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 <linux/context_tracking.h>
27 #include <asm/signal.h>
28
29 #include <linux/kvm.h>
30 #include <linux/kvm_para.h>
31
32 #include <linux/kvm_types.h>
33
34 #include <asm/kvm_host.h>
35
36 #ifndef KVM_MMIO_SIZE
37 #define KVM_MMIO_SIZE 8
38 #endif
39
40 /*
41 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
42 * in kvm, other bits are visible for userspace which are defined in
43 * include/linux/kvm_h.
44 */
45 #define KVM_MEMSLOT_INVALID (1UL << 16)
46
47 /* Two fragments for cross MMIO pages. */
48 #define KVM_MAX_MMIO_FRAGMENTS 2
49
50 /*
51 * For the normal pfn, the highest 12 bits should be zero,
52 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
53 * mask bit 63 to indicate the noslot pfn.
54 */
55 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
56 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
57 #define KVM_PFN_NOSLOT (0x1ULL << 63)
58
59 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
60 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
61 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
62
63 /*
64 * error pfns indicate that the gfn is in slot but faild to
65 * translate it to pfn on host.
66 */
is_error_pfn(pfn_t pfn)67 static inline bool is_error_pfn(pfn_t pfn)
68 {
69 return !!(pfn & KVM_PFN_ERR_MASK);
70 }
71
72 /*
73 * error_noslot pfns indicate that the gfn can not be
74 * translated to pfn - it is not in slot or failed to
75 * translate it to pfn.
76 */
is_error_noslot_pfn(pfn_t pfn)77 static inline bool is_error_noslot_pfn(pfn_t pfn)
78 {
79 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
80 }
81
82 /* noslot pfn indicates that the gfn is not in slot. */
is_noslot_pfn(pfn_t pfn)83 static inline bool is_noslot_pfn(pfn_t pfn)
84 {
85 return pfn == KVM_PFN_NOSLOT;
86 }
87
88 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
89 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
90
kvm_is_error_hva(unsigned long addr)91 static inline bool kvm_is_error_hva(unsigned long addr)
92 {
93 return addr >= PAGE_OFFSET;
94 }
95
96 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
97
is_error_page(struct page * page)98 static inline bool is_error_page(struct page *page)
99 {
100 return IS_ERR(page);
101 }
102
103 /*
104 * vcpu->requests bit members
105 */
106 #define KVM_REQ_TLB_FLUSH 0
107 #define KVM_REQ_MIGRATE_TIMER 1
108 #define KVM_REQ_REPORT_TPR_ACCESS 2
109 #define KVM_REQ_MMU_RELOAD 3
110 #define KVM_REQ_TRIPLE_FAULT 4
111 #define KVM_REQ_PENDING_TIMER 5
112 #define KVM_REQ_UNHALT 6
113 #define KVM_REQ_MMU_SYNC 7
114 #define KVM_REQ_CLOCK_UPDATE 8
115 #define KVM_REQ_KICK 9
116 #define KVM_REQ_DEACTIVATE_FPU 10
117 #define KVM_REQ_EVENT 11
118 #define KVM_REQ_APF_HALT 12
119 #define KVM_REQ_STEAL_UPDATE 13
120 #define KVM_REQ_NMI 14
121 #define KVM_REQ_PMU 15
122 #define KVM_REQ_PMI 16
123 #define KVM_REQ_WATCHDOG 17
124 #define KVM_REQ_MASTERCLOCK_UPDATE 18
125 #define KVM_REQ_MCLOCK_INPROGRESS 19
126 #define KVM_REQ_EPR_EXIT 20
127 #define KVM_REQ_SCAN_IOAPIC 21
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 extern raw_spinlock_t kvm_lock;
137 extern struct list_head vm_list;
138
139 struct kvm_io_range {
140 gpa_t addr;
141 int len;
142 struct kvm_io_device *dev;
143 };
144
145 #define NR_IOBUS_DEVS 1000
146
147 struct kvm_io_bus {
148 int dev_count;
149 struct kvm_io_range range[];
150 };
151
152 enum kvm_bus {
153 KVM_MMIO_BUS,
154 KVM_PIO_BUS,
155 KVM_VIRTIO_CCW_NOTIFY_BUS,
156 KVM_NR_BUSES
157 };
158
159 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
160 int len, const void *val);
161 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
162 void *val);
163 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
164 int len, struct kvm_io_device *dev);
165 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
166 struct kvm_io_device *dev);
167
168 #ifdef CONFIG_KVM_ASYNC_PF
169 struct kvm_async_pf {
170 struct work_struct work;
171 struct list_head link;
172 struct list_head queue;
173 struct kvm_vcpu *vcpu;
174 struct mm_struct *mm;
175 gva_t gva;
176 unsigned long addr;
177 struct kvm_arch_async_pf arch;
178 struct page *page;
179 bool done;
180 };
181
182 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
183 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
184 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
185 struct kvm_arch_async_pf *arch);
186 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
187 #endif
188
189 enum {
190 OUTSIDE_GUEST_MODE,
191 IN_GUEST_MODE,
192 EXITING_GUEST_MODE,
193 READING_SHADOW_PAGE_TABLES,
194 };
195
196 /*
197 * Sometimes a large or cross-page mmio needs to be broken up into separate
198 * exits for userspace servicing.
199 */
200 struct kvm_mmio_fragment {
201 gpa_t gpa;
202 void *data;
203 unsigned len;
204 };
205
206 struct kvm_vcpu {
207 struct kvm *kvm;
208 #ifdef CONFIG_PREEMPT_NOTIFIERS
209 struct preempt_notifier preempt_notifier;
210 #endif
211 int cpu;
212 int vcpu_id;
213 int srcu_idx;
214 int mode;
215 unsigned long requests;
216 unsigned long guest_debug;
217
218 struct mutex mutex;
219 struct kvm_run *run;
220
221 int fpu_active;
222 int guest_fpu_loaded, guest_xcr0_loaded;
223 wait_queue_head_t wq;
224 struct pid *pid;
225 int sigset_active;
226 sigset_t sigset;
227 struct kvm_vcpu_stat stat;
228
229 #ifdef CONFIG_HAS_IOMEM
230 int mmio_needed;
231 int mmio_read_completed;
232 int mmio_is_write;
233 int mmio_cur_fragment;
234 int mmio_nr_fragments;
235 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
236 #endif
237
238 #ifdef CONFIG_KVM_ASYNC_PF
239 struct {
240 u32 queued;
241 struct list_head queue;
242 struct list_head done;
243 spinlock_t lock;
244 } async_pf;
245 #endif
246
247 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
248 /*
249 * Cpu relax intercept or pause loop exit optimization
250 * in_spin_loop: set when a vcpu does a pause loop exit
251 * or cpu relax intercepted.
252 * dy_eligible: indicates whether vcpu is eligible for directed yield.
253 */
254 struct {
255 bool in_spin_loop;
256 bool dy_eligible;
257 } spin_loop;
258 #endif
259 bool preempted;
260 struct kvm_vcpu_arch arch;
261 };
262
kvm_vcpu_exiting_guest_mode(struct kvm_vcpu * vcpu)263 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
264 {
265 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
266 }
267
268 /*
269 * Some of the bitops functions do not support too long bitmaps.
270 * This number must be determined not to exceed such limits.
271 */
272 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
273
274 struct kvm_memory_slot {
275 gfn_t base_gfn;
276 unsigned long npages;
277 unsigned long *dirty_bitmap;
278 struct kvm_arch_memory_slot arch;
279 unsigned long userspace_addr;
280 u32 flags;
281 short id;
282 };
283
kvm_dirty_bitmap_bytes(struct kvm_memory_slot * memslot)284 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
285 {
286 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
287 }
288
289 struct kvm_kernel_irq_routing_entry {
290 u32 gsi;
291 u32 type;
292 int (*set)(struct kvm_kernel_irq_routing_entry *e,
293 struct kvm *kvm, int irq_source_id, int level,
294 bool line_status);
295 union {
296 struct {
297 unsigned irqchip;
298 unsigned pin;
299 } irqchip;
300 struct msi_msg msi;
301 };
302 struct hlist_node link;
303 };
304
305 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
306
307 struct kvm_irq_routing_table {
308 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
309 struct kvm_kernel_irq_routing_entry *rt_entries;
310 u32 nr_rt_entries;
311 /*
312 * Array indexed by gsi. Each entry contains list of irq chips
313 * the gsi is connected to.
314 */
315 struct hlist_head map[0];
316 };
317
318 #else
319
320 struct kvm_irq_routing_table {};
321
322 #endif
323
324 #ifndef KVM_PRIVATE_MEM_SLOTS
325 #define KVM_PRIVATE_MEM_SLOTS 0
326 #endif
327
328 #ifndef KVM_MEM_SLOTS_NUM
329 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
330 #endif
331
332 /*
333 * Note:
334 * memslots are not sorted by id anymore, please use id_to_memslot()
335 * to get the memslot by its id.
336 */
337 struct kvm_memslots {
338 u64 generation;
339 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
340 /* The mapping table from slot id to the index in memslots[]. */
341 short id_to_index[KVM_MEM_SLOTS_NUM];
342 };
343
344 struct kvm {
345 spinlock_t mmu_lock;
346 struct mutex slots_lock;
347 struct mm_struct *mm; /* userspace tied to this vm */
348 struct kvm_memslots *memslots;
349 struct srcu_struct srcu;
350 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
351 u32 bsp_vcpu_id;
352 #endif
353 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
354 atomic_t online_vcpus;
355 int last_boosted_vcpu;
356 struct list_head vm_list;
357 struct mutex lock;
358 struct kvm_io_bus *buses[KVM_NR_BUSES];
359 #ifdef CONFIG_HAVE_KVM_EVENTFD
360 struct {
361 spinlock_t lock;
362 struct list_head items;
363 struct list_head resampler_list;
364 struct mutex resampler_lock;
365 } irqfds;
366 struct list_head ioeventfds;
367 #endif
368 struct kvm_vm_stat stat;
369 struct kvm_arch arch;
370 atomic_t users_count;
371 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
372 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
373 spinlock_t ring_lock;
374 struct list_head coalesced_zones;
375 #endif
376
377 struct mutex irq_lock;
378 #ifdef CONFIG_HAVE_KVM_IRQCHIP
379 /*
380 * Update side is protected by irq_lock and,
381 * if configured, irqfds.lock.
382 */
383 struct kvm_irq_routing_table __rcu *irq_routing;
384 struct hlist_head mask_notifier_list;
385 struct hlist_head irq_ack_notifier_list;
386 #endif
387
388 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
389 struct mmu_notifier mmu_notifier;
390 unsigned long mmu_notifier_seq;
391 long mmu_notifier_count;
392 #endif
393 long tlbs_dirty;
394 struct list_head devices;
395 };
396
397 #define kvm_err(fmt, ...) \
398 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
399 #define kvm_info(fmt, ...) \
400 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
401 #define kvm_debug(fmt, ...) \
402 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
403 #define kvm_pr_unimpl(fmt, ...) \
404 pr_err_ratelimited("kvm [%i]: " fmt, \
405 task_tgid_nr(current), ## __VA_ARGS__)
406
407 /* The guest did something we don't support. */
408 #define vcpu_unimpl(vcpu, fmt, ...) \
409 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
410
kvm_get_vcpu(struct kvm * kvm,int i)411 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
412 {
413 smp_rmb();
414 return kvm->vcpus[i];
415 }
416
417 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
418 for (idx = 0; \
419 idx < atomic_read(&kvm->online_vcpus) && \
420 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
421 idx++)
422
423 #define kvm_for_each_memslot(memslot, slots) \
424 for (memslot = &slots->memslots[0]; \
425 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
426 memslot++)
427
428 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
429 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
430
431 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
432 void vcpu_put(struct kvm_vcpu *vcpu);
433
434 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
435 int kvm_irqfd_init(void);
436 void kvm_irqfd_exit(void);
437 #else
kvm_irqfd_init(void)438 static inline int kvm_irqfd_init(void)
439 {
440 return 0;
441 }
442
kvm_irqfd_exit(void)443 static inline void kvm_irqfd_exit(void)
444 {
445 }
446 #endif
447 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
448 struct module *module);
449 void kvm_exit(void);
450
451 void kvm_get_kvm(struct kvm *kvm);
452 void kvm_put_kvm(struct kvm *kvm);
453 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
454 u64 last_generation);
455
kvm_memslots(struct kvm * kvm)456 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
457 {
458 return rcu_dereference_check(kvm->memslots,
459 srcu_read_lock_held(&kvm->srcu)
460 || lockdep_is_held(&kvm->slots_lock));
461 }
462
463 static inline struct kvm_memory_slot *
id_to_memslot(struct kvm_memslots * slots,int id)464 id_to_memslot(struct kvm_memslots *slots, int id)
465 {
466 int index = slots->id_to_index[id];
467 struct kvm_memory_slot *slot;
468
469 slot = &slots->memslots[index];
470
471 WARN_ON(slot->id != id);
472 return slot;
473 }
474
475 /*
476 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
477 * - create a new memory slot
478 * - delete an existing memory slot
479 * - modify an existing memory slot
480 * -- move it in the guest physical memory space
481 * -- just change its flags
482 *
483 * Since flags can be changed by some of these operations, the following
484 * differentiation is the best we can do for __kvm_set_memory_region():
485 */
486 enum kvm_mr_change {
487 KVM_MR_CREATE,
488 KVM_MR_DELETE,
489 KVM_MR_MOVE,
490 KVM_MR_FLAGS_ONLY,
491 };
492
493 int kvm_set_memory_region(struct kvm *kvm,
494 struct kvm_userspace_memory_region *mem);
495 int __kvm_set_memory_region(struct kvm *kvm,
496 struct kvm_userspace_memory_region *mem);
497 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
498 struct kvm_memory_slot *dont);
499 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
500 int kvm_arch_prepare_memory_region(struct kvm *kvm,
501 struct kvm_memory_slot *memslot,
502 struct kvm_userspace_memory_region *mem,
503 enum kvm_mr_change change);
504 void kvm_arch_commit_memory_region(struct kvm *kvm,
505 struct kvm_userspace_memory_region *mem,
506 const struct kvm_memory_slot *old,
507 enum kvm_mr_change change);
508 bool kvm_largepages_enabled(void);
509 void kvm_disable_largepages(void);
510 /* flush all memory translations */
511 void kvm_arch_flush_shadow_all(struct kvm *kvm);
512 /* flush memory translations pointing to 'slot' */
513 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
514 struct kvm_memory_slot *slot);
515
516 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
517 int nr_pages);
518
519 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
520 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
521 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
522 void kvm_release_page_clean(struct page *page);
523 void kvm_release_page_dirty(struct page *page);
524 void kvm_set_page_dirty(struct page *page);
525 void kvm_set_page_accessed(struct page *page);
526
527 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
528 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
529 bool write_fault, bool *writable);
530 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
531 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
532 bool *writable);
533 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
534 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
535
536 void kvm_release_pfn_dirty(pfn_t pfn);
537 void kvm_release_pfn_clean(pfn_t pfn);
538 void kvm_set_pfn_dirty(pfn_t pfn);
539 void kvm_set_pfn_accessed(pfn_t pfn);
540 void kvm_get_pfn(pfn_t pfn);
541
542 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
543 int len);
544 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
545 unsigned long len);
546 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
547 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
548 void *data, unsigned long len);
549 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
550 int offset, int len);
551 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
552 unsigned long len);
553 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
554 void *data, unsigned long len);
555 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
556 gpa_t gpa, unsigned long len);
557 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
558 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
559 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
560 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
561 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
562 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
563 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
564 gfn_t gfn);
565
566 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
567 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
568 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
569 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
570 void kvm_resched(struct kvm_vcpu *vcpu);
571 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
572 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
573
574 void kvm_flush_remote_tlbs(struct kvm *kvm);
575 void kvm_reload_remote_mmus(struct kvm *kvm);
576 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
577 void kvm_make_scan_ioapic_request(struct kvm *kvm);
578
579 long kvm_arch_dev_ioctl(struct file *filp,
580 unsigned int ioctl, unsigned long arg);
581 long kvm_arch_vcpu_ioctl(struct file *filp,
582 unsigned int ioctl, unsigned long arg);
583 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
584
585 int kvm_dev_ioctl_check_extension(long ext);
586
587 int kvm_get_dirty_log(struct kvm *kvm,
588 struct kvm_dirty_log *log, int *is_dirty);
589 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
590 struct kvm_dirty_log *log);
591
592 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
593 struct kvm_userspace_memory_region *mem);
594 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
595 bool line_status);
596 long kvm_arch_vm_ioctl(struct file *filp,
597 unsigned int ioctl, unsigned long arg);
598
599 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
600 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
601
602 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
603 struct kvm_translation *tr);
604
605 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
606 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
607 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
608 struct kvm_sregs *sregs);
609 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
610 struct kvm_sregs *sregs);
611 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
612 struct kvm_mp_state *mp_state);
613 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
614 struct kvm_mp_state *mp_state);
615 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
616 struct kvm_guest_debug *dbg);
617 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
618
619 int kvm_arch_init(void *opaque);
620 void kvm_arch_exit(void);
621
622 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
623 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
624
625 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
626 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
627 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
628 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
629 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
630 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
631 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
632
633 int kvm_arch_hardware_enable(void *garbage);
634 void kvm_arch_hardware_disable(void *garbage);
635 int kvm_arch_hardware_setup(void);
636 void kvm_arch_hardware_unsetup(void);
637 void kvm_arch_check_processor_compat(void *rtn);
638 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
639 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
640
641 void kvm_free_physmem(struct kvm *kvm);
642
643 void *kvm_kvzalloc(unsigned long size);
644 void kvm_kvfree(const void *addr);
645
646 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
kvm_arch_alloc_vm(void)647 static inline struct kvm *kvm_arch_alloc_vm(void)
648 {
649 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
650 }
651
kvm_arch_free_vm(struct kvm * kvm)652 static inline void kvm_arch_free_vm(struct kvm *kvm)
653 {
654 kfree(kvm);
655 }
656 #endif
657
kvm_arch_vcpu_wq(struct kvm_vcpu * vcpu)658 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
659 {
660 #ifdef __KVM_HAVE_ARCH_WQP
661 return vcpu->arch.wqp;
662 #else
663 return &vcpu->wq;
664 #endif
665 }
666
667 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
668 void kvm_arch_destroy_vm(struct kvm *kvm);
669 void kvm_arch_sync_events(struct kvm *kvm);
670
671 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
672 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
673
674 bool kvm_is_mmio_pfn(pfn_t pfn);
675
676 struct kvm_irq_ack_notifier {
677 struct hlist_node link;
678 unsigned gsi;
679 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
680 };
681
682 struct kvm_assigned_dev_kernel {
683 struct kvm_irq_ack_notifier ack_notifier;
684 struct list_head list;
685 int assigned_dev_id;
686 int host_segnr;
687 int host_busnr;
688 int host_devfn;
689 unsigned int entries_nr;
690 int host_irq;
691 bool host_irq_disabled;
692 bool pci_2_3;
693 struct msix_entry *host_msix_entries;
694 int guest_irq;
695 struct msix_entry *guest_msix_entries;
696 unsigned long irq_requested_type;
697 int irq_source_id;
698 int flags;
699 struct pci_dev *dev;
700 struct kvm *kvm;
701 spinlock_t intx_lock;
702 spinlock_t intx_mask_lock;
703 char irq_name[32];
704 struct pci_saved_state *pci_saved_state;
705 };
706
707 struct kvm_irq_mask_notifier {
708 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
709 int irq;
710 struct hlist_node link;
711 };
712
713 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
714 struct kvm_irq_mask_notifier *kimn);
715 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
716 struct kvm_irq_mask_notifier *kimn);
717 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
718 bool mask);
719
720 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
721 bool line_status);
722 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
723 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
724 int irq_source_id, int level, bool line_status);
725 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
726 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
727 void kvm_register_irq_ack_notifier(struct kvm *kvm,
728 struct kvm_irq_ack_notifier *kian);
729 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
730 struct kvm_irq_ack_notifier *kian);
731 int kvm_request_irq_source_id(struct kvm *kvm);
732 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
733
734 /* For vcpu->arch.iommu_flags */
735 #define KVM_IOMMU_CACHE_COHERENCY 0x1
736
737 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
738 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
739 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
740 int kvm_iommu_map_guest(struct kvm *kvm);
741 int kvm_iommu_unmap_guest(struct kvm *kvm);
742 int kvm_assign_device(struct kvm *kvm,
743 struct kvm_assigned_dev_kernel *assigned_dev);
744 int kvm_deassign_device(struct kvm *kvm,
745 struct kvm_assigned_dev_kernel *assigned_dev);
746 #else
kvm_iommu_map_pages(struct kvm * kvm,struct kvm_memory_slot * slot)747 static inline int kvm_iommu_map_pages(struct kvm *kvm,
748 struct kvm_memory_slot *slot)
749 {
750 return 0;
751 }
752
kvm_iommu_unmap_pages(struct kvm * kvm,struct kvm_memory_slot * slot)753 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
754 struct kvm_memory_slot *slot)
755 {
756 }
757
kvm_iommu_unmap_guest(struct kvm * kvm)758 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
759 {
760 return 0;
761 }
762 #endif
763
kvm_guest_enter(void)764 static inline void kvm_guest_enter(void)
765 {
766 unsigned long flags;
767
768 BUG_ON(preemptible());
769
770 local_irq_save(flags);
771 guest_enter();
772 local_irq_restore(flags);
773
774 /* KVM does not hold any references to rcu protected data when it
775 * switches CPU into a guest mode. In fact switching to a guest mode
776 * is very similar to exiting to userspase from rcu point of view. In
777 * addition CPU may stay in a guest mode for quite a long time (up to
778 * one time slice). Lets treat guest mode as quiescent state, just like
779 * we do with user-mode execution.
780 */
781 rcu_virt_note_context_switch(smp_processor_id());
782 }
783
kvm_guest_exit(void)784 static inline void kvm_guest_exit(void)
785 {
786 unsigned long flags;
787
788 local_irq_save(flags);
789 guest_exit();
790 local_irq_restore(flags);
791 }
792
793 /*
794 * search_memslots() and __gfn_to_memslot() are here because they are
795 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
796 * gfn_to_memslot() itself isn't here as an inline because that would
797 * bloat other code too much.
798 */
799 static inline struct kvm_memory_slot *
search_memslots(struct kvm_memslots * slots,gfn_t gfn)800 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
801 {
802 struct kvm_memory_slot *memslot;
803
804 kvm_for_each_memslot(memslot, slots)
805 if (gfn >= memslot->base_gfn &&
806 gfn < memslot->base_gfn + memslot->npages)
807 return memslot;
808
809 return NULL;
810 }
811
812 static inline struct kvm_memory_slot *
__gfn_to_memslot(struct kvm_memslots * slots,gfn_t gfn)813 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
814 {
815 return search_memslots(slots, gfn);
816 }
817
818 static inline unsigned long
__gfn_to_hva_memslot(struct kvm_memory_slot * slot,gfn_t gfn)819 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
820 {
821 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
822 }
823
memslot_id(struct kvm * kvm,gfn_t gfn)824 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
825 {
826 return gfn_to_memslot(kvm, gfn)->id;
827 }
828
gfn_to_index(gfn_t gfn,gfn_t base_gfn,int level)829 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
830 {
831 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
832 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
833 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
834 }
835
836 static inline gfn_t
hva_to_gfn_memslot(unsigned long hva,struct kvm_memory_slot * slot)837 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
838 {
839 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
840
841 return slot->base_gfn + gfn_offset;
842 }
843
gfn_to_gpa(gfn_t gfn)844 static inline gpa_t gfn_to_gpa(gfn_t gfn)
845 {
846 return (gpa_t)gfn << PAGE_SHIFT;
847 }
848
gpa_to_gfn(gpa_t gpa)849 static inline gfn_t gpa_to_gfn(gpa_t gpa)
850 {
851 return (gfn_t)(gpa >> PAGE_SHIFT);
852 }
853
pfn_to_hpa(pfn_t pfn)854 static inline hpa_t pfn_to_hpa(pfn_t pfn)
855 {
856 return (hpa_t)pfn << PAGE_SHIFT;
857 }
858
kvm_migrate_timers(struct kvm_vcpu * vcpu)859 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
860 {
861 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
862 }
863
864 enum kvm_stat_kind {
865 KVM_STAT_VM,
866 KVM_STAT_VCPU,
867 };
868
869 struct kvm_stats_debugfs_item {
870 const char *name;
871 int offset;
872 enum kvm_stat_kind kind;
873 struct dentry *dentry;
874 };
875 extern struct kvm_stats_debugfs_item debugfs_entries[];
876 extern struct dentry *kvm_debugfs_dir;
877
878 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
mmu_notifier_retry(struct kvm * kvm,unsigned long mmu_seq)879 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
880 {
881 if (unlikely(kvm->mmu_notifier_count))
882 return 1;
883 /*
884 * Ensure the read of mmu_notifier_count happens before the read
885 * of mmu_notifier_seq. This interacts with the smp_wmb() in
886 * mmu_notifier_invalidate_range_end to make sure that the caller
887 * either sees the old (non-zero) value of mmu_notifier_count or
888 * the new (incremented) value of mmu_notifier_seq.
889 * PowerPC Book3s HV KVM calls this under a per-page lock
890 * rather than under kvm->mmu_lock, for scalability, so
891 * can't rely on kvm->mmu_lock to keep things ordered.
892 */
893 smp_rmb();
894 if (kvm->mmu_notifier_seq != mmu_seq)
895 return 1;
896 return 0;
897 }
898 #endif
899
900 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
901
902 #define KVM_MAX_IRQ_ROUTES 1024
903
904 int kvm_setup_default_irq_routing(struct kvm *kvm);
905 int kvm_set_irq_routing(struct kvm *kvm,
906 const struct kvm_irq_routing_entry *entries,
907 unsigned nr,
908 unsigned flags);
909 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
910 struct kvm_kernel_irq_routing_entry *e,
911 const struct kvm_irq_routing_entry *ue);
912 void kvm_free_irq_routing(struct kvm *kvm);
913
914 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
915
916 #else
917
kvm_free_irq_routing(struct kvm * kvm)918 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
919
920 #endif
921
922 #ifdef CONFIG_HAVE_KVM_EVENTFD
923
924 void kvm_eventfd_init(struct kvm *kvm);
925 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
926
927 #ifdef CONFIG_HAVE_KVM_IRQCHIP
928 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
929 void kvm_irqfd_release(struct kvm *kvm);
930 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
931 #else
kvm_irqfd(struct kvm * kvm,struct kvm_irqfd * args)932 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
933 {
934 return -EINVAL;
935 }
936
kvm_irqfd_release(struct kvm * kvm)937 static inline void kvm_irqfd_release(struct kvm *kvm) {}
938 #endif
939
940 #else
941
kvm_eventfd_init(struct kvm * kvm)942 static inline void kvm_eventfd_init(struct kvm *kvm) {}
943
kvm_irqfd(struct kvm * kvm,struct kvm_irqfd * args)944 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
945 {
946 return -EINVAL;
947 }
948
kvm_irqfd_release(struct kvm * kvm)949 static inline void kvm_irqfd_release(struct kvm *kvm) {}
950
951 #ifdef CONFIG_HAVE_KVM_IRQCHIP
kvm_irq_routing_update(struct kvm * kvm,struct kvm_irq_routing_table * irq_rt)952 static inline void kvm_irq_routing_update(struct kvm *kvm,
953 struct kvm_irq_routing_table *irq_rt)
954 {
955 rcu_assign_pointer(kvm->irq_routing, irq_rt);
956 }
957 #endif
958
kvm_ioeventfd(struct kvm * kvm,struct kvm_ioeventfd * args)959 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
960 {
961 return -ENOSYS;
962 }
963
964 #endif /* CONFIG_HAVE_KVM_EVENTFD */
965
966 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
kvm_vcpu_is_bsp(struct kvm_vcpu * vcpu)967 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
968 {
969 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
970 }
971
972 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
973
974 #else
975
kvm_vcpu_compatible(struct kvm_vcpu * vcpu)976 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
977
978 #endif
979
980 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
981
982 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
983 unsigned long arg);
984
985 void kvm_free_all_assigned_devices(struct kvm *kvm);
986
987 #else
988
kvm_vm_ioctl_assigned_device(struct kvm * kvm,unsigned ioctl,unsigned long arg)989 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
990 unsigned long arg)
991 {
992 return -ENOTTY;
993 }
994
kvm_free_all_assigned_devices(struct kvm * kvm)995 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
996
997 #endif
998
kvm_make_request(int req,struct kvm_vcpu * vcpu)999 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1000 {
1001 set_bit(req, &vcpu->requests);
1002 }
1003
kvm_check_request(int req,struct kvm_vcpu * vcpu)1004 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1005 {
1006 if (test_bit(req, &vcpu->requests)) {
1007 clear_bit(req, &vcpu->requests);
1008 return true;
1009 } else {
1010 return false;
1011 }
1012 }
1013
1014 extern bool kvm_rebooting;
1015
1016 struct kvm_device_ops;
1017
1018 struct kvm_device {
1019 struct kvm_device_ops *ops;
1020 struct kvm *kvm;
1021 void *private;
1022 struct list_head vm_node;
1023 };
1024
1025 /* create, destroy, and name are mandatory */
1026 struct kvm_device_ops {
1027 const char *name;
1028 int (*create)(struct kvm_device *dev, u32 type);
1029
1030 /*
1031 * Destroy is responsible for freeing dev.
1032 *
1033 * Destroy may be called before or after destructors are called
1034 * on emulated I/O regions, depending on whether a reference is
1035 * held by a vcpu or other kvm component that gets destroyed
1036 * after the emulated I/O.
1037 */
1038 void (*destroy)(struct kvm_device *dev);
1039
1040 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1041 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1042 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1043 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1044 unsigned long arg);
1045 };
1046
1047 void kvm_device_get(struct kvm_device *dev);
1048 void kvm_device_put(struct kvm_device *dev);
1049 struct kvm_device *kvm_device_from_filp(struct file *filp);
1050
1051 extern struct kvm_device_ops kvm_mpic_ops;
1052 extern struct kvm_device_ops kvm_xics_ops;
1053
1054 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1055
kvm_vcpu_set_in_spin_loop(struct kvm_vcpu * vcpu,bool val)1056 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1057 {
1058 vcpu->spin_loop.in_spin_loop = val;
1059 }
kvm_vcpu_set_dy_eligible(struct kvm_vcpu * vcpu,bool val)1060 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1061 {
1062 vcpu->spin_loop.dy_eligible = val;
1063 }
1064
1065 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1066
kvm_vcpu_set_in_spin_loop(struct kvm_vcpu * vcpu,bool val)1067 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1068 {
1069 }
1070
kvm_vcpu_set_dy_eligible(struct kvm_vcpu * vcpu,bool val)1071 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1072 {
1073 }
1074
kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu * vcpu)1075 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1076 {
1077 return true;
1078 }
1079
1080 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1081 #endif
1082
1083