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-rw-r--r--include/linux/kvm_host.h289
1 files changed, 289 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
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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/mm.h>
17#include <linux/preempt.h>
18#include <asm/signal.h>
19
20#include <linux/kvm.h>
21#include <linux/kvm_para.h>
22
23#include <linux/kvm_types.h>
24
25#include <asm/kvm_host.h>
26
27#define KVM_MAX_VCPUS 4
28#define KVM_MEMORY_SLOTS 8
29/* memory slots that does not exposed to userspace */
30#define KVM_PRIVATE_MEM_SLOTS 4
31
32#define KVM_PIO_PAGE_OFFSET 1
33
34/*
35 * vcpu->requests bit members
36 */
37#define KVM_REQ_TLB_FLUSH 0
38
39
40struct kvm_vcpu;
41extern struct kmem_cache *kvm_vcpu_cache;
42
43struct kvm_guest_debug {
44 int enabled;
45 unsigned long bp[4];
46 int singlestep;
47};
48
49/*
50 * It would be nice to use something smarter than a linear search, TBD...
51 * Thankfully we dont expect many devices to register (famous last words :),
52 * so until then it will suffice. At least its abstracted so we can change
53 * in one place.
54 */
55struct kvm_io_bus {
56 int dev_count;
57#define NR_IOBUS_DEVS 6
58 struct kvm_io_device *devs[NR_IOBUS_DEVS];
59};
60
61void kvm_io_bus_init(struct kvm_io_bus *bus);
62void kvm_io_bus_destroy(struct kvm_io_bus *bus);
63struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
64void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
65 struct kvm_io_device *dev);
66
67struct kvm_vcpu {
68 struct kvm *kvm;
69 struct preempt_notifier preempt_notifier;
70 int vcpu_id;
71 struct mutex mutex;
72 int cpu;
73 struct kvm_run *run;
74 int guest_mode;
75 unsigned long requests;
76 struct kvm_guest_debug guest_debug;
77 int fpu_active;
78 int guest_fpu_loaded;
79 wait_queue_head_t wq;
80 int sigset_active;
81 sigset_t sigset;
82 struct kvm_vcpu_stat stat;
83
84#ifdef CONFIG_HAS_IOMEM
85 int mmio_needed;
86 int mmio_read_completed;
87 int mmio_is_write;
88 int mmio_size;
89 unsigned char mmio_data[8];
90 gpa_t mmio_phys_addr;
91#endif
92
93 struct kvm_vcpu_arch arch;
94};
95
96struct kvm_memory_slot {
97 gfn_t base_gfn;
98 unsigned long npages;
99 unsigned long flags;
100 unsigned long *rmap;
101 unsigned long *dirty_bitmap;
102 unsigned long userspace_addr;
103 int user_alloc;
104};
105
106struct kvm {
107 struct mutex lock; /* protects everything except vcpus */
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 file *filp;
115 struct kvm_io_bus mmio_bus;
116 struct kvm_io_bus pio_bus;
117 struct kvm_vm_stat stat;
118 struct kvm_arch arch;
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
145#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
146#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
147static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
148struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
149
150extern struct page *bad_page;
151
152int is_error_page(struct page *page);
153int kvm_is_error_hva(unsigned long addr);
154int kvm_set_memory_region(struct kvm *kvm,
155 struct kvm_userspace_memory_region *mem,
156 int user_alloc);
157int __kvm_set_memory_region(struct kvm *kvm,
158 struct kvm_userspace_memory_region *mem,
159 int user_alloc);
160int kvm_arch_set_memory_region(struct kvm *kvm,
161 struct kvm_userspace_memory_region *mem,
162 struct kvm_memory_slot old,
163 int user_alloc);
164gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
165struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
166void kvm_release_page_clean(struct page *page);
167void kvm_release_page_dirty(struct page *page);
168int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
169 int len);
170int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
171int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
172 int offset, int len);
173int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
174 unsigned long len);
175int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
176int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
177struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
178int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
179void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
180
181void kvm_vcpu_block(struct kvm_vcpu *vcpu);
182void kvm_resched(struct kvm_vcpu *vcpu);
183void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
184void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
185void kvm_flush_remote_tlbs(struct kvm *kvm);
186
187long kvm_arch_dev_ioctl(struct file *filp,
188 unsigned int ioctl, unsigned long arg);
189long kvm_arch_vcpu_ioctl(struct file *filp,
190 unsigned int ioctl, unsigned long arg);
191void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
192void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
193
194int kvm_dev_ioctl_check_extension(long ext);
195
196int kvm_get_dirty_log(struct kvm *kvm,
197 struct kvm_dirty_log *log, int *is_dirty);
198int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
199 struct kvm_dirty_log *log);
200
201int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
202 struct
203 kvm_userspace_memory_region *mem,
204 int user_alloc);
205long kvm_arch_vm_ioctl(struct file *filp,
206 unsigned int ioctl, unsigned long arg);
207void kvm_arch_destroy_vm(struct kvm *kvm);
208
209int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
210int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
211
212int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
213 struct kvm_translation *tr);
214
215int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
216int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
217int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
218 struct kvm_sregs *sregs);
219int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
220 struct kvm_sregs *sregs);
221int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
222 struct kvm_debug_guest *dbg);
223int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
224
225int kvm_arch_init(void *opaque);
226void kvm_arch_exit(void);
227
228int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
229void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
230
231void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
232void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
233void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
234struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
235int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
236void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
237
238int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
239void kvm_arch_hardware_enable(void *garbage);
240void kvm_arch_hardware_disable(void *garbage);
241int kvm_arch_hardware_setup(void);
242void kvm_arch_hardware_unsetup(void);
243void kvm_arch_check_processor_compat(void *rtn);
244int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
245
246void kvm_free_physmem(struct kvm *kvm);
247
248struct kvm *kvm_arch_create_vm(void);
249void kvm_arch_destroy_vm(struct kvm *kvm);
250
251int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
252int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
253
254static inline void kvm_guest_enter(void)
255{
256 account_system_vtime(current);
257 current->flags |= PF_VCPU;
258}
259
260static inline void kvm_guest_exit(void)
261{
262 account_system_vtime(current);
263 current->flags &= ~PF_VCPU;
264}
265
266static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
267{
268 return slot - kvm->memslots;
269}
270
271static inline gpa_t gfn_to_gpa(gfn_t gfn)
272{
273 return (gpa_t)gfn << PAGE_SHIFT;
274}
275
276enum kvm_stat_kind {
277 KVM_STAT_VM,
278 KVM_STAT_VCPU,
279};
280
281struct kvm_stats_debugfs_item {
282 const char *name;
283 int offset;
284 enum kvm_stat_kind kind;
285 struct dentry *dentry;
286};
287extern struct kvm_stats_debugfs_item debugfs_entries[];
288
289#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 06:05:02 -0500