Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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/mm.h>
17#include <linux/preempt.h>
18#include <linux/marker.h>
19#include <asm/signal.h>
20
21#include <linux/kvm.h>
22#include <linux/kvm_para.h>
23
24#include <linux/kvm_types.h>
25
26#include <asm/kvm_host.h>
27
28/*
29 * vcpu->requests bit members
30 */
31#define KVM_REQ_TLB_FLUSH 0
32#define KVM_REQ_MIGRATE_TIMER 1
33#define KVM_REQ_REPORT_TPR_ACCESS 2
34#define KVM_REQ_MMU_RELOAD 3
35#define KVM_REQ_TRIPLE_FAULT 4
36#define KVM_REQ_PENDING_TIMER 5
37
38struct kvm_vcpu;
39extern struct kmem_cache *kvm_vcpu_cache;
40
41/*
42 * It would be nice to use something smarter than a linear search, TBD...
43 * Thankfully we dont expect many devices to register (famous last words :),
44 * so until then it will suffice. At least its abstracted so we can change
45 * in one place.
46 */
47struct kvm_io_bus {
48 int dev_count;
49#define NR_IOBUS_DEVS 6
50 struct kvm_io_device *devs[NR_IOBUS_DEVS];
51};
52
53void kvm_io_bus_init(struct kvm_io_bus *bus);
54void kvm_io_bus_destroy(struct kvm_io_bus *bus);
55struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
56void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
57 struct kvm_io_device *dev);
58
59struct kvm_vcpu {
60 struct kvm *kvm;
61#ifdef CONFIG_PREEMPT_NOTIFIERS
62 struct preempt_notifier preempt_notifier;
63#endif
64 int vcpu_id;
65 struct mutex mutex;
66 int cpu;
67 struct kvm_run *run;
68 int guest_mode;
69 unsigned long requests;
70 struct kvm_guest_debug guest_debug;
71 int fpu_active;
72 int guest_fpu_loaded;
73 wait_queue_head_t wq;
74 int sigset_active;
75 sigset_t sigset;
76 struct kvm_vcpu_stat stat;
77
78#ifdef CONFIG_HAS_IOMEM
79 int mmio_needed;
80 int mmio_read_completed;
81 int mmio_is_write;
82 int mmio_size;
83 unsigned char mmio_data[8];
84 gpa_t mmio_phys_addr;
85#endif
86
87 struct kvm_vcpu_arch arch;
88};
89
90struct kvm_memory_slot {
91 gfn_t base_gfn;
92 unsigned long npages;
93 unsigned long flags;
94 unsigned long *rmap;
95 unsigned long *dirty_bitmap;
96 struct {
97 unsigned long rmap_pde;
98 int write_count;
99 } *lpage_info;
100 unsigned long userspace_addr;
101 int user_alloc;
102};
103
104struct kvm {
105 struct mutex lock; /* protects the vcpus array and APIC accesses */
106 spinlock_t mmu_lock;
107 struct rw_semaphore slots_lock;
108 struct mm_struct *mm; /* userspace tied to this vm */
109 int nmemslots;
110 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
111 KVM_PRIVATE_MEM_SLOTS];
112 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
113 struct list_head vm_list;
114 struct kvm_io_bus mmio_bus;
115 struct kvm_io_bus pio_bus;
116 struct kvm_vm_stat stat;
117 struct kvm_arch arch;
118 atomic_t users_count;
119};
120
121/* The guest did something we don't support. */
122#define pr_unimpl(vcpu, fmt, ...) \
123 do { \
124 if (printk_ratelimit()) \
125 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
126 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
127 } while (0)
128
129#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
130#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
131
132int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
133void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
134
135void vcpu_load(struct kvm_vcpu *vcpu);
136void vcpu_put(struct kvm_vcpu *vcpu);
137
138void decache_vcpus_on_cpu(int cpu);
139
140
141int kvm_init(void *opaque, unsigned int vcpu_size,
142 struct module *module);
143void kvm_exit(void);
144
145void kvm_get_kvm(struct kvm *kvm);
146void kvm_put_kvm(struct kvm *kvm);
147
148#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
149#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
150static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
151struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
152
153extern struct page *bad_page;
154extern pfn_t bad_pfn;
155
156int is_error_page(struct page *page);
157int is_error_pfn(pfn_t pfn);
158int kvm_is_error_hva(unsigned long addr);
159int kvm_set_memory_region(struct kvm *kvm,
160 struct kvm_userspace_memory_region *mem,
161 int user_alloc);
162int __kvm_set_memory_region(struct kvm *kvm,
163 struct kvm_userspace_memory_region *mem,
164 int user_alloc);
165int kvm_arch_set_memory_region(struct kvm *kvm,
166 struct kvm_userspace_memory_region *mem,
167 struct kvm_memory_slot old,
168 int user_alloc);
169gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
170struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
171unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
172void kvm_release_page_clean(struct page *page);
173void kvm_release_page_dirty(struct page *page);
174void kvm_set_page_dirty(struct page *page);
175void kvm_set_page_accessed(struct page *page);
176
177pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
178void kvm_release_pfn_dirty(pfn_t);
179void kvm_release_pfn_clean(pfn_t pfn);
180void kvm_set_pfn_dirty(pfn_t pfn);
181void kvm_set_pfn_accessed(pfn_t pfn);
182void kvm_get_pfn(pfn_t pfn);
183
184int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
185 int len);
186int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
187 unsigned long len);
188int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
189int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
190 int offset, int len);
191int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
192 unsigned long len);
193int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
194int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
195struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
196int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
197void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
198
199void kvm_vcpu_block(struct kvm_vcpu *vcpu);
200void kvm_resched(struct kvm_vcpu *vcpu);
201void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
202void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
203void kvm_flush_remote_tlbs(struct kvm *kvm);
204void kvm_reload_remote_mmus(struct kvm *kvm);
205
206long kvm_arch_dev_ioctl(struct file *filp,
207 unsigned int ioctl, unsigned long arg);
208long kvm_arch_vcpu_ioctl(struct file *filp,
209 unsigned int ioctl, unsigned long arg);
210void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
211void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
212
213int kvm_dev_ioctl_check_extension(long ext);
214
215int kvm_get_dirty_log(struct kvm *kvm,
216 struct kvm_dirty_log *log, int *is_dirty);
217int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
218 struct kvm_dirty_log *log);
219
220int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
221 struct
222 kvm_userspace_memory_region *mem,
223 int user_alloc);
224long kvm_arch_vm_ioctl(struct file *filp,
225 unsigned int ioctl, unsigned long arg);
226void kvm_arch_destroy_vm(struct kvm *kvm);
227
228int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
229int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
230
231int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
232 struct kvm_translation *tr);
233
234int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
235int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
236int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
237 struct kvm_sregs *sregs);
238int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
239 struct kvm_sregs *sregs);
240int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
241 struct kvm_mp_state *mp_state);
242int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
243 struct kvm_mp_state *mp_state);
244int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
245 struct kvm_debug_guest *dbg);
246int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
247
248int kvm_arch_init(void *opaque);
249void kvm_arch_exit(void);
250
251int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
252void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
253
254void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
255void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
256void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
257struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
258int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
259void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
260
261int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
262void kvm_arch_hardware_enable(void *garbage);
263void kvm_arch_hardware_disable(void *garbage);
264int kvm_arch_hardware_setup(void);
265void kvm_arch_hardware_unsetup(void);
266void kvm_arch_check_processor_compat(void *rtn);
267int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
268
269void kvm_free_physmem(struct kvm *kvm);
270
271struct kvm *kvm_arch_create_vm(void);
272void kvm_arch_destroy_vm(struct kvm *kvm);
273
274int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
275int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
276int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
277void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
278
279static inline void kvm_guest_enter(void)
280{
281 account_system_vtime(current);
282 current->flags |= PF_VCPU;
283}
284
285static inline void kvm_guest_exit(void)
286{
287 account_system_vtime(current);
288 current->flags &= ~PF_VCPU;
289}
290
291static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
292{
293 return slot - kvm->memslots;
294}
295
296static inline gpa_t gfn_to_gpa(gfn_t gfn)
297{
298 return (gpa_t)gfn << PAGE_SHIFT;
299}
300
301static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
302{
303 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
304}
305
306enum kvm_stat_kind {
307 KVM_STAT_VM,
308 KVM_STAT_VCPU,
309};
310
311struct kvm_stats_debugfs_item {
312 const char *name;
313 int offset;
314 enum kvm_stat_kind kind;
315 struct dentry *dentry;
316};
317extern struct kvm_stats_debugfs_item debugfs_entries[];
318extern struct dentry *kvm_debugfs_dir;
319
320#ifdef CONFIG_KVM_TRACE
321int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
322void kvm_trace_cleanup(void);
323#else
324static inline
325int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
326{
327 return -EINVAL;
328}
329#define kvm_trace_cleanup() ((void)0)
330#endif
331
332#endif