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