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KVM: Portability: Move x86 instruction emulation code to x86.c
[linux-2.6/btrfs-unstable.git] / drivers / kvm / kvm.h
blobef2a6a8328ea15ca6c8bbdefd6c19edf509789e0
1 #ifndef __KVM_H
2 #define __KVM_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 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
24 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
25 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
26
27 #define KVM_GUEST_CR0_MASK \
28 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
29 | X86_CR0_NW | X86_CR0_CD)
30 #define KVM_VM_CR0_ALWAYS_ON \
31 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
32 | X86_CR0_MP)
33 #define KVM_GUEST_CR4_MASK \
34 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
35 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
36 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
37
38 #define INVALID_PAGE (~(hpa_t)0)
39 #define UNMAPPED_GVA (~(gpa_t)0)
40
41 #define KVM_MAX_VCPUS 4
42 #define KVM_ALIAS_SLOTS 4
43 #define KVM_MEMORY_SLOTS 8
44 /* memory slots that does not exposed to userspace */
45 #define KVM_PRIVATE_MEM_SLOTS 4
46 #define KVM_PERMILLE_MMU_PAGES 20
47 #define KVM_MIN_ALLOC_MMU_PAGES 64
48 #define KVM_NUM_MMU_PAGES 1024
49 #define KVM_MIN_FREE_MMU_PAGES 5
50 #define KVM_REFILL_PAGES 25
51 #define KVM_MAX_CPUID_ENTRIES 40
52
53 #define DE_VECTOR 0
54 #define UD_VECTOR 6
55 #define NM_VECTOR 7
56 #define DF_VECTOR 8
57 #define TS_VECTOR 10
58 #define NP_VECTOR 11
59 #define SS_VECTOR 12
60 #define GP_VECTOR 13
61 #define PF_VECTOR 14
62
63 #define SELECTOR_TI_MASK (1 << 2)
64 #define SELECTOR_RPL_MASK 0x03
65
66 #define IOPL_SHIFT 12
67
68 #define KVM_PIO_PAGE_OFFSET 1
69
70 /*
71 * vcpu->requests bit members
72 */
73 #define KVM_REQ_TLB_FLUSH 0
74
75 /*
76 * Address types:
77 *
78 * gva - guest virtual address
79 * gpa - guest physical address
80 * gfn - guest frame number
81 * hva - host virtual address
82 * hpa - host physical address
83 * hfn - host frame number
84 */
85
86 typedef unsigned long gva_t;
87 typedef u64 gpa_t;
88 typedef unsigned long gfn_t;
89
90 typedef unsigned long hva_t;
91 typedef u64 hpa_t;
92 typedef unsigned long hfn_t;
93
94 #define NR_PTE_CHAIN_ENTRIES 5
95
96 struct kvm_pte_chain {
97 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
98 struct hlist_node link;
99 };
100
101 /*
102 * kvm_mmu_page_role, below, is defined as:
103 *
104 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
105 * bits 4:7 - page table level for this shadow (1-4)
106 * bits 8:9 - page table quadrant for 2-level guests
107 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
108 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
109 */
110 union kvm_mmu_page_role {
111 unsigned word;
112 struct {
113 unsigned glevels : 4;
114 unsigned level : 4;
115 unsigned quadrant : 2;
116 unsigned pad_for_nice_hex_output : 6;
117 unsigned metaphysical : 1;
118 unsigned hugepage_access : 3;
119 };
120 };
121
122 struct kvm_mmu_page {
123 struct list_head link;
124 struct hlist_node hash_link;
125
126 /*
127 * The following two entries are used to key the shadow page in the
128 * hash table.
129 */
130 gfn_t gfn;
131 union kvm_mmu_page_role role;
132
133 u64 *spt;
134 /* hold the gfn of each spte inside spt */
135 gfn_t *gfns;
136 unsigned long slot_bitmap; /* One bit set per slot which has memory
137 * in this shadow page.
138 */
139 int multimapped; /* More than one parent_pte? */
140 int root_count; /* Currently serving as active root */
141 union {
142 u64 *parent_pte; /* !multimapped */
143 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
144 };
145 };
146
147 struct kvm_vcpu;
148 extern struct kmem_cache *kvm_vcpu_cache;
149
150 /*
151 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
152 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
153 * mode.
154 */
155 struct kvm_mmu {
156 void (*new_cr3)(struct kvm_vcpu *vcpu);
157 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
158 void (*free)(struct kvm_vcpu *vcpu);
159 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
160 void (*prefetch_page)(struct kvm_vcpu *vcpu,
161 struct kvm_mmu_page *page);
162 hpa_t root_hpa;
163 int root_level;
164 int shadow_root_level;
165
166 u64 *pae_root;
167 };
168
169 #define KVM_NR_MEM_OBJS 40
170
171 struct kvm_mmu_memory_cache {
172 int nobjs;
173 void *objects[KVM_NR_MEM_OBJS];
174 };
175
176 /*
177 * We don't want allocation failures within the mmu code, so we preallocate
178 * enough memory for a single page fault in a cache.
179 */
180 struct kvm_guest_debug {
181 int enabled;
182 unsigned long bp[4];
183 int singlestep;
184 };
185
186 enum {
187 VCPU_REGS_RAX = 0,
188 VCPU_REGS_RCX = 1,
189 VCPU_REGS_RDX = 2,
190 VCPU_REGS_RBX = 3,
191 VCPU_REGS_RSP = 4,
192 VCPU_REGS_RBP = 5,
193 VCPU_REGS_RSI = 6,
194 VCPU_REGS_RDI = 7,
195 #ifdef CONFIG_X86_64
196 VCPU_REGS_R8 = 8,
197 VCPU_REGS_R9 = 9,
198 VCPU_REGS_R10 = 10,
199 VCPU_REGS_R11 = 11,
200 VCPU_REGS_R12 = 12,
201 VCPU_REGS_R13 = 13,
202 VCPU_REGS_R14 = 14,
203 VCPU_REGS_R15 = 15,
204 #endif
205 NR_VCPU_REGS
206 };
207
208 enum {
209 VCPU_SREG_CS,
210 VCPU_SREG_DS,
211 VCPU_SREG_ES,
212 VCPU_SREG_FS,
213 VCPU_SREG_GS,
214 VCPU_SREG_SS,
215 VCPU_SREG_TR,
216 VCPU_SREG_LDTR,
217 };
218
219 #include "x86_emulate.h"
220
221 struct kvm_pio_request {
222 unsigned long count;
223 int cur_count;
224 struct page *guest_pages[2];
225 unsigned guest_page_offset;
226 int in;
227 int port;
228 int size;
229 int string;
230 int down;
231 int rep;
232 };
233
234 struct kvm_stat {
235 u32 pf_fixed;
236 u32 pf_guest;
237 u32 tlb_flush;
238 u32 invlpg;
239
240 u32 exits;
241 u32 io_exits;
242 u32 mmio_exits;
243 u32 signal_exits;
244 u32 irq_window_exits;
245 u32 halt_exits;
246 u32 halt_wakeup;
247 u32 request_irq_exits;
248 u32 irq_exits;
249 u32 light_exits;
250 u32 efer_reload;
251 };
252
253 struct kvm_io_device {
254 void (*read)(struct kvm_io_device *this,
255 gpa_t addr,
256 int len,
257 void *val);
258 void (*write)(struct kvm_io_device *this,
259 gpa_t addr,
260 int len,
261 const void *val);
262 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
263 void (*destructor)(struct kvm_io_device *this);
264
265 void *private;
266 };
267
268 static inline void kvm_iodevice_read(struct kvm_io_device *dev,
269 gpa_t addr,
270 int len,
271 void *val)
272 {
273 dev->read(dev, addr, len, val);
274 }
275
276 static inline void kvm_iodevice_write(struct kvm_io_device *dev,
277 gpa_t addr,
278 int len,
279 const void *val)
280 {
281 dev->write(dev, addr, len, val);
282 }
283
284 static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
285 {
286 return dev->in_range(dev, addr);
287 }
288
289 static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
290 {
291 if (dev->destructor)
292 dev->destructor(dev);
293 }
294
295 /*
296 * It would be nice to use something smarter than a linear search, TBD...
297 * Thankfully we dont expect many devices to register (famous last words :),
298 * so until then it will suffice. At least its abstracted so we can change
299 * in one place.
300 */
301 struct kvm_io_bus {
302 int dev_count;
303 #define NR_IOBUS_DEVS 6
304 struct kvm_io_device *devs[NR_IOBUS_DEVS];
305 };
306
307 void kvm_io_bus_init(struct kvm_io_bus *bus);
308 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
309 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
310 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
311 struct kvm_io_device *dev);
312
313 #ifdef CONFIG_HAS_IOMEM
314 #define KVM_VCPU_MMIO \
315 int mmio_needed; \
316 int mmio_read_completed; \
317 int mmio_is_write; \
318 int mmio_size; \
319 unsigned char mmio_data[8]; \
320 gpa_t mmio_phys_addr;
321
322 #else
323 #define KVM_VCPU_MMIO
324
325 #endif
326
327 #define KVM_VCPU_COMM \
328 struct kvm *kvm; \
329 struct preempt_notifier preempt_notifier; \
330 int vcpu_id; \
331 struct mutex mutex; \
332 int cpu; \
333 struct kvm_run *run; \
334 int guest_mode; \
335 unsigned long requests; \
336 struct kvm_guest_debug guest_debug; \
337 int fpu_active; \
338 int guest_fpu_loaded; \
339 wait_queue_head_t wq; \
340 int sigset_active; \
341 sigset_t sigset; \
342 struct kvm_stat stat; \
343 KVM_VCPU_MMIO
344
345 struct kvm_mem_alias {
346 gfn_t base_gfn;
347 unsigned long npages;
348 gfn_t target_gfn;
349 };
350
351 struct kvm_memory_slot {
352 gfn_t base_gfn;
353 unsigned long npages;
354 unsigned long flags;
355 unsigned long *rmap;
356 unsigned long *dirty_bitmap;
357 unsigned long userspace_addr;
358 int user_alloc;
359 };
360
361 struct kvm {
362 struct mutex lock; /* protects everything except vcpus */
363 int naliases;
364 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
365 int nmemslots;
366 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
367 KVM_PRIVATE_MEM_SLOTS];
368 /*
369 * Hash table of struct kvm_mmu_page.
370 */
371 struct list_head active_mmu_pages;
372 unsigned int n_free_mmu_pages;
373 unsigned int n_requested_mmu_pages;
374 unsigned int n_alloc_mmu_pages;
375 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
376 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
377 unsigned long rmap_overflow;
378 struct list_head vm_list;
379 struct file *filp;
380 struct kvm_io_bus mmio_bus;
381 struct kvm_io_bus pio_bus;
382 struct kvm_pic *vpic;
383 struct kvm_ioapic *vioapic;
384 int round_robin_prev_vcpu;
385 unsigned int tss_addr;
386 struct page *apic_access_page;
387 };
388
389 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
390 {
391 return kvm->vpic;
392 }
393
394 static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
395 {
396 return kvm->vioapic;
397 }
398
399 static inline int irqchip_in_kernel(struct kvm *kvm)
400 {
401 return pic_irqchip(kvm) != 0;
402 }
403
404 struct descriptor_table {
405 u16 limit;
406 unsigned long base;
407 } __attribute__((packed));
408
409 struct kvm_x86_ops {
410 int (*cpu_has_kvm_support)(void); /* __init */
411 int (*disabled_by_bios)(void); /* __init */
412 void (*hardware_enable)(void *dummy); /* __init */
413 void (*hardware_disable)(void *dummy);
414 void (*check_processor_compatibility)(void *rtn);
415 int (*hardware_setup)(void); /* __init */
416 void (*hardware_unsetup)(void); /* __exit */
417
418 /* Create, but do not attach this VCPU */
419 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
420 void (*vcpu_free)(struct kvm_vcpu *vcpu);
421 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
422
423 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
424 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
425 void (*vcpu_put)(struct kvm_vcpu *vcpu);
426 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
427
428 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
429 struct kvm_debug_guest *dbg);
430 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
431 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
432 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
433 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
434 void (*get_segment)(struct kvm_vcpu *vcpu,
435 struct kvm_segment *var, int seg);
436 void (*set_segment)(struct kvm_vcpu *vcpu,
437 struct kvm_segment *var, int seg);
438 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
439 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
440 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
441 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
442 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
443 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
444 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
445 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
446 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
447 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
448 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
449 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
450 int *exception);
451 void (*cache_regs)(struct kvm_vcpu *vcpu);
452 void (*decache_regs)(struct kvm_vcpu *vcpu);
453 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
454 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
455
456 void (*tlb_flush)(struct kvm_vcpu *vcpu);
457 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
458 unsigned long addr, u32 err_code);
459
460 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
461
462 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
463 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
464 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
465 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
466 unsigned char *hypercall_addr);
467 int (*get_irq)(struct kvm_vcpu *vcpu);
468 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
469 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
470 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
471 struct kvm_run *run);
472
473 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
474 };
475
476 extern struct kvm_x86_ops *kvm_x86_ops;
477
478 /* The guest did something we don't support. */
479 #define pr_unimpl(vcpu, fmt, ...) \
480 do { \
481 if (printk_ratelimit()) \
482 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
483 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
484 } while (0)
485
486 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
487 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
488
489 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
490 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
491
492 void vcpu_load(struct kvm_vcpu *vcpu);
493 void vcpu_put(struct kvm_vcpu *vcpu);
494
495
496 int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
497 struct module *module);
498 void kvm_exit_x86(void);
499
500 int kvm_mmu_module_init(void);
501 void kvm_mmu_module_exit(void);
502
503 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
504 int kvm_mmu_create(struct kvm_vcpu *vcpu);
505 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
506 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
507
508 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
509 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
510 void kvm_mmu_zap_all(struct kvm *kvm);
511 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
512
513 hpa_t gpa_to_hpa(struct kvm *kvm, gpa_t gpa);
514 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
515 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
516 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
517 hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
518 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
519
520 extern struct page *bad_page;
521
522 int is_error_page(struct page *page);
523 int kvm_set_memory_region(struct kvm *kvm,
524 struct kvm_userspace_memory_region *mem,
525 int user_alloc);
526 int __kvm_set_memory_region(struct kvm *kvm,
527 struct kvm_userspace_memory_region *mem,
528 int user_alloc);
529 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
530 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
531 void kvm_release_page(struct page *page);
532 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
533 int len);
534 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
535 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
536 int offset, int len);
537 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
538 unsigned long len);
539 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
540 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
541 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
542 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
543 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
544
545 enum emulation_result {
546 EMULATE_DONE, /* no further processing */
547 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
548 EMULATE_FAIL, /* can't emulate this instruction */
549 };
550
551 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
552 unsigned long cr2, u16 error_code, int no_decode);
553 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
554 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
555 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
556 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
557 unsigned long *rflags);
558
559 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
560 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
561 unsigned long *rflags);
562 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
563 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
564
565 struct x86_emulate_ctxt;
566
567 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
568 int size, unsigned port);
569 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
570 int size, unsigned long count, int down,
571 gva_t address, int rep, unsigned port);
572 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
573 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
574 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
575 int emulate_clts(struct kvm_vcpu *vcpu);
576 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
577 unsigned long *dest);
578 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
579 unsigned long value);
580
581 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
582 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
583 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
584 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
585 unsigned long get_cr8(struct kvm_vcpu *vcpu);
586 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
587 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
588
589 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
590 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
591
592 void fx_init(struct kvm_vcpu *vcpu);
593
594 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
595 void kvm_resched(struct kvm_vcpu *vcpu);
596 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
597 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
598 void kvm_flush_remote_tlbs(struct kvm *kvm);
599
600 int emulator_read_std(unsigned long addr,
601 void *val,
602 unsigned int bytes,
603 struct kvm_vcpu *vcpu);
604 int emulator_write_emulated(unsigned long addr,
605 const void *val,
606 unsigned int bytes,
607 struct kvm_vcpu *vcpu);
608
609 unsigned long segment_base(u16 selector);
610
611 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
612 const u8 *new, int bytes);
613 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
614 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
615 int kvm_mmu_load(struct kvm_vcpu *vcpu);
616 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
617
618 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
619
620 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
621
622 long kvm_arch_dev_ioctl(struct file *filp,
623 unsigned int ioctl, unsigned long arg);
624 long kvm_arch_vcpu_ioctl(struct file *filp,
625 unsigned int ioctl, unsigned long arg);
626 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
627 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
628 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
629 struct
630 kvm_userspace_memory_region *mem,
631 int user_alloc);
632 long kvm_arch_vm_ioctl(struct file *filp,
633 unsigned int ioctl, unsigned long arg);
634 void kvm_arch_destroy_vm(struct kvm *kvm);
635
636 __init void kvm_arch_init(void);
637
638 static inline void kvm_guest_enter(void)
639 {
640 account_system_vtime(current);
641 current->flags |= PF_VCPU;
642 }
643
644 static inline void kvm_guest_exit(void)
645 {
646 account_system_vtime(current);
647 current->flags &= ~PF_VCPU;
648 }
649
650 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
651 {
652 return slot - kvm->memslots;
653 }
654
655 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
656 {
657 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
658
659 return (struct kvm_mmu_page *)page_private(page);
660 }
661
662 static inline u16 read_fs(void)
663 {
664 u16 seg;
665 asm("mov %%fs, %0" : "=g"(seg));
666 return seg;
667 }
668
669 static inline u16 read_gs(void)
670 {
671 u16 seg;
672 asm("mov %%gs, %0" : "=g"(seg));
673 return seg;
674 }
675
676 static inline u16 read_ldt(void)
677 {
678 u16 ldt;
679 asm("sldt %0" : "=g"(ldt));
680 return ldt;
681 }
682
683 static inline void load_fs(u16 sel)
684 {
685 asm("mov %0, %%fs" : : "rm"(sel));
686 }
687
688 static inline void load_gs(u16 sel)
689 {
690 asm("mov %0, %%gs" : : "rm"(sel));
691 }
692
693 #ifndef load_ldt
694 static inline void load_ldt(u16 sel)
695 {
696 asm("lldt %0" : : "rm"(sel));
697 }
698 #endif
699
700 static inline void get_idt(struct descriptor_table *table)
701 {
702 asm("sidt %0" : "=m"(*table));
703 }
704
705 static inline void get_gdt(struct descriptor_table *table)
706 {
707 asm("sgdt %0" : "=m"(*table));
708 }
709
710 static inline unsigned long read_tr_base(void)
711 {
712 u16 tr;
713 asm("str %0" : "=g"(tr));
714 return segment_base(tr);
715 }
716
717 #ifdef CONFIG_X86_64
718 static inline unsigned long read_msr(unsigned long msr)
719 {
720 u64 value;
721
722 rdmsrl(msr, value);
723 return value;
724 }
725 #endif
726
727 static inline void fx_save(struct i387_fxsave_struct *image)
728 {
729 asm("fxsave (%0)":: "r" (image));
730 }
731
732 static inline void fx_restore(struct i387_fxsave_struct *image)
733 {
734 asm("fxrstor (%0)":: "r" (image));
735 }
736
737 static inline void fpu_init(void)
738 {
739 asm("finit");
740 }
741
742 static inline u32 get_rdx_init_val(void)
743 {
744 return 0x600; /* P6 family */
745 }
746
747 #define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
748 #define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
749 #define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
750 #define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
751 #define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
752 #define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
753 #define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
754 #define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
755 #define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
756
757 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
758
759 #define TSS_IOPB_BASE_OFFSET 0x66
760 #define TSS_BASE_SIZE 0x68
761 #define TSS_IOPB_SIZE (65536 / 8)
762 #define TSS_REDIRECTION_SIZE (256 / 8)
763 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
764
765 struct kvm_stats_debugfs_item {
766 const char *name;
767 int offset;
768 struct dentry *dentry;
769 };
770 extern struct kvm_stats_debugfs_item debugfs_entries[];
771
772 #endif
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