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