include/linux/kvm_host.h

   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 <linux/msi.h>
  20 #include <asm/signal.h>
  21
  22 #include <linux/kvm.h>
  23 #include <linux/kvm_para.h>
  24
  25 #include <linux/kvm_types.h>
  26
  27 #include <asm/kvm_host.h>
  28
  29 /*
  30  * vcpu->requests bit members
  31  */
  32 #define KVM_REQ_TLB_FLUSH          0
  33 #define KVM_REQ_MIGRATE_TIMER      1
  34 #define KVM_REQ_REPORT_TPR_ACCESS  2
  35 #define KVM_REQ_MMU_RELOAD         3
  36 #define KVM_REQ_TRIPLE_FAULT       4
  37 #define KVM_REQ_PENDING_TIMER      5
  38 #define KVM_REQ_UNHALT             6
  39 #define KVM_REQ_MMU_SYNC           7
  40 #define KVM_REQ_KVMCLOCK_UPDATE    8
  41 #define KVM_REQ_KICK               9
  42
  43 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  44
  45 struct kvm_vcpu;
  46 extern struct kmem_cache *kvm_vcpu_cache;
  47
  48 /*
  49  * It would be nice to use something smarter than a linear search, TBD...
  50  * Thankfully we dont expect many devices to register (famous last words :),
  51  * so until then it will suffice.  At least its abstracted so we can change
  52  * in one place.
  53  */
  54 struct kvm_io_bus {
  55         int                   dev_count;
  56 #define NR_IOBUS_DEVS 6
  57         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  58 };
  59
  60 void kvm_io_bus_init(struct kvm_io_bus *bus);
  61 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
  62 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
  63                                           gpa_t addr, int len, int is_write);
  64 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  65                              struct kvm_io_device *dev);
  66
  67 struct kvm_vcpu {
  68         struct kvm *kvm;
  69 #ifdef CONFIG_PREEMPT_NOTIFIERS
  70         struct preempt_notifier preempt_notifier;
  71 #endif
  72         int vcpu_id;
  73         struct mutex mutex;
  74         int   cpu;
  75         struct kvm_run *run;
  76         unsigned long requests;
  77         unsigned long 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         struct {
 104                 unsigned long rmap_pde;
 105                 int write_count;
 106         } *lpage_info;
 107         unsigned long userspace_addr;
 108         int user_alloc;
 109 };
 110
 111 struct kvm_kernel_irq_routing_entry {
 112         u32 gsi;
 113         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 114                     struct kvm *kvm, int level);
 115         union {
 116                 struct {
 117                         unsigned irqchip;
 118                         unsigned pin;
 119                 } irqchip;
 120                 struct msi_msg msi;
 121         };
 122         struct list_head link;
 123 };
 124
 125 struct kvm {
 126         struct mutex lock; /* protects the vcpus array and APIC accesses */
 127         spinlock_t mmu_lock;
 128         spinlock_t requests_lock;
 129         struct rw_semaphore slots_lock;
 130         struct mm_struct *mm; /* userspace tied to this vm */
 131         int nmemslots;
 132         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 133                                         KVM_PRIVATE_MEM_SLOTS];
 134         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 135         struct list_head vm_list;
 136         struct kvm_io_bus mmio_bus;
 137         struct kvm_io_bus pio_bus;
 138         struct kvm_vm_stat stat;
 139         struct kvm_arch arch;
 140         atomic_t users_count;
 141 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 142         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 143         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 144 #endif
 145
 146 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 147         struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
 148         struct hlist_head mask_notifier_list;
 149 #endif
 150
 151 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 152         struct mmu_notifier mmu_notifier;
 153         unsigned long mmu_notifier_seq;
 154         long mmu_notifier_count;
 155 #endif
 156 };
 157
 158 /* The guest did something we don't support. */
 159 #define pr_unimpl(vcpu, fmt, ...)                                       \
 160  do {                                                                   \
 161         if (printk_ratelimit())                                         \
 162                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 163                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 164  } while (0)
 165
 166 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 167 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 168
 169 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 170 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 171
 172 void vcpu_load(struct kvm_vcpu *vcpu);
 173 void vcpu_put(struct kvm_vcpu *vcpu);
 174
 175 int kvm_init(void *opaque, unsigned int vcpu_size,
 176                   struct module *module);
 177 void kvm_exit(void);
 178
 179 void kvm_get_kvm(struct kvm *kvm);
 180 void kvm_put_kvm(struct kvm *kvm);
 181
 182 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 183 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 184 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 185 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 186
 187 extern struct page *bad_page;
 188 extern pfn_t bad_pfn;
 189
 190 int is_error_page(struct page *page);
 191 int is_error_pfn(pfn_t pfn);
 192 int kvm_is_error_hva(unsigned long addr);
 193 int kvm_set_memory_region(struct kvm *kvm,
 194                           struct kvm_userspace_memory_region *mem,
 195                           int user_alloc);
 196 int __kvm_set_memory_region(struct kvm *kvm,
 197                             struct kvm_userspace_memory_region *mem,
 198                             int user_alloc);
 199 int kvm_arch_set_memory_region(struct kvm *kvm,
 200                                 struct kvm_userspace_memory_region *mem,
 201                                 struct kvm_memory_slot old,
 202                                 int user_alloc);
 203 void kvm_arch_flush_shadow(struct kvm *kvm);
 204 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 205 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 206 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 207 void kvm_release_page_clean(struct page *page);
 208 void kvm_release_page_dirty(struct page *page);
 209 void kvm_set_page_dirty(struct page *page);
 210 void kvm_set_page_accessed(struct page *page);
 211
 212 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 213 void kvm_release_pfn_dirty(pfn_t);
 214 void kvm_release_pfn_clean(pfn_t pfn);
 215 void kvm_set_pfn_dirty(pfn_t pfn);
 216 void kvm_set_pfn_accessed(pfn_t pfn);
 217 void kvm_get_pfn(pfn_t pfn);
 218
 219 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 220                         int len);
 221 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 222                           unsigned long len);
 223 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 224 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 225                          int offset, int len);
 226 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 227                     unsigned long len);
 228 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 229 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 230 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 231 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 232 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 233
 234 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 235 void kvm_resched(struct kvm_vcpu *vcpu);
 236 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 237 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 238 void kvm_flush_remote_tlbs(struct kvm *kvm);
 239 void kvm_reload_remote_mmus(struct kvm *kvm);
 240
 241 long kvm_arch_dev_ioctl(struct file *filp,
 242                         unsigned int ioctl, unsigned long arg);
 243 long kvm_arch_vcpu_ioctl(struct file *filp,
 244                          unsigned int ioctl, unsigned long arg);
 245 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 246 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 247
 248 int kvm_dev_ioctl_check_extension(long ext);
 249
 250 int kvm_get_dirty_log(struct kvm *kvm,
 251                         struct kvm_dirty_log *log, int *is_dirty);
 252 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 253                                 struct kvm_dirty_log *log);
 254
 255 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 256                                    struct
 257                                    kvm_userspace_memory_region *mem,
 258                                    int user_alloc);
 259 long kvm_arch_vm_ioctl(struct file *filp,
 260                        unsigned int ioctl, unsigned long arg);
 261
 262 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 263 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 264
 265 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 266                                     struct kvm_translation *tr);
 267
 268 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 269 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 270 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 271                                   struct kvm_sregs *sregs);
 272 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 273                                   struct kvm_sregs *sregs);
 274 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 275                                     struct kvm_mp_state *mp_state);
 276 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 277                                     struct kvm_mp_state *mp_state);
 278 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 279                                         struct kvm_guest_debug *dbg);
 280 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 281
 282 int kvm_arch_init(void *opaque);
 283 void kvm_arch_exit(void);
 284
 285 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 286 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 287
 288 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 289 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 290 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 291 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 292 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 293 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 294
 295 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 296 void kvm_arch_hardware_enable(void *garbage);
 297 void kvm_arch_hardware_disable(void *garbage);
 298 int kvm_arch_hardware_setup(void);
 299 void kvm_arch_hardware_unsetup(void);
 300 void kvm_arch_check_processor_compat(void *rtn);
 301 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 302 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 303
 304 void kvm_free_physmem(struct kvm *kvm);
 305
 306 struct  kvm *kvm_arch_create_vm(void);
 307 void kvm_arch_destroy_vm(struct kvm *kvm);
 308 void kvm_free_all_assigned_devices(struct kvm *kvm);
 309 void kvm_arch_sync_events(struct kvm *kvm);
 310
 311 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 312 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 313 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 314 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 315
 316 int kvm_is_mmio_pfn(pfn_t pfn);
 317
 318 struct kvm_irq_ack_notifier {
 319         struct hlist_node link;
 320         unsigned gsi;
 321         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 322 };
 323
 324 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 325 struct kvm_guest_msix_entry {
 326         u32 vector;
 327         u16 entry;
 328         u16 flags;
 329 };
 330
 331 struct kvm_assigned_dev_kernel {
 332         struct kvm_irq_ack_notifier ack_notifier;
 333         struct work_struct interrupt_work;
 334         struct list_head list;
 335         int assigned_dev_id;
 336         int host_busnr;
 337         int host_devfn;
 338         unsigned int entries_nr;
 339         int host_irq;
 340         bool host_irq_disabled;
 341         struct msix_entry *host_msix_entries;
 342         int guest_irq;
 343         struct kvm_guest_msix_entry *guest_msix_entries;
 344         unsigned long irq_requested_type;
 345         int irq_source_id;
 346         int flags;
 347         struct pci_dev *dev;
 348         struct kvm *kvm;
 349         spinlock_t assigned_dev_lock;
 350 };
 351
 352 struct kvm_irq_mask_notifier {
 353         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 354         int irq;
 355         struct hlist_node link;
 356 };
 357
 358 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 359                                     struct kvm_irq_mask_notifier *kimn);
 360 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 361                                       struct kvm_irq_mask_notifier *kimn);
 362 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 363
 364 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
 365 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 366 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 367                                    struct kvm_irq_ack_notifier *kian);
 368 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
 369 int kvm_request_irq_source_id(struct kvm *kvm);
 370 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 371
 372 /* For vcpu->arch.iommu_flags */
 373 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 374
 375 #ifdef CONFIG_IOMMU_API
 376 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 377                         unsigned long npages);
 378 int kvm_iommu_map_guest(struct kvm *kvm);
 379 int kvm_iommu_unmap_guest(struct kvm *kvm);
 380 int kvm_assign_device(struct kvm *kvm,
 381                       struct kvm_assigned_dev_kernel *assigned_dev);
 382 int kvm_deassign_device(struct kvm *kvm,
 383                         struct kvm_assigned_dev_kernel *assigned_dev);
 384 #else /* CONFIG_IOMMU_API */
 385 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 386                                       gfn_t base_gfn,
 387                                       unsigned long npages)
 388 {
 389         return 0;
 390 }
 391
 392 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 393 {
 394         return -ENODEV;
 395 }
 396
 397 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 398 {
 399         return 0;
 400 }
 401
 402 static inline int kvm_assign_device(struct kvm *kvm,
 403                 struct kvm_assigned_dev_kernel *assigned_dev)
 404 {
 405         return 0;
 406 }
 407
 408 static inline int kvm_deassign_device(struct kvm *kvm,
 409                 struct kvm_assigned_dev_kernel *assigned_dev)
 410 {
 411         return 0;
 412 }
 413 #endif /* CONFIG_IOMMU_API */
 414
 415 static inline void kvm_guest_enter(void)
 416 {
 417         account_system_vtime(current);
 418         current->flags |= PF_VCPU;
 419 }
 420
 421 static inline void kvm_guest_exit(void)
 422 {
 423         account_system_vtime(current);
 424         current->flags &= ~PF_VCPU;
 425 }
 426
 427 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 428 {
 429         return slot - kvm->memslots;
 430 }
 431
 432 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 433 {
 434         return (gpa_t)gfn << PAGE_SHIFT;
 435 }
 436
 437 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 438 {
 439         return (hpa_t)pfn << PAGE_SHIFT;
 440 }
 441
 442 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 443 {
 444         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 445 }
 446
 447 enum kvm_stat_kind {
 448         KVM_STAT_VM,
 449         KVM_STAT_VCPU,
 450 };
 451
 452 struct kvm_stats_debugfs_item {
 453         const char *name;
 454         int offset;
 455         enum kvm_stat_kind kind;
 456         struct dentry *dentry;
 457 };
 458 extern struct kvm_stats_debugfs_item debugfs_entries[];
 459 extern struct dentry *kvm_debugfs_dir;
 460
 461 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 462         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 463                                                 vcpu, 5, d1, d2, d3, d4, d5)
 464 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 465         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 466                                                 vcpu, 4, d1, d2, d3, d4, 0)
 467 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 468         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 469                                                 vcpu, 3, d1, d2, d3, 0, 0)
 470 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 471         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 472                                                 vcpu, 2, d1, d2, 0, 0, 0)
 473 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 474         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 475                                                 vcpu, 1, d1, 0, 0, 0, 0)
 476 #define KVMTRACE_0D(evt, vcpu, name) \
 477         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 478                                                 vcpu, 0, 0, 0, 0, 0, 0)
 479
 480 #ifdef CONFIG_KVM_TRACE
 481 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
 482 void kvm_trace_cleanup(void);
 483 #else
 484 static inline
 485 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
 486 {
 487         return -EINVAL;
 488 }
 489 #define kvm_trace_cleanup() ((void)0)
 490 #endif
 491
 492 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 493 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 494 {
 495         if (unlikely(vcpu->kvm->mmu_notifier_count))
 496                 return 1;
 497         /*
 498          * Both reads happen under the mmu_lock and both values are
 499          * modified under mmu_lock, so there's no need of smb_rmb()
 500          * here in between, otherwise mmu_notifier_count should be
 501          * read before mmu_notifier_seq, see
 502          * mmu_notifier_invalidate_range_end write side.
 503          */
 504         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 505                 return 1;
 506         return 0;
 507 }
 508 #endif
 509
 510 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 511
 512 #define KVM_MAX_IRQ_ROUTES 1024
 513
 514 int kvm_setup_default_irq_routing(struct kvm *kvm);
 515 int kvm_set_irq_routing(struct kvm *kvm,
 516                         const struct kvm_irq_routing_entry *entries,
 517                         unsigned nr,
 518                         unsigned flags);
 519 void kvm_free_irq_routing(struct kvm *kvm);
 520
 521 #else
 522
 523 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 524
 525 #endif
 526
 527 #endif