2255 | .name = "kvm", |
59ae6c6b AK |
2256 | .suspend = kvm_suspend, |
2257 | .resume = kvm_resume, | |
2258 | }; | |
2259 | ||
2260 | static struct sys_device kvm_sysdev = { | |
2261 | .id = 0, | |
2262 | .cls = &kvm_sysdev_class, | |
2263 | }; | |
2264 | ||
cea7bb21 | 2265 | struct page *bad_page; |
35149e21 | 2266 | pfn_t bad_pfn; |
6aa8b732 | 2267 | |
15ad7146 AK |
2268 | static inline |
2269 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
2270 | { | |
2271 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
2272 | } | |
2273 | ||
2274 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
2275 | { | |
2276 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2277 | ||
e9b11c17 | 2278 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
2279 | } |
2280 | ||
2281 | static void kvm_sched_out(struct preempt_notifier *pn, | |
2282 | struct task_struct *next) | |
2283 | { | |
2284 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2285 | ||
e9b11c17 | 2286 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
2287 | } |
2288 | ||
f8c16bba | 2289 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 2290 | struct module *module) |
6aa8b732 AK |
2291 | { |
2292 | int r; | |
002c7f7c | 2293 | int cpu; |
6aa8b732 | 2294 | |
cb498ea2 ZX |
2295 | kvm_init_debug(); |
2296 | ||
f8c16bba ZX |
2297 | r = kvm_arch_init(opaque); |
2298 | if (r) | |
d2308784 | 2299 | goto out_fail; |
cb498ea2 ZX |
2300 | |
2301 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2302 | ||
2303 | if (bad_page == NULL) { | |
2304 | r = -ENOMEM; | |
2305 | goto out; | |
2306 | } | |
2307 | ||
35149e21 AL |
2308 | bad_pfn = page_to_pfn(bad_page); |
2309 | ||
7f59f492 RR |
2310 | if (!alloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
2311 | r = -ENOMEM; | |
2312 | goto out_free_0; | |
2313 | } | |
2314 | ||
e9b11c17 | 2315 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2316 | if (r < 0) |
7f59f492 | 2317 | goto out_free_0a; |
6aa8b732 | 2318 | |
002c7f7c YS |
2319 | for_each_online_cpu(cpu) { |
2320 | smp_call_function_single(cpu, | |
e9b11c17 | 2321 | kvm_arch_check_processor_compat, |
8691e5a8 | 2322 | &r, 1); |
002c7f7c | 2323 | if (r < 0) |
d2308784 | 2324 | goto out_free_1; |
002c7f7c YS |
2325 | } |
2326 | ||
15c8b6c1 | 2327 | on_each_cpu(hardware_enable, NULL, 1); |
774c47f1 AK |
2328 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2329 | if (r) | |
d2308784 | 2330 | goto out_free_2; |
6aa8b732 AK |
2331 | register_reboot_notifier(&kvm_reboot_notifier); |
2332 | ||
59ae6c6b AK |
2333 | r = sysdev_class_register(&kvm_sysdev_class); |
2334 | if (r) | |
d2308784 | 2335 | goto out_free_3; |
59ae6c6b AK |
2336 | |
2337 | r = sysdev_register(&kvm_sysdev); | |
2338 | if (r) | |
d2308784 | 2339 | goto out_free_4; |
59ae6c6b | 2340 | |
c16f862d RR |
2341 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
2342 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
56919c5c JP |
2343 | __alignof__(struct kvm_vcpu), |
2344 | 0, NULL); | |
c16f862d RR |
2345 | if (!kvm_vcpu_cache) { |
2346 | r = -ENOMEM; | |
d2308784 | 2347 | goto out_free_5; |
c16f862d RR |
2348 | } |
2349 | ||
6aa8b732 | 2350 | kvm_chardev_ops.owner = module; |
3d3aab1b CB |
2351 | kvm_vm_fops.owner = module; |
2352 | kvm_vcpu_fops.owner = module; | |
6aa8b732 AK |
2353 | |
2354 | r = misc_register(&kvm_dev); | |
2355 | if (r) { | |
d77c26fc | 2356 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
2357 | goto out_free; |
2358 | } | |
2359 | ||
15ad7146 AK |
2360 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2361 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
5319c662 SY |
2362 | #ifndef CONFIG_X86 |
2363 | msi2intx = 0; | |
2364 | #endif | |
15ad7146 | 2365 | |
c7addb90 | 2366 | return 0; |
6aa8b732 AK |
2367 | |
2368 | out_free: | |
c16f862d | 2369 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2370 | out_free_5: |
59ae6c6b | 2371 | sysdev_unregister(&kvm_sysdev); |
d2308784 | 2372 | out_free_4: |
59ae6c6b | 2373 | sysdev_class_unregister(&kvm_sysdev_class); |
d2308784 | 2374 | out_free_3: |
6aa8b732 | 2375 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2376 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2377 | out_free_2: |
15c8b6c1 | 2378 | on_each_cpu(hardware_disable, NULL, 1); |
d2308784 | 2379 | out_free_1: |
e9b11c17 | 2380 | kvm_arch_hardware_unsetup(); |
7f59f492 RR |
2381 | out_free_0a: |
2382 | free_cpumask_var(cpus_hardware_enabled); | |
d2308784 ZX |
2383 | out_free_0: |
2384 | __free_page(bad_page); | |
ca45aaae | 2385 | out: |
f8c16bba | 2386 | kvm_arch_exit(); |
cb498ea2 | 2387 | kvm_exit_debug(); |
d2308784 | 2388 | out_fail: |
6aa8b732 AK |
2389 | return r; |
2390 | } | |
cb498ea2 | 2391 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2392 | |
cb498ea2 | 2393 | void kvm_exit(void) |
6aa8b732 | 2394 | { |
d4c9ff2d | 2395 | kvm_trace_cleanup(); |
6aa8b732 | 2396 | misc_deregister(&kvm_dev); |
c16f862d | 2397 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
2398 | sysdev_unregister(&kvm_sysdev); |
2399 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2400 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2401 | unregister_cpu_notifier(&kvm_cpu_notifier); |
15c8b6c1 | 2402 | on_each_cpu(hardware_disable, NULL, 1); |
e9b11c17 | 2403 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2404 | kvm_arch_exit(); |
6aa8b732 | 2405 | kvm_exit_debug(); |
7f59f492 | 2406 | free_cpumask_var(cpus_hardware_enabled); |
cea7bb21 | 2407 | __free_page(bad_page); |
6aa8b732 | 2408 | } |
cb498ea2 | 2409 | EXPORT_SYMBOL_GPL(kvm_exit); |