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 38 struct kvm_vcpu; 39 extern 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 */ 47 struct kvm_io_bus { 48 int dev_count; 49 #define NR_IOBUS_DEVS 6 50 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 51 }; 52 53 void kvm_io_bus_init(struct kvm_io_bus *bus); 54 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 55 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, 56 gpa_t addr, int len, int is_write); 57 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 58 struct kvm_io_device *dev); 59 60 struct kvm_vcpu { 61 struct kvm *kvm; 62 #ifdef CONFIG_PREEMPT_NOTIFIERS 63 struct preempt_notifier preempt_notifier; 64 #endif 65 int vcpu_id; 66 struct mutex mutex; 67 int cpu; 68 struct kvm_run *run; 69 int guest_mode; 70 unsigned long requests; 71 struct kvm_guest_debug guest_debug; 72 int fpu_active; 73 int guest_fpu_loaded; 74 wait_queue_head_t wq; 75 int sigset_active; 76 sigset_t sigset; 77 struct kvm_vcpu_stat stat; 78 79 #ifdef CONFIG_HAS_IOMEM 80 int mmio_needed; 81 int mmio_read_completed; 82 int mmio_is_write; 83 int mmio_size; 84 unsigned char mmio_data[8]; 85 gpa_t mmio_phys_addr; 86 #endif 87 88 struct kvm_vcpu_arch arch; 89 }; 90 91 struct kvm_memory_slot { 92 gfn_t base_gfn; 93 unsigned long npages; 94 unsigned long flags; 95 unsigned long *rmap; 96 unsigned long *dirty_bitmap; 97 struct { 98 unsigned long rmap_pde; 99 int write_count; 100 } *lpage_info; 101 unsigned long userspace_addr; 102 int user_alloc; 103 }; 104 105 struct kvm { 106 struct mutex lock; /* protects the vcpus array and APIC accesses */ 107 spinlock_t mmu_lock; 108 struct rw_semaphore slots_lock; 109 struct mm_struct *mm; /* userspace tied to this vm */ 110 int nmemslots; 111 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 112 KVM_PRIVATE_MEM_SLOTS]; 113 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 114 struct list_head vm_list; 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 atomic_t users_count; 120 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 121 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 122 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 123 #endif 124 125 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 126 struct mmu_notifier mmu_notifier; 127 unsigned long mmu_notifier_seq; 128 long mmu_notifier_count; 129 #endif 130 }; 131 132 /* The guest did something we don't support. */ 133 #define pr_unimpl(vcpu, fmt, ...) \ 134 do { \ 135 if (printk_ratelimit()) \ 136 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 137 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 138 } while (0) 139 140 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 141 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 142 143 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 144 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 145 146 void vcpu_load(struct kvm_vcpu *vcpu); 147 void vcpu_put(struct kvm_vcpu *vcpu); 148 149 int kvm_init(void *opaque, unsigned int vcpu_size, 150 struct module *module); 151 void kvm_exit(void); 152 153 void kvm_get_kvm(struct kvm *kvm); 154 void kvm_put_kvm(struct kvm *kvm); 155 156 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 157 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 158 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 159 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 160 161 extern struct page *bad_page; 162 extern pfn_t bad_pfn; 163 164 int is_error_page(struct page *page); 165 int is_error_pfn(pfn_t pfn); 166 int kvm_is_error_hva(unsigned long addr); 167 int kvm_set_memory_region(struct kvm *kvm, 168 struct kvm_userspace_memory_region *mem, 169 int user_alloc); 170 int __kvm_set_memory_region(struct kvm *kvm, 171 struct kvm_userspace_memory_region *mem, 172 int user_alloc); 173 int kvm_arch_set_memory_region(struct kvm *kvm, 174 struct kvm_userspace_memory_region *mem, 175 struct kvm_memory_slot old, 176 int user_alloc); 177 void kvm_arch_flush_shadow(struct kvm *kvm); 178 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 179 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 180 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 181 void kvm_release_page_clean(struct page *page); 182 void kvm_release_page_dirty(struct page *page); 183 void kvm_set_page_dirty(struct page *page); 184 void kvm_set_page_accessed(struct page *page); 185 186 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 187 void kvm_release_pfn_dirty(pfn_t); 188 void kvm_release_pfn_clean(pfn_t pfn); 189 void kvm_set_pfn_dirty(pfn_t pfn); 190 void kvm_set_pfn_accessed(pfn_t pfn); 191 void kvm_get_pfn(pfn_t pfn); 192 193 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 194 int len); 195 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 196 unsigned long len); 197 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 198 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 199 int offset, int len); 200 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 201 unsigned long len); 202 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 203 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 204 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 205 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 206 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 207 208 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 209 void kvm_resched(struct kvm_vcpu *vcpu); 210 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 211 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 212 void kvm_flush_remote_tlbs(struct kvm *kvm); 213 void kvm_reload_remote_mmus(struct kvm *kvm); 214 215 long kvm_arch_dev_ioctl(struct file *filp, 216 unsigned int ioctl, unsigned long arg); 217 long kvm_arch_vcpu_ioctl(struct file *filp, 218 unsigned int ioctl, unsigned long arg); 219 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 220 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 221 222 int kvm_dev_ioctl_check_extension(long ext); 223 224 int kvm_get_dirty_log(struct kvm *kvm, 225 struct kvm_dirty_log *log, int *is_dirty); 226 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 227 struct kvm_dirty_log *log); 228 229 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 230 struct 231 kvm_userspace_memory_region *mem, 232 int user_alloc); 233 long kvm_arch_vm_ioctl(struct file *filp, 234 unsigned int ioctl, unsigned long arg); 235 void kvm_arch_destroy_vm(struct kvm *kvm); 236 237 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 238 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 239 240 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 241 struct kvm_translation *tr); 242 243 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 244 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 245 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 246 struct kvm_sregs *sregs); 247 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 248 struct kvm_sregs *sregs); 249 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 250 struct kvm_mp_state *mp_state); 251 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 252 struct kvm_mp_state *mp_state); 253 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, 254 struct kvm_debug_guest *dbg); 255 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 256 257 int kvm_arch_init(void *opaque); 258 void kvm_arch_exit(void); 259 260 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 261 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 262 263 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 264 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 265 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 266 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 267 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 268 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 269 270 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 271 void kvm_arch_hardware_enable(void *garbage); 272 void kvm_arch_hardware_disable(void *garbage); 273 int kvm_arch_hardware_setup(void); 274 void kvm_arch_hardware_unsetup(void); 275 void kvm_arch_check_processor_compat(void *rtn); 276 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 277 278 void kvm_free_physmem(struct kvm *kvm); 279 280 struct kvm *kvm_arch_create_vm(void); 281 void kvm_arch_destroy_vm(struct kvm *kvm); 282 283 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 284 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 285 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 286 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 287 288 static inline void kvm_guest_enter(void) 289 { 290 account_system_vtime(current); 291 current->flags |= PF_VCPU; 292 } 293 294 static inline void kvm_guest_exit(void) 295 { 296 account_system_vtime(current); 297 current->flags &= ~PF_VCPU; 298 } 299 300 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 301 { 302 return slot - kvm->memslots; 303 } 304 305 static inline gpa_t gfn_to_gpa(gfn_t gfn) 306 { 307 return (gpa_t)gfn << PAGE_SHIFT; 308 } 309 310 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 311 { 312 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 313 } 314 315 enum kvm_stat_kind { 316 KVM_STAT_VM, 317 KVM_STAT_VCPU, 318 }; 319 320 struct kvm_stats_debugfs_item { 321 const char *name; 322 int offset; 323 enum kvm_stat_kind kind; 324 struct dentry *dentry; 325 }; 326 extern struct kvm_stats_debugfs_item debugfs_entries[]; 327 extern struct dentry *kvm_debugfs_dir; 328 329 #ifdef CONFIG_KVM_TRACE 330 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); 331 void kvm_trace_cleanup(void); 332 #else 333 static inline 334 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) 335 { 336 return -EINVAL; 337 } 338 #define kvm_trace_cleanup() ((void)0) 339 #endif 340 341 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 342 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 343 { 344 if (unlikely(vcpu->kvm->mmu_notifier_count)) 345 return 1; 346 /* 347 * Both reads happen under the mmu_lock and both values are 348 * modified under mmu_lock, so there's no need of smb_rmb() 349 * here in between, otherwise mmu_notifier_count should be 350 * read before mmu_notifier_seq, see 351 * mmu_notifier_invalidate_range_end write side. 352 */ 353 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 354 return 1; 355 return 0; 356 } 357 #endif 358 359 #endif 360