1
2#ifndef __KVM_HOST_H
3#define __KVM_HOST_H
4
5
6#include <linux/types.h>
7#include <linux/hardirq.h>
8#include <linux/list.h>
9#include <linux/mutex.h>
10#include <linux/spinlock.h>
11#include <linux/signal.h>
12#include <linux/sched.h>
13#include <linux/sched/stat.h>
14#include <linux/bug.h>
15#include <linux/minmax.h>
16#include <linux/mm.h>
17#include <linux/mmu_notifier.h>
18#include <linux/preempt.h>
19#include <linux/msi.h>
20#include <linux/slab.h>
21#include <linux/vmalloc.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 <linux/irqbypass.h>
28#include <linux/rcuwait.h>
29#include <linux/refcount.h>
30#include <linux/nospec.h>
31#include <linux/notifier.h>
32#include <asm/signal.h>
33
34#include <linux/kvm.h>
35#include <linux/kvm_para.h>
36
37#include <linux/kvm_types.h>
38
39#include <asm/kvm_host.h>
40#include <linux/kvm_dirty_ring.h>
41
42#ifndef KVM_MAX_VCPU_IDS
43#define KVM_MAX_VCPU_IDS KVM_MAX_VCPUS
44#endif
45
46
47
48
49
50
51#define KVM_MEMSLOT_INVALID (1UL << 16)
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72#define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63)
73
74
75#define KVM_MAX_MMIO_FRAGMENTS 2
76
77#ifndef KVM_ADDRESS_SPACE_NUM
78#define KVM_ADDRESS_SPACE_NUM 1
79#endif
80
81
82
83
84
85
86#define KVM_PFN_ERR_MASK (0x7ffULL << 52)
87#define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
88#define KVM_PFN_NOSLOT (0x1ULL << 63)
89
90#define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
91#define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
92#define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
93
94
95
96
97
98static inline bool is_error_pfn(kvm_pfn_t pfn)
99{
100 return !!(pfn & KVM_PFN_ERR_MASK);
101}
102
103
104
105
106
107
108static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
109{
110 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
111}
112
113
114static inline bool is_noslot_pfn(kvm_pfn_t pfn)
115{
116 return pfn == KVM_PFN_NOSLOT;
117}
118
119
120
121
122
123#ifndef KVM_HVA_ERR_BAD
124
125#define KVM_HVA_ERR_BAD (PAGE_OFFSET)
126#define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
127
128static inline bool kvm_is_error_hva(unsigned long addr)
129{
130 return addr >= PAGE_OFFSET;
131}
132
133#endif
134
135#define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
136
137static inline bool is_error_page(struct page *page)
138{
139 return IS_ERR(page);
140}
141
142#define KVM_REQUEST_MASK GENMASK(7,0)
143#define KVM_REQUEST_NO_WAKEUP BIT(8)
144#define KVM_REQUEST_WAIT BIT(9)
145
146
147
148
149#define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
150#define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
151#define KVM_REQ_UNBLOCK 2
152#define KVM_REQ_UNHALT 3
153#define KVM_REQ_VM_DEAD (4 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
154#define KVM_REQUEST_ARCH_BASE 8
155
156#define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
157 BUILD_BUG_ON((unsigned)(nr) >= (sizeof_field(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
158 (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
159})
160#define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
161
162bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,
163 unsigned long *vcpu_bitmap);
164bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
165bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,
166 struct kvm_vcpu *except);
167bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req,
168 unsigned long *vcpu_bitmap);
169
170#define KVM_USERSPACE_IRQ_SOURCE_ID 0
171#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
172
173extern struct mutex kvm_lock;
174extern struct list_head vm_list;
175
176struct kvm_io_range {
177 gpa_t addr;
178 int len;
179 struct kvm_io_device *dev;
180};
181
182#define NR_IOBUS_DEVS 1000
183
184struct kvm_io_bus {
185 int dev_count;
186 int ioeventfd_count;
187 struct kvm_io_range range[];
188};
189
190enum kvm_bus {
191 KVM_MMIO_BUS,
192 KVM_PIO_BUS,
193 KVM_VIRTIO_CCW_NOTIFY_BUS,
194 KVM_FAST_MMIO_BUS,
195 KVM_NR_BUSES
196};
197
198int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
199 int len, const void *val);
200int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
201 gpa_t addr, int len, const void *val, long cookie);
202int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
203 int len, void *val);
204int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
205 int len, struct kvm_io_device *dev);
206int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
207 struct kvm_io_device *dev);
208struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
209 gpa_t addr);
210
211#ifdef CONFIG_KVM_ASYNC_PF
212struct kvm_async_pf {
213 struct work_struct work;
214 struct list_head link;
215 struct list_head queue;
216 struct kvm_vcpu *vcpu;
217 struct mm_struct *mm;
218 gpa_t cr2_or_gpa;
219 unsigned long addr;
220 struct kvm_arch_async_pf arch;
221 bool wakeup_all;
222 bool notpresent_injected;
223};
224
225void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
226void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
227bool kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
228 unsigned long hva, struct kvm_arch_async_pf *arch);
229int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
230#endif
231
232#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
233struct kvm_gfn_range {
234 struct kvm_memory_slot *slot;
235 gfn_t start;
236 gfn_t end;
237 pte_t pte;
238 bool may_block;
239};
240bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range);
241bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
242bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
243bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
244#endif
245
246enum {
247 OUTSIDE_GUEST_MODE,
248 IN_GUEST_MODE,
249 EXITING_GUEST_MODE,
250 READING_SHADOW_PAGE_TABLES,
251};
252
253#define KVM_UNMAPPED_PAGE ((void *) 0x500 + POISON_POINTER_DELTA)
254
255struct kvm_host_map {
256
257
258
259
260
261
262
263
264 struct page *page;
265 void *hva;
266 kvm_pfn_t pfn;
267 kvm_pfn_t gfn;
268};
269
270
271
272
273
274static inline bool kvm_vcpu_mapped(struct kvm_host_map *map)
275{
276 return !!map->hva;
277}
278
279static inline bool kvm_vcpu_can_poll(ktime_t cur, ktime_t stop)
280{
281 return single_task_running() && !need_resched() && ktime_before(cur, stop);
282}
283
284
285
286
287
288struct kvm_mmio_fragment {
289 gpa_t gpa;
290 void *data;
291 unsigned len;
292};
293
294struct kvm_vcpu {
295 struct kvm *kvm;
296#ifdef CONFIG_PREEMPT_NOTIFIERS
297 struct preempt_notifier preempt_notifier;
298#endif
299 int cpu;
300 int vcpu_id;
301 int vcpu_idx;
302 int srcu_idx;
303 int mode;
304 u64 requests;
305 unsigned long guest_debug;
306
307 int pre_pcpu;
308 struct list_head blocked_vcpu_list;
309
310 struct mutex mutex;
311 struct kvm_run *run;
312
313 struct rcuwait wait;
314 struct pid __rcu *pid;
315 int sigset_active;
316 sigset_t sigset;
317 unsigned int halt_poll_ns;
318 bool valid_wakeup;
319
320#ifdef CONFIG_HAS_IOMEM
321 int mmio_needed;
322 int mmio_read_completed;
323 int mmio_is_write;
324 int mmio_cur_fragment;
325 int mmio_nr_fragments;
326 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
327#endif
328
329#ifdef CONFIG_KVM_ASYNC_PF
330 struct {
331 u32 queued;
332 struct list_head queue;
333 struct list_head done;
334 spinlock_t lock;
335 } async_pf;
336#endif
337
338#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
339
340
341
342
343
344
345 struct {
346 bool in_spin_loop;
347 bool dy_eligible;
348 } spin_loop;
349#endif
350 bool preempted;
351 bool ready;
352 struct kvm_vcpu_arch arch;
353 struct kvm_vcpu_stat stat;
354 char stats_id[KVM_STATS_NAME_SIZE];
355 struct kvm_dirty_ring dirty_ring;
356
357
358
359
360
361
362 int last_used_slot;
363};
364
365
366static __always_inline void guest_enter_irqoff(void)
367{
368
369
370
371
372 instrumentation_begin();
373 vtime_account_guest_enter();
374 instrumentation_end();
375
376
377
378
379
380
381
382
383
384 if (!context_tracking_guest_enter()) {
385 instrumentation_begin();
386 rcu_virt_note_context_switch(smp_processor_id());
387 instrumentation_end();
388 }
389}
390
391static __always_inline void guest_exit_irqoff(void)
392{
393 context_tracking_guest_exit();
394
395 instrumentation_begin();
396
397 vtime_account_guest_exit();
398 instrumentation_end();
399}
400
401static inline void guest_exit(void)
402{
403 unsigned long flags;
404
405 local_irq_save(flags);
406 guest_exit_irqoff();
407 local_irq_restore(flags);
408}
409
410static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
411{
412
413
414
415
416
417 smp_mb__before_atomic();
418 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
419}
420
421
422
423
424
425#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
426
427struct kvm_memory_slot {
428 gfn_t base_gfn;
429 unsigned long npages;
430 unsigned long *dirty_bitmap;
431 struct kvm_arch_memory_slot arch;
432 unsigned long userspace_addr;
433 u32 flags;
434 short id;
435 u16 as_id;
436};
437
438static inline bool kvm_slot_dirty_track_enabled(struct kvm_memory_slot *slot)
439{
440 return slot->flags & KVM_MEM_LOG_DIRTY_PAGES;
441}
442
443static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
444{
445 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
446}
447
448static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot *memslot)
449{
450 unsigned long len = kvm_dirty_bitmap_bytes(memslot);
451
452 return memslot->dirty_bitmap + len / sizeof(*memslot->dirty_bitmap);
453}
454
455#ifndef KVM_DIRTY_LOG_MANUAL_CAPS
456#define KVM_DIRTY_LOG_MANUAL_CAPS KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE
457#endif
458
459struct kvm_s390_adapter_int {
460 u64 ind_addr;
461 u64 summary_addr;
462 u64 ind_offset;
463 u32 summary_offset;
464 u32 adapter_id;
465};
466
467struct kvm_hv_sint {
468 u32 vcpu;
469 u32 sint;
470};
471
472struct kvm_kernel_irq_routing_entry {
473 u32 gsi;
474 u32 type;
475 int (*set)(struct kvm_kernel_irq_routing_entry *e,
476 struct kvm *kvm, int irq_source_id, int level,
477 bool line_status);
478 union {
479 struct {
480 unsigned irqchip;
481 unsigned pin;
482 } irqchip;
483 struct {
484 u32 address_lo;
485 u32 address_hi;
486 u32 data;
487 u32 flags;
488 u32 devid;
489 } msi;
490 struct kvm_s390_adapter_int adapter;
491 struct kvm_hv_sint hv_sint;
492 };
493 struct hlist_node link;
494};
495
496#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
497struct kvm_irq_routing_table {
498 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
499 u32 nr_rt_entries;
500
501
502
503
504 struct hlist_head map[];
505};
506#endif
507
508#ifndef KVM_PRIVATE_MEM_SLOTS
509#define KVM_PRIVATE_MEM_SLOTS 0
510#endif
511
512#define KVM_MEM_SLOTS_NUM SHRT_MAX
513#define KVM_USER_MEM_SLOTS (KVM_MEM_SLOTS_NUM - KVM_PRIVATE_MEM_SLOTS)
514
515#ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
516static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
517{
518 return 0;
519}
520#endif
521
522
523
524
525
526
527struct kvm_memslots {
528 u64 generation;
529
530 short id_to_index[KVM_MEM_SLOTS_NUM];
531 atomic_t last_used_slot;
532 int used_slots;
533 struct kvm_memory_slot memslots[];
534};
535
536struct kvm {
537#ifdef KVM_HAVE_MMU_RWLOCK
538 rwlock_t mmu_lock;
539#else
540 spinlock_t mmu_lock;
541#endif
542
543 struct mutex slots_lock;
544
545
546
547
548
549
550
551
552 struct mutex slots_arch_lock;
553 struct mm_struct *mm;
554 struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];
555 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
556
557
558 spinlock_t mn_invalidate_lock;
559 unsigned long mn_active_invalidate_count;
560 struct rcuwait mn_memslots_update_rcuwait;
561
562
563
564
565
566
567
568 atomic_t online_vcpus;
569 int created_vcpus;
570 int last_boosted_vcpu;
571 struct list_head vm_list;
572 struct mutex lock;
573 struct kvm_io_bus __rcu *buses[KVM_NR_BUSES];
574#ifdef CONFIG_HAVE_KVM_EVENTFD
575 struct {
576 spinlock_t lock;
577 struct list_head items;
578 struct list_head resampler_list;
579 struct mutex resampler_lock;
580 } irqfds;
581 struct list_head ioeventfds;
582#endif
583 struct kvm_vm_stat stat;
584 struct kvm_arch arch;
585 refcount_t users_count;
586#ifdef CONFIG_KVM_MMIO
587 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
588 spinlock_t ring_lock;
589 struct list_head coalesced_zones;
590#endif
591
592 struct mutex irq_lock;
593#ifdef CONFIG_HAVE_KVM_IRQCHIP
594
595
596
597 struct kvm_irq_routing_table __rcu *irq_routing;
598#endif
599#ifdef CONFIG_HAVE_KVM_IRQFD
600 struct hlist_head irq_ack_notifier_list;
601#endif
602
603#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
604 struct mmu_notifier mmu_notifier;
605 unsigned long mmu_notifier_seq;
606 long mmu_notifier_count;
607 unsigned long mmu_notifier_range_start;
608 unsigned long mmu_notifier_range_end;
609#endif
610 struct list_head devices;
611 u64 manual_dirty_log_protect;
612 struct dentry *debugfs_dentry;
613 struct kvm_stat_data **debugfs_stat_data;
614 struct srcu_struct srcu;
615 struct srcu_struct irq_srcu;
616 pid_t userspace_pid;
617 unsigned int max_halt_poll_ns;
618 u32 dirty_ring_size;
619 bool vm_bugged;
620 bool vm_dead;
621
622#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
623 struct notifier_block pm_notifier;
624#endif
625 char stats_id[KVM_STATS_NAME_SIZE];
626};
627
628#define kvm_err(fmt, ...) \
629 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
630#define kvm_info(fmt, ...) \
631 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
632#define kvm_debug(fmt, ...) \
633 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
634#define kvm_debug_ratelimited(fmt, ...) \
635 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
636 ## __VA_ARGS__)
637#define kvm_pr_unimpl(fmt, ...) \
638 pr_err_ratelimited("kvm [%i]: " fmt, \
639 task_tgid_nr(current), ## __VA_ARGS__)
640
641
642#define vcpu_unimpl(vcpu, fmt, ...) \
643 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
644 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
645
646#define vcpu_debug(vcpu, fmt, ...) \
647 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
648#define vcpu_debug_ratelimited(vcpu, fmt, ...) \
649 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
650 ## __VA_ARGS__)
651#define vcpu_err(vcpu, fmt, ...) \
652 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
653
654static inline void kvm_vm_dead(struct kvm *kvm)
655{
656 kvm->vm_dead = true;
657 kvm_make_all_cpus_request(kvm, KVM_REQ_VM_DEAD);
658}
659
660static inline void kvm_vm_bugged(struct kvm *kvm)
661{
662 kvm->vm_bugged = true;
663 kvm_vm_dead(kvm);
664}
665
666
667#define KVM_BUG(cond, kvm, fmt...) \
668({ \
669 int __ret = (cond); \
670 \
671 if (WARN_ONCE(__ret && !(kvm)->vm_bugged, fmt)) \
672 kvm_vm_bugged(kvm); \
673 unlikely(__ret); \
674})
675
676#define KVM_BUG_ON(cond, kvm) \
677({ \
678 int __ret = (cond); \
679 \
680 if (WARN_ON_ONCE(__ret && !(kvm)->vm_bugged)) \
681 kvm_vm_bugged(kvm); \
682 unlikely(__ret); \
683})
684
685static inline bool kvm_dirty_log_manual_protect_and_init_set(struct kvm *kvm)
686{
687 return !!(kvm->manual_dirty_log_protect & KVM_DIRTY_LOG_INITIALLY_SET);
688}
689
690static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
691{
692 return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
693 lockdep_is_held(&kvm->slots_lock) ||
694 !refcount_read(&kvm->users_count));
695}
696
697static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
698{
699 int num_vcpus = atomic_read(&kvm->online_vcpus);
700 i = array_index_nospec(i, num_vcpus);
701
702
703 smp_rmb();
704 return kvm->vcpus[i];
705}
706
707#define kvm_for_each_vcpu(idx, vcpup, kvm) \
708 for (idx = 0; \
709 idx < atomic_read(&kvm->online_vcpus) && \
710 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
711 idx++)
712
713static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
714{
715 struct kvm_vcpu *vcpu = NULL;
716 int i;
717
718 if (id < 0)
719 return NULL;
720 if (id < KVM_MAX_VCPUS)
721 vcpu = kvm_get_vcpu(kvm, id);
722 if (vcpu && vcpu->vcpu_id == id)
723 return vcpu;
724 kvm_for_each_vcpu(i, vcpu, kvm)
725 if (vcpu->vcpu_id == id)
726 return vcpu;
727 return NULL;
728}
729
730#define kvm_for_each_memslot(memslot, slots) \
731 for (memslot = &slots->memslots[0]; \
732 memslot < slots->memslots + slots->used_slots; memslot++) \
733 if (WARN_ON_ONCE(!memslot->npages)) { \
734 } else
735
736void kvm_vcpu_destroy(struct kvm_vcpu *vcpu);
737
738void vcpu_load(struct kvm_vcpu *vcpu);
739void vcpu_put(struct kvm_vcpu *vcpu);
740
741#ifdef __KVM_HAVE_IOAPIC
742void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
743void kvm_arch_post_irq_routing_update(struct kvm *kvm);
744#else
745static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
746{
747}
748static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
749{
750}
751#endif
752
753#ifdef CONFIG_HAVE_KVM_IRQFD
754int kvm_irqfd_init(void);
755void kvm_irqfd_exit(void);
756#else
757static inline int kvm_irqfd_init(void)
758{
759 return 0;
760}
761
762static inline void kvm_irqfd_exit(void)
763{
764}
765#endif
766int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
767 struct module *module);
768void kvm_exit(void);
769
770void kvm_get_kvm(struct kvm *kvm);
771bool kvm_get_kvm_safe(struct kvm *kvm);
772void kvm_put_kvm(struct kvm *kvm);
773bool file_is_kvm(struct file *file);
774void kvm_put_kvm_no_destroy(struct kvm *kvm);
775
776static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
777{
778 as_id = array_index_nospec(as_id, KVM_ADDRESS_SPACE_NUM);
779 return srcu_dereference_check(kvm->memslots[as_id], &kvm->srcu,
780 lockdep_is_held(&kvm->slots_lock) ||
781 !refcount_read(&kvm->users_count));
782}
783
784static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
785{
786 return __kvm_memslots(kvm, 0);
787}
788
789static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
790{
791 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
792
793 return __kvm_memslots(vcpu->kvm, as_id);
794}
795
796static inline
797struct kvm_memory_slot *id_to_memslot(struct kvm_memslots *slots, int id)
798{
799 int index = slots->id_to_index[id];
800 struct kvm_memory_slot *slot;
801
802 if (index < 0)
803 return NULL;
804
805 slot = &slots->memslots[index];
806
807 WARN_ON(slot->id != id);
808 return slot;
809}
810
811
812
813
814
815
816
817
818
819
820
821
822enum kvm_mr_change {
823 KVM_MR_CREATE,
824 KVM_MR_DELETE,
825 KVM_MR_MOVE,
826 KVM_MR_FLAGS_ONLY,
827};
828
829int kvm_set_memory_region(struct kvm *kvm,
830 const struct kvm_userspace_memory_region *mem);
831int __kvm_set_memory_region(struct kvm *kvm,
832 const struct kvm_userspace_memory_region *mem);
833void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot);
834void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
835int kvm_arch_prepare_memory_region(struct kvm *kvm,
836 struct kvm_memory_slot *memslot,
837 const struct kvm_userspace_memory_region *mem,
838 enum kvm_mr_change change);
839void kvm_arch_commit_memory_region(struct kvm *kvm,
840 const struct kvm_userspace_memory_region *mem,
841 struct kvm_memory_slot *old,
842 const struct kvm_memory_slot *new,
843 enum kvm_mr_change change);
844
845void kvm_arch_flush_shadow_all(struct kvm *kvm);
846
847void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
848 struct kvm_memory_slot *slot);
849
850int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
851 struct page **pages, int nr_pages);
852
853struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
854unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
855unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
856unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
857unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
858 bool *writable);
859void kvm_release_page_clean(struct page *page);
860void kvm_release_page_dirty(struct page *page);
861void kvm_set_page_accessed(struct page *page);
862
863kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
864kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
865 bool *writable);
866kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
867kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
868kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
869 bool atomic, bool *async, bool write_fault,
870 bool *writable, hva_t *hva);
871
872void kvm_release_pfn_clean(kvm_pfn_t pfn);
873void kvm_release_pfn_dirty(kvm_pfn_t pfn);
874void kvm_set_pfn_dirty(kvm_pfn_t pfn);
875void kvm_set_pfn_accessed(kvm_pfn_t pfn);
876
877void kvm_release_pfn(kvm_pfn_t pfn, bool dirty);
878int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
879 int len);
880int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
881int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
882 void *data, unsigned long len);
883int kvm_read_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
884 void *data, unsigned int offset,
885 unsigned long len);
886int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
887 int offset, int len);
888int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
889 unsigned long len);
890int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
891 void *data, unsigned long len);
892int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
893 void *data, unsigned int offset,
894 unsigned long len);
895int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
896 gpa_t gpa, unsigned long len);
897
898#define __kvm_get_guest(kvm, gfn, offset, v) \
899({ \
900 unsigned long __addr = gfn_to_hva(kvm, gfn); \
901 typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \
902 int __ret = -EFAULT; \
903 \
904 if (!kvm_is_error_hva(__addr)) \
905 __ret = get_user(v, __uaddr); \
906 __ret; \
907})
908
909#define kvm_get_guest(kvm, gpa, v) \
910({ \
911 gpa_t __gpa = gpa; \
912 struct kvm *__kvm = kvm; \
913 \
914 __kvm_get_guest(__kvm, __gpa >> PAGE_SHIFT, \
915 offset_in_page(__gpa), v); \
916})
917
918#define __kvm_put_guest(kvm, gfn, offset, v) \
919({ \
920 unsigned long __addr = gfn_to_hva(kvm, gfn); \
921 typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \
922 int __ret = -EFAULT; \
923 \
924 if (!kvm_is_error_hva(__addr)) \
925 __ret = put_user(v, __uaddr); \
926 if (!__ret) \
927 mark_page_dirty(kvm, gfn); \
928 __ret; \
929})
930
931#define kvm_put_guest(kvm, gpa, v) \
932({ \
933 gpa_t __gpa = gpa; \
934 struct kvm *__kvm = kvm; \
935 \
936 __kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT, \
937 offset_in_page(__gpa), v); \
938})
939
940int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
941struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
942bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
943bool kvm_vcpu_is_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
944unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn);
945void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, gfn_t gfn);
946void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
947
948struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
949struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
950kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
951kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
952int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map);
953struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
954void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty);
955unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
956unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
957int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
958 int len);
959int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
960 unsigned long len);
961int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
962 unsigned long len);
963int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
964 int offset, int len);
965int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
966 unsigned long len);
967void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
968
969void kvm_sigset_activate(struct kvm_vcpu *vcpu);
970void kvm_sigset_deactivate(struct kvm_vcpu *vcpu);
971
972void kvm_vcpu_block(struct kvm_vcpu *vcpu);
973void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
974void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
975bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
976void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
977int kvm_vcpu_yield_to(struct kvm_vcpu *target);
978void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu, bool usermode_vcpu_not_eligible);
979
980void kvm_flush_remote_tlbs(struct kvm *kvm);
981void kvm_reload_remote_mmus(struct kvm *kvm);
982
983#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
984int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min);
985int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc);
986void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc);
987void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc);
988#endif
989
990void kvm_inc_notifier_count(struct kvm *kvm, unsigned long start,
991 unsigned long end);
992void kvm_dec_notifier_count(struct kvm *kvm, unsigned long start,
993 unsigned long end);
994
995long kvm_arch_dev_ioctl(struct file *filp,
996 unsigned int ioctl, unsigned long arg);
997long kvm_arch_vcpu_ioctl(struct file *filp,
998 unsigned int ioctl, unsigned long arg);
999vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
1000
1001int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
1002
1003void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
1004 struct kvm_memory_slot *slot,
1005 gfn_t gfn_offset,
1006 unsigned long mask);
1007void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot);
1008
1009#ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
1010void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
1011 const struct kvm_memory_slot *memslot);
1012#else
1013int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log);
1014int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log,
1015 int *is_dirty, struct kvm_memory_slot **memslot);
1016#endif
1017
1018int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
1019 bool line_status);
1020int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1021 struct kvm_enable_cap *cap);
1022long kvm_arch_vm_ioctl(struct file *filp,
1023 unsigned int ioctl, unsigned long arg);
1024
1025int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
1026int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
1027
1028int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1029 struct kvm_translation *tr);
1030
1031int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
1032int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
1033int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1034 struct kvm_sregs *sregs);
1035int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1036 struct kvm_sregs *sregs);
1037int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1038 struct kvm_mp_state *mp_state);
1039int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1040 struct kvm_mp_state *mp_state);
1041int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1042 struct kvm_guest_debug *dbg);
1043int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu);
1044
1045int kvm_arch_init(void *opaque);
1046void kvm_arch_exit(void);
1047
1048void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
1049
1050void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
1051void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
1052int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id);
1053int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu);
1054void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
1055void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
1056
1057#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
1058int kvm_arch_pm_notifier(struct kvm *kvm, unsigned long state);
1059#endif
1060
1061#ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
1062void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry);
1063#endif
1064
1065int kvm_arch_hardware_enable(void);
1066void kvm_arch_hardware_disable(void);
1067int kvm_arch_hardware_setup(void *opaque);
1068void kvm_arch_hardware_unsetup(void);
1069int kvm_arch_check_processor_compat(void *opaque);
1070int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
1071bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu);
1072int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
1073bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu);
1074bool kvm_arch_dy_has_pending_interrupt(struct kvm_vcpu *vcpu);
1075int kvm_arch_post_init_vm(struct kvm *kvm);
1076void kvm_arch_pre_destroy_vm(struct kvm *kvm);
1077int kvm_arch_create_vm_debugfs(struct kvm *kvm);
1078
1079#ifndef __KVM_HAVE_ARCH_VM_ALLOC
1080
1081
1082
1083
1084static inline struct kvm *kvm_arch_alloc_vm(void)
1085{
1086 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
1087}
1088#endif
1089
1090static inline void __kvm_arch_free_vm(struct kvm *kvm)
1091{
1092 kvfree(kvm);
1093}
1094
1095#ifndef __KVM_HAVE_ARCH_VM_FREE
1096static inline void kvm_arch_free_vm(struct kvm *kvm)
1097{
1098 __kvm_arch_free_vm(kvm);
1099}
1100#endif
1101
1102#ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
1103static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
1104{
1105 return -ENOTSUPP;
1106}
1107#endif
1108
1109#ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
1110void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
1111void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
1112bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
1113#else
1114static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
1115{
1116}
1117
1118static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
1119{
1120}
1121
1122static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
1123{
1124 return false;
1125}
1126#endif
1127#ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
1128void kvm_arch_start_assignment(struct kvm *kvm);
1129void kvm_arch_end_assignment(struct kvm *kvm);
1130bool kvm_arch_has_assigned_device(struct kvm *kvm);
1131#else
1132static inline void kvm_arch_start_assignment(struct kvm *kvm)
1133{
1134}
1135
1136static inline void kvm_arch_end_assignment(struct kvm *kvm)
1137{
1138}
1139
1140static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
1141{
1142 return false;
1143}
1144#endif
1145
1146static inline struct rcuwait *kvm_arch_vcpu_get_wait(struct kvm_vcpu *vcpu)
1147{
1148#ifdef __KVM_HAVE_ARCH_WQP
1149 return vcpu->arch.waitp;
1150#else
1151 return &vcpu->wait;
1152#endif
1153}
1154
1155#ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
1156
1157
1158
1159
1160
1161bool kvm_arch_intc_initialized(struct kvm *kvm);
1162#else
1163static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
1164{
1165 return true;
1166}
1167#endif
1168
1169int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
1170void kvm_arch_destroy_vm(struct kvm *kvm);
1171void kvm_arch_sync_events(struct kvm *kvm);
1172
1173int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
1174
1175bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
1176bool kvm_is_zone_device_pfn(kvm_pfn_t pfn);
1177bool kvm_is_transparent_hugepage(kvm_pfn_t pfn);
1178
1179struct kvm_irq_ack_notifier {
1180 struct hlist_node link;
1181 unsigned gsi;
1182 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
1183};
1184
1185int kvm_irq_map_gsi(struct kvm *kvm,
1186 struct kvm_kernel_irq_routing_entry *entries, int gsi);
1187int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
1188
1189int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
1190 bool line_status);
1191int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
1192 int irq_source_id, int level, bool line_status);
1193int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
1194 struct kvm *kvm, int irq_source_id,
1195 int level, bool line_status);
1196bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
1197void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
1198void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
1199void kvm_register_irq_ack_notifier(struct kvm *kvm,
1200 struct kvm_irq_ack_notifier *kian);
1201void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
1202 struct kvm_irq_ack_notifier *kian);
1203int kvm_request_irq_source_id(struct kvm *kvm);
1204void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
1205bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args);
1206
1207
1208
1209
1210
1211static inline struct kvm_memory_slot *
1212try_get_memslot(struct kvm_memslots *slots, int slot_index, gfn_t gfn)
1213{
1214 struct kvm_memory_slot *slot;
1215
1216 if (slot_index < 0 || slot_index >= slots->used_slots)
1217 return NULL;
1218
1219
1220
1221
1222
1223
1224 slot_index = array_index_nospec(slot_index, slots->used_slots);
1225 slot = &slots->memslots[slot_index];
1226
1227 if (gfn >= slot->base_gfn && gfn < slot->base_gfn + slot->npages)
1228 return slot;
1229 else
1230 return NULL;
1231}
1232
1233
1234
1235
1236
1237
1238
1239static inline struct kvm_memory_slot *
1240search_memslots(struct kvm_memslots *slots, gfn_t gfn, int *index)
1241{
1242 int start = 0, end = slots->used_slots;
1243 struct kvm_memory_slot *memslots = slots->memslots;
1244 struct kvm_memory_slot *slot;
1245
1246 if (unlikely(!slots->used_slots))
1247 return NULL;
1248
1249 while (start < end) {
1250 int slot = start + (end - start) / 2;
1251
1252 if (gfn >= memslots[slot].base_gfn)
1253 end = slot;
1254 else
1255 start = slot + 1;
1256 }
1257
1258 slot = try_get_memslot(slots, start, gfn);
1259 if (slot) {
1260 *index = start;
1261 return slot;
1262 }
1263
1264 return NULL;
1265}
1266
1267
1268
1269
1270
1271
1272static inline struct kvm_memory_slot *
1273__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
1274{
1275 struct kvm_memory_slot *slot;
1276 int slot_index = atomic_read(&slots->last_used_slot);
1277
1278 slot = try_get_memslot(slots, slot_index, gfn);
1279 if (slot)
1280 return slot;
1281
1282 slot = search_memslots(slots, gfn, &slot_index);
1283 if (slot) {
1284 atomic_set(&slots->last_used_slot, slot_index);
1285 return slot;
1286 }
1287
1288 return NULL;
1289}
1290
1291static inline unsigned long
1292__gfn_to_hva_memslot(const struct kvm_memory_slot *slot, gfn_t gfn)
1293{
1294
1295
1296
1297
1298
1299
1300 unsigned long offset = gfn - slot->base_gfn;
1301 offset = array_index_nospec(offset, slot->npages);
1302 return slot->userspace_addr + offset * PAGE_SIZE;
1303}
1304
1305static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
1306{
1307 return gfn_to_memslot(kvm, gfn)->id;
1308}
1309
1310static inline gfn_t
1311hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
1312{
1313 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
1314
1315 return slot->base_gfn + gfn_offset;
1316}
1317
1318static inline gpa_t gfn_to_gpa(gfn_t gfn)
1319{
1320 return (gpa_t)gfn << PAGE_SHIFT;
1321}
1322
1323static inline gfn_t gpa_to_gfn(gpa_t gpa)
1324{
1325 return (gfn_t)(gpa >> PAGE_SHIFT);
1326}
1327
1328static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
1329{
1330 return (hpa_t)pfn << PAGE_SHIFT;
1331}
1332
1333static inline struct page *kvm_vcpu_gpa_to_page(struct kvm_vcpu *vcpu,
1334 gpa_t gpa)
1335{
1336 return kvm_vcpu_gfn_to_page(vcpu, gpa_to_gfn(gpa));
1337}
1338
1339static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
1340{
1341 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
1342
1343 return kvm_is_error_hva(hva);
1344}
1345
1346enum kvm_stat_kind {
1347 KVM_STAT_VM,
1348 KVM_STAT_VCPU,
1349};
1350
1351struct kvm_stat_data {
1352 struct kvm *kvm;
1353 const struct _kvm_stats_desc *desc;
1354 enum kvm_stat_kind kind;
1355};
1356
1357struct _kvm_stats_desc {
1358 struct kvm_stats_desc desc;
1359 char name[KVM_STATS_NAME_SIZE];
1360};
1361
1362#define STATS_DESC_COMMON(type, unit, base, exp, sz, bsz) \
1363 .flags = type | unit | base | \
1364 BUILD_BUG_ON_ZERO(type & ~KVM_STATS_TYPE_MASK) | \
1365 BUILD_BUG_ON_ZERO(unit & ~KVM_STATS_UNIT_MASK) | \
1366 BUILD_BUG_ON_ZERO(base & ~KVM_STATS_BASE_MASK), \
1367 .exponent = exp, \
1368 .size = sz, \
1369 .bucket_size = bsz
1370
1371#define VM_GENERIC_STATS_DESC(stat, type, unit, base, exp, sz, bsz) \
1372 { \
1373 { \
1374 STATS_DESC_COMMON(type, unit, base, exp, sz, bsz), \
1375 .offset = offsetof(struct kvm_vm_stat, generic.stat) \
1376 }, \
1377 .name = #stat, \
1378 }
1379#define VCPU_GENERIC_STATS_DESC(stat, type, unit, base, exp, sz, bsz) \
1380 { \
1381 { \
1382 STATS_DESC_COMMON(type, unit, base, exp, sz, bsz), \
1383 .offset = offsetof(struct kvm_vcpu_stat, generic.stat) \
1384 }, \
1385 .name = #stat, \
1386 }
1387#define VM_STATS_DESC(stat, type, unit, base, exp, sz, bsz) \
1388 { \
1389 { \
1390 STATS_DESC_COMMON(type, unit, base, exp, sz, bsz), \
1391 .offset = offsetof(struct kvm_vm_stat, stat) \
1392 }, \
1393 .name = #stat, \
1394 }
1395#define VCPU_STATS_DESC(stat, type, unit, base, exp, sz, bsz) \
1396 { \
1397 { \
1398 STATS_DESC_COMMON(type, unit, base, exp, sz, bsz), \
1399 .offset = offsetof(struct kvm_vcpu_stat, stat) \
1400 }, \
1401 .name = #stat, \
1402 }
1403
1404#define STATS_DESC(SCOPE, stat, type, unit, base, exp, sz, bsz) \
1405 SCOPE##_STATS_DESC(stat, type, unit, base, exp, sz, bsz)
1406
1407#define STATS_DESC_CUMULATIVE(SCOPE, name, unit, base, exponent) \
1408 STATS_DESC(SCOPE, name, KVM_STATS_TYPE_CUMULATIVE, \
1409 unit, base, exponent, 1, 0)
1410#define STATS_DESC_INSTANT(SCOPE, name, unit, base, exponent) \
1411 STATS_DESC(SCOPE, name, KVM_STATS_TYPE_INSTANT, \
1412 unit, base, exponent, 1, 0)
1413#define STATS_DESC_PEAK(SCOPE, name, unit, base, exponent) \
1414 STATS_DESC(SCOPE, name, KVM_STATS_TYPE_PEAK, \
1415 unit, base, exponent, 1, 0)
1416#define STATS_DESC_LINEAR_HIST(SCOPE, name, unit, base, exponent, sz, bsz) \
1417 STATS_DESC(SCOPE, name, KVM_STATS_TYPE_LINEAR_HIST, \
1418 unit, base, exponent, sz, bsz)
1419#define STATS_DESC_LOG_HIST(SCOPE, name, unit, base, exponent, sz) \
1420 STATS_DESC(SCOPE, name, KVM_STATS_TYPE_LOG_HIST, \
1421 unit, base, exponent, sz, 0)
1422
1423
1424#define STATS_DESC_COUNTER(SCOPE, name) \
1425 STATS_DESC_CUMULATIVE(SCOPE, name, KVM_STATS_UNIT_NONE, \
1426 KVM_STATS_BASE_POW10, 0)
1427
1428#define STATS_DESC_ICOUNTER(SCOPE, name) \
1429 STATS_DESC_INSTANT(SCOPE, name, KVM_STATS_UNIT_NONE, \
1430 KVM_STATS_BASE_POW10, 0)
1431
1432#define STATS_DESC_PCOUNTER(SCOPE, name) \
1433 STATS_DESC_PEAK(SCOPE, name, KVM_STATS_UNIT_NONE, \
1434 KVM_STATS_BASE_POW10, 0)
1435
1436
1437#define STATS_DESC_TIME_NSEC(SCOPE, name) \
1438 STATS_DESC_CUMULATIVE(SCOPE, name, KVM_STATS_UNIT_SECONDS, \
1439 KVM_STATS_BASE_POW10, -9)
1440
1441#define STATS_DESC_LINHIST_TIME_NSEC(SCOPE, name, sz, bsz) \
1442 STATS_DESC_LINEAR_HIST(SCOPE, name, KVM_STATS_UNIT_SECONDS, \
1443 KVM_STATS_BASE_POW10, -9, sz, bsz)
1444
1445#define STATS_DESC_LOGHIST_TIME_NSEC(SCOPE, name, sz) \
1446 STATS_DESC_LOG_HIST(SCOPE, name, KVM_STATS_UNIT_SECONDS, \
1447 KVM_STATS_BASE_POW10, -9, sz)
1448
1449#define KVM_GENERIC_VM_STATS() \
1450 STATS_DESC_COUNTER(VM_GENERIC, remote_tlb_flush), \
1451 STATS_DESC_COUNTER(VM_GENERIC, remote_tlb_flush_requests)
1452
1453#define KVM_GENERIC_VCPU_STATS() \
1454 STATS_DESC_COUNTER(VCPU_GENERIC, halt_successful_poll), \
1455 STATS_DESC_COUNTER(VCPU_GENERIC, halt_attempted_poll), \
1456 STATS_DESC_COUNTER(VCPU_GENERIC, halt_poll_invalid), \
1457 STATS_DESC_COUNTER(VCPU_GENERIC, halt_wakeup), \
1458 STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_success_ns), \
1459 STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_fail_ns), \
1460 STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_wait_ns), \
1461 STATS_DESC_LOGHIST_TIME_NSEC(VCPU_GENERIC, halt_poll_success_hist, \
1462 HALT_POLL_HIST_COUNT), \
1463 STATS_DESC_LOGHIST_TIME_NSEC(VCPU_GENERIC, halt_poll_fail_hist, \
1464 HALT_POLL_HIST_COUNT), \
1465 STATS_DESC_LOGHIST_TIME_NSEC(VCPU_GENERIC, halt_wait_hist, \
1466 HALT_POLL_HIST_COUNT)
1467
1468extern struct dentry *kvm_debugfs_dir;
1469
1470ssize_t kvm_stats_read(char *id, const struct kvm_stats_header *header,
1471 const struct _kvm_stats_desc *desc,
1472 void *stats, size_t size_stats,
1473 char __user *user_buffer, size_t size, loff_t *offset);
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484static inline void kvm_stats_linear_hist_update(u64 *data, size_t size,
1485 u64 value, size_t bucket_size)
1486{
1487 size_t index = div64_u64(value, bucket_size);
1488
1489 index = min(index, size - 1);
1490 ++data[index];
1491}
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501static inline void kvm_stats_log_hist_update(u64 *data, size_t size, u64 value)
1502{
1503 size_t index = fls64(value);
1504
1505 index = min(index, size - 1);
1506 ++data[index];
1507}
1508
1509#define KVM_STATS_LINEAR_HIST_UPDATE(array, value, bsize) \
1510 kvm_stats_linear_hist_update(array, ARRAY_SIZE(array), value, bsize)
1511#define KVM_STATS_LOG_HIST_UPDATE(array, value) \
1512 kvm_stats_log_hist_update(array, ARRAY_SIZE(array), value)
1513
1514
1515extern const struct kvm_stats_header kvm_vm_stats_header;
1516extern const struct _kvm_stats_desc kvm_vm_stats_desc[];
1517extern const struct kvm_stats_header kvm_vcpu_stats_header;
1518extern const struct _kvm_stats_desc kvm_vcpu_stats_desc[];
1519
1520#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1521static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
1522{
1523 if (unlikely(kvm->mmu_notifier_count))
1524 return 1;
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535 smp_rmb();
1536 if (kvm->mmu_notifier_seq != mmu_seq)
1537 return 1;
1538 return 0;
1539}
1540
1541static inline int mmu_notifier_retry_hva(struct kvm *kvm,
1542 unsigned long mmu_seq,
1543 unsigned long hva)
1544{
1545 lockdep_assert_held(&kvm->mmu_lock);
1546
1547
1548
1549
1550
1551
1552 if (unlikely(kvm->mmu_notifier_count) &&
1553 hva >= kvm->mmu_notifier_range_start &&
1554 hva < kvm->mmu_notifier_range_end)
1555 return 1;
1556 if (kvm->mmu_notifier_seq != mmu_seq)
1557 return 1;
1558 return 0;
1559}
1560#endif
1561
1562#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1563
1564#define KVM_MAX_IRQ_ROUTES 4096
1565
1566bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
1567int kvm_set_irq_routing(struct kvm *kvm,
1568 const struct kvm_irq_routing_entry *entries,
1569 unsigned nr,
1570 unsigned flags);
1571int kvm_set_routing_entry(struct kvm *kvm,
1572 struct kvm_kernel_irq_routing_entry *e,
1573 const struct kvm_irq_routing_entry *ue);
1574void kvm_free_irq_routing(struct kvm *kvm);
1575
1576#else
1577
1578static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1579
1580#endif
1581
1582int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1583
1584#ifdef CONFIG_HAVE_KVM_EVENTFD
1585
1586void kvm_eventfd_init(struct kvm *kvm);
1587int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1588
1589#ifdef CONFIG_HAVE_KVM_IRQFD
1590int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1591void kvm_irqfd_release(struct kvm *kvm);
1592void kvm_irq_routing_update(struct kvm *);
1593#else
1594static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1595{
1596 return -EINVAL;
1597}
1598
1599static inline void kvm_irqfd_release(struct kvm *kvm) {}
1600#endif
1601
1602#else
1603
1604static inline void kvm_eventfd_init(struct kvm *kvm) {}
1605
1606static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1607{
1608 return -EINVAL;
1609}
1610
1611static inline void kvm_irqfd_release(struct kvm *kvm) {}
1612
1613#ifdef CONFIG_HAVE_KVM_IRQCHIP
1614static inline void kvm_irq_routing_update(struct kvm *kvm)
1615{
1616}
1617#endif
1618
1619static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1620{
1621 return -ENOSYS;
1622}
1623
1624#endif
1625
1626void kvm_arch_irq_routing_update(struct kvm *kvm);
1627
1628static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1629{
1630
1631
1632
1633
1634 smp_wmb();
1635 set_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1636}
1637
1638static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
1639{
1640 return READ_ONCE(vcpu->requests);
1641}
1642
1643static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
1644{
1645 return test_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1646}
1647
1648static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
1649{
1650 clear_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1651}
1652
1653static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1654{
1655 if (kvm_test_request(req, vcpu)) {
1656 kvm_clear_request(req, vcpu);
1657
1658
1659
1660
1661
1662 smp_mb__after_atomic();
1663 return true;
1664 } else {
1665 return false;
1666 }
1667}
1668
1669extern bool kvm_rebooting;
1670
1671extern unsigned int halt_poll_ns;
1672extern unsigned int halt_poll_ns_grow;
1673extern unsigned int halt_poll_ns_grow_start;
1674extern unsigned int halt_poll_ns_shrink;
1675
1676struct kvm_device {
1677 const struct kvm_device_ops *ops;
1678 struct kvm *kvm;
1679 void *private;
1680 struct list_head vm_node;
1681};
1682
1683
1684struct kvm_device_ops {
1685 const char *name;
1686
1687
1688
1689
1690
1691
1692 int (*create)(struct kvm_device *dev, u32 type);
1693
1694
1695
1696
1697
1698 void (*init)(struct kvm_device *dev);
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708 void (*destroy)(struct kvm_device *dev);
1709
1710
1711
1712
1713
1714
1715
1716
1717 void (*release)(struct kvm_device *dev);
1718
1719 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1720 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1721 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1722 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1723 unsigned long arg);
1724 int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma);
1725};
1726
1727void kvm_device_get(struct kvm_device *dev);
1728void kvm_device_put(struct kvm_device *dev);
1729struct kvm_device *kvm_device_from_filp(struct file *filp);
1730int kvm_register_device_ops(const struct kvm_device_ops *ops, u32 type);
1731void kvm_unregister_device_ops(u32 type);
1732
1733extern struct kvm_device_ops kvm_mpic_ops;
1734extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1735extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1736
1737#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1738
1739static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1740{
1741 vcpu->spin_loop.in_spin_loop = val;
1742}
1743static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1744{
1745 vcpu->spin_loop.dy_eligible = val;
1746}
1747
1748#else
1749
1750static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1751{
1752}
1753
1754static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1755{
1756}
1757#endif
1758
1759static inline bool kvm_is_visible_memslot(struct kvm_memory_slot *memslot)
1760{
1761 return (memslot && memslot->id < KVM_USER_MEM_SLOTS &&
1762 !(memslot->flags & KVM_MEMSLOT_INVALID));
1763}
1764
1765struct kvm_vcpu *kvm_get_running_vcpu(void);
1766struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);
1767
1768#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1769bool kvm_arch_has_irq_bypass(void);
1770int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1771 struct irq_bypass_producer *);
1772void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1773 struct irq_bypass_producer *);
1774void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1775void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1776int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1777 uint32_t guest_irq, bool set);
1778bool kvm_arch_irqfd_route_changed(struct kvm_kernel_irq_routing_entry *,
1779 struct kvm_kernel_irq_routing_entry *);
1780#endif
1781
1782#ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1783
1784static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1785{
1786 return vcpu->valid_wakeup;
1787}
1788
1789#else
1790static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1791{
1792 return true;
1793}
1794#endif
1795
1796#ifdef CONFIG_HAVE_KVM_NO_POLL
1797
1798bool kvm_arch_no_poll(struct kvm_vcpu *vcpu);
1799#else
1800static inline bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
1801{
1802 return false;
1803}
1804#endif
1805
1806#ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
1807long kvm_arch_vcpu_async_ioctl(struct file *filp,
1808 unsigned int ioctl, unsigned long arg);
1809#else
1810static inline long kvm_arch_vcpu_async_ioctl(struct file *filp,
1811 unsigned int ioctl,
1812 unsigned long arg)
1813{
1814 return -ENOIOCTLCMD;
1815}
1816#endif
1817
1818void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
1819 unsigned long start, unsigned long end);
1820
1821#ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
1822int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu);
1823#else
1824static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
1825{
1826 return 0;
1827}
1828#endif
1829
1830typedef int (*kvm_vm_thread_fn_t)(struct kvm *kvm, uintptr_t data);
1831
1832int kvm_vm_create_worker_thread(struct kvm *kvm, kvm_vm_thread_fn_t thread_fn,
1833 uintptr_t data, const char *name,
1834 struct task_struct **thread_ptr);
1835
1836#ifdef CONFIG_KVM_XFER_TO_GUEST_WORK
1837static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu)
1838{
1839 vcpu->run->exit_reason = KVM_EXIT_INTR;
1840 vcpu->stat.signal_exits++;
1841}
1842#endif
1843
1844
1845
1846
1847
1848
1849#define KVM_DIRTY_RING_RSVD_ENTRIES 64
1850
1851
1852#define KVM_DIRTY_RING_MAX_ENTRIES 65536
1853
1854#endif
1855