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 41 struct kvm_vcpu; 42 extern struct kmem_cache *kvm_vcpu_cache; 43 44 struct 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 */ 56 struct kvm_io_bus { 57 int dev_count; 58 #define NR_IOBUS_DEVS 6 59 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 60 }; 61 62 void kvm_io_bus_init(struct kvm_io_bus *bus); 63 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 64 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr); 65 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 66 struct kvm_io_device *dev); 67 68 struct 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 97 struct 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 }; 106 107 struct 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) 134 135 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 136 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 137 138 void vcpu_load(struct kvm_vcpu *vcpu); 139 void vcpu_put(struct kvm_vcpu *vcpu); 140 141 void decache_vcpus_on_cpu(int cpu); 142 143 144 int kvm_init(void *opaque, unsigned int vcpu_size, 145 struct module *module); 146 void kvm_exit(void); 147 148 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 149 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 150 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 151 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 152 153 extern struct page *bad_page; 154 155 int is_error_page(struct page *page); 156 int kvm_is_error_hva(unsigned long addr); 157 int kvm_set_memory_region(struct kvm *kvm, 158 struct kvm_userspace_memory_region *mem, 159 int user_alloc); 160 int __kvm_set_memory_region(struct kvm *kvm, 161 struct kvm_userspace_memory_region *mem, 162 int user_alloc); 163 int 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); 167 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 168 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 169 void kvm_release_page_clean(struct page *page); 170 void kvm_release_page_dirty(struct page *page); 171 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 172 int len); 173 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 174 unsigned long len); 175 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 176 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 177 int offset, int len); 178 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 179 unsigned long len); 180 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 181 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 182 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 183 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 184 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 185 186 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 187 void kvm_resched(struct kvm_vcpu *vcpu); 188 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 189 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 190 void kvm_flush_remote_tlbs(struct kvm *kvm); 191 192 long kvm_arch_dev_ioctl(struct file *filp, 193 unsigned int ioctl, unsigned long arg); 194 long kvm_arch_vcpu_ioctl(struct file *filp, 195 unsigned int ioctl, unsigned long arg); 196 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 197 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 198 199 int kvm_dev_ioctl_check_extension(long ext); 200 201 int kvm_get_dirty_log(struct kvm *kvm, 202 struct kvm_dirty_log *log, int *is_dirty); 203 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 204 struct kvm_dirty_log *log); 205 206 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 207 struct 208 kvm_userspace_memory_region *mem, 209 int user_alloc); 210 long kvm_arch_vm_ioctl(struct file *filp, 211 unsigned int ioctl, unsigned long arg); 212 void kvm_arch_destroy_vm(struct kvm *kvm); 213 214 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 215 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 216 217 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 218 struct kvm_translation *tr); 219 220 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 221 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 222 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 223 struct kvm_sregs *sregs); 224 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 225 struct kvm_sregs *sregs); 226 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, 227 struct kvm_debug_guest *dbg); 228 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 229 230 int kvm_arch_init(void *opaque); 231 void kvm_arch_exit(void); 232 233 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 234 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 235 236 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 237 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 238 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 239 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 240 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 241 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 242 243 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 244 void kvm_arch_hardware_enable(void *garbage); 245 void kvm_arch_hardware_disable(void *garbage); 246 int kvm_arch_hardware_setup(void); 247 void kvm_arch_hardware_unsetup(void); 248 void kvm_arch_check_processor_compat(void *rtn); 249 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 250 251 void kvm_free_physmem(struct kvm *kvm); 252 253 struct kvm *kvm_arch_create_vm(void); 254 void kvm_arch_destroy_vm(struct kvm *kvm); 255 256 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 257 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 258 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 259 260 static inline void kvm_guest_enter(void) 261 { 262 account_system_vtime(current); 263 current->flags |= PF_VCPU; 264 } 265 266 static inline void kvm_guest_exit(void) 267 { 268 account_system_vtime(current); 269 current->flags &= ~PF_VCPU; 270 } 271 272 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 273 { 274 return slot - kvm->memslots; 275 } 276 277 static inline gpa_t gfn_to_gpa(gfn_t gfn) 278 { 279 return (gpa_t)gfn << PAGE_SHIFT; 280 } 281 282 static inline void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) 283 { 284 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 285 } 286 287 enum kvm_stat_kind { 288 KVM_STAT_VM, 289 KVM_STAT_VCPU, 290 }; 291 292 struct kvm_stats_debugfs_item { 293 const char *name; 294 int offset; 295 enum kvm_stat_kind kind; 296 struct dentry *dentry; 297 }; 298 extern struct kvm_stats_debugfs_item debugfs_entries[]; 299 300 #endif 301