1 /*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This header defines architecture specific interfaces, x86 version
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
8 *
9 */
10
11 #ifndef _ASM_X86_KVM_HOST_H
12 #define _ASM_X86_KVM_HOST_H
13
14 #include <linux/types.h>
15 #include <linux/mm.h>
16 #include <linux/mmu_notifier.h>
17
18 #include <linux/kvm.h>
19 #include <linux/kvm_para.h>
20 #include <linux/kvm_types.h>
21
22 #include <asm/pvclock-abi.h>
23 #include <asm/desc.h>
24 #include <asm/mtrr.h>
25
26 #define KVM_MAX_VCPUS 16
27 #define KVM_MEMORY_SLOTS 32
28 /* memory slots that does not exposed to userspace */
29 #define KVM_PRIVATE_MEM_SLOTS 4
30
31 #define KVM_PIO_PAGE_OFFSET 1
32 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
33
34 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
35 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
36 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
37 0xFFFFFF0000000000ULL)
38
39 #define KVM_GUEST_CR0_MASK \
40 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
41 | X86_CR0_NW | X86_CR0_CD)
42 #define KVM_VM_CR0_ALWAYS_ON \
43 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
44 | X86_CR0_MP)
45 #define KVM_GUEST_CR4_MASK \
46 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
47 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
48 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
49
50 #define INVALID_PAGE (~(hpa_t)0)
51 #define UNMAPPED_GVA (~(gpa_t)0)
52
53 /* shadow tables are PAE even on non-PAE hosts */
54 #define KVM_HPAGE_SHIFT 21
55 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
56 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
57
58 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
59
60 #define DE_VECTOR 0
61 #define DB_VECTOR 1
62 #define BP_VECTOR 3
63 #define OF_VECTOR 4
64 #define BR_VECTOR 5
65 #define UD_VECTOR 6
66 #define NM_VECTOR 7
67 #define DF_VECTOR 8
68 #define TS_VECTOR 10
69 #define NP_VECTOR 11
70 #define SS_VECTOR 12
71 #define GP_VECTOR 13
72 #define PF_VECTOR 14
73 #define MF_VECTOR 16
74 #define MC_VECTOR 18
75
76 #define SELECTOR_TI_MASK (1 << 2)
77 #define SELECTOR_RPL_MASK 0x03
78
79 #define IOPL_SHIFT 12
80
81 #define KVM_ALIAS_SLOTS 4
82
83 #define KVM_PERMILLE_MMU_PAGES 20
84 #define KVM_MIN_ALLOC_MMU_PAGES 64
85 #define KVM_MMU_HASH_SHIFT 10
86 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
87 #define KVM_MIN_FREE_MMU_PAGES 5
88 #define KVM_REFILL_PAGES 25
89 #define KVM_MAX_CPUID_ENTRIES 40
90 #define KVM_NR_FIXED_MTRR_REGION 88
91 #define KVM_NR_VAR_MTRR 8
92
93 extern spinlock_t kvm_lock;
94 extern struct list_head vm_list;
95
96 struct kvm_vcpu;
97 struct kvm;
98
99 enum kvm_reg {
100 VCPU_REGS_RAX = 0,
101 VCPU_REGS_RCX = 1,
102 VCPU_REGS_RDX = 2,
103 VCPU_REGS_RBX = 3,
104 VCPU_REGS_RSP = 4,
105 VCPU_REGS_RBP = 5,
106 VCPU_REGS_RSI = 6,
107 VCPU_REGS_RDI = 7,
108 #ifdef CONFIG_X86_64
109 VCPU_REGS_R8 = 8,
110 VCPU_REGS_R9 = 9,
111 VCPU_REGS_R10 = 10,
112 VCPU_REGS_R11 = 11,
113 VCPU_REGS_R12 = 12,
114 VCPU_REGS_R13 = 13,
115 VCPU_REGS_R14 = 14,
116 VCPU_REGS_R15 = 15,
117 #endif
118 VCPU_REGS_RIP,
119 NR_VCPU_REGS
120 };
121
122 enum {
123 VCPU_SREG_ES,
124 VCPU_SREG_CS,
125 VCPU_SREG_SS,
126 VCPU_SREG_DS,
127 VCPU_SREG_FS,
128 VCPU_SREG_GS,
129 VCPU_SREG_TR,
130 VCPU_SREG_LDTR,
131 };
132
133 #include <asm/kvm_x86_emulate.h>
134
135 #define KVM_NR_MEM_OBJS 40
136
137 struct kvm_guest_debug {
138 int enabled;
139 unsigned long bp[4];
140 int singlestep;
141 };
142
143 /*
144 * We don't want allocation failures within the mmu code, so we preallocate
145 * enough memory for a single page fault in a cache.
146 */
147 struct kvm_mmu_memory_cache {
148 int nobjs;
149 void *objects[KVM_NR_MEM_OBJS];
150 };
151
152 #define NR_PTE_CHAIN_ENTRIES 5
153
154 struct kvm_pte_chain {
155 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
156 struct hlist_node link;
157 };
158
159 /*
160 * kvm_mmu_page_role, below, is defined as:
161 *
162 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
163 * bits 4:7 - page table level for this shadow (1-4)
164 * bits 8:9 - page table quadrant for 2-level guests
165 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
166 * bits 17:19 - common access permissions for all ptes in this shadow page
167 */
168 union kvm_mmu_page_role {
169 unsigned word;
170 struct {
171 unsigned glevels:4;
172 unsigned level:4;
173 unsigned quadrant:2;
174 unsigned pad_for_nice_hex_output:6;
175 unsigned metaphysical:1;
176 unsigned access:3;
177 unsigned invalid:1;
178 };
179 };
180
181 struct kvm_mmu_page {
182 struct list_head link;
183 struct hlist_node hash_link;
184
185 struct list_head oos_link;
186
187 /*
188 * The following two entries are used to key the shadow page in the
189 * hash table.
190 */
191 gfn_t gfn;
192 union kvm_mmu_page_role role;
193
194 u64 *spt;
195 /* hold the gfn of each spte inside spt */
196 gfn_t *gfns;
197 /*
198 * One bit set per slot which has memory
199 * in this shadow page.
200 */
201 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
202 int multimapped; /* More than one parent_pte? */
203 int root_count; /* Currently serving as active root */
204 bool unsync;
205 bool global;
206 unsigned int unsync_children;
207 union {
208 u64 *parent_pte; /* !multimapped */
209 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
210 };
211 DECLARE_BITMAP(unsync_child_bitmap, 512);
212 };
213
214 struct kvm_pv_mmu_op_buffer {
215 void *ptr;
216 unsigned len;
217 unsigned processed;
218 char buf[512] __aligned(sizeof(long));
219 };
220
221 /*
222 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
223 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
224 * mode.
225 */
226 struct kvm_mmu {
227 void (*new_cr3)(struct kvm_vcpu *vcpu);
228 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
229 void (*free)(struct kvm_vcpu *vcpu);
230 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
231 void (*prefetch_page)(struct kvm_vcpu *vcpu,
232 struct kvm_mmu_page *page);
233 int (*sync_page)(struct kvm_vcpu *vcpu,
234 struct kvm_mmu_page *sp);
235 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
236 hpa_t root_hpa;
237 int root_level;
238 int shadow_root_level;
239
240 u64 *pae_root;
241 };
242
243 struct kvm_vcpu_arch {
244 u64 host_tsc;
245 int interrupt_window_open;
246 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
247 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
248 /*
249 * rip and regs accesses must go through
250 * kvm_{register,rip}_{read,write} functions.
251 */
252 unsigned long regs[NR_VCPU_REGS];
253 u32 regs_avail;
254 u32 regs_dirty;
255
256 unsigned long cr0;
257 unsigned long cr2;
258 unsigned long cr3;
259 unsigned long cr4;
260 unsigned long cr8;
261 u64 pdptrs[4]; /* pae */
262 u64 shadow_efer;
263 u64 apic_base;
264 struct kvm_lapic *apic; /* kernel irqchip context */
265 int mp_state;
266 int sipi_vector;
267 u64 ia32_misc_enable_msr;
268 bool tpr_access_reporting;
269
270 struct kvm_mmu mmu;
271 /* only needed in kvm_pv_mmu_op() path, but it's hot so
272 * put it here to avoid allocation */
273 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
274
275 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
276 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
277 struct kvm_mmu_memory_cache mmu_page_cache;
278 struct kvm_mmu_memory_cache mmu_page_header_cache;
279
280 gfn_t last_pt_write_gfn;
281 int last_pt_write_count;
282 u64 *last_pte_updated;
283 gfn_t last_pte_gfn;
284
285 struct {
286 gfn_t gfn; /* presumed gfn during guest pte update */
287 pfn_t pfn; /* pfn corresponding to that gfn */
288 int largepage;
289 unsigned long mmu_seq;
290 } update_pte;
291
292 struct i387_fxsave_struct host_fx_image;
293 struct i387_fxsave_struct guest_fx_image;
294
295 gva_t mmio_fault_cr2;
296 struct kvm_pio_request pio;
297 void *pio_data;
298
299 struct kvm_queued_exception {
300 bool pending;
301 bool has_error_code;
302 u8 nr;
303 u32 error_code;
304 } exception;
305
306 struct kvm_queued_interrupt {
307 bool pending;
308 u8 nr;
309 } interrupt;
310
311 struct {
312 int active;
313 u8 save_iopl;
314 struct kvm_save_segment {
315 u16 selector;
316 unsigned long base;
317 u32 limit;
318 u32 ar;
319 } tr, es, ds, fs, gs;
320 } rmode;
321 int halt_request; /* real mode on Intel only */
322
323 int cpuid_nent;
324 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
325 /* emulate context */
326
327 struct x86_emulate_ctxt emulate_ctxt;
328
329 gpa_t time;
330 struct pvclock_vcpu_time_info hv_clock;
331 unsigned int hv_clock_tsc_khz;
332 unsigned int time_offset;
333 struct page *time_page;
334
335 bool nmi_pending;
336 bool nmi_injected;
337 bool nmi_window_open;
338
339 struct mtrr_state_type mtrr_state;
340 u32 pat;
341 };
342
343 struct kvm_mem_alias {
344 gfn_t base_gfn;
345 unsigned long npages;
346 gfn_t target_gfn;
347 };
348
349 struct kvm_arch{
350 int naliases;
351 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
352
353 unsigned int n_free_mmu_pages;
354 unsigned int n_requested_mmu_pages;
355 unsigned int n_alloc_mmu_pages;
356 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
357 /*
358 * Hash table of struct kvm_mmu_page.
359 */
360 struct list_head active_mmu_pages;
361 struct list_head assigned_dev_head;
362 struct list_head oos_global_pages;
363 struct iommu_domain *iommu_domain;
364 struct kvm_pic *vpic;
365 struct kvm_ioapic *vioapic;
366 struct kvm_pit *vpit;
367 struct hlist_head irq_ack_notifier_list;
368 int vapics_in_nmi_mode;
369
370 int round_robin_prev_vcpu;
371 unsigned int tss_addr;
372 struct page *apic_access_page;
373
374 gpa_t wall_clock;
375
376 struct page *ept_identity_pagetable;
377 bool ept_identity_pagetable_done;
378
379 unsigned long irq_sources_bitmap;
380 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
381 };
382
383 struct kvm_vm_stat {
384 u32 mmu_shadow_zapped;
385 u32 mmu_pte_write;
386 u32 mmu_pte_updated;
387 u32 mmu_pde_zapped;
388 u32 mmu_flooded;
389 u32 mmu_recycled;
390 u32 mmu_cache_miss;
391 u32 mmu_unsync;
392 u32 mmu_unsync_global;
393 u32 remote_tlb_flush;
394 u32 lpages;
395 };
396
397 struct kvm_vcpu_stat {
398 u32 pf_fixed;
399 u32 pf_guest;
400 u32 tlb_flush;
401 u32 invlpg;
402
403 u32 exits;
404 u32 io_exits;
405 u32 mmio_exits;
406 u32 signal_exits;
407 u32 irq_window_exits;
408 u32 nmi_window_exits;
409 u32 halt_exits;
410 u32 halt_wakeup;
411 u32 request_irq_exits;
412 u32 request_nmi_exits;
413 u32 irq_exits;
414 u32 host_state_reload;
415 u32 efer_reload;
416 u32 fpu_reload;
417 u32 insn_emulation;
418 u32 insn_emulation_fail;
419 u32 hypercalls;
420 u32 irq_injections;
421 u32 nmi_injections;
422 };
423
424 struct descriptor_table {
425 u16 limit;
426 unsigned long base;
427 } __attribute__((packed));
428
429 struct kvm_x86_ops {
430 int (*cpu_has_kvm_support)(void); /* __init */
431 int (*disabled_by_bios)(void); /* __init */
432 void (*hardware_enable)(void *dummy); /* __init */
433 void (*hardware_disable)(void *dummy);
434 void (*check_processor_compatibility)(void *rtn);
435 int (*hardware_setup)(void); /* __init */
436 void (*hardware_unsetup)(void); /* __exit */
437 bool (*cpu_has_accelerated_tpr)(void);
438
439 /* Create, but do not attach this VCPU */
440 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
441 void (*vcpu_free)(struct kvm_vcpu *vcpu);
442 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
443
444 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
445 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
446 void (*vcpu_put)(struct kvm_vcpu *vcpu);
447
448 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
449 struct kvm_debug_guest *dbg);
450 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
451 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
452 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
453 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
454 void (*get_segment)(struct kvm_vcpu *vcpu,
455 struct kvm_segment *var, int seg);
456 int (*get_cpl)(struct kvm_vcpu *vcpu);
457 void (*set_segment)(struct kvm_vcpu *vcpu,
458 struct kvm_segment *var, int seg);
459 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
460 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
461 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
462 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
463 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
464 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
465 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
466 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
467 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
468 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
469 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
470 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
471 int *exception);
472 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
473 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
474 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
475
476 void (*tlb_flush)(struct kvm_vcpu *vcpu);
477
478 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
479 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
480 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
481 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
482 unsigned char *hypercall_addr);
483 int (*get_irq)(struct kvm_vcpu *vcpu);
484 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
485 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
486 bool has_error_code, u32 error_code);
487 bool (*exception_injected)(struct kvm_vcpu *vcpu);
488 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
489 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
490 struct kvm_run *run);
491
492 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
493 int (*get_tdp_level)(void);
494 int (*get_mt_mask_shift)(void);
495 };
496
497 extern struct kvm_x86_ops *kvm_x86_ops;
498
499 int kvm_mmu_module_init(void);
500 void kvm_mmu_module_exit(void);
501
502 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
503 int kvm_mmu_create(struct kvm_vcpu *vcpu);
504 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
505 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
506 void kvm_mmu_set_base_ptes(u64 base_pte);
507 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
508 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
509
510 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
511 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
512 void kvm_mmu_zap_all(struct kvm *kvm);
513 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
514 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
515
516 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
517
518 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
519 const void *val, int bytes);
520 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
521 gpa_t addr, unsigned long *ret);
522
523 extern bool tdp_enabled;
524
525 enum emulation_result {
526 EMULATE_DONE, /* no further processing */
527 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
528 EMULATE_FAIL, /* can't emulate this instruction */
529 };
530
531 #define EMULTYPE_NO_DECODE (1 << 0)
532 #define EMULTYPE_TRAP_UD (1 << 1)
533 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
534 unsigned long cr2, u16 error_code, int emulation_type);
535 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
536 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
537 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
538 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
539 unsigned long *rflags);
540
541 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
542 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
543 unsigned long *rflags);
544 void kvm_enable_efer_bits(u64);
545 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
546 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
547
548 struct x86_emulate_ctxt;
549
550 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
551 int size, unsigned port);
552 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
553 int size, unsigned long count, int down,
554 gva_t address, int rep, unsigned port);
555 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
556 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
557 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
558 int emulate_clts(struct kvm_vcpu *vcpu);
559 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
560 unsigned long *dest);
561 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
562 unsigned long value);
563
564 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
565 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
566 int type_bits, int seg);
567
568 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
569
570 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
571 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
572 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
573 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
574 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
575 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
576 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
577
578 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
579 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
580
581 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
582 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
583 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
584 u32 error_code);
585
586 void kvm_pic_set_irq(void *opaque, int irq, int level);
587
588 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
589
590 void fx_init(struct kvm_vcpu *vcpu);
591
592 int emulator_read_std(unsigned long addr,
593 void *val,
594 unsigned int bytes,
595 struct kvm_vcpu *vcpu);
596 int emulator_write_emulated(unsigned long addr,
597 const void *val,
598 unsigned int bytes,
599 struct kvm_vcpu *vcpu);
600
601 unsigned long segment_base(u16 selector);
602
603 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
604 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
605 const u8 *new, int bytes,
606 bool guest_initiated);
607 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
608 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
609 int kvm_mmu_load(struct kvm_vcpu *vcpu);
610 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
611 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
612 void kvm_mmu_sync_global(struct kvm_vcpu *vcpu);
613
614 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
615
616 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
617
618 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
619 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
620
621 void kvm_enable_tdp(void);
622 void kvm_disable_tdp(void);
623
624 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
625 int complete_pio(struct kvm_vcpu *vcpu);
626
627 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
628
page_header(hpa_t shadow_page)629 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
630 {
631 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
632
633 return (struct kvm_mmu_page *)page_private(page);
634 }
635
kvm_read_fs(void)636 static inline u16 kvm_read_fs(void)
637 {
638 u16 seg;
639 asm("mov %%fs, %0" : "=g"(seg));
640 return seg;
641 }
642
kvm_read_gs(void)643 static inline u16 kvm_read_gs(void)
644 {
645 u16 seg;
646 asm("mov %%gs, %0" : "=g"(seg));
647 return seg;
648 }
649
kvm_read_ldt(void)650 static inline u16 kvm_read_ldt(void)
651 {
652 u16 ldt;
653 asm("sldt %0" : "=g"(ldt));
654 return ldt;
655 }
656
kvm_load_fs(u16 sel)657 static inline void kvm_load_fs(u16 sel)
658 {
659 asm("mov %0, %%fs" : : "rm"(sel));
660 }
661
kvm_load_gs(u16 sel)662 static inline void kvm_load_gs(u16 sel)
663 {
664 asm("mov %0, %%gs" : : "rm"(sel));
665 }
666
kvm_load_ldt(u16 sel)667 static inline void kvm_load_ldt(u16 sel)
668 {
669 asm("lldt %0" : : "rm"(sel));
670 }
671
kvm_get_idt(struct descriptor_table * table)672 static inline void kvm_get_idt(struct descriptor_table *table)
673 {
674 asm("sidt %0" : "=m"(*table));
675 }
676
kvm_get_gdt(struct descriptor_table * table)677 static inline void kvm_get_gdt(struct descriptor_table *table)
678 {
679 asm("sgdt %0" : "=m"(*table));
680 }
681
kvm_read_tr_base(void)682 static inline unsigned long kvm_read_tr_base(void)
683 {
684 u16 tr;
685 asm("str %0" : "=g"(tr));
686 return segment_base(tr);
687 }
688
689 #ifdef CONFIG_X86_64
read_msr(unsigned long msr)690 static inline unsigned long read_msr(unsigned long msr)
691 {
692 u64 value;
693
694 rdmsrl(msr, value);
695 return value;
696 }
697 #endif
698
kvm_fx_save(struct i387_fxsave_struct * image)699 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
700 {
701 asm("fxsave (%0)":: "r" (image));
702 }
703
kvm_fx_restore(struct i387_fxsave_struct * image)704 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
705 {
706 asm("fxrstor (%0)":: "r" (image));
707 }
708
kvm_fx_finit(void)709 static inline void kvm_fx_finit(void)
710 {
711 asm("finit");
712 }
713
get_rdx_init_val(void)714 static inline u32 get_rdx_init_val(void)
715 {
716 return 0x600; /* P6 family */
717 }
718
kvm_inject_gp(struct kvm_vcpu * vcpu,u32 error_code)719 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
720 {
721 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
722 }
723
724 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
725
726 #define TSS_IOPB_BASE_OFFSET 0x66
727 #define TSS_BASE_SIZE 0x68
728 #define TSS_IOPB_SIZE (65536 / 8)
729 #define TSS_REDIRECTION_SIZE (256 / 8)
730 #define RMODE_TSS_SIZE \
731 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
732
733 enum {
734 TASK_SWITCH_CALL = 0,
735 TASK_SWITCH_IRET = 1,
736 TASK_SWITCH_JMP = 2,
737 TASK_SWITCH_GATE = 3,
738 };
739
740 /*
741 * Hardware virtualization extension instructions may fault if a
742 * reboot turns off virtualization while processes are running.
743 * Trap the fault and ignore the instruction if that happens.
744 */
745 asmlinkage void kvm_handle_fault_on_reboot(void);
746
747 #define __kvm_handle_fault_on_reboot(insn) \
748 "666: " insn "\n\t" \
749 ".pushsection .fixup, \"ax\" \n" \
750 "667: \n\t" \
751 __ASM_SIZE(push) " $666b \n\t" \
752 "jmp kvm_handle_fault_on_reboot \n\t" \
753 ".popsection \n\t" \
754 ".pushsection __ex_table, \"a\" \n\t" \
755 _ASM_PTR " 666b, 667b \n\t" \
756 ".popsection"
757
758 #define KVM_ARCH_WANT_MMU_NOTIFIER
759 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
760 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
761
762 #endif /* _ASM_X86_KVM_HOST_H */
763