1 #ifndef __KVM_HOST_H
2 #define __KVM_HOST_H
3
4 /*
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
7 */
8
9 #include <linux/types.h>
10 #include <linux/hardirq.h>
11 #include <linux/list.h>
12 #include <linux/mutex.h>
13 #include <linux/spinlock.h>
14 #include <linux/signal.h>
15 #include <linux/sched.h>
16 #include <linux/mm.h>
17 #include <linux/preempt.h>
18 #include <linux/msi.h>
19 #include <linux/slab.h>
20 #include <linux/rcupdate.h>
21 #include <asm/signal.h>
22
23 #include <linux/kvm.h>
24 #include <linux/kvm_para.h>
25
26 #include <linux/kvm_types.h>
27
28 #include <asm/kvm_host.h>
29
30 /*
31 * vcpu->requests bit members
32 */
33 #define KVM_REQ_TLB_FLUSH 0
34 #define KVM_REQ_MIGRATE_TIMER 1
35 #define KVM_REQ_REPORT_TPR_ACCESS 2
36 #define KVM_REQ_MMU_RELOAD 3
37 #define KVM_REQ_TRIPLE_FAULT 4
38 #define KVM_REQ_PENDING_TIMER 5
39 #define KVM_REQ_UNHALT 6
40 #define KVM_REQ_MMU_SYNC 7
41 #define KVM_REQ_CLOCK_UPDATE 8
42 #define KVM_REQ_KICK 9
43 #define KVM_REQ_DEACTIVATE_FPU 10
44 #define KVM_REQ_EVENT 11
45 #define KVM_REQ_APF_HALT 12
46 #define KVM_REQ_NMI 13
47
48 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
49
50 struct kvm;
51 struct kvm_vcpu;
52 extern struct kmem_cache *kvm_vcpu_cache;
53
54 /*
55 * It would be nice to use something smarter than a linear search, TBD...
56 * Thankfully we dont expect many devices to register (famous last words :),
57 * so until then it will suffice. At least its abstracted so we can change
58 * in one place.
59 */
60 struct kvm_io_bus {
61 int dev_count;
62 #define NR_IOBUS_DEVS 200
63 struct kvm_io_device *devs[NR_IOBUS_DEVS];
64 };
65
66 enum kvm_bus {
67 KVM_MMIO_BUS,
68 KVM_PIO_BUS,
69 KVM_NR_BUSES
70 };
71
72 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
73 int len, const void *val);
74 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
75 void *val);
76 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
77 struct kvm_io_device *dev);
78 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
79 struct kvm_io_device *dev);
80
81 #ifdef CONFIG_KVM_ASYNC_PF
82 struct kvm_async_pf {
83 struct work_struct work;
84 struct list_head link;
85 struct list_head queue;
86 struct kvm_vcpu *vcpu;
87 struct mm_struct *mm;
88 gva_t gva;
89 unsigned long addr;
90 struct kvm_arch_async_pf arch;
91 struct page *page;
92 bool done;
93 };
94
95 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
96 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
97 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
98 struct kvm_arch_async_pf *arch);
99 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
100 #endif
101
102 enum {
103 OUTSIDE_GUEST_MODE,
104 IN_GUEST_MODE,
105 EXITING_GUEST_MODE
106 };
107
108 struct kvm_vcpu {
109 struct kvm *kvm;
110 #ifdef CONFIG_PREEMPT_NOTIFIERS
111 struct preempt_notifier preempt_notifier;
112 #endif
113 int cpu;
114 int vcpu_id;
115 int srcu_idx;
116 int mode;
117 unsigned long requests;
118 unsigned long guest_debug;
119
120 struct mutex mutex;
121 struct kvm_run *run;
122
123 int fpu_active;
124 int guest_fpu_loaded, guest_xcr0_loaded;
125 wait_queue_head_t wq;
126 struct pid *pid;
127 int sigset_active;
128 sigset_t sigset;
129 struct kvm_vcpu_stat stat;
130
131 #ifdef CONFIG_HAS_IOMEM
132 int mmio_needed;
133 int mmio_read_completed;
134 int mmio_is_write;
135 int mmio_size;
136 unsigned char mmio_data[8];
137 gpa_t mmio_phys_addr;
138 #endif
139
140 #ifdef CONFIG_KVM_ASYNC_PF
141 struct {
142 u32 queued;
143 struct list_head queue;
144 struct list_head done;
145 spinlock_t lock;
146 } async_pf;
147 #endif
148
149 struct kvm_vcpu_arch arch;
150 };
151
kvm_vcpu_exiting_guest_mode(struct kvm_vcpu * vcpu)152 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
153 {
154 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
155 }
156
157 /*
158 * Some of the bitops functions do not support too long bitmaps.
159 * This number must be determined not to exceed such limits.
160 */
161 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
162
163 struct kvm_lpage_info {
164 unsigned long rmap_pde;
165 int write_count;
166 };
167
168 struct kvm_memory_slot {
169 gfn_t base_gfn;
170 unsigned long npages;
171 unsigned long flags;
172 unsigned long *rmap;
173 unsigned long *dirty_bitmap;
174 unsigned long *dirty_bitmap_head;
175 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
176 unsigned long userspace_addr;
177 int user_alloc;
178 int id;
179 };
180
kvm_dirty_bitmap_bytes(struct kvm_memory_slot * memslot)181 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
182 {
183 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
184 }
185
186 struct kvm_kernel_irq_routing_entry {
187 u32 gsi;
188 u32 type;
189 int (*set)(struct kvm_kernel_irq_routing_entry *e,
190 struct kvm *kvm, int irq_source_id, int level);
191 union {
192 struct {
193 unsigned irqchip;
194 unsigned pin;
195 } irqchip;
196 struct msi_msg msi;
197 };
198 struct hlist_node link;
199 };
200
201 #ifdef __KVM_HAVE_IOAPIC
202
203 struct kvm_irq_routing_table {
204 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
205 struct kvm_kernel_irq_routing_entry *rt_entries;
206 u32 nr_rt_entries;
207 /*
208 * Array indexed by gsi. Each entry contains list of irq chips
209 * the gsi is connected to.
210 */
211 struct hlist_head map[0];
212 };
213
214 #else
215
216 struct kvm_irq_routing_table {};
217
218 #endif
219
220 struct kvm_memslots {
221 int nmemslots;
222 u64 generation;
223 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
224 KVM_PRIVATE_MEM_SLOTS];
225 };
226
227 struct kvm {
228 spinlock_t mmu_lock;
229 struct mutex slots_lock;
230 struct mm_struct *mm; /* userspace tied to this vm */
231 struct kvm_memslots *memslots;
232 struct srcu_struct srcu;
233 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
234 u32 bsp_vcpu_id;
235 struct kvm_vcpu *bsp_vcpu;
236 #endif
237 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
238 atomic_t online_vcpus;
239 int last_boosted_vcpu;
240 struct list_head vm_list;
241 struct mutex lock;
242 struct kvm_io_bus *buses[KVM_NR_BUSES];
243 #ifdef CONFIG_HAVE_KVM_EVENTFD
244 struct {
245 spinlock_t lock;
246 struct list_head items;
247 } irqfds;
248 struct list_head ioeventfds;
249 #endif
250 struct kvm_vm_stat stat;
251 struct kvm_arch arch;
252 atomic_t users_count;
253 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
254 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
255 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
256 #endif
257
258 struct mutex irq_lock;
259 #ifdef CONFIG_HAVE_KVM_IRQCHIP
260 /*
261 * Update side is protected by irq_lock and,
262 * if configured, irqfds.lock.
263 */
264 struct kvm_irq_routing_table __rcu *irq_routing;
265 struct hlist_head mask_notifier_list;
266 struct hlist_head irq_ack_notifier_list;
267 #endif
268
269 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
270 struct mmu_notifier mmu_notifier;
271 unsigned long mmu_notifier_seq;
272 long mmu_notifier_count;
273 #endif
274 long tlbs_dirty;
275 };
276
277 /* The guest did something we don't support. */
278 #define pr_unimpl(vcpu, fmt, ...) \
279 do { \
280 if (printk_ratelimit()) \
281 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
282 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
283 } while (0)
284
285 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
286 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
287
kvm_get_vcpu(struct kvm * kvm,int i)288 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
289 {
290 smp_rmb();
291 return kvm->vcpus[i];
292 }
293
294 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
295 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
296 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
297 vcpup = kvm_get_vcpu(kvm, ++idx))
298
299 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
300 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
301
302 void vcpu_load(struct kvm_vcpu *vcpu);
303 void vcpu_put(struct kvm_vcpu *vcpu);
304
305 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
306 struct module *module);
307 void kvm_exit(void);
308
309 void kvm_get_kvm(struct kvm *kvm);
310 void kvm_put_kvm(struct kvm *kvm);
311
kvm_memslots(struct kvm * kvm)312 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
313 {
314 return rcu_dereference_check(kvm->memslots,
315 srcu_read_lock_held(&kvm->srcu)
316 || lockdep_is_held(&kvm->slots_lock));
317 }
318
319 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
320 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
is_error_hpa(hpa_t hpa)321 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
322
323 extern struct page *bad_page;
324 extern pfn_t bad_pfn;
325
326 int is_error_page(struct page *page);
327 int is_error_pfn(pfn_t pfn);
328 int is_hwpoison_pfn(pfn_t pfn);
329 int is_fault_pfn(pfn_t pfn);
330 int kvm_is_error_hva(unsigned long addr);
331 int kvm_set_memory_region(struct kvm *kvm,
332 struct kvm_userspace_memory_region *mem,
333 int user_alloc);
334 int __kvm_set_memory_region(struct kvm *kvm,
335 struct kvm_userspace_memory_region *mem,
336 int user_alloc);
337 int kvm_arch_prepare_memory_region(struct kvm *kvm,
338 struct kvm_memory_slot *memslot,
339 struct kvm_memory_slot old,
340 struct kvm_userspace_memory_region *mem,
341 int user_alloc);
342 void kvm_arch_commit_memory_region(struct kvm *kvm,
343 struct kvm_userspace_memory_region *mem,
344 struct kvm_memory_slot old,
345 int user_alloc);
346 void kvm_disable_largepages(void);
347 void kvm_arch_flush_shadow(struct kvm *kvm);
348
349 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
350 int nr_pages);
351
352 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
353 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
354 void kvm_release_page_clean(struct page *page);
355 void kvm_release_page_dirty(struct page *page);
356 void kvm_set_page_dirty(struct page *page);
357 void kvm_set_page_accessed(struct page *page);
358
359 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
360 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
361 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
362 bool write_fault, bool *writable);
363 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
364 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
365 bool *writable);
366 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
367 struct kvm_memory_slot *slot, gfn_t gfn);
368 int memslot_id(struct kvm *kvm, gfn_t gfn);
369 void kvm_release_pfn_dirty(pfn_t);
370 void kvm_release_pfn_clean(pfn_t pfn);
371 void kvm_set_pfn_dirty(pfn_t pfn);
372 void kvm_set_pfn_accessed(pfn_t pfn);
373 void kvm_get_pfn(pfn_t pfn);
374
375 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
376 int len);
377 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
378 unsigned long len);
379 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
380 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
381 int offset, int len);
382 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
383 unsigned long len);
384 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
385 void *data, unsigned long len);
386 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
387 gpa_t gpa);
388 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
389 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
390 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
391 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
392 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
393 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
394 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
395 gfn_t gfn);
396
397 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
398 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
399 void kvm_resched(struct kvm_vcpu *vcpu);
400 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
401 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
402
403 void kvm_flush_remote_tlbs(struct kvm *kvm);
404 void kvm_reload_remote_mmus(struct kvm *kvm);
405
406 long kvm_arch_dev_ioctl(struct file *filp,
407 unsigned int ioctl, unsigned long arg);
408 long kvm_arch_vcpu_ioctl(struct file *filp,
409 unsigned int ioctl, unsigned long arg);
410
411 int kvm_dev_ioctl_check_extension(long ext);
412
413 int kvm_get_dirty_log(struct kvm *kvm,
414 struct kvm_dirty_log *log, int *is_dirty);
415 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
416 struct kvm_dirty_log *log);
417
418 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
419 struct
420 kvm_userspace_memory_region *mem,
421 int user_alloc);
422 long kvm_arch_vm_ioctl(struct file *filp,
423 unsigned int ioctl, unsigned long arg);
424
425 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
426 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
427
428 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
429 struct kvm_translation *tr);
430
431 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
432 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
433 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
434 struct kvm_sregs *sregs);
435 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
436 struct kvm_sregs *sregs);
437 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
438 struct kvm_mp_state *mp_state);
439 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
440 struct kvm_mp_state *mp_state);
441 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
442 struct kvm_guest_debug *dbg);
443 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
444
445 int kvm_arch_init(void *opaque);
446 void kvm_arch_exit(void);
447
448 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
449 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
450
451 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
452 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
453 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
454 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
455 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
456 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
457
458 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
459 int kvm_arch_hardware_enable(void *garbage);
460 void kvm_arch_hardware_disable(void *garbage);
461 int kvm_arch_hardware_setup(void);
462 void kvm_arch_hardware_unsetup(void);
463 void kvm_arch_check_processor_compat(void *rtn);
464 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
465
466 void kvm_free_physmem(struct kvm *kvm);
467
468 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
kvm_arch_alloc_vm(void)469 static inline struct kvm *kvm_arch_alloc_vm(void)
470 {
471 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
472 }
473
kvm_arch_free_vm(struct kvm * kvm)474 static inline void kvm_arch_free_vm(struct kvm *kvm)
475 {
476 kfree(kvm);
477 }
478 #endif
479
480 int kvm_arch_init_vm(struct kvm *kvm);
481 void kvm_arch_destroy_vm(struct kvm *kvm);
482 void kvm_free_all_assigned_devices(struct kvm *kvm);
483 void kvm_arch_sync_events(struct kvm *kvm);
484
485 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
486 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
487
488 int kvm_is_mmio_pfn(pfn_t pfn);
489
490 struct kvm_irq_ack_notifier {
491 struct hlist_node link;
492 unsigned gsi;
493 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
494 };
495
496 struct kvm_assigned_dev_kernel {
497 struct kvm_irq_ack_notifier ack_notifier;
498 struct list_head list;
499 int assigned_dev_id;
500 int host_segnr;
501 int host_busnr;
502 int host_devfn;
503 unsigned int entries_nr;
504 int host_irq;
505 bool host_irq_disabled;
506 struct msix_entry *host_msix_entries;
507 int guest_irq;
508 struct msix_entry *guest_msix_entries;
509 unsigned long irq_requested_type;
510 int irq_source_id;
511 int flags;
512 struct pci_dev *dev;
513 struct kvm *kvm;
514 spinlock_t intx_lock;
515 char irq_name[32];
516 };
517
518 struct kvm_irq_mask_notifier {
519 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
520 int irq;
521 struct hlist_node link;
522 };
523
524 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
525 struct kvm_irq_mask_notifier *kimn);
526 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
527 struct kvm_irq_mask_notifier *kimn);
528 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
529 bool mask);
530
531 #ifdef __KVM_HAVE_IOAPIC
532 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
533 union kvm_ioapic_redirect_entry *entry,
534 unsigned long *deliver_bitmask);
535 #endif
536 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
537 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
538 int irq_source_id, int level);
539 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
540 void kvm_register_irq_ack_notifier(struct kvm *kvm,
541 struct kvm_irq_ack_notifier *kian);
542 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
543 struct kvm_irq_ack_notifier *kian);
544 int kvm_request_irq_source_id(struct kvm *kvm);
545 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
546
547 /* For vcpu->arch.iommu_flags */
548 #define KVM_IOMMU_CACHE_COHERENCY 0x1
549
550 #ifdef CONFIG_IOMMU_API
551 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
552 int kvm_iommu_map_guest(struct kvm *kvm);
553 int kvm_iommu_unmap_guest(struct kvm *kvm);
554 int kvm_assign_device(struct kvm *kvm,
555 struct kvm_assigned_dev_kernel *assigned_dev);
556 int kvm_deassign_device(struct kvm *kvm,
557 struct kvm_assigned_dev_kernel *assigned_dev);
558 #else /* CONFIG_IOMMU_API */
kvm_iommu_map_pages(struct kvm * kvm,struct kvm_memory_slot * slot)559 static inline int kvm_iommu_map_pages(struct kvm *kvm,
560 struct kvm_memory_slot *slot)
561 {
562 return 0;
563 }
564
kvm_iommu_map_guest(struct kvm * kvm)565 static inline int kvm_iommu_map_guest(struct kvm *kvm)
566 {
567 return -ENODEV;
568 }
569
kvm_iommu_unmap_guest(struct kvm * kvm)570 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
571 {
572 return 0;
573 }
574
kvm_assign_device(struct kvm * kvm,struct kvm_assigned_dev_kernel * assigned_dev)575 static inline int kvm_assign_device(struct kvm *kvm,
576 struct kvm_assigned_dev_kernel *assigned_dev)
577 {
578 return 0;
579 }
580
kvm_deassign_device(struct kvm * kvm,struct kvm_assigned_dev_kernel * assigned_dev)581 static inline int kvm_deassign_device(struct kvm *kvm,
582 struct kvm_assigned_dev_kernel *assigned_dev)
583 {
584 return 0;
585 }
586 #endif /* CONFIG_IOMMU_API */
587
kvm_guest_enter(void)588 static inline void kvm_guest_enter(void)
589 {
590 account_system_vtime(current);
591 current->flags |= PF_VCPU;
592 }
593
kvm_guest_exit(void)594 static inline void kvm_guest_exit(void)
595 {
596 account_system_vtime(current);
597 current->flags &= ~PF_VCPU;
598 }
599
gfn_to_hva_memslot(struct kvm_memory_slot * slot,gfn_t gfn)600 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
601 gfn_t gfn)
602 {
603 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
604 }
605
gfn_to_gpa(gfn_t gfn)606 static inline gpa_t gfn_to_gpa(gfn_t gfn)
607 {
608 return (gpa_t)gfn << PAGE_SHIFT;
609 }
610
gpa_to_gfn(gpa_t gpa)611 static inline gfn_t gpa_to_gfn(gpa_t gpa)
612 {
613 return (gfn_t)(gpa >> PAGE_SHIFT);
614 }
615
pfn_to_hpa(pfn_t pfn)616 static inline hpa_t pfn_to_hpa(pfn_t pfn)
617 {
618 return (hpa_t)pfn << PAGE_SHIFT;
619 }
620
kvm_migrate_timers(struct kvm_vcpu * vcpu)621 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
622 {
623 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
624 }
625
626 enum kvm_stat_kind {
627 KVM_STAT_VM,
628 KVM_STAT_VCPU,
629 };
630
631 struct kvm_stats_debugfs_item {
632 const char *name;
633 int offset;
634 enum kvm_stat_kind kind;
635 struct dentry *dentry;
636 };
637 extern struct kvm_stats_debugfs_item debugfs_entries[];
638 extern struct dentry *kvm_debugfs_dir;
639
640 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
mmu_notifier_retry(struct kvm_vcpu * vcpu,unsigned long mmu_seq)641 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
642 {
643 if (unlikely(vcpu->kvm->mmu_notifier_count))
644 return 1;
645 /*
646 * Both reads happen under the mmu_lock and both values are
647 * modified under mmu_lock, so there's no need of smb_rmb()
648 * here in between, otherwise mmu_notifier_count should be
649 * read before mmu_notifier_seq, see
650 * mmu_notifier_invalidate_range_end write side.
651 */
652 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
653 return 1;
654 return 0;
655 }
656 #endif
657
658 #ifdef CONFIG_HAVE_KVM_IRQCHIP
659
660 #define KVM_MAX_IRQ_ROUTES 1024
661
662 int kvm_setup_default_irq_routing(struct kvm *kvm);
663 int kvm_set_irq_routing(struct kvm *kvm,
664 const struct kvm_irq_routing_entry *entries,
665 unsigned nr,
666 unsigned flags);
667 void kvm_free_irq_routing(struct kvm *kvm);
668
669 #else
670
kvm_free_irq_routing(struct kvm * kvm)671 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
672
673 #endif
674
675 #ifdef CONFIG_HAVE_KVM_EVENTFD
676
677 void kvm_eventfd_init(struct kvm *kvm);
678 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
679 void kvm_irqfd_release(struct kvm *kvm);
680 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
681 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
682
683 #else
684
kvm_eventfd_init(struct kvm * kvm)685 static inline void kvm_eventfd_init(struct kvm *kvm) {}
686
kvm_irqfd(struct kvm * kvm,int fd,int gsi,int flags)687 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
688 {
689 return -EINVAL;
690 }
691
kvm_irqfd_release(struct kvm * kvm)692 static inline void kvm_irqfd_release(struct kvm *kvm) {}
693
694 #ifdef CONFIG_HAVE_KVM_IRQCHIP
kvm_irq_routing_update(struct kvm * kvm,struct kvm_irq_routing_table * irq_rt)695 static inline void kvm_irq_routing_update(struct kvm *kvm,
696 struct kvm_irq_routing_table *irq_rt)
697 {
698 rcu_assign_pointer(kvm->irq_routing, irq_rt);
699 }
700 #endif
701
kvm_ioeventfd(struct kvm * kvm,struct kvm_ioeventfd * args)702 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
703 {
704 return -ENOSYS;
705 }
706
707 #endif /* CONFIG_HAVE_KVM_EVENTFD */
708
709 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
kvm_vcpu_is_bsp(struct kvm_vcpu * vcpu)710 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
711 {
712 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
713 }
714 #endif
715
716 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
717
718 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
719 unsigned long arg);
720
721 #else
722
kvm_vm_ioctl_assigned_device(struct kvm * kvm,unsigned ioctl,unsigned long arg)723 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
724 unsigned long arg)
725 {
726 return -ENOTTY;
727 }
728
729 #endif
730
kvm_make_request(int req,struct kvm_vcpu * vcpu)731 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
732 {
733 set_bit(req, &vcpu->requests);
734 }
735
kvm_check_request(int req,struct kvm_vcpu * vcpu)736 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
737 {
738 if (test_bit(req, &vcpu->requests)) {
739 clear_bit(req, &vcpu->requests);
740 return true;
741 } else {
742 return false;
743 }
744 }
745
746 #endif
747
748