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Merge tag 'vfio-v3.9-rc4' of git://github.com/awilliam/linux-vfio
[deliverable/linux.git] / include / linux / kvm_host.h
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CommitLineData
1#ifndef __KVM_HOST_H
2#define __KVM_HOST_H
3
4#if IS_ENABLED(CONFIG_KVM)
5
6/*
7 * This work is licensed under the terms of the GNU GPL, version 2. See
8 * the COPYING file in the top-level directory.
9 */
10
11#include <linux/types.h>
12#include <linux/hardirq.h>
13#include <linux/list.h>
14#include <linux/mutex.h>
15#include <linux/spinlock.h>
16#include <linux/signal.h>
17#include <linux/sched.h>
18#include <linux/bug.h>
19#include <linux/mm.h>
20#include <linux/mmu_notifier.h>
21#include <linux/preempt.h>
22#include <linux/msi.h>
23#include <linux/slab.h>
24#include <linux/rcupdate.h>
25#include <linux/ratelimit.h>
26#include <linux/err.h>
27#include <linux/irqflags.h>
28#include <asm/signal.h>
29
30#include <linux/kvm.h>
31#include <linux/kvm_para.h>
32
33#include <linux/kvm_types.h>
34
35#include <asm/kvm_host.h>
36
37#ifndef KVM_MMIO_SIZE
38#define KVM_MMIO_SIZE 8
39#endif
40
41/*
42 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
43 * in kvm, other bits are visible for userspace which are defined in
44 * include/linux/kvm_h.
45 */
46#define KVM_MEMSLOT_INVALID (1UL << 16)
47
48/* Two fragments for cross MMIO pages. */
49#define KVM_MAX_MMIO_FRAGMENTS 2
50
51/*
52 * For the normal pfn, the highest 12 bits should be zero,
53 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
54 * mask bit 63 to indicate the noslot pfn.
55 */
56#define KVM_PFN_ERR_MASK (0x7ffULL << 52)
57#define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
58#define KVM_PFN_NOSLOT (0x1ULL << 63)
59
60#define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
61#define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
62#define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
63
64/*
65 * error pfns indicate that the gfn is in slot but faild to
66 * translate it to pfn on host.
67 */
68static inline bool is_error_pfn(pfn_t pfn)
69{
70 return !!(pfn & KVM_PFN_ERR_MASK);
71}
72
73/*
74 * error_noslot pfns indicate that the gfn can not be
75 * translated to pfn - it is not in slot or failed to
76 * translate it to pfn.
77 */
78static inline bool is_error_noslot_pfn(pfn_t pfn)
79{
80 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
81}
82
83/* noslot pfn indicates that the gfn is not in slot. */
84static inline bool is_noslot_pfn(pfn_t pfn)
85{
86 return pfn == KVM_PFN_NOSLOT;
87}
88
89#define KVM_HVA_ERR_BAD (PAGE_OFFSET)
90#define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
91
92static inline bool kvm_is_error_hva(unsigned long addr)
93{
94 return addr >= PAGE_OFFSET;
95}
96
97#define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
98
99static inline bool is_error_page(struct page *page)
100{
101 return IS_ERR(page);
102}
103
104/*
105 * vcpu->requests bit members
106 */
107#define KVM_REQ_TLB_FLUSH 0
108#define KVM_REQ_MIGRATE_TIMER 1
109#define KVM_REQ_REPORT_TPR_ACCESS 2
110#define KVM_REQ_MMU_RELOAD 3
111#define KVM_REQ_TRIPLE_FAULT 4
112#define KVM_REQ_PENDING_TIMER 5
113#define KVM_REQ_UNHALT 6
114#define KVM_REQ_MMU_SYNC 7
115#define KVM_REQ_CLOCK_UPDATE 8
116#define KVM_REQ_KICK 9
117#define KVM_REQ_DEACTIVATE_FPU 10
118#define KVM_REQ_EVENT 11
119#define KVM_REQ_APF_HALT 12
120#define KVM_REQ_STEAL_UPDATE 13
121#define KVM_REQ_NMI 14
122#define KVM_REQ_IMMEDIATE_EXIT 15
123#define KVM_REQ_PMU 16
124#define KVM_REQ_PMI 17
125#define KVM_REQ_WATCHDOG 18
126#define KVM_REQ_MASTERCLOCK_UPDATE 19
127#define KVM_REQ_MCLOCK_INPROGRESS 20
128#define KVM_REQ_EPR_EXIT 21
129#define KVM_REQ_EOIBITMAP 22
130
131#define KVM_USERSPACE_IRQ_SOURCE_ID 0
132#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
133
134struct kvm;
135struct kvm_vcpu;
136extern struct kmem_cache *kvm_vcpu_cache;
137
138struct kvm_io_range {
139 gpa_t addr;
140 int len;
141 struct kvm_io_device *dev;
142};
143
144#define NR_IOBUS_DEVS 1000
145
146struct kvm_io_bus {
147 int dev_count;
148 struct kvm_io_range range[];
149};
150
151enum kvm_bus {
152 KVM_MMIO_BUS,
153 KVM_PIO_BUS,
154 KVM_NR_BUSES
155};
156
157int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
158 int len, const void *val);
159int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
160 void *val);
161int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
162 int len, struct kvm_io_device *dev);
163int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
164 struct kvm_io_device *dev);
165
166#ifdef CONFIG_KVM_ASYNC_PF
167struct kvm_async_pf {
168 struct work_struct work;
169 struct list_head link;
170 struct list_head queue;
171 struct kvm_vcpu *vcpu;
172 struct mm_struct *mm;
173 gva_t gva;
174 unsigned long addr;
175 struct kvm_arch_async_pf arch;
176 struct page *page;
177 bool done;
178};
179
180void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
181void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
182int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
183 struct kvm_arch_async_pf *arch);
184int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
185#endif
186
187enum {
188 OUTSIDE_GUEST_MODE,
189 IN_GUEST_MODE,
190 EXITING_GUEST_MODE,
191 READING_SHADOW_PAGE_TABLES,
192};
193
194/*
195 * Sometimes a large or cross-page mmio needs to be broken up into separate
196 * exits for userspace servicing.
197 */
198struct kvm_mmio_fragment {
199 gpa_t gpa;
200 void *data;
201 unsigned len;
202};
203
204struct kvm_vcpu {
205 struct kvm *kvm;
206#ifdef CONFIG_PREEMPT_NOTIFIERS
207 struct preempt_notifier preempt_notifier;
208#endif
209 int cpu;
210 int vcpu_id;
211 int srcu_idx;
212 int mode;
213 unsigned long requests;
214 unsigned long guest_debug;
215
216 struct mutex mutex;
217 struct kvm_run *run;
218
219 int fpu_active;
220 int guest_fpu_loaded, guest_xcr0_loaded;
221 wait_queue_head_t wq;
222 struct pid *pid;
223 int sigset_active;
224 sigset_t sigset;
225 struct kvm_vcpu_stat stat;
226
227#ifdef CONFIG_HAS_IOMEM
228 int mmio_needed;
229 int mmio_read_completed;
230 int mmio_is_write;
231 int mmio_cur_fragment;
232 int mmio_nr_fragments;
233 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
234#endif
235
236#ifdef CONFIG_KVM_ASYNC_PF
237 struct {
238 u32 queued;
239 struct list_head queue;
240 struct list_head done;
241 spinlock_t lock;
242 } async_pf;
243#endif
244
245#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
246 /*
247 * Cpu relax intercept or pause loop exit optimization
248 * in_spin_loop: set when a vcpu does a pause loop exit
249 * or cpu relax intercepted.
250 * dy_eligible: indicates whether vcpu is eligible for directed yield.
251 */
252 struct {
253 bool in_spin_loop;
254 bool dy_eligible;
255 } spin_loop;
256#endif
257 struct kvm_vcpu_arch arch;
258};
259
260static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
261{
262 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
263}
264
265/*
266 * Some of the bitops functions do not support too long bitmaps.
267 * This number must be determined not to exceed such limits.
268 */
269#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
270
271struct kvm_memory_slot {
272 gfn_t base_gfn;
273 unsigned long npages;
274 unsigned long *dirty_bitmap;
275 struct kvm_arch_memory_slot arch;
276 unsigned long userspace_addr;
277 u32 flags;
278 short id;
279};
280
281static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
282{
283 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
284}
285
286struct kvm_kernel_irq_routing_entry {
287 u32 gsi;
288 u32 type;
289 int (*set)(struct kvm_kernel_irq_routing_entry *e,
290 struct kvm *kvm, int irq_source_id, int level);
291 union {
292 struct {
293 unsigned irqchip;
294 unsigned pin;
295 } irqchip;
296 struct msi_msg msi;
297 };
298 struct hlist_node link;
299};
300
301#ifdef __KVM_HAVE_IOAPIC
302
303struct kvm_irq_routing_table {
304 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
305 struct kvm_kernel_irq_routing_entry *rt_entries;
306 u32 nr_rt_entries;
307 /*
308 * Array indexed by gsi. Each entry contains list of irq chips
309 * the gsi is connected to.
310 */
311 struct hlist_head map[0];
312};
313
314#else
315
316struct kvm_irq_routing_table {};
317
318#endif
319
320#ifndef KVM_PRIVATE_MEM_SLOTS
321#define KVM_PRIVATE_MEM_SLOTS 0
322#endif
323
324#ifndef KVM_MEM_SLOTS_NUM
325#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
326#endif
327
328/*
329 * Note:
330 * memslots are not sorted by id anymore, please use id_to_memslot()
331 * to get the memslot by its id.
332 */
333struct kvm_memslots {
334 u64 generation;
335 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
336 /* The mapping table from slot id to the index in memslots[]. */
337 short id_to_index[KVM_MEM_SLOTS_NUM];
338};
339
340struct kvm {
341 spinlock_t mmu_lock;
342 struct mutex slots_lock;
343 struct mm_struct *mm; /* userspace tied to this vm */
344 struct kvm_memslots *memslots;
345 struct srcu_struct srcu;
346#ifdef CONFIG_KVM_APIC_ARCHITECTURE
347 u32 bsp_vcpu_id;
348#endif
349 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
350 atomic_t online_vcpus;
351 int last_boosted_vcpu;
352 struct list_head vm_list;
353 struct mutex lock;
354 struct kvm_io_bus *buses[KVM_NR_BUSES];
355#ifdef CONFIG_HAVE_KVM_EVENTFD
356 struct {
357 spinlock_t lock;
358 struct list_head items;
359 struct list_head resampler_list;
360 struct mutex resampler_lock;
361 } irqfds;
362 struct list_head ioeventfds;
363#endif
364 struct kvm_vm_stat stat;
365 struct kvm_arch arch;
366 atomic_t users_count;
367#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
368 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
369 spinlock_t ring_lock;
370 struct list_head coalesced_zones;
371#endif
372
373 struct mutex irq_lock;
374#ifdef CONFIG_HAVE_KVM_IRQCHIP
375 /*
376 * Update side is protected by irq_lock and,
377 * if configured, irqfds.lock.
378 */
379 struct kvm_irq_routing_table __rcu *irq_routing;
380 struct hlist_head mask_notifier_list;
381 struct hlist_head irq_ack_notifier_list;
382#endif
383
384#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
385 struct mmu_notifier mmu_notifier;
386 unsigned long mmu_notifier_seq;
387 long mmu_notifier_count;
388#endif
389 long tlbs_dirty;
390};
391
392#define kvm_err(fmt, ...) \
393 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
394#define kvm_info(fmt, ...) \
395 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
396#define kvm_debug(fmt, ...) \
397 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
398#define kvm_pr_unimpl(fmt, ...) \
399 pr_err_ratelimited("kvm [%i]: " fmt, \
400 task_tgid_nr(current), ## __VA_ARGS__)
401
402/* The guest did something we don't support. */
403#define vcpu_unimpl(vcpu, fmt, ...) \
404 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
405
406static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
407{
408 smp_rmb();
409 return kvm->vcpus[i];
410}
411
412#define kvm_for_each_vcpu(idx, vcpup, kvm) \
413 for (idx = 0; \
414 idx < atomic_read(&kvm->online_vcpus) && \
415 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
416 idx++)
417
418#define kvm_for_each_memslot(memslot, slots) \
419 for (memslot = &slots->memslots[0]; \
420 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
421 memslot++)
422
423int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
424void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
425
426int __must_check vcpu_load(struct kvm_vcpu *vcpu);
427void vcpu_put(struct kvm_vcpu *vcpu);
428
429int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
430 struct module *module);
431void kvm_exit(void);
432
433void kvm_get_kvm(struct kvm *kvm);
434void kvm_put_kvm(struct kvm *kvm);
435void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
436 u64 last_generation);
437
438static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
439{
440 return rcu_dereference_check(kvm->memslots,
441 srcu_read_lock_held(&kvm->srcu)
442 || lockdep_is_held(&kvm->slots_lock));
443}
444
445static inline struct kvm_memory_slot *
446id_to_memslot(struct kvm_memslots *slots, int id)
447{
448 int index = slots->id_to_index[id];
449 struct kvm_memory_slot *slot;
450
451 slot = &slots->memslots[index];
452
453 WARN_ON(slot->id != id);
454 return slot;
455}
456
457int kvm_set_memory_region(struct kvm *kvm,
458 struct kvm_userspace_memory_region *mem,
459 bool user_alloc);
460int __kvm_set_memory_region(struct kvm *kvm,
461 struct kvm_userspace_memory_region *mem,
462 bool user_alloc);
463void kvm_arch_free_memslot(struct kvm_memory_slot *free,
464 struct kvm_memory_slot *dont);
465int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
466int kvm_arch_prepare_memory_region(struct kvm *kvm,
467 struct kvm_memory_slot *memslot,
468 struct kvm_memory_slot old,
469 struct kvm_userspace_memory_region *mem,
470 bool user_alloc);
471void kvm_arch_commit_memory_region(struct kvm *kvm,
472 struct kvm_userspace_memory_region *mem,
473 struct kvm_memory_slot old,
474 bool user_alloc);
475bool kvm_largepages_enabled(void);
476void kvm_disable_largepages(void);
477/* flush all memory translations */
478void kvm_arch_flush_shadow_all(struct kvm *kvm);
479/* flush memory translations pointing to 'slot' */
480void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
481 struct kvm_memory_slot *slot);
482
483int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
484 int nr_pages);
485
486struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
487unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
488unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
489void kvm_release_page_clean(struct page *page);
490void kvm_release_page_dirty(struct page *page);
491void kvm_set_page_dirty(struct page *page);
492void kvm_set_page_accessed(struct page *page);
493
494pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
495pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
496 bool write_fault, bool *writable);
497pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
498pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
499 bool *writable);
500pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
501pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
502
503void kvm_release_pfn_dirty(pfn_t pfn);
504void kvm_release_pfn_clean(pfn_t pfn);
505void kvm_set_pfn_dirty(pfn_t pfn);
506void kvm_set_pfn_accessed(pfn_t pfn);
507void kvm_get_pfn(pfn_t pfn);
508
509int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
510 int len);
511int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
512 unsigned long len);
513int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
514int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
515 void *data, unsigned long len);
516int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
517 int offset, int len);
518int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
519 unsigned long len);
520int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
521 void *data, unsigned long len);
522int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
523 gpa_t gpa);
524int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
525int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
526struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
527int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
528unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
529void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
530void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
531 gfn_t gfn);
532
533void kvm_vcpu_block(struct kvm_vcpu *vcpu);
534void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
535bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
536void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
537void kvm_resched(struct kvm_vcpu *vcpu);
538void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
539void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
540
541void kvm_flush_remote_tlbs(struct kvm *kvm);
542void kvm_reload_remote_mmus(struct kvm *kvm);
543void kvm_make_mclock_inprogress_request(struct kvm *kvm);
544void kvm_make_update_eoibitmap_request(struct kvm *kvm);
545
546long kvm_arch_dev_ioctl(struct file *filp,
547 unsigned int ioctl, unsigned long arg);
548long kvm_arch_vcpu_ioctl(struct file *filp,
549 unsigned int ioctl, unsigned long arg);
550int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
551
552int kvm_dev_ioctl_check_extension(long ext);
553
554int kvm_get_dirty_log(struct kvm *kvm,
555 struct kvm_dirty_log *log, int *is_dirty);
556int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
557 struct kvm_dirty_log *log);
558
559int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
560 struct
561 kvm_userspace_memory_region *mem,
562 bool user_alloc);
563int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
564long kvm_arch_vm_ioctl(struct file *filp,
565 unsigned int ioctl, unsigned long arg);
566
567int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
568int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
569
570int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
571 struct kvm_translation *tr);
572
573int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
574int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
575int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
576 struct kvm_sregs *sregs);
577int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
578 struct kvm_sregs *sregs);
579int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
580 struct kvm_mp_state *mp_state);
581int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
582 struct kvm_mp_state *mp_state);
583int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
584 struct kvm_guest_debug *dbg);
585int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
586
587int kvm_arch_init(void *opaque);
588void kvm_arch_exit(void);
589
590int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
591void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
592
593void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
594void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
595void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
596struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
597int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
598int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
599void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
600
601int kvm_arch_hardware_enable(void *garbage);
602void kvm_arch_hardware_disable(void *garbage);
603int kvm_arch_hardware_setup(void);
604void kvm_arch_hardware_unsetup(void);
605void kvm_arch_check_processor_compat(void *rtn);
606int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
607int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
608
609void kvm_free_physmem(struct kvm *kvm);
610
611void *kvm_kvzalloc(unsigned long size);
612void kvm_kvfree(const void *addr);
613
614#ifndef __KVM_HAVE_ARCH_VM_ALLOC
615static inline struct kvm *kvm_arch_alloc_vm(void)
616{
617 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
618}
619
620static inline void kvm_arch_free_vm(struct kvm *kvm)
621{
622 kfree(kvm);
623}
624#endif
625
626static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
627{
628#ifdef __KVM_HAVE_ARCH_WQP
629 return vcpu->arch.wqp;
630#else
631 return &vcpu->wq;
632#endif
633}
634
635int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
636void kvm_arch_destroy_vm(struct kvm *kvm);
637void kvm_free_all_assigned_devices(struct kvm *kvm);
638void kvm_arch_sync_events(struct kvm *kvm);
639
640int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
641void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
642
643bool kvm_is_mmio_pfn(pfn_t pfn);
644
645struct kvm_irq_ack_notifier {
646 struct hlist_node link;
647 unsigned gsi;
648 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
649};
650
651struct kvm_assigned_dev_kernel {
652 struct kvm_irq_ack_notifier ack_notifier;
653 struct list_head list;
654 int assigned_dev_id;
655 int host_segnr;
656 int host_busnr;
657 int host_devfn;
658 unsigned int entries_nr;
659 int host_irq;
660 bool host_irq_disabled;
661 bool pci_2_3;
662 struct msix_entry *host_msix_entries;
663 int guest_irq;
664 struct msix_entry *guest_msix_entries;
665 unsigned long irq_requested_type;
666 int irq_source_id;
667 int flags;
668 struct pci_dev *dev;
669 struct kvm *kvm;
670 spinlock_t intx_lock;
671 spinlock_t intx_mask_lock;
672 char irq_name[32];
673 struct pci_saved_state *pci_saved_state;
674};
675
676struct kvm_irq_mask_notifier {
677 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
678 int irq;
679 struct hlist_node link;
680};
681
682void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
683 struct kvm_irq_mask_notifier *kimn);
684void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
685 struct kvm_irq_mask_notifier *kimn);
686void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
687 bool mask);
688
689#ifdef __KVM_HAVE_IOAPIC
690void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
691 union kvm_ioapic_redirect_entry *entry,
692 unsigned long *deliver_bitmask);
693#endif
694int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
695int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
696int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
697 int irq_source_id, int level);
698bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
699void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
700void kvm_register_irq_ack_notifier(struct kvm *kvm,
701 struct kvm_irq_ack_notifier *kian);
702void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
703 struct kvm_irq_ack_notifier *kian);
704int kvm_request_irq_source_id(struct kvm *kvm);
705void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
706
707/* For vcpu->arch.iommu_flags */
708#define KVM_IOMMU_CACHE_COHERENCY 0x1
709
710#ifdef CONFIG_IOMMU_API
711int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
712void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
713int kvm_iommu_map_guest(struct kvm *kvm);
714int kvm_iommu_unmap_guest(struct kvm *kvm);
715int kvm_assign_device(struct kvm *kvm,
716 struct kvm_assigned_dev_kernel *assigned_dev);
717int kvm_deassign_device(struct kvm *kvm,
718 struct kvm_assigned_dev_kernel *assigned_dev);
719#else /* CONFIG_IOMMU_API */
720static inline int kvm_iommu_map_pages(struct kvm *kvm,
721 struct kvm_memory_slot *slot)
722{
723 return 0;
724}
725
726static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
727 struct kvm_memory_slot *slot)
728{
729}
730
731static inline int kvm_iommu_map_guest(struct kvm *kvm)
732{
733 return -ENODEV;
734}
735
736static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
737{
738 return 0;
739}
740
741static inline int kvm_assign_device(struct kvm *kvm,
742 struct kvm_assigned_dev_kernel *assigned_dev)
743{
744 return 0;
745}
746
747static inline int kvm_deassign_device(struct kvm *kvm,
748 struct kvm_assigned_dev_kernel *assigned_dev)
749{
750 return 0;
751}
752#endif /* CONFIG_IOMMU_API */
753
754static inline void __guest_enter(void)
755{
756 /*
757 * This is running in ioctl context so we can avoid
758 * the call to vtime_account() with its unnecessary idle check.
759 */
760 vtime_account_system(current);
761 current->flags |= PF_VCPU;
762}
763
764static inline void __guest_exit(void)
765{
766 /*
767 * This is running in ioctl context so we can avoid
768 * the call to vtime_account() with its unnecessary idle check.
769 */
770 vtime_account_system(current);
771 current->flags &= ~PF_VCPU;
772}
773
774#ifdef CONFIG_CONTEXT_TRACKING
775extern void guest_enter(void);
776extern void guest_exit(void);
777
778#else /* !CONFIG_CONTEXT_TRACKING */
779static inline void guest_enter(void)
780{
781 __guest_enter();
782}
783
784static inline void guest_exit(void)
785{
786 __guest_exit();
787}
788#endif /* !CONFIG_CONTEXT_TRACKING */
789
790static inline void kvm_guest_enter(void)
791{
792 unsigned long flags;
793
794 BUG_ON(preemptible());
795
796 local_irq_save(flags);
797 guest_enter();
798 local_irq_restore(flags);
799
800 /* KVM does not hold any references to rcu protected data when it
801 * switches CPU into a guest mode. In fact switching to a guest mode
802 * is very similar to exiting to userspase from rcu point of view. In
803 * addition CPU may stay in a guest mode for quite a long time (up to
804 * one time slice). Lets treat guest mode as quiescent state, just like
805 * we do with user-mode execution.
806 */
807 rcu_virt_note_context_switch(smp_processor_id());
808}
809
810static inline void kvm_guest_exit(void)
811{
812 unsigned long flags;
813
814 local_irq_save(flags);
815 guest_exit();
816 local_irq_restore(flags);
817}
818
819/*
820 * search_memslots() and __gfn_to_memslot() are here because they are
821 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
822 * gfn_to_memslot() itself isn't here as an inline because that would
823 * bloat other code too much.
824 */
825static inline struct kvm_memory_slot *
826search_memslots(struct kvm_memslots *slots, gfn_t gfn)
827{
828 struct kvm_memory_slot *memslot;
829
830 kvm_for_each_memslot(memslot, slots)
831 if (gfn >= memslot->base_gfn &&
832 gfn < memslot->base_gfn + memslot->npages)
833 return memslot;
834
835 return NULL;
836}
837
838static inline struct kvm_memory_slot *
839__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
840{
841 return search_memslots(slots, gfn);
842}
843
844static inline unsigned long
845__gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
846{
847 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
848}
849
850static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
851{
852 return gfn_to_memslot(kvm, gfn)->id;
853}
854
855static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
856{
857 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
858 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
859 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
860}
861
862static inline gfn_t
863hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
864{
865 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
866
867 return slot->base_gfn + gfn_offset;
868}
869
870static inline gpa_t gfn_to_gpa(gfn_t gfn)
871{
872 return (gpa_t)gfn << PAGE_SHIFT;
873}
874
875static inline gfn_t gpa_to_gfn(gpa_t gpa)
876{
877 return (gfn_t)(gpa >> PAGE_SHIFT);
878}
879
880static inline hpa_t pfn_to_hpa(pfn_t pfn)
881{
882 return (hpa_t)pfn << PAGE_SHIFT;
883}
884
885static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
886{
887 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
888}
889
890enum kvm_stat_kind {
891 KVM_STAT_VM,
892 KVM_STAT_VCPU,
893};
894
895struct kvm_stats_debugfs_item {
896 const char *name;
897 int offset;
898 enum kvm_stat_kind kind;
899 struct dentry *dentry;
900};
901extern struct kvm_stats_debugfs_item debugfs_entries[];
902extern struct dentry *kvm_debugfs_dir;
903
904#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
905static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
906{
907 if (unlikely(kvm->mmu_notifier_count))
908 return 1;
909 /*
910 * Ensure the read of mmu_notifier_count happens before the read
911 * of mmu_notifier_seq. This interacts with the smp_wmb() in
912 * mmu_notifier_invalidate_range_end to make sure that the caller
913 * either sees the old (non-zero) value of mmu_notifier_count or
914 * the new (incremented) value of mmu_notifier_seq.
915 * PowerPC Book3s HV KVM calls this under a per-page lock
916 * rather than under kvm->mmu_lock, for scalability, so
917 * can't rely on kvm->mmu_lock to keep things ordered.
918 */
919 smp_rmb();
920 if (kvm->mmu_notifier_seq != mmu_seq)
921 return 1;
922 return 0;
923}
924#endif
925
926#ifdef KVM_CAP_IRQ_ROUTING
927
928#define KVM_MAX_IRQ_ROUTES 1024
929
930int kvm_setup_default_irq_routing(struct kvm *kvm);
931int kvm_set_irq_routing(struct kvm *kvm,
932 const struct kvm_irq_routing_entry *entries,
933 unsigned nr,
934 unsigned flags);
935void kvm_free_irq_routing(struct kvm *kvm);
936
937int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
938
939#else
940
941static inline void kvm_free_irq_routing(struct kvm *kvm) {}
942
943#endif
944
945#ifdef CONFIG_HAVE_KVM_EVENTFD
946
947void kvm_eventfd_init(struct kvm *kvm);
948int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
949
950#ifdef CONFIG_HAVE_KVM_IRQCHIP
951int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
952void kvm_irqfd_release(struct kvm *kvm);
953void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
954#else
955static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
956{
957 return -EINVAL;
958}
959
960static inline void kvm_irqfd_release(struct kvm *kvm) {}
961#endif
962
963#else
964
965static inline void kvm_eventfd_init(struct kvm *kvm) {}
966
967static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
968{
969 return -EINVAL;
970}
971
972static inline void kvm_irqfd_release(struct kvm *kvm) {}
973
974#ifdef CONFIG_HAVE_KVM_IRQCHIP
975static inline void kvm_irq_routing_update(struct kvm *kvm,
976 struct kvm_irq_routing_table *irq_rt)
977{
978 rcu_assign_pointer(kvm->irq_routing, irq_rt);
979}
980#endif
981
982static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
983{
984 return -ENOSYS;
985}
986
987#endif /* CONFIG_HAVE_KVM_EVENTFD */
988
989#ifdef CONFIG_KVM_APIC_ARCHITECTURE
990static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
991{
992 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
993}
994
995bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
996
997#else
998
999static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1000
1001#endif
1002
1003#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
1004
1005long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1006 unsigned long arg);
1007
1008#else
1009
1010static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1011 unsigned long arg)
1012{
1013 return -ENOTTY;
1014}
1015
1016#endif
1017
1018static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1019{
1020 set_bit(req, &vcpu->requests);
1021}
1022
1023static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1024{
1025 if (test_bit(req, &vcpu->requests)) {
1026 clear_bit(req, &vcpu->requests);
1027 return true;
1028 } else {
1029 return false;
1030 }
1031}
1032
1033#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1034
1035static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1036{
1037 vcpu->spin_loop.in_spin_loop = val;
1038}
1039static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1040{
1041 vcpu->spin_loop.dy_eligible = val;
1042}
1043
1044#else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1045
1046static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1047{
1048}
1049
1050static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1051{
1052}
1053
1054static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1055{
1056 return true;
1057}
1058
1059#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1060#else
1061static inline void __guest_enter(void) { return; }
1062static inline void __guest_exit(void) { return; }
1063#endif /* IS_ENABLED(CONFIG_KVM) */
1064#endif
Linux kernel - Deliverables
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