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 <asm/signal.h>
25
26 #include <linux/kvm.h>
27 #include <linux/kvm_para.h>
28
29 #include <linux/kvm_types.h>
30
31 #include <asm/kvm_host.h>
32
33 #ifndef KVM_MMIO_SIZE
34 #define KVM_MMIO_SIZE 8
35 #endif
36
37 /*
38 * vcpu->requests bit members
39 */
40 #define KVM_REQ_TLB_FLUSH 0
41 #define KVM_REQ_MIGRATE_TIMER 1
42 #define KVM_REQ_REPORT_TPR_ACCESS 2
43 #define KVM_REQ_MMU_RELOAD 3
44 #define KVM_REQ_TRIPLE_FAULT 4
45 #define KVM_REQ_PENDING_TIMER 5
46 #define KVM_REQ_UNHALT 6
47 #define KVM_REQ_MMU_SYNC 7
48 #define KVM_REQ_CLOCK_UPDATE 8
49 #define KVM_REQ_KICK 9
50 #define KVM_REQ_DEACTIVATE_FPU 10
51 #define KVM_REQ_EVENT 11
52 #define KVM_REQ_APF_HALT 12
53 #define KVM_REQ_STEAL_UPDATE 13
54 #define KVM_REQ_NMI 14
55 #define KVM_REQ_IMMEDIATE_EXIT 15
56 #define KVM_REQ_PMU 16
57 #define KVM_REQ_PMI 17
58
59 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
60
61 struct kvm;
62 struct kvm_vcpu;
63 extern struct kmem_cache *kvm_vcpu_cache;
64
65 struct kvm_io_range {
66 gpa_t addr;
67 int len;
68 struct kvm_io_device *dev;
69 };
70
71 struct kvm_io_bus {
72 int dev_count;
73 #define NR_IOBUS_DEVS 300
74 struct kvm_io_range range[NR_IOBUS_DEVS];
75 };
76
77 enum kvm_bus {
78 KVM_MMIO_BUS,
79 KVM_PIO_BUS,
80 KVM_NR_BUSES
81 };
82
83 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
84 int len, const void *val);
85 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
86 void *val);
87 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
88 int len, struct kvm_io_device *dev);
89 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
90 struct kvm_io_device *dev);
91
92 #ifdef CONFIG_KVM_ASYNC_PF
93 struct kvm_async_pf {
94 struct work_struct work;
95 struct list_head link;
96 struct list_head queue;
97 struct kvm_vcpu *vcpu;
98 struct mm_struct *mm;
99 gva_t gva;
100 unsigned long addr;
101 struct kvm_arch_async_pf arch;
102 struct page *page;
103 bool done;
104 };
105
106 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
107 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
108 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
109 struct kvm_arch_async_pf *arch);
110 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
111 #endif
112
113 enum {
114 OUTSIDE_GUEST_MODE,
115 IN_GUEST_MODE,
116 EXITING_GUEST_MODE
117 };
118
119 struct kvm_vcpu {
120 struct kvm *kvm;
121 #ifdef CONFIG_PREEMPT_NOTIFIERS
122 struct preempt_notifier preempt_notifier;
123 #endif
124 int cpu;
125 int vcpu_id;
126 int srcu_idx;
127 int mode;
128 unsigned long requests;
129 unsigned long guest_debug;
130
131 struct mutex mutex;
132 struct kvm_run *run;
133
134 int fpu_active;
135 int guest_fpu_loaded, guest_xcr0_loaded;
136 wait_queue_head_t wq;
137 struct pid *pid;
138 int sigset_active;
139 sigset_t sigset;
140 struct kvm_vcpu_stat stat;
141
142 #ifdef CONFIG_HAS_IOMEM
143 int mmio_needed;
144 int mmio_read_completed;
145 int mmio_is_write;
146 int mmio_size;
147 int mmio_index;
148 unsigned char mmio_data[KVM_MMIO_SIZE];
149 gpa_t mmio_phys_addr;
150 #endif
151
152 #ifdef CONFIG_KVM_ASYNC_PF
153 struct {
154 u32 queued;
155 struct list_head queue;
156 struct list_head done;
157 spinlock_t lock;
158 } async_pf;
159 #endif
160
161 struct kvm_vcpu_arch arch;
162 };
163
kvm_vcpu_exiting_guest_mode(struct kvm_vcpu * vcpu)164 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
165 {
166 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
167 }
168
169 /*
170 * Some of the bitops functions do not support too long bitmaps.
171 * This number must be determined not to exceed such limits.
172 */
173 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
174
175 struct kvm_memory_slot {
176 gfn_t base_gfn;
177 unsigned long npages;
178 unsigned long flags;
179 unsigned long *rmap;
180 unsigned long *dirty_bitmap;
181 unsigned long *dirty_bitmap_head;
182 unsigned long nr_dirty_pages;
183 struct kvm_arch_memory_slot arch;
184 unsigned long userspace_addr;
185 int user_alloc;
186 int id;
187 };
188
kvm_dirty_bitmap_bytes(struct kvm_memory_slot * memslot)189 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
190 {
191 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
192 }
193
194 struct kvm_kernel_irq_routing_entry {
195 u32 gsi;
196 u32 type;
197 int (*set)(struct kvm_kernel_irq_routing_entry *e,
198 struct kvm *kvm, int irq_source_id, int level);
199 union {
200 struct {
201 unsigned irqchip;
202 unsigned pin;
203 } irqchip;
204 struct msi_msg msi;
205 };
206 struct hlist_node link;
207 };
208
209 #ifdef __KVM_HAVE_IOAPIC
210
211 struct kvm_irq_routing_table {
212 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
213 struct kvm_kernel_irq_routing_entry *rt_entries;
214 u32 nr_rt_entries;
215 /*
216 * Array indexed by gsi. Each entry contains list of irq chips
217 * the gsi is connected to.
218 */
219 struct hlist_head map[0];
220 };
221
222 #else
223
224 struct kvm_irq_routing_table {};
225
226 #endif
227
228 #ifndef KVM_MEM_SLOTS_NUM
229 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
230 #endif
231
232 /*
233 * Note:
234 * memslots are not sorted by id anymore, please use id_to_memslot()
235 * to get the memslot by its id.
236 */
237 struct kvm_memslots {
238 u64 generation;
239 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
240 /* The mapping table from slot id to the index in memslots[]. */
241 int id_to_index[KVM_MEM_SLOTS_NUM];
242 };
243
244 struct kvm {
245 spinlock_t mmu_lock;
246 struct mutex slots_lock;
247 struct mm_struct *mm; /* userspace tied to this vm */
248 struct kvm_memslots *memslots;
249 struct srcu_struct srcu;
250 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
251 u32 bsp_vcpu_id;
252 #endif
253 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
254 atomic_t online_vcpus;
255 int last_boosted_vcpu;
256 struct list_head vm_list;
257 struct mutex lock;
258 struct kvm_io_bus *buses[KVM_NR_BUSES];
259 #ifdef CONFIG_HAVE_KVM_EVENTFD
260 struct {
261 spinlock_t lock;
262 struct list_head items;
263 } irqfds;
264 struct list_head ioeventfds;
265 #endif
266 struct kvm_vm_stat stat;
267 struct kvm_arch arch;
268 atomic_t users_count;
269 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
270 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
271 spinlock_t ring_lock;
272 struct list_head coalesced_zones;
273 #endif
274
275 struct mutex irq_lock;
276 #ifdef CONFIG_HAVE_KVM_IRQCHIP
277 /*
278 * Update side is protected by irq_lock and,
279 * if configured, irqfds.lock.
280 */
281 struct kvm_irq_routing_table __rcu *irq_routing;
282 struct hlist_head mask_notifier_list;
283 struct hlist_head irq_ack_notifier_list;
284 #endif
285
286 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
287 struct mmu_notifier mmu_notifier;
288 unsigned long mmu_notifier_seq;
289 long mmu_notifier_count;
290 #endif
291 long tlbs_dirty;
292 };
293
294 /* The guest did something we don't support. */
295 #define pr_unimpl(vcpu, fmt, ...) \
296 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
297 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
298
299 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
300 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
301
kvm_get_vcpu(struct kvm * kvm,int i)302 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
303 {
304 smp_rmb();
305 return kvm->vcpus[i];
306 }
307
308 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
309 for (idx = 0; \
310 idx < atomic_read(&kvm->online_vcpus) && \
311 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
312 idx++)
313
314 #define kvm_for_each_memslot(memslot, slots) \
315 for (memslot = &slots->memslots[0]; \
316 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
317 memslot++)
318
319 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
320 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
321
322 void vcpu_load(struct kvm_vcpu *vcpu);
323 void vcpu_put(struct kvm_vcpu *vcpu);
324
325 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
326 struct module *module);
327 void kvm_exit(void);
328
329 void kvm_get_kvm(struct kvm *kvm);
330 void kvm_put_kvm(struct kvm *kvm);
331 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
332
kvm_memslots(struct kvm * kvm)333 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
334 {
335 return rcu_dereference_check(kvm->memslots,
336 srcu_read_lock_held(&kvm->srcu)
337 || lockdep_is_held(&kvm->slots_lock));
338 }
339
340 static inline struct kvm_memory_slot *
id_to_memslot(struct kvm_memslots * slots,int id)341 id_to_memslot(struct kvm_memslots *slots, int id)
342 {
343 int index = slots->id_to_index[id];
344 struct kvm_memory_slot *slot;
345
346 slot = &slots->memslots[index];
347
348 WARN_ON(slot->id != id);
349 return slot;
350 }
351
352 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
353 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
is_error_hpa(hpa_t hpa)354 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
355
356 extern struct page *bad_page;
357 extern struct page *fault_page;
358
359 extern pfn_t bad_pfn;
360 extern pfn_t fault_pfn;
361
362 int is_error_page(struct page *page);
363 int is_error_pfn(pfn_t pfn);
364 int is_hwpoison_pfn(pfn_t pfn);
365 int is_fault_pfn(pfn_t pfn);
366 int is_noslot_pfn(pfn_t pfn);
367 int is_invalid_pfn(pfn_t pfn);
368 int kvm_is_error_hva(unsigned long addr);
369 int kvm_set_memory_region(struct kvm *kvm,
370 struct kvm_userspace_memory_region *mem,
371 int user_alloc);
372 int __kvm_set_memory_region(struct kvm *kvm,
373 struct kvm_userspace_memory_region *mem,
374 int user_alloc);
375 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
376 struct kvm_memory_slot *dont);
377 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
378 int kvm_arch_prepare_memory_region(struct kvm *kvm,
379 struct kvm_memory_slot *memslot,
380 struct kvm_memory_slot old,
381 struct kvm_userspace_memory_region *mem,
382 int user_alloc);
383 void kvm_arch_commit_memory_region(struct kvm *kvm,
384 struct kvm_userspace_memory_region *mem,
385 struct kvm_memory_slot old,
386 int user_alloc);
387 bool kvm_largepages_enabled(void);
388 void kvm_disable_largepages(void);
389 void kvm_arch_flush_shadow(struct kvm *kvm);
390
391 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
392 int nr_pages);
393
394 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
395 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
396 void kvm_release_page_clean(struct page *page);
397 void kvm_release_page_dirty(struct page *page);
398 void kvm_set_page_dirty(struct page *page);
399 void kvm_set_page_accessed(struct page *page);
400
401 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
402 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
403 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
404 bool write_fault, bool *writable);
405 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
406 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
407 bool *writable);
408 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
409 struct kvm_memory_slot *slot, gfn_t gfn);
410 void kvm_release_pfn_dirty(pfn_t);
411 void kvm_release_pfn_clean(pfn_t pfn);
412 void kvm_set_pfn_dirty(pfn_t pfn);
413 void kvm_set_pfn_accessed(pfn_t pfn);
414 void kvm_get_pfn(pfn_t pfn);
415
416 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
417 int len);
418 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
419 unsigned long len);
420 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
421 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
422 void *data, unsigned long len);
423 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
424 int offset, int len);
425 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
426 unsigned long len);
427 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
428 void *data, unsigned long len);
429 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
430 gpa_t gpa, unsigned long len);
431 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
432 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
433 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
434 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
435 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
436 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
437 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
438 gfn_t gfn);
439
440 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
441 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
442 void kvm_resched(struct kvm_vcpu *vcpu);
443 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
444 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
445
446 void kvm_flush_remote_tlbs(struct kvm *kvm);
447 void kvm_reload_remote_mmus(struct kvm *kvm);
448
449 long kvm_arch_dev_ioctl(struct file *filp,
450 unsigned int ioctl, unsigned long arg);
451 long kvm_arch_vcpu_ioctl(struct file *filp,
452 unsigned int ioctl, unsigned long arg);
453 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
454
455 int kvm_dev_ioctl_check_extension(long ext);
456
457 int kvm_get_dirty_log(struct kvm *kvm,
458 struct kvm_dirty_log *log, int *is_dirty);
459 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
460 struct kvm_dirty_log *log);
461
462 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
463 struct
464 kvm_userspace_memory_region *mem,
465 int user_alloc);
466 long kvm_arch_vm_ioctl(struct file *filp,
467 unsigned int ioctl, unsigned long arg);
468
469 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
470 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
471
472 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
473 struct kvm_translation *tr);
474
475 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
476 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
477 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
478 struct kvm_sregs *sregs);
479 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
480 struct kvm_sregs *sregs);
481 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
482 struct kvm_mp_state *mp_state);
483 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
484 struct kvm_mp_state *mp_state);
485 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
486 struct kvm_guest_debug *dbg);
487 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
488
489 int kvm_arch_init(void *opaque);
490 void kvm_arch_exit(void);
491
492 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
493 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
494
495 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
496 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
497 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
498 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
499 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
500 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
501
502 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
503 int kvm_arch_hardware_enable(void *garbage);
504 void kvm_arch_hardware_disable(void *garbage);
505 int kvm_arch_hardware_setup(void);
506 void kvm_arch_hardware_unsetup(void);
507 void kvm_arch_check_processor_compat(void *rtn);
508 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
509
510 void kvm_free_physmem(struct kvm *kvm);
511
512 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
kvm_arch_alloc_vm(void)513 static inline struct kvm *kvm_arch_alloc_vm(void)
514 {
515 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
516 }
517
kvm_arch_free_vm(struct kvm * kvm)518 static inline void kvm_arch_free_vm(struct kvm *kvm)
519 {
520 kfree(kvm);
521 }
522 #endif
523
524 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
525 void kvm_arch_destroy_vm(struct kvm *kvm);
526 void kvm_free_all_assigned_devices(struct kvm *kvm);
527 void kvm_arch_sync_events(struct kvm *kvm);
528
529 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
530 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
531
532 int kvm_is_mmio_pfn(pfn_t pfn);
533
534 struct kvm_irq_ack_notifier {
535 struct hlist_node link;
536 unsigned gsi;
537 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
538 };
539
540 struct kvm_assigned_dev_kernel {
541 struct kvm_irq_ack_notifier ack_notifier;
542 struct list_head list;
543 int assigned_dev_id;
544 int host_segnr;
545 int host_busnr;
546 int host_devfn;
547 unsigned int entries_nr;
548 int host_irq;
549 bool host_irq_disabled;
550 bool pci_2_3;
551 struct msix_entry *host_msix_entries;
552 int guest_irq;
553 struct msix_entry *guest_msix_entries;
554 unsigned long irq_requested_type;
555 int irq_source_id;
556 int flags;
557 struct pci_dev *dev;
558 struct kvm *kvm;
559 spinlock_t intx_lock;
560 spinlock_t intx_mask_lock;
561 char irq_name[32];
562 struct pci_saved_state *pci_saved_state;
563 };
564
565 struct kvm_irq_mask_notifier {
566 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
567 int irq;
568 struct hlist_node link;
569 };
570
571 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
572 struct kvm_irq_mask_notifier *kimn);
573 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
574 struct kvm_irq_mask_notifier *kimn);
575 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
576 bool mask);
577
578 #ifdef __KVM_HAVE_IOAPIC
579 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
580 union kvm_ioapic_redirect_entry *entry,
581 unsigned long *deliver_bitmask);
582 #endif
583 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
584 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
585 int irq_source_id, int level);
586 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
587 void kvm_register_irq_ack_notifier(struct kvm *kvm,
588 struct kvm_irq_ack_notifier *kian);
589 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
590 struct kvm_irq_ack_notifier *kian);
591 int kvm_request_irq_source_id(struct kvm *kvm);
592 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
593
594 /* For vcpu->arch.iommu_flags */
595 #define KVM_IOMMU_CACHE_COHERENCY 0x1
596
597 #ifdef CONFIG_IOMMU_API
598 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
599 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
600 int kvm_iommu_map_guest(struct kvm *kvm);
601 int kvm_iommu_unmap_guest(struct kvm *kvm);
602 int kvm_assign_device(struct kvm *kvm,
603 struct kvm_assigned_dev_kernel *assigned_dev);
604 int kvm_deassign_device(struct kvm *kvm,
605 struct kvm_assigned_dev_kernel *assigned_dev);
606 #else /* CONFIG_IOMMU_API */
kvm_iommu_map_pages(struct kvm * kvm,struct kvm_memory_slot * slot)607 static inline int kvm_iommu_map_pages(struct kvm *kvm,
608 struct kvm_memory_slot *slot)
609 {
610 return 0;
611 }
612
kvm_iommu_unmap_pages(struct kvm * kvm,struct kvm_memory_slot * slot)613 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
614 struct kvm_memory_slot *slot)
615 {
616 }
617
kvm_iommu_map_guest(struct kvm * kvm)618 static inline int kvm_iommu_map_guest(struct kvm *kvm)
619 {
620 return -ENODEV;
621 }
622
kvm_iommu_unmap_guest(struct kvm * kvm)623 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
624 {
625 return 0;
626 }
627
kvm_assign_device(struct kvm * kvm,struct kvm_assigned_dev_kernel * assigned_dev)628 static inline int kvm_assign_device(struct kvm *kvm,
629 struct kvm_assigned_dev_kernel *assigned_dev)
630 {
631 return 0;
632 }
633
kvm_deassign_device(struct kvm * kvm,struct kvm_assigned_dev_kernel * assigned_dev)634 static inline int kvm_deassign_device(struct kvm *kvm,
635 struct kvm_assigned_dev_kernel *assigned_dev)
636 {
637 return 0;
638 }
639 #endif /* CONFIG_IOMMU_API */
640
kvm_guest_enter(void)641 static inline void kvm_guest_enter(void)
642 {
643 BUG_ON(preemptible());
644 account_system_vtime(current);
645 current->flags |= PF_VCPU;
646 /* KVM does not hold any references to rcu protected data when it
647 * switches CPU into a guest mode. In fact switching to a guest mode
648 * is very similar to exiting to userspase from rcu point of view. In
649 * addition CPU may stay in a guest mode for quite a long time (up to
650 * one time slice). Lets treat guest mode as quiescent state, just like
651 * we do with user-mode execution.
652 */
653 rcu_virt_note_context_switch(smp_processor_id());
654 }
655
kvm_guest_exit(void)656 static inline void kvm_guest_exit(void)
657 {
658 account_system_vtime(current);
659 current->flags &= ~PF_VCPU;
660 }
661
662 /*
663 * search_memslots() and __gfn_to_memslot() are here because they are
664 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
665 * gfn_to_memslot() itself isn't here as an inline because that would
666 * bloat other code too much.
667 */
668 static inline struct kvm_memory_slot *
search_memslots(struct kvm_memslots * slots,gfn_t gfn)669 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
670 {
671 struct kvm_memory_slot *memslot;
672
673 kvm_for_each_memslot(memslot, slots)
674 if (gfn >= memslot->base_gfn &&
675 gfn < memslot->base_gfn + memslot->npages)
676 return memslot;
677
678 return NULL;
679 }
680
681 static inline struct kvm_memory_slot *
__gfn_to_memslot(struct kvm_memslots * slots,gfn_t gfn)682 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
683 {
684 return search_memslots(slots, gfn);
685 }
686
memslot_id(struct kvm * kvm,gfn_t gfn)687 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
688 {
689 return gfn_to_memslot(kvm, gfn)->id;
690 }
691
gfn_to_index(gfn_t gfn,gfn_t base_gfn,int level)692 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
693 {
694 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
695 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
696 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
697 }
698
gfn_to_hva_memslot(struct kvm_memory_slot * slot,gfn_t gfn)699 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
700 gfn_t gfn)
701 {
702 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
703 }
704
gfn_to_gpa(gfn_t gfn)705 static inline gpa_t gfn_to_gpa(gfn_t gfn)
706 {
707 return (gpa_t)gfn << PAGE_SHIFT;
708 }
709
gpa_to_gfn(gpa_t gpa)710 static inline gfn_t gpa_to_gfn(gpa_t gpa)
711 {
712 return (gfn_t)(gpa >> PAGE_SHIFT);
713 }
714
pfn_to_hpa(pfn_t pfn)715 static inline hpa_t pfn_to_hpa(pfn_t pfn)
716 {
717 return (hpa_t)pfn << PAGE_SHIFT;
718 }
719
kvm_migrate_timers(struct kvm_vcpu * vcpu)720 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
721 {
722 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
723 }
724
725 enum kvm_stat_kind {
726 KVM_STAT_VM,
727 KVM_STAT_VCPU,
728 };
729
730 struct kvm_stats_debugfs_item {
731 const char *name;
732 int offset;
733 enum kvm_stat_kind kind;
734 struct dentry *dentry;
735 };
736 extern struct kvm_stats_debugfs_item debugfs_entries[];
737 extern struct dentry *kvm_debugfs_dir;
738
739 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
mmu_notifier_retry(struct kvm_vcpu * vcpu,unsigned long mmu_seq)740 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
741 {
742 if (unlikely(vcpu->kvm->mmu_notifier_count))
743 return 1;
744 /*
745 * Ensure the read of mmu_notifier_count happens before the read
746 * of mmu_notifier_seq. This interacts with the smp_wmb() in
747 * mmu_notifier_invalidate_range_end to make sure that the caller
748 * either sees the old (non-zero) value of mmu_notifier_count or
749 * the new (incremented) value of mmu_notifier_seq.
750 * PowerPC Book3s HV KVM calls this under a per-page lock
751 * rather than under kvm->mmu_lock, for scalability, so
752 * can't rely on kvm->mmu_lock to keep things ordered.
753 */
754 smp_rmb();
755 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
756 return 1;
757 return 0;
758 }
759 #endif
760
761 #ifdef CONFIG_HAVE_KVM_IRQCHIP
762
763 #define KVM_MAX_IRQ_ROUTES 1024
764
765 int kvm_setup_default_irq_routing(struct kvm *kvm);
766 int kvm_set_irq_routing(struct kvm *kvm,
767 const struct kvm_irq_routing_entry *entries,
768 unsigned nr,
769 unsigned flags);
770 void kvm_free_irq_routing(struct kvm *kvm);
771
772 #else
773
kvm_free_irq_routing(struct kvm * kvm)774 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
775
776 #endif
777
778 #ifdef CONFIG_HAVE_KVM_EVENTFD
779
780 void kvm_eventfd_init(struct kvm *kvm);
781 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
782 void kvm_irqfd_release(struct kvm *kvm);
783 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
784 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
785
786 #else
787
kvm_eventfd_init(struct kvm * kvm)788 static inline void kvm_eventfd_init(struct kvm *kvm) {}
789
kvm_irqfd(struct kvm * kvm,int fd,int gsi,int flags)790 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
791 {
792 return -EINVAL;
793 }
794
kvm_irqfd_release(struct kvm * kvm)795 static inline void kvm_irqfd_release(struct kvm *kvm) {}
796
797 #ifdef CONFIG_HAVE_KVM_IRQCHIP
kvm_irq_routing_update(struct kvm * kvm,struct kvm_irq_routing_table * irq_rt)798 static inline void kvm_irq_routing_update(struct kvm *kvm,
799 struct kvm_irq_routing_table *irq_rt)
800 {
801 rcu_assign_pointer(kvm->irq_routing, irq_rt);
802 }
803 #endif
804
kvm_ioeventfd(struct kvm * kvm,struct kvm_ioeventfd * args)805 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
806 {
807 return -ENOSYS;
808 }
809
810 #endif /* CONFIG_HAVE_KVM_EVENTFD */
811
812 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
kvm_vcpu_is_bsp(struct kvm_vcpu * vcpu)813 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
814 {
815 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
816 }
817
818 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
819
820 #else
821
kvm_vcpu_compatible(struct kvm_vcpu * vcpu)822 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
823
824 #endif
825
826 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
827
828 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
829 unsigned long arg);
830
831 #else
832
kvm_vm_ioctl_assigned_device(struct kvm * kvm,unsigned ioctl,unsigned long arg)833 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
834 unsigned long arg)
835 {
836 return -ENOTTY;
837 }
838
839 #endif
840
kvm_make_request(int req,struct kvm_vcpu * vcpu)841 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
842 {
843 set_bit(req, &vcpu->requests);
844 }
845
kvm_check_request(int req,struct kvm_vcpu * vcpu)846 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
847 {
848 if (test_bit(req, &vcpu->requests)) {
849 clear_bit(req, &vcpu->requests);
850 return true;
851 } else {
852 return false;
853 }
854 }
855
856 #endif
857
858