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