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[zen-stable.git] / include / linux / kvm_host.h
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1 #ifndef __KVM_HOST_H
2 #define __KVM_HOST_H
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 */
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/mm.h>
17 #include <linux/preempt.h>
18 #include <linux/msi.h>
19 #include <linux/slab.h>
20 #include <linux/rcupdate.h>
21 #include <linux/ratelimit.h>
22 #include <asm/signal.h>
24 #include <linux/kvm.h>
25 #include <linux/kvm_para.h>
27 #include <linux/kvm_types.h>
29 #include <asm/kvm_host.h>
31 #ifndef KVM_MMIO_SIZE
32 #define KVM_MMIO_SIZE 8
33 #endif
36 * vcpu->requests bit members
38 #define KVM_REQ_TLB_FLUSH 0
39 #define KVM_REQ_MIGRATE_TIMER 1
40 #define KVM_REQ_REPORT_TPR_ACCESS 2
41 #define KVM_REQ_MMU_RELOAD 3
42 #define KVM_REQ_TRIPLE_FAULT 4
43 #define KVM_REQ_PENDING_TIMER 5
44 #define KVM_REQ_UNHALT 6
45 #define KVM_REQ_MMU_SYNC 7
46 #define KVM_REQ_CLOCK_UPDATE 8
47 #define KVM_REQ_KICK 9
48 #define KVM_REQ_DEACTIVATE_FPU 10
49 #define KVM_REQ_EVENT 11
50 #define KVM_REQ_APF_HALT 12
51 #define KVM_REQ_STEAL_UPDATE 13
52 #define KVM_REQ_NMI 14
54 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
56 struct kvm;
57 struct kvm_vcpu;
58 extern struct kmem_cache *kvm_vcpu_cache;
60 struct kvm_io_range {
61 gpa_t addr;
62 int len;
63 struct kvm_io_device *dev;
66 struct kvm_io_bus {
67 int dev_count;
68 #define NR_IOBUS_DEVS 300
69 struct kvm_io_range range[NR_IOBUS_DEVS];
72 enum kvm_bus {
73 KVM_MMIO_BUS,
74 KVM_PIO_BUS,
75 KVM_NR_BUSES
78 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
79 int len, const void *val);
80 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
81 void *val);
82 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
83 int len, struct kvm_io_device *dev);
84 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
85 struct kvm_io_device *dev);
87 #ifdef CONFIG_KVM_ASYNC_PF
88 struct kvm_async_pf {
89 struct work_struct work;
90 struct list_head link;
91 struct list_head queue;
92 struct kvm_vcpu *vcpu;
93 struct mm_struct *mm;
94 gva_t gva;
95 unsigned long addr;
96 struct kvm_arch_async_pf arch;
97 struct page *page;
98 bool done;
101 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
102 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
103 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
104 struct kvm_arch_async_pf *arch);
105 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
106 #endif
108 enum {
109 OUTSIDE_GUEST_MODE,
110 IN_GUEST_MODE,
111 EXITING_GUEST_MODE
114 struct kvm_vcpu {
115 struct kvm *kvm;
116 #ifdef CONFIG_PREEMPT_NOTIFIERS
117 struct preempt_notifier preempt_notifier;
118 #endif
119 int cpu;
120 int vcpu_id;
121 int srcu_idx;
122 int mode;
123 unsigned long requests;
124 unsigned long guest_debug;
126 struct mutex mutex;
127 struct kvm_run *run;
129 int fpu_active;
130 int guest_fpu_loaded, guest_xcr0_loaded;
131 wait_queue_head_t wq;
132 struct pid *pid;
133 int sigset_active;
134 sigset_t sigset;
135 struct kvm_vcpu_stat stat;
137 #ifdef CONFIG_HAS_IOMEM
138 int mmio_needed;
139 int mmio_read_completed;
140 int mmio_is_write;
141 int mmio_size;
142 int mmio_index;
143 unsigned char mmio_data[KVM_MMIO_SIZE];
144 gpa_t mmio_phys_addr;
145 #endif
147 #ifdef CONFIG_KVM_ASYNC_PF
148 struct {
149 u32 queued;
150 struct list_head queue;
151 struct list_head done;
152 spinlock_t lock;
153 } async_pf;
154 #endif
156 struct kvm_vcpu_arch arch;
159 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
161 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
165 * Some of the bitops functions do not support too long bitmaps.
166 * This number must be determined not to exceed such limits.
168 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
170 struct kvm_lpage_info {
171 unsigned long rmap_pde;
172 int write_count;
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 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
183 unsigned long userspace_addr;
184 int user_alloc;
185 int id;
188 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
190 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
193 struct kvm_kernel_irq_routing_entry {
194 u32 gsi;
195 u32 type;
196 int (*set)(struct kvm_kernel_irq_routing_entry *e,
197 struct kvm *kvm, int irq_source_id, int level);
198 union {
199 struct {
200 unsigned irqchip;
201 unsigned pin;
202 } irqchip;
203 struct msi_msg msi;
205 struct hlist_node link;
208 #ifdef __KVM_HAVE_IOAPIC
210 struct kvm_irq_routing_table {
211 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
212 struct kvm_kernel_irq_routing_entry *rt_entries;
213 u32 nr_rt_entries;
215 * Array indexed by gsi. Each entry contains list of irq chips
216 * the gsi is connected to.
218 struct hlist_head map[0];
221 #else
223 struct kvm_irq_routing_table {};
225 #endif
227 struct kvm_memslots {
228 int nmemslots;
229 u64 generation;
230 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
231 KVM_PRIVATE_MEM_SLOTS];
234 struct kvm {
235 spinlock_t mmu_lock;
236 struct mutex slots_lock;
237 struct mm_struct *mm; /* userspace tied to this vm */
238 struct kvm_memslots *memslots;
239 struct srcu_struct srcu;
240 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
241 u32 bsp_vcpu_id;
242 struct kvm_vcpu *bsp_vcpu;
243 #endif
244 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
245 atomic_t online_vcpus;
246 int last_boosted_vcpu;
247 struct list_head vm_list;
248 struct mutex lock;
249 struct kvm_io_bus *buses[KVM_NR_BUSES];
250 #ifdef CONFIG_HAVE_KVM_EVENTFD
251 struct {
252 spinlock_t lock;
253 struct list_head items;
254 } irqfds;
255 struct list_head ioeventfds;
256 #endif
257 struct kvm_vm_stat stat;
258 struct kvm_arch arch;
259 atomic_t users_count;
260 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
261 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
262 spinlock_t ring_lock;
263 struct list_head coalesced_zones;
264 #endif
266 struct mutex irq_lock;
267 #ifdef CONFIG_HAVE_KVM_IRQCHIP
269 * Update side is protected by irq_lock and,
270 * if configured, irqfds.lock.
272 struct kvm_irq_routing_table __rcu *irq_routing;
273 struct hlist_head mask_notifier_list;
274 struct hlist_head irq_ack_notifier_list;
275 #endif
277 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
278 struct mmu_notifier mmu_notifier;
279 unsigned long mmu_notifier_seq;
280 long mmu_notifier_count;
281 #endif
282 long tlbs_dirty;
285 /* The guest did something we don't support. */
286 #define pr_unimpl(vcpu, fmt, ...) \
287 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
288 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
290 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
291 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
293 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
295 smp_rmb();
296 return kvm->vcpus[i];
299 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
300 for (idx = 0; \
301 idx < atomic_read(&kvm->online_vcpus) && \
302 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
303 idx++)
305 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
306 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
308 void vcpu_load(struct kvm_vcpu *vcpu);
309 void vcpu_put(struct kvm_vcpu *vcpu);
311 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
312 struct module *module);
313 void kvm_exit(void);
315 void kvm_get_kvm(struct kvm *kvm);
316 void kvm_put_kvm(struct kvm *kvm);
318 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
320 return rcu_dereference_check(kvm->memslots,
321 srcu_read_lock_held(&kvm->srcu)
322 || lockdep_is_held(&kvm->slots_lock));
325 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
326 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
327 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
329 extern struct page *bad_page;
330 extern struct page *fault_page;
332 extern pfn_t bad_pfn;
333 extern pfn_t fault_pfn;
335 int is_error_page(struct page *page);
336 int is_error_pfn(pfn_t pfn);
337 int is_hwpoison_pfn(pfn_t pfn);
338 int is_fault_pfn(pfn_t pfn);
339 int is_noslot_pfn(pfn_t pfn);
340 int is_invalid_pfn(pfn_t pfn);
341 int kvm_is_error_hva(unsigned long addr);
342 int kvm_set_memory_region(struct kvm *kvm,
343 struct kvm_userspace_memory_region *mem,
344 int user_alloc);
345 int __kvm_set_memory_region(struct kvm *kvm,
346 struct kvm_userspace_memory_region *mem,
347 int user_alloc);
348 int kvm_arch_prepare_memory_region(struct kvm *kvm,
349 struct kvm_memory_slot *memslot,
350 struct kvm_memory_slot old,
351 struct kvm_userspace_memory_region *mem,
352 int user_alloc);
353 void kvm_arch_commit_memory_region(struct kvm *kvm,
354 struct kvm_userspace_memory_region *mem,
355 struct kvm_memory_slot old,
356 int user_alloc);
357 void kvm_disable_largepages(void);
358 void kvm_arch_flush_shadow(struct kvm *kvm);
360 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
361 int nr_pages);
363 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
364 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
365 void kvm_release_page_clean(struct page *page);
366 void kvm_release_page_dirty(struct page *page);
367 void kvm_set_page_dirty(struct page *page);
368 void kvm_set_page_accessed(struct page *page);
370 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
371 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
372 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
373 bool write_fault, bool *writable);
374 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
375 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
376 bool *writable);
377 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
378 struct kvm_memory_slot *slot, gfn_t gfn);
379 void kvm_release_pfn_dirty(pfn_t);
380 void kvm_release_pfn_clean(pfn_t pfn);
381 void kvm_set_pfn_dirty(pfn_t pfn);
382 void kvm_set_pfn_accessed(pfn_t pfn);
383 void kvm_get_pfn(pfn_t pfn);
385 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
386 int len);
387 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
388 unsigned long len);
389 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
390 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
391 void *data, unsigned long len);
392 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
393 int offset, int len);
394 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
395 unsigned long len);
396 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
397 void *data, unsigned long len);
398 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
399 gpa_t gpa);
400 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
401 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
402 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
403 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
404 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
405 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
406 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
407 gfn_t gfn);
409 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
410 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
411 void kvm_resched(struct kvm_vcpu *vcpu);
412 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
413 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
415 void kvm_flush_remote_tlbs(struct kvm *kvm);
416 void kvm_reload_remote_mmus(struct kvm *kvm);
418 long kvm_arch_dev_ioctl(struct file *filp,
419 unsigned int ioctl, unsigned long arg);
420 long kvm_arch_vcpu_ioctl(struct file *filp,
421 unsigned int ioctl, unsigned long arg);
423 int kvm_dev_ioctl_check_extension(long ext);
425 int kvm_get_dirty_log(struct kvm *kvm,
426 struct kvm_dirty_log *log, int *is_dirty);
427 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
428 struct kvm_dirty_log *log);
430 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
431 struct
432 kvm_userspace_memory_region *mem,
433 int user_alloc);
434 long kvm_arch_vm_ioctl(struct file *filp,
435 unsigned int ioctl, unsigned long arg);
437 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
438 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
440 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
441 struct kvm_translation *tr);
443 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
444 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
445 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
446 struct kvm_sregs *sregs);
447 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
448 struct kvm_sregs *sregs);
449 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
450 struct kvm_mp_state *mp_state);
451 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
452 struct kvm_mp_state *mp_state);
453 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
454 struct kvm_guest_debug *dbg);
455 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
457 int kvm_arch_init(void *opaque);
458 void kvm_arch_exit(void);
460 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
461 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
463 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
464 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
465 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
466 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
467 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
468 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
470 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
471 int kvm_arch_hardware_enable(void *garbage);
472 void kvm_arch_hardware_disable(void *garbage);
473 int kvm_arch_hardware_setup(void);
474 void kvm_arch_hardware_unsetup(void);
475 void kvm_arch_check_processor_compat(void *rtn);
476 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
478 void kvm_free_physmem(struct kvm *kvm);
480 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
481 static inline struct kvm *kvm_arch_alloc_vm(void)
483 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
486 static inline void kvm_arch_free_vm(struct kvm *kvm)
488 kfree(kvm);
490 #endif
492 int kvm_arch_init_vm(struct kvm *kvm);
493 void kvm_arch_destroy_vm(struct kvm *kvm);
494 void kvm_free_all_assigned_devices(struct kvm *kvm);
495 void kvm_arch_sync_events(struct kvm *kvm);
497 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
498 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
500 int kvm_is_mmio_pfn(pfn_t pfn);
502 struct kvm_irq_ack_notifier {
503 struct hlist_node link;
504 unsigned gsi;
505 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
508 struct kvm_assigned_dev_kernel {
509 struct kvm_irq_ack_notifier ack_notifier;
510 struct list_head list;
511 int assigned_dev_id;
512 int host_segnr;
513 int host_busnr;
514 int host_devfn;
515 unsigned int entries_nr;
516 int host_irq;
517 bool host_irq_disabled;
518 struct msix_entry *host_msix_entries;
519 int guest_irq;
520 struct msix_entry *guest_msix_entries;
521 unsigned long irq_requested_type;
522 int irq_source_id;
523 int flags;
524 struct pci_dev *dev;
525 struct kvm *kvm;
526 spinlock_t intx_lock;
527 char irq_name[32];
528 struct pci_saved_state *pci_saved_state;
531 struct kvm_irq_mask_notifier {
532 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
533 int irq;
534 struct hlist_node link;
537 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
538 struct kvm_irq_mask_notifier *kimn);
539 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
540 struct kvm_irq_mask_notifier *kimn);
541 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
542 bool mask);
544 #ifdef __KVM_HAVE_IOAPIC
545 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
546 union kvm_ioapic_redirect_entry *entry,
547 unsigned long *deliver_bitmask);
548 #endif
549 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
550 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
551 int irq_source_id, int level);
552 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
553 void kvm_register_irq_ack_notifier(struct kvm *kvm,
554 struct kvm_irq_ack_notifier *kian);
555 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
556 struct kvm_irq_ack_notifier *kian);
557 int kvm_request_irq_source_id(struct kvm *kvm);
558 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
560 /* For vcpu->arch.iommu_flags */
561 #define KVM_IOMMU_CACHE_COHERENCY 0x1
563 #ifdef CONFIG_IOMMU_API
564 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
565 int kvm_iommu_map_guest(struct kvm *kvm);
566 int kvm_iommu_unmap_guest(struct kvm *kvm);
567 int kvm_assign_device(struct kvm *kvm,
568 struct kvm_assigned_dev_kernel *assigned_dev);
569 int kvm_deassign_device(struct kvm *kvm,
570 struct kvm_assigned_dev_kernel *assigned_dev);
571 #else /* CONFIG_IOMMU_API */
572 static inline int kvm_iommu_map_pages(struct kvm *kvm,
573 struct kvm_memory_slot *slot)
575 return 0;
578 static inline int kvm_iommu_map_guest(struct kvm *kvm)
580 return -ENODEV;
583 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
585 return 0;
588 static inline int kvm_assign_device(struct kvm *kvm,
589 struct kvm_assigned_dev_kernel *assigned_dev)
591 return 0;
594 static inline int kvm_deassign_device(struct kvm *kvm,
595 struct kvm_assigned_dev_kernel *assigned_dev)
597 return 0;
599 #endif /* CONFIG_IOMMU_API */
601 static inline void kvm_guest_enter(void)
603 BUG_ON(preemptible());
604 account_system_vtime(current);
605 current->flags |= PF_VCPU;
606 /* KVM does not hold any references to rcu protected data when it
607 * switches CPU into a guest mode. In fact switching to a guest mode
608 * is very similar to exiting to userspase from rcu point of view. In
609 * addition CPU may stay in a guest mode for quite a long time (up to
610 * one time slice). Lets treat guest mode as quiescent state, just like
611 * we do with user-mode execution.
613 rcu_virt_note_context_switch(smp_processor_id());
616 static inline void kvm_guest_exit(void)
618 account_system_vtime(current);
619 current->flags &= ~PF_VCPU;
622 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
624 return gfn_to_memslot(kvm, gfn)->id;
627 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
628 gfn_t gfn)
630 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
633 static inline gpa_t gfn_to_gpa(gfn_t gfn)
635 return (gpa_t)gfn << PAGE_SHIFT;
638 static inline gfn_t gpa_to_gfn(gpa_t gpa)
640 return (gfn_t)(gpa >> PAGE_SHIFT);
643 static inline hpa_t pfn_to_hpa(pfn_t pfn)
645 return (hpa_t)pfn << PAGE_SHIFT;
648 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
650 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
653 enum kvm_stat_kind {
654 KVM_STAT_VM,
655 KVM_STAT_VCPU,
658 struct kvm_stats_debugfs_item {
659 const char *name;
660 int offset;
661 enum kvm_stat_kind kind;
662 struct dentry *dentry;
664 extern struct kvm_stats_debugfs_item debugfs_entries[];
665 extern struct dentry *kvm_debugfs_dir;
667 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
668 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
670 if (unlikely(vcpu->kvm->mmu_notifier_count))
671 return 1;
673 * Both reads happen under the mmu_lock and both values are
674 * modified under mmu_lock, so there's no need of smb_rmb()
675 * here in between, otherwise mmu_notifier_count should be
676 * read before mmu_notifier_seq, see
677 * mmu_notifier_invalidate_range_end write side.
679 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
680 return 1;
681 return 0;
683 #endif
685 #ifdef CONFIG_HAVE_KVM_IRQCHIP
687 #define KVM_MAX_IRQ_ROUTES 1024
689 int kvm_setup_default_irq_routing(struct kvm *kvm);
690 int kvm_set_irq_routing(struct kvm *kvm,
691 const struct kvm_irq_routing_entry *entries,
692 unsigned nr,
693 unsigned flags);
694 void kvm_free_irq_routing(struct kvm *kvm);
696 #else
698 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
700 #endif
702 #ifdef CONFIG_HAVE_KVM_EVENTFD
704 void kvm_eventfd_init(struct kvm *kvm);
705 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
706 void kvm_irqfd_release(struct kvm *kvm);
707 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
708 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
710 #else
712 static inline void kvm_eventfd_init(struct kvm *kvm) {}
714 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
716 return -EINVAL;
719 static inline void kvm_irqfd_release(struct kvm *kvm) {}
721 #ifdef CONFIG_HAVE_KVM_IRQCHIP
722 static inline void kvm_irq_routing_update(struct kvm *kvm,
723 struct kvm_irq_routing_table *irq_rt)
725 rcu_assign_pointer(kvm->irq_routing, irq_rt);
727 #endif
729 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
731 return -ENOSYS;
734 #endif /* CONFIG_HAVE_KVM_EVENTFD */
736 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
737 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
739 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
741 #endif
743 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
745 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
746 unsigned long arg);
748 #else
750 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
751 unsigned long arg)
753 return -ENOTTY;
756 #endif
758 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
760 set_bit(req, &vcpu->requests);
763 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
765 if (test_bit(req, &vcpu->requests)) {
766 clear_bit(req, &vcpu->requests);
767 return true;
768 } else {
769 return false;
773 #endif