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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/bug.h> |
17 | #include <linux/mm.h> |
18 | #include <linux/mmu_notifier.h> |
19 | #include <linux/preempt.h> |
20 | #include <linux/msi.h> |
21 | #include <linux/slab.h> |
22 | #include <linux/rcupdate.h> |
23 | #include <linux/ratelimit.h> |
24 | #include <linux/err.h> |
25 | #include <linux/irqflags.h> |
26 | #include <asm/signal.h> |
27 | |
28 | #include <linux/kvm.h> |
29 | #include <linux/kvm_para.h> |
30 | |
31 | #include <linux/kvm_types.h> |
32 | |
33 | #include <asm/kvm_host.h> |
34 | |
35 | #ifndef KVM_MMIO_SIZE |
36 | #define KVM_MMIO_SIZE 8 |
37 | #endif |
38 | |
39 | /* |
40 | * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used |
41 | * in kvm, other bits are visible for userspace which are defined in |
42 | * include/linux/kvm_h. |
43 | */ |
44 | #define KVM_MEMSLOT_INVALID (1UL << 16) |
45 | |
46 | /* Two fragments for cross MMIO pages. */ |
47 | #define KVM_MAX_MMIO_FRAGMENTS 2 |
48 | |
49 | /* |
50 | * For the normal pfn, the highest 12 bits should be zero, |
51 | * so we can mask bit 62 ~ bit 52 to indicate the error pfn, |
52 | * mask bit 63 to indicate the noslot pfn. |
53 | */ |
54 | #define KVM_PFN_ERR_MASK (0x7ffULL << 52) |
55 | #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52) |
56 | #define KVM_PFN_NOSLOT (0x1ULL << 63) |
57 | |
58 | #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) |
59 | #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) |
60 | #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) |
61 | |
62 | /* |
63 | * error pfns indicate that the gfn is in slot but faild to |
64 | * translate it to pfn on host. |
65 | */ |
66 | static inline bool is_error_pfn(pfn_t pfn) |
67 | { |
68 | return !!(pfn & KVM_PFN_ERR_MASK); |
69 | } |
70 | |
71 | /* |
72 | * error_noslot pfns indicate that the gfn can not be |
73 | * translated to pfn - it is not in slot or failed to |
74 | * translate it to pfn. |
75 | */ |
76 | static inline bool is_error_noslot_pfn(pfn_t pfn) |
77 | { |
78 | return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK); |
79 | } |
80 | |
81 | /* noslot pfn indicates that the gfn is not in slot. */ |
82 | static inline bool is_noslot_pfn(pfn_t pfn) |
83 | { |
84 | return pfn == KVM_PFN_NOSLOT; |
85 | } |
86 | |
87 | #define KVM_HVA_ERR_BAD (PAGE_OFFSET) |
88 | #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) |
89 | |
90 | static inline bool kvm_is_error_hva(unsigned long addr) |
91 | { |
92 | return addr >= PAGE_OFFSET; |
93 | } |
94 | |
95 | #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) |
96 | |
97 | static inline bool is_error_page(struct page *page) |
98 | { |
99 | return IS_ERR(page); |
100 | } |
101 | |
102 | /* |
103 | * vcpu->requests bit members |
104 | */ |
105 | #define KVM_REQ_TLB_FLUSH 0 |
106 | #define KVM_REQ_MIGRATE_TIMER 1 |
107 | #define KVM_REQ_REPORT_TPR_ACCESS 2 |
108 | #define KVM_REQ_MMU_RELOAD 3 |
109 | #define KVM_REQ_TRIPLE_FAULT 4 |
110 | #define KVM_REQ_PENDING_TIMER 5 |
111 | #define KVM_REQ_UNHALT 6 |
112 | #define KVM_REQ_MMU_SYNC 7 |
113 | #define KVM_REQ_CLOCK_UPDATE 8 |
114 | #define KVM_REQ_KICK 9 |
115 | #define KVM_REQ_DEACTIVATE_FPU 10 |
116 | #define KVM_REQ_EVENT 11 |
117 | #define KVM_REQ_APF_HALT 12 |
118 | #define KVM_REQ_STEAL_UPDATE 13 |
119 | #define KVM_REQ_NMI 14 |
120 | #define KVM_REQ_IMMEDIATE_EXIT 15 |
121 | #define KVM_REQ_PMU 16 |
122 | #define KVM_REQ_PMI 17 |
123 | #define KVM_REQ_WATCHDOG 18 |
124 | #define KVM_REQ_MASTERCLOCK_UPDATE 19 |
125 | #define KVM_REQ_MCLOCK_INPROGRESS 20 |
126 | #define KVM_REQ_EPR_EXIT 21 |
127 | #define KVM_REQ_EOIBITMAP 22 |
128 | |
129 | #define KVM_USERSPACE_IRQ_SOURCE_ID 0 |
130 | #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 |
131 | |
132 | struct kvm; |
133 | struct kvm_vcpu; |
134 | extern struct kmem_cache *kvm_vcpu_cache; |
135 | |
136 | struct kvm_io_range { |
137 | gpa_t addr; |
138 | int len; |
139 | struct kvm_io_device *dev; |
140 | }; |
141 | |
142 | #define NR_IOBUS_DEVS 1000 |
143 | |
144 | struct kvm_io_bus { |
145 | int dev_count; |
146 | struct kvm_io_range range[]; |
147 | }; |
148 | |
149 | enum kvm_bus { |
150 | KVM_MMIO_BUS, |
151 | KVM_PIO_BUS, |
152 | KVM_NR_BUSES |
153 | }; |
154 | |
155 | int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
156 | int len, const void *val); |
157 | int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, |
158 | void *val); |
159 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
160 | int len, struct kvm_io_device *dev); |
161 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
162 | struct kvm_io_device *dev); |
163 | |
164 | #ifdef CONFIG_KVM_ASYNC_PF |
165 | struct kvm_async_pf { |
166 | struct work_struct work; |
167 | struct list_head link; |
168 | struct list_head queue; |
169 | struct kvm_vcpu *vcpu; |
170 | struct mm_struct *mm; |
171 | gva_t gva; |
172 | unsigned long addr; |
173 | struct kvm_arch_async_pf arch; |
174 | struct page *page; |
175 | bool done; |
176 | }; |
177 | |
178 | void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); |
179 | void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); |
180 | int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn, |
181 | struct kvm_arch_async_pf *arch); |
182 | int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); |
183 | #endif |
184 | |
185 | enum { |
186 | OUTSIDE_GUEST_MODE, |
187 | IN_GUEST_MODE, |
188 | EXITING_GUEST_MODE, |
189 | READING_SHADOW_PAGE_TABLES, |
190 | }; |
191 | |
192 | /* |
193 | * Sometimes a large or cross-page mmio needs to be broken up into separate |
194 | * exits for userspace servicing. |
195 | */ |
196 | struct kvm_mmio_fragment { |
197 | gpa_t gpa; |
198 | void *data; |
199 | unsigned len; |
200 | }; |
201 | |
202 | struct kvm_vcpu { |
203 | struct kvm *kvm; |
204 | #ifdef CONFIG_PREEMPT_NOTIFIERS |
205 | struct preempt_notifier preempt_notifier; |
206 | #endif |
207 | int cpu; |
208 | int vcpu_id; |
209 | int srcu_idx; |
210 | int mode; |
211 | unsigned long requests; |
212 | unsigned long guest_debug; |
213 | |
214 | struct mutex mutex; |
215 | struct kvm_run *run; |
216 | |
217 | int fpu_active; |
218 | int guest_fpu_loaded, guest_xcr0_loaded; |
219 | wait_queue_head_t wq; |
220 | struct pid *pid; |
221 | int sigset_active; |
222 | sigset_t sigset; |
223 | struct kvm_vcpu_stat stat; |
224 | |
225 | #ifdef CONFIG_HAS_IOMEM |
226 | int mmio_needed; |
227 | int mmio_read_completed; |
228 | int mmio_is_write; |
229 | int mmio_cur_fragment; |
230 | int mmio_nr_fragments; |
231 | struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; |
232 | #endif |
233 | |
234 | #ifdef CONFIG_KVM_ASYNC_PF |
235 | struct { |
236 | u32 queued; |
237 | struct list_head queue; |
238 | struct list_head done; |
239 | spinlock_t lock; |
240 | } async_pf; |
241 | #endif |
242 | |
243 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
244 | /* |
245 | * Cpu relax intercept or pause loop exit optimization |
246 | * in_spin_loop: set when a vcpu does a pause loop exit |
247 | * or cpu relax intercepted. |
248 | * dy_eligible: indicates whether vcpu is eligible for directed yield. |
249 | */ |
250 | struct { |
251 | bool in_spin_loop; |
252 | bool dy_eligible; |
253 | } spin_loop; |
254 | #endif |
255 | struct kvm_vcpu_arch arch; |
256 | }; |
257 | |
258 | static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) |
259 | { |
260 | return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); |
261 | } |
262 | |
263 | /* |
264 | * Some of the bitops functions do not support too long bitmaps. |
265 | * This number must be determined not to exceed such limits. |
266 | */ |
267 | #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) |
268 | |
269 | struct kvm_memory_slot { |
270 | gfn_t base_gfn; |
271 | unsigned long npages; |
272 | unsigned long *dirty_bitmap; |
273 | struct kvm_arch_memory_slot arch; |
274 | unsigned long userspace_addr; |
275 | u32 flags; |
276 | short id; |
277 | }; |
278 | |
279 | static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) |
280 | { |
281 | return ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
282 | } |
283 | |
284 | struct kvm_kernel_irq_routing_entry { |
285 | u32 gsi; |
286 | u32 type; |
287 | int (*set)(struct kvm_kernel_irq_routing_entry *e, |
288 | struct kvm *kvm, int irq_source_id, int level); |
289 | union { |
290 | struct { |
291 | unsigned irqchip; |
292 | unsigned pin; |
293 | } irqchip; |
294 | struct msi_msg msi; |
295 | }; |
296 | struct hlist_node link; |
297 | }; |
298 | |
299 | #ifdef __KVM_HAVE_IOAPIC |
300 | |
301 | struct kvm_irq_routing_table { |
302 | int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS]; |
303 | struct kvm_kernel_irq_routing_entry *rt_entries; |
304 | u32 nr_rt_entries; |
305 | /* |
306 | * Array indexed by gsi. Each entry contains list of irq chips |
307 | * the gsi is connected to. |
308 | */ |
309 | struct hlist_head map[0]; |
310 | }; |
311 | |
312 | #else |
313 | |
314 | struct kvm_irq_routing_table {}; |
315 | |
316 | #endif |
317 | |
318 | #ifndef KVM_PRIVATE_MEM_SLOTS |
319 | #define KVM_PRIVATE_MEM_SLOTS 0 |
320 | #endif |
321 | |
322 | #ifndef KVM_MEM_SLOTS_NUM |
323 | #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
324 | #endif |
325 | |
326 | /* |
327 | * Note: |
328 | * memslots are not sorted by id anymore, please use id_to_memslot() |
329 | * to get the memslot by its id. |
330 | */ |
331 | struct kvm_memslots { |
332 | u64 generation; |
333 | struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; |
334 | /* The mapping table from slot id to the index in memslots[]. */ |
335 | short id_to_index[KVM_MEM_SLOTS_NUM]; |
336 | }; |
337 | |
338 | struct kvm { |
339 | spinlock_t mmu_lock; |
340 | struct mutex slots_lock; |
341 | struct mm_struct *mm; /* userspace tied to this vm */ |
342 | struct kvm_memslots *memslots; |
343 | struct srcu_struct srcu; |
344 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
345 | u32 bsp_vcpu_id; |
346 | #endif |
347 | struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; |
348 | atomic_t online_vcpus; |
349 | int last_boosted_vcpu; |
350 | struct list_head vm_list; |
351 | struct mutex lock; |
352 | struct kvm_io_bus *buses[KVM_NR_BUSES]; |
353 | #ifdef CONFIG_HAVE_KVM_EVENTFD |
354 | struct { |
355 | spinlock_t lock; |
356 | struct list_head items; |
357 | struct list_head resampler_list; |
358 | struct mutex resampler_lock; |
359 | } irqfds; |
360 | struct list_head ioeventfds; |
361 | #endif |
362 | struct kvm_vm_stat stat; |
363 | struct kvm_arch arch; |
364 | atomic_t users_count; |
365 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
366 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
367 | spinlock_t ring_lock; |
368 | struct list_head coalesced_zones; |
369 | #endif |
370 | |
371 | struct mutex irq_lock; |
372 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
373 | /* |
374 | * Update side is protected by irq_lock and, |
375 | * if configured, irqfds.lock. |
376 | */ |
377 | struct kvm_irq_routing_table __rcu *irq_routing; |
378 | struct hlist_head mask_notifier_list; |
379 | struct hlist_head irq_ack_notifier_list; |
380 | #endif |
381 | |
382 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
383 | struct mmu_notifier mmu_notifier; |
384 | unsigned long mmu_notifier_seq; |
385 | long mmu_notifier_count; |
386 | #endif |
387 | long tlbs_dirty; |
388 | }; |
389 | |
390 | #define kvm_err(fmt, ...) \ |
391 | pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) |
392 | #define kvm_info(fmt, ...) \ |
393 | pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) |
394 | #define kvm_debug(fmt, ...) \ |
395 | pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) |
396 | #define kvm_pr_unimpl(fmt, ...) \ |
397 | pr_err_ratelimited("kvm [%i]: " fmt, \ |
398 | task_tgid_nr(current), ## __VA_ARGS__) |
399 | |
400 | /* The guest did something we don't support. */ |
401 | #define vcpu_unimpl(vcpu, fmt, ...) \ |
402 | kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) |
403 | |
404 | static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) |
405 | { |
406 | smp_rmb(); |
407 | return kvm->vcpus[i]; |
408 | } |
409 | |
410 | #define kvm_for_each_vcpu(idx, vcpup, kvm) \ |
411 | for (idx = 0; \ |
412 | idx < atomic_read(&kvm->online_vcpus) && \ |
413 | (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ |
414 | idx++) |
415 | |
416 | #define kvm_for_each_memslot(memslot, slots) \ |
417 | for (memslot = &slots->memslots[0]; \ |
418 | memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ |
419 | memslot++) |
420 | |
421 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); |
422 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); |
423 | |
424 | int __must_check vcpu_load(struct kvm_vcpu *vcpu); |
425 | void vcpu_put(struct kvm_vcpu *vcpu); |
426 | |
427 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
428 | struct module *module); |
429 | void kvm_exit(void); |
430 | |
431 | void kvm_get_kvm(struct kvm *kvm); |
432 | void kvm_put_kvm(struct kvm *kvm); |
433 | void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new, |
434 | u64 last_generation); |
435 | |
436 | static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) |
437 | { |
438 | return rcu_dereference_check(kvm->memslots, |
439 | srcu_read_lock_held(&kvm->srcu) |
440 | || lockdep_is_held(&kvm->slots_lock)); |
441 | } |
442 | |
443 | static inline struct kvm_memory_slot * |
444 | id_to_memslot(struct kvm_memslots *slots, int id) |
445 | { |
446 | int index = slots->id_to_index[id]; |
447 | struct kvm_memory_slot *slot; |
448 | |
449 | slot = &slots->memslots[index]; |
450 | |
451 | WARN_ON(slot->id != id); |
452 | return slot; |
453 | } |
454 | |
455 | int kvm_set_memory_region(struct kvm *kvm, |
456 | struct kvm_userspace_memory_region *mem, |
457 | bool user_alloc); |
458 | int __kvm_set_memory_region(struct kvm *kvm, |
459 | struct kvm_userspace_memory_region *mem, |
460 | bool user_alloc); |
461 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
462 | struct kvm_memory_slot *dont); |
463 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages); |
464 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
465 | struct kvm_memory_slot *memslot, |
466 | struct kvm_memory_slot old, |
467 | struct kvm_userspace_memory_region *mem, |
468 | bool user_alloc); |
469 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
470 | struct kvm_userspace_memory_region *mem, |
471 | struct kvm_memory_slot old, |
472 | bool user_alloc); |
473 | bool kvm_largepages_enabled(void); |
474 | void kvm_disable_largepages(void); |
475 | /* flush all memory translations */ |
476 | void kvm_arch_flush_shadow_all(struct kvm *kvm); |
477 | /* flush memory translations pointing to 'slot' */ |
478 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
479 | struct kvm_memory_slot *slot); |
480 | |
481 | int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, |
482 | int nr_pages); |
483 | |
484 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); |
485 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); |
486 | unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); |
487 | void kvm_release_page_clean(struct page *page); |
488 | void kvm_release_page_dirty(struct page *page); |
489 | void kvm_set_page_dirty(struct page *page); |
490 | void kvm_set_page_accessed(struct page *page); |
491 | |
492 | pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); |
493 | pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, |
494 | bool write_fault, bool *writable); |
495 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); |
496 | pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
497 | bool *writable); |
498 | pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); |
499 | pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); |
500 | |
501 | void kvm_release_pfn_dirty(pfn_t pfn); |
502 | void kvm_release_pfn_clean(pfn_t pfn); |
503 | void kvm_set_pfn_dirty(pfn_t pfn); |
504 | void kvm_set_pfn_accessed(pfn_t pfn); |
505 | void kvm_get_pfn(pfn_t pfn); |
506 | |
507 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
508 | int len); |
509 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
510 | unsigned long len); |
511 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); |
512 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
513 | void *data, unsigned long len); |
514 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
515 | int offset, int len); |
516 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
517 | unsigned long len); |
518 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
519 | void *data, unsigned long len); |
520 | int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
521 | gpa_t gpa, unsigned long len); |
522 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); |
523 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); |
524 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); |
525 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); |
526 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); |
527 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn); |
528 | void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, |
529 | gfn_t gfn); |
530 | |
531 | void kvm_vcpu_block(struct kvm_vcpu *vcpu); |
532 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu); |
533 | bool kvm_vcpu_yield_to(struct kvm_vcpu *target); |
534 | void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); |
535 | void kvm_resched(struct kvm_vcpu *vcpu); |
536 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); |
537 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); |
538 | |
539 | void kvm_flush_remote_tlbs(struct kvm *kvm); |
540 | void kvm_reload_remote_mmus(struct kvm *kvm); |
541 | void kvm_make_mclock_inprogress_request(struct kvm *kvm); |
542 | void kvm_make_update_eoibitmap_request(struct kvm *kvm); |
543 | |
544 | long kvm_arch_dev_ioctl(struct file *filp, |
545 | unsigned int ioctl, unsigned long arg); |
546 | long kvm_arch_vcpu_ioctl(struct file *filp, |
547 | unsigned int ioctl, unsigned long arg); |
548 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf); |
549 | |
550 | int kvm_dev_ioctl_check_extension(long ext); |
551 | |
552 | int kvm_get_dirty_log(struct kvm *kvm, |
553 | struct kvm_dirty_log *log, int *is_dirty); |
554 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
555 | struct kvm_dirty_log *log); |
556 | |
557 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
558 | struct |
559 | kvm_userspace_memory_region *mem, |
560 | bool user_alloc); |
561 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level); |
562 | long kvm_arch_vm_ioctl(struct file *filp, |
563 | unsigned int ioctl, unsigned long arg); |
564 | |
565 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); |
566 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); |
567 | |
568 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
569 | struct kvm_translation *tr); |
570 | |
571 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); |
572 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); |
573 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
574 | struct kvm_sregs *sregs); |
575 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
576 | struct kvm_sregs *sregs); |
577 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
578 | struct kvm_mp_state *mp_state); |
579 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
580 | struct kvm_mp_state *mp_state); |
581 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
582 | struct kvm_guest_debug *dbg); |
583 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); |
584 | |
585 | int kvm_arch_init(void *opaque); |
586 | void kvm_arch_exit(void); |
587 | |
588 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); |
589 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); |
590 | |
591 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); |
592 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); |
593 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); |
594 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); |
595 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); |
596 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); |
597 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); |
598 | |
599 | int kvm_arch_hardware_enable(void *garbage); |
600 | void kvm_arch_hardware_disable(void *garbage); |
601 | int kvm_arch_hardware_setup(void); |
602 | void kvm_arch_hardware_unsetup(void); |
603 | void kvm_arch_check_processor_compat(void *rtn); |
604 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); |
605 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); |
606 | |
607 | void kvm_free_physmem(struct kvm *kvm); |
608 | |
609 | void *kvm_kvzalloc(unsigned long size); |
610 | void kvm_kvfree(const void *addr); |
611 | |
612 | #ifndef __KVM_HAVE_ARCH_VM_ALLOC |
613 | static inline struct kvm *kvm_arch_alloc_vm(void) |
614 | { |
615 | return kzalloc(sizeof(struct kvm), GFP_KERNEL); |
616 | } |
617 | |
618 | static inline void kvm_arch_free_vm(struct kvm *kvm) |
619 | { |
620 | kfree(kvm); |
621 | } |
622 | #endif |
623 | |
624 | static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) |
625 | { |
626 | #ifdef __KVM_HAVE_ARCH_WQP |
627 | return vcpu->arch.wqp; |
628 | #else |
629 | return &vcpu->wq; |
630 | #endif |
631 | } |
632 | |
633 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); |
634 | void kvm_arch_destroy_vm(struct kvm *kvm); |
635 | void kvm_free_all_assigned_devices(struct kvm *kvm); |
636 | void kvm_arch_sync_events(struct kvm *kvm); |
637 | |
638 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); |
639 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu); |
640 | |
641 | bool kvm_is_mmio_pfn(pfn_t pfn); |
642 | |
643 | struct kvm_irq_ack_notifier { |
644 | struct hlist_node link; |
645 | unsigned gsi; |
646 | void (*irq_acked)(struct kvm_irq_ack_notifier *kian); |
647 | }; |
648 | |
649 | struct kvm_assigned_dev_kernel { |
650 | struct kvm_irq_ack_notifier ack_notifier; |
651 | struct list_head list; |
652 | int assigned_dev_id; |
653 | int host_segnr; |
654 | int host_busnr; |
655 | int host_devfn; |
656 | unsigned int entries_nr; |
657 | int host_irq; |
658 | bool host_irq_disabled; |
659 | bool pci_2_3; |
660 | struct msix_entry *host_msix_entries; |
661 | int guest_irq; |
662 | struct msix_entry *guest_msix_entries; |
663 | unsigned long irq_requested_type; |
664 | int irq_source_id; |
665 | int flags; |
666 | struct pci_dev *dev; |
667 | struct kvm *kvm; |
668 | spinlock_t intx_lock; |
669 | spinlock_t intx_mask_lock; |
670 | char irq_name[32]; |
671 | struct pci_saved_state *pci_saved_state; |
672 | }; |
673 | |
674 | struct kvm_irq_mask_notifier { |
675 | void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); |
676 | int irq; |
677 | struct hlist_node link; |
678 | }; |
679 | |
680 | void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, |
681 | struct kvm_irq_mask_notifier *kimn); |
682 | void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, |
683 | struct kvm_irq_mask_notifier *kimn); |
684 | void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, |
685 | bool mask); |
686 | |
687 | #ifdef __KVM_HAVE_IOAPIC |
688 | void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, |
689 | union kvm_ioapic_redirect_entry *entry, |
690 | unsigned long *deliver_bitmask); |
691 | #endif |
692 | int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level); |
693 | int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); |
694 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, |
695 | int irq_source_id, int level); |
696 | bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); |
697 | void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); |
698 | void kvm_register_irq_ack_notifier(struct kvm *kvm, |
699 | struct kvm_irq_ack_notifier *kian); |
700 | void kvm_unregister_irq_ack_notifier(struct kvm *kvm, |
701 | struct kvm_irq_ack_notifier *kian); |
702 | int kvm_request_irq_source_id(struct kvm *kvm); |
703 | void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); |
704 | |
705 | /* For vcpu->arch.iommu_flags */ |
706 | #define KVM_IOMMU_CACHE_COHERENCY 0x1 |
707 | |
708 | #ifdef CONFIG_IOMMU_API |
709 | int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); |
710 | void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); |
711 | int kvm_iommu_map_guest(struct kvm *kvm); |
712 | int kvm_iommu_unmap_guest(struct kvm *kvm); |
713 | int kvm_assign_device(struct kvm *kvm, |
714 | struct kvm_assigned_dev_kernel *assigned_dev); |
715 | int kvm_deassign_device(struct kvm *kvm, |
716 | struct kvm_assigned_dev_kernel *assigned_dev); |
717 | #else /* CONFIG_IOMMU_API */ |
718 | static inline int kvm_iommu_map_pages(struct kvm *kvm, |
719 | struct kvm_memory_slot *slot) |
720 | { |
721 | return 0; |
722 | } |
723 | |
724 | static inline void kvm_iommu_unmap_pages(struct kvm *kvm, |
725 | struct kvm_memory_slot *slot) |
726 | { |
727 | } |
728 | |
729 | static inline int kvm_iommu_map_guest(struct kvm *kvm) |
730 | { |
731 | return -ENODEV; |
732 | } |
733 | |
734 | static inline int kvm_iommu_unmap_guest(struct kvm *kvm) |
735 | { |
736 | return 0; |
737 | } |
738 | |
739 | static inline int kvm_assign_device(struct kvm *kvm, |
740 | struct kvm_assigned_dev_kernel *assigned_dev) |
741 | { |
742 | return 0; |
743 | } |
744 | |
745 | static inline int kvm_deassign_device(struct kvm *kvm, |
746 | struct kvm_assigned_dev_kernel *assigned_dev) |
747 | { |
748 | return 0; |
749 | } |
750 | #endif /* CONFIG_IOMMU_API */ |
751 | |
752 | static inline void __guest_enter(void) |
753 | { |
754 | /* |
755 | * This is running in ioctl context so we can avoid |
756 | * the call to vtime_account() with its unnecessary idle check. |
757 | */ |
758 | vtime_account_system(current); |
759 | current->flags |= PF_VCPU; |
760 | } |
761 | |
762 | static inline void __guest_exit(void) |
763 | { |
764 | /* |
765 | * This is running in ioctl context so we can avoid |
766 | * the call to vtime_account() with its unnecessary idle check. |
767 | */ |
768 | vtime_account_system(current); |
769 | current->flags &= ~PF_VCPU; |
770 | } |
771 | |
772 | #ifdef CONFIG_CONTEXT_TRACKING |
773 | extern void guest_enter(void); |
774 | extern void guest_exit(void); |
775 | |
776 | #else /* !CONFIG_CONTEXT_TRACKING */ |
777 | static inline void guest_enter(void) |
778 | { |
779 | __guest_enter(); |
780 | } |
781 | |
782 | static inline void guest_exit(void) |
783 | { |
784 | __guest_exit(); |
785 | } |
786 | #endif /* !CONFIG_CONTEXT_TRACKING */ |
787 | |
788 | static inline void kvm_guest_enter(void) |
789 | { |
790 | unsigned long flags; |
791 | |
792 | BUG_ON(preemptible()); |
793 | |
794 | local_irq_save(flags); |
795 | guest_enter(); |
796 | local_irq_restore(flags); |
797 | |
798 | /* KVM does not hold any references to rcu protected data when it |
799 | * switches CPU into a guest mode. In fact switching to a guest mode |
800 | * is very similar to exiting to userspase from rcu point of view. In |
801 | * addition CPU may stay in a guest mode for quite a long time (up to |
802 | * one time slice). Lets treat guest mode as quiescent state, just like |
803 | * we do with user-mode execution. |
804 | */ |
805 | rcu_virt_note_context_switch(smp_processor_id()); |
806 | } |
807 | |
808 | static inline void kvm_guest_exit(void) |
809 | { |
810 | unsigned long flags; |
811 | |
812 | local_irq_save(flags); |
813 | guest_exit(); |
814 | local_irq_restore(flags); |
815 | } |
816 | |
817 | /* |
818 | * search_memslots() and __gfn_to_memslot() are here because they are |
819 | * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. |
820 | * gfn_to_memslot() itself isn't here as an inline because that would |
821 | * bloat other code too much. |
822 | */ |
823 | static inline struct kvm_memory_slot * |
824 | search_memslots(struct kvm_memslots *slots, gfn_t gfn) |
825 | { |
826 | struct kvm_memory_slot *memslot; |
827 | |
828 | kvm_for_each_memslot(memslot, slots) |
829 | if (gfn >= memslot->base_gfn && |
830 | gfn < memslot->base_gfn + memslot->npages) |
831 | return memslot; |
832 | |
833 | return NULL; |
834 | } |
835 | |
836 | static inline struct kvm_memory_slot * |
837 | __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) |
838 | { |
839 | return search_memslots(slots, gfn); |
840 | } |
841 | |
842 | static inline unsigned long |
843 | __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) |
844 | { |
845 | return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; |
846 | } |
847 | |
848 | static inline int memslot_id(struct kvm *kvm, gfn_t gfn) |
849 | { |
850 | return gfn_to_memslot(kvm, gfn)->id; |
851 | } |
852 | |
853 | static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) |
854 | { |
855 | /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */ |
856 | return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) - |
857 | (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); |
858 | } |
859 | |
860 | static inline gfn_t |
861 | hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) |
862 | { |
863 | gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; |
864 | |
865 | return slot->base_gfn + gfn_offset; |
866 | } |
867 | |
868 | static inline gpa_t gfn_to_gpa(gfn_t gfn) |
869 | { |
870 | return (gpa_t)gfn << PAGE_SHIFT; |
871 | } |
872 | |
873 | static inline gfn_t gpa_to_gfn(gpa_t gpa) |
874 | { |
875 | return (gfn_t)(gpa >> PAGE_SHIFT); |
876 | } |
877 | |
878 | static inline hpa_t pfn_to_hpa(pfn_t pfn) |
879 | { |
880 | return (hpa_t)pfn << PAGE_SHIFT; |
881 | } |
882 | |
883 | static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) |
884 | { |
885 | set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); |
886 | } |
887 | |
888 | enum kvm_stat_kind { |
889 | KVM_STAT_VM, |
890 | KVM_STAT_VCPU, |
891 | }; |
892 | |
893 | struct kvm_stats_debugfs_item { |
894 | const char *name; |
895 | int offset; |
896 | enum kvm_stat_kind kind; |
897 | struct dentry *dentry; |
898 | }; |
899 | extern struct kvm_stats_debugfs_item debugfs_entries[]; |
900 | extern struct dentry *kvm_debugfs_dir; |
901 | |
902 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
903 | static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) |
904 | { |
905 | if (unlikely(kvm->mmu_notifier_count)) |
906 | return 1; |
907 | /* |
908 | * Ensure the read of mmu_notifier_count happens before the read |
909 | * of mmu_notifier_seq. This interacts with the smp_wmb() in |
910 | * mmu_notifier_invalidate_range_end to make sure that the caller |
911 | * either sees the old (non-zero) value of mmu_notifier_count or |
912 | * the new (incremented) value of mmu_notifier_seq. |
913 | * PowerPC Book3s HV KVM calls this under a per-page lock |
914 | * rather than under kvm->mmu_lock, for scalability, so |
915 | * can't rely on kvm->mmu_lock to keep things ordered. |
916 | */ |
917 | smp_rmb(); |
918 | if (kvm->mmu_notifier_seq != mmu_seq) |
919 | return 1; |
920 | return 0; |
921 | } |
922 | #endif |
923 | |
924 | #ifdef KVM_CAP_IRQ_ROUTING |
925 | |
926 | #define KVM_MAX_IRQ_ROUTES 1024 |
927 | |
928 | int kvm_setup_default_irq_routing(struct kvm *kvm); |
929 | int kvm_set_irq_routing(struct kvm *kvm, |
930 | const struct kvm_irq_routing_entry *entries, |
931 | unsigned nr, |
932 | unsigned flags); |
933 | void kvm_free_irq_routing(struct kvm *kvm); |
934 | |
935 | int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); |
936 | |
937 | #else |
938 | |
939 | static inline void kvm_free_irq_routing(struct kvm *kvm) {} |
940 | |
941 | #endif |
942 | |
943 | #ifdef CONFIG_HAVE_KVM_EVENTFD |
944 | |
945 | void kvm_eventfd_init(struct kvm *kvm); |
946 | int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); |
947 | |
948 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
949 | int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); |
950 | void kvm_irqfd_release(struct kvm *kvm); |
951 | void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *); |
952 | #else |
953 | static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) |
954 | { |
955 | return -EINVAL; |
956 | } |
957 | |
958 | static inline void kvm_irqfd_release(struct kvm *kvm) {} |
959 | #endif |
960 | |
961 | #else |
962 | |
963 | static inline void kvm_eventfd_init(struct kvm *kvm) {} |
964 | |
965 | static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) |
966 | { |
967 | return -EINVAL; |
968 | } |
969 | |
970 | static inline void kvm_irqfd_release(struct kvm *kvm) {} |
971 | |
972 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
973 | static inline void kvm_irq_routing_update(struct kvm *kvm, |
974 | struct kvm_irq_routing_table *irq_rt) |
975 | { |
976 | rcu_assign_pointer(kvm->irq_routing, irq_rt); |
977 | } |
978 | #endif |
979 | |
980 | static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) |
981 | { |
982 | return -ENOSYS; |
983 | } |
984 | |
985 | #endif /* CONFIG_HAVE_KVM_EVENTFD */ |
986 | |
987 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
988 | static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) |
989 | { |
990 | return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; |
991 | } |
992 | |
993 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); |
994 | |
995 | #else |
996 | |
997 | static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } |
998 | |
999 | #endif |
1000 | |
1001 | #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT |
1002 | |
1003 | long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, |
1004 | unsigned long arg); |
1005 | |
1006 | #else |
1007 | |
1008 | static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, |
1009 | unsigned long arg) |
1010 | { |
1011 | return -ENOTTY; |
1012 | } |
1013 | |
1014 | #endif |
1015 | |
1016 | static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) |
1017 | { |
1018 | set_bit(req, &vcpu->requests); |
1019 | } |
1020 | |
1021 | static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) |
1022 | { |
1023 | if (test_bit(req, &vcpu->requests)) { |
1024 | clear_bit(req, &vcpu->requests); |
1025 | return true; |
1026 | } else { |
1027 | return false; |
1028 | } |
1029 | } |
1030 | |
1031 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
1032 | |
1033 | static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) |
1034 | { |
1035 | vcpu->spin_loop.in_spin_loop = val; |
1036 | } |
1037 | static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) |
1038 | { |
1039 | vcpu->spin_loop.dy_eligible = val; |
1040 | } |
1041 | |
1042 | #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ |
1043 | |
1044 | static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) |
1045 | { |
1046 | } |
1047 | |
1048 | static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) |
1049 | { |
1050 | } |
1051 | |
1052 | static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) |
1053 | { |
1054 | return true; |
1055 | } |
1056 | |
1057 | #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ |
1058 | #endif |
1059 | |
1060 |
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