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 #include <asm/msr-index.h>
26
27 #define KVM_MAX_VCPUS 16
28 #define KVM_MEMORY_SLOTS 32
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 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
34
35 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
36 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
37 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
38 0xFFFFFF0000000000ULL)
39
40 #define KVM_GUEST_CR0_MASK \
41 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
42 | X86_CR0_NW | X86_CR0_CD)
43 #define KVM_VM_CR0_ALWAYS_ON \
44 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
45 | X86_CR0_MP)
46 #define KVM_GUEST_CR4_MASK \
47 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
48 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
49 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
50
51 #define INVALID_PAGE (~(hpa_t)0)
52 #define UNMAPPED_GVA (~(gpa_t)0)
53
54 /* shadow tables are PAE even on non-PAE hosts */
55 #define KVM_HPAGE_SHIFT 21
56 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
57 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
58
59 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
60
61 #define DE_VECTOR 0
62 #define DB_VECTOR 1
63 #define BP_VECTOR 3
64 #define OF_VECTOR 4
65 #define BR_VECTOR 5
66 #define UD_VECTOR 6
67 #define NM_VECTOR 7
68 #define DF_VECTOR 8
69 #define TS_VECTOR 10
70 #define NP_VECTOR 11
71 #define SS_VECTOR 12
72 #define GP_VECTOR 13
73 #define PF_VECTOR 14
74 #define MF_VECTOR 16
75 #define MC_VECTOR 18
76
77 #define SELECTOR_TI_MASK (1 << 2)
78 #define SELECTOR_RPL_MASK 0x03
79
80 #define IOPL_SHIFT 12
81
82 #define KVM_ALIAS_SLOTS 4
83
84 #define KVM_PERMILLE_MMU_PAGES 20
85 #define KVM_MIN_ALLOC_MMU_PAGES 64
86 #define KVM_MMU_HASH_SHIFT 10
87 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
88 #define KVM_MIN_FREE_MMU_PAGES 5
89 #define KVM_REFILL_PAGES 25
90 #define KVM_MAX_CPUID_ENTRIES 40
91 #define KVM_NR_FIXED_MTRR_REGION 88
92 #define KVM_NR_VAR_MTRR 8
93
94 extern spinlock_t kvm_lock;
95 extern struct list_head vm_list;
96
97 struct kvm_vcpu;
98 struct kvm;
99
100 enum kvm_reg {
101 VCPU_REGS_RAX = 0,
102 VCPU_REGS_RCX = 1,
103 VCPU_REGS_RDX = 2,
104 VCPU_REGS_RBX = 3,
105 VCPU_REGS_RSP = 4,
106 VCPU_REGS_RBP = 5,
107 VCPU_REGS_RSI = 6,
108 VCPU_REGS_RDI = 7,
109 #ifdef CONFIG_X86_64
110 VCPU_REGS_R8 = 8,
111 VCPU_REGS_R9 = 9,
112 VCPU_REGS_R10 = 10,
113 VCPU_REGS_R11 = 11,
114 VCPU_REGS_R12 = 12,
115 VCPU_REGS_R13 = 13,
116 VCPU_REGS_R14 = 14,
117 VCPU_REGS_R15 = 15,
118 #endif
119 VCPU_REGS_RIP,
120 NR_VCPU_REGS
121 };
122
123 enum {
124 VCPU_SREG_ES,
125 VCPU_SREG_CS,
126 VCPU_SREG_SS,
127 VCPU_SREG_DS,
128 VCPU_SREG_FS,
129 VCPU_SREG_GS,
130 VCPU_SREG_TR,
131 VCPU_SREG_LDTR,
132 };
133
134 #include <asm/kvm_x86_emulate.h>
135
136 #define KVM_NR_MEM_OBJS 40
137
138 #define KVM_NR_DB_REGS 4
139
140 #define DR6_BD (1 << 13)
141 #define DR6_BS (1 << 14)
142 #define DR6_FIXED_1 0xffff0ff0
143 #define DR6_VOLATILE 0x0000e00f
144
145 #define DR7_BP_EN_MASK 0x000000ff
146 #define DR7_GE (1 << 9)
147 #define DR7_GD (1 << 13)
148 #define DR7_FIXED_1 0x00000400
149 #define DR7_VOLATILE 0xffff23ff
150
151 /*
152 * We don't want allocation failures within the mmu code, so we preallocate
153 * enough memory for a single page fault in a cache.
154 */
155 struct kvm_mmu_memory_cache {
156 int nobjs;
157 void *objects[KVM_NR_MEM_OBJS];
158 };
159
160 #define NR_PTE_CHAIN_ENTRIES 5
161
162 struct kvm_pte_chain {
163 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
164 struct hlist_node link;
165 };
166
167 /*
168 * kvm_mmu_page_role, below, is defined as:
169 *
170 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
171 * bits 4:7 - page table level for this shadow (1-4)
172 * bits 8:9 - page table quadrant for 2-level guests
173 * bit 16 - direct mapping of virtual to physical mapping at gfn
174 * used for real mode and two-dimensional paging
175 * bits 17:19 - common access permissions for all ptes in this shadow page
176 */
177 union kvm_mmu_page_role {
178 unsigned word;
179 struct {
180 unsigned glevels:4;
181 unsigned level:4;
182 unsigned quadrant:2;
183 unsigned pad_for_nice_hex_output:6;
184 unsigned direct:1;
185 unsigned access:3;
186 unsigned invalid:1;
187 unsigned cr4_pge:1;
188 unsigned nxe:1;
189 };
190 };
191
192 struct kvm_mmu_page {
193 struct list_head link;
194 struct hlist_node hash_link;
195
196 struct list_head oos_link;
197
198 /*
199 * The following two entries are used to key the shadow page in the
200 * hash table.
201 */
202 gfn_t gfn;
203 union kvm_mmu_page_role role;
204
205 u64 *spt;
206 /* hold the gfn of each spte inside spt */
207 gfn_t *gfns;
208 /*
209 * One bit set per slot which has memory
210 * in this shadow page.
211 */
212 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
213 int multimapped; /* More than one parent_pte? */
214 int root_count; /* Currently serving as active root */
215 bool unsync;
216 unsigned int unsync_children;
217 union {
218 u64 *parent_pte; /* !multimapped */
219 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
220 };
221 DECLARE_BITMAP(unsync_child_bitmap, 512);
222 };
223
224 struct kvm_pv_mmu_op_buffer {
225 void *ptr;
226 unsigned len;
227 unsigned processed;
228 char buf[512] __aligned(sizeof(long));
229 };
230
231 struct kvm_pio_request {
232 unsigned long count;
233 int cur_count;
234 gva_t guest_gva;
235 int in;
236 int port;
237 int size;
238 int string;
239 int down;
240 int rep;
241 };
242
243 /*
244 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
245 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
246 * mode.
247 */
248 struct kvm_mmu {
249 void (*new_cr3)(struct kvm_vcpu *vcpu);
250 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
251 void (*free)(struct kvm_vcpu *vcpu);
252 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
253 void (*prefetch_page)(struct kvm_vcpu *vcpu,
254 struct kvm_mmu_page *page);
255 int (*sync_page)(struct kvm_vcpu *vcpu,
256 struct kvm_mmu_page *sp);
257 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
258 hpa_t root_hpa;
259 int root_level;
260 int shadow_root_level;
261 union kvm_mmu_page_role base_role;
262
263 u64 *pae_root;
264 u64 rsvd_bits_mask[2][4];
265 };
266
267 struct kvm_vcpu_arch {
268 u64 host_tsc;
269 /*
270 * rip and regs accesses must go through
271 * kvm_{register,rip}_{read,write} functions.
272 */
273 unsigned long regs[NR_VCPU_REGS];
274 u32 regs_avail;
275 u32 regs_dirty;
276
277 unsigned long cr0;
278 unsigned long cr2;
279 unsigned long cr3;
280 unsigned long cr4;
281 unsigned long cr8;
282 u32 hflags;
283 u64 pdptrs[4]; /* pae */
284 u64 shadow_efer;
285 u64 apic_base;
286 struct kvm_lapic *apic; /* kernel irqchip context */
287 int32_t apic_arb_prio;
288 int mp_state;
289 int sipi_vector;
290 u64 ia32_misc_enable_msr;
291 bool tpr_access_reporting;
292
293 struct kvm_mmu mmu;
294 /* only needed in kvm_pv_mmu_op() path, but it's hot so
295 * put it here to avoid allocation */
296 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
297
298 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
299 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
300 struct kvm_mmu_memory_cache mmu_page_cache;
301 struct kvm_mmu_memory_cache mmu_page_header_cache;
302
303 gfn_t last_pt_write_gfn;
304 int last_pt_write_count;
305 u64 *last_pte_updated;
306 gfn_t last_pte_gfn;
307
308 struct {
309 gfn_t gfn; /* presumed gfn during guest pte update */
310 pfn_t pfn; /* pfn corresponding to that gfn */
311 int largepage;
312 unsigned long mmu_seq;
313 } update_pte;
314
315 struct i387_fxsave_struct host_fx_image;
316 struct i387_fxsave_struct guest_fx_image;
317
318 gva_t mmio_fault_cr2;
319 struct kvm_pio_request pio;
320 void *pio_data;
321
322 u8 event_exit_inst_len;
323
324 struct kvm_queued_exception {
325 bool pending;
326 bool has_error_code;
327 u8 nr;
328 u32 error_code;
329 } exception;
330
331 struct kvm_queued_interrupt {
332 bool pending;
333 bool soft;
334 u8 nr;
335 } interrupt;
336
337 struct {
338 int vm86_active;
339 u8 save_iopl;
340 struct kvm_save_segment {
341 u16 selector;
342 unsigned long base;
343 u32 limit;
344 u32 ar;
345 } tr, es, ds, fs, gs;
346 } rmode;
347 int halt_request; /* real mode on Intel only */
348
349 int cpuid_nent;
350 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
351 /* emulate context */
352
353 struct x86_emulate_ctxt emulate_ctxt;
354
355 gpa_t time;
356 struct pvclock_vcpu_time_info hv_clock;
357 unsigned int hv_clock_tsc_khz;
358 unsigned int time_offset;
359 struct page *time_page;
360
361 bool singlestep; /* guest is single stepped by KVM */
362 bool nmi_pending;
363 bool nmi_injected;
364
365 struct mtrr_state_type mtrr_state;
366 u32 pat;
367
368 int switch_db_regs;
369 unsigned long host_db[KVM_NR_DB_REGS];
370 unsigned long host_dr6;
371 unsigned long host_dr7;
372 unsigned long db[KVM_NR_DB_REGS];
373 unsigned long dr6;
374 unsigned long dr7;
375 unsigned long eff_db[KVM_NR_DB_REGS];
376 };
377
378 struct kvm_mem_alias {
379 gfn_t base_gfn;
380 unsigned long npages;
381 gfn_t target_gfn;
382 };
383
384 struct kvm_arch{
385 int naliases;
386 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
387
388 unsigned int n_free_mmu_pages;
389 unsigned int n_requested_mmu_pages;
390 unsigned int n_alloc_mmu_pages;
391 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
392 /*
393 * Hash table of struct kvm_mmu_page.
394 */
395 struct list_head active_mmu_pages;
396 struct list_head assigned_dev_head;
397 struct iommu_domain *iommu_domain;
398 int iommu_flags;
399 struct kvm_pic *vpic;
400 struct kvm_ioapic *vioapic;
401 struct kvm_pit *vpit;
402 struct hlist_head irq_ack_notifier_list;
403 int vapics_in_nmi_mode;
404
405 unsigned int tss_addr;
406 struct page *apic_access_page;
407
408 gpa_t wall_clock;
409
410 struct page *ept_identity_pagetable;
411 bool ept_identity_pagetable_done;
412
413 unsigned long irq_sources_bitmap;
414 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
415 u64 vm_init_tsc;
416 };
417
418 struct kvm_vm_stat {
419 u32 mmu_shadow_zapped;
420 u32 mmu_pte_write;
421 u32 mmu_pte_updated;
422 u32 mmu_pde_zapped;
423 u32 mmu_flooded;
424 u32 mmu_recycled;
425 u32 mmu_cache_miss;
426 u32 mmu_unsync;
427 u32 remote_tlb_flush;
428 u32 lpages;
429 };
430
431 struct kvm_vcpu_stat {
432 u32 pf_fixed;
433 u32 pf_guest;
434 u32 tlb_flush;
435 u32 invlpg;
436
437 u32 exits;
438 u32 io_exits;
439 u32 mmio_exits;
440 u32 signal_exits;
441 u32 irq_window_exits;
442 u32 nmi_window_exits;
443 u32 halt_exits;
444 u32 halt_wakeup;
445 u32 request_irq_exits;
446 u32 irq_exits;
447 u32 host_state_reload;
448 u32 efer_reload;
449 u32 fpu_reload;
450 u32 insn_emulation;
451 u32 insn_emulation_fail;
452 u32 hypercalls;
453 u32 irq_injections;
454 u32 nmi_injections;
455 };
456
457 struct descriptor_table {
458 u16 limit;
459 unsigned long base;
460 } __attribute__((packed));
461
462 struct kvm_x86_ops {
463 int (*cpu_has_kvm_support)(void); /* __init */
464 int (*disabled_by_bios)(void); /* __init */
465 void (*hardware_enable)(void *dummy); /* __init */
466 void (*hardware_disable)(void *dummy);
467 void (*check_processor_compatibility)(void *rtn);
468 int (*hardware_setup)(void); /* __init */
469 void (*hardware_unsetup)(void); /* __exit */
470 bool (*cpu_has_accelerated_tpr)(void);
471
472 /* Create, but do not attach this VCPU */
473 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
474 void (*vcpu_free)(struct kvm_vcpu *vcpu);
475 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
476
477 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
478 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
479 void (*vcpu_put)(struct kvm_vcpu *vcpu);
480
481 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
482 struct kvm_guest_debug *dbg);
483 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
484 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
485 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
486 void (*get_segment)(struct kvm_vcpu *vcpu,
487 struct kvm_segment *var, int seg);
488 int (*get_cpl)(struct kvm_vcpu *vcpu);
489 void (*set_segment)(struct kvm_vcpu *vcpu,
490 struct kvm_segment *var, int seg);
491 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
492 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
493 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
494 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
495 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
496 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
497 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
498 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
499 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
500 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
501 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
502 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
503 int *exception);
504 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
505 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
506 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
507
508 void (*tlb_flush)(struct kvm_vcpu *vcpu);
509
510 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
511 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
512 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
513 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
514 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
515 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
516 unsigned char *hypercall_addr);
517 void (*set_irq)(struct kvm_vcpu *vcpu);
518 void (*set_nmi)(struct kvm_vcpu *vcpu);
519 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
520 bool has_error_code, u32 error_code);
521 int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
522 int (*nmi_allowed)(struct kvm_vcpu *vcpu);
523 void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
524 void (*enable_irq_window)(struct kvm_vcpu *vcpu);
525 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
526 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
527 int (*get_tdp_level)(void);
528 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
529 };
530
531 extern struct kvm_x86_ops *kvm_x86_ops;
532
533 int kvm_mmu_module_init(void);
534 void kvm_mmu_module_exit(void);
535
536 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
537 int kvm_mmu_create(struct kvm_vcpu *vcpu);
538 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
539 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
540 void kvm_mmu_set_base_ptes(u64 base_pte);
541 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
542 u64 dirty_mask, u64 nx_mask, u64 x_mask);
543
544 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
545 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
546 void kvm_mmu_zap_all(struct kvm *kvm);
547 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
548 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
549
550 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
551
552 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
553 const void *val, int bytes);
554 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
555 gpa_t addr, unsigned long *ret);
556 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
557
558 extern bool tdp_enabled;
559
560 enum emulation_result {
561 EMULATE_DONE, /* no further processing */
562 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
563 EMULATE_FAIL, /* can't emulate this instruction */
564 };
565
566 #define EMULTYPE_NO_DECODE (1 << 0)
567 #define EMULTYPE_TRAP_UD (1 << 1)
568 #define EMULTYPE_SKIP (1 << 2)
569 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
570 unsigned long cr2, u16 error_code, int emulation_type);
571 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
572 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
573 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
574 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
575 unsigned long *rflags);
576
577 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
578 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
579 unsigned long *rflags);
580 void kvm_enable_efer_bits(u64);
581 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
582 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
583
584 struct x86_emulate_ctxt;
585
586 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
587 int size, unsigned port);
588 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
589 int size, unsigned long count, int down,
590 gva_t address, int rep, unsigned port);
591 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
592 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
593 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
594 int emulate_clts(struct kvm_vcpu *vcpu);
595 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
596 unsigned long *dest);
597 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
598 unsigned long value);
599
600 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
601 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
602 int type_bits, int seg);
603
604 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
605
606 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
607 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
608 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
609 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
610 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
611 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
612 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
613
614 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
615 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
616
617 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
618 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
619 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
620 u32 error_code);
621 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
622
623 int kvm_pic_set_irq(void *opaque, int irq, int level);
624
625 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
626
627 void fx_init(struct kvm_vcpu *vcpu);
628
629 int emulator_write_emulated(unsigned long addr,
630 const void *val,
631 unsigned int bytes,
632 struct kvm_vcpu *vcpu);
633
634 unsigned long segment_base(u16 selector);
635
636 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
637 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
638 const u8 *new, int bytes,
639 bool guest_initiated);
640 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
641 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
642 int kvm_mmu_load(struct kvm_vcpu *vcpu);
643 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
644 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
645
646 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
647
648 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
649
650 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
651 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
652
653 void kvm_enable_tdp(void);
654 void kvm_disable_tdp(void);
655
656 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
657 int complete_pio(struct kvm_vcpu *vcpu);
658
659 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
660
661 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
662 {
663 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
664
665 return (struct kvm_mmu_page *)page_private(page);
666 }
667
668 static inline u16 kvm_read_fs(void)
669 {
670 u16 seg;
671 asm("mov %%fs, %0" : "=g"(seg));
672 return seg;
673 }
674
675 static inline u16 kvm_read_gs(void)
676 {
677 u16 seg;
678 asm("mov %%gs, %0" : "=g"(seg));
679 return seg;
680 }
681
682 static inline u16 kvm_read_ldt(void)
683 {
684 u16 ldt;
685 asm("sldt %0" : "=g"(ldt));
686 return ldt;
687 }
688
689 static inline void kvm_load_fs(u16 sel)
690 {
691 asm("mov %0, %%fs" : : "rm"(sel));
692 }
693
694 static inline void kvm_load_gs(u16 sel)
695 {
696 asm("mov %0, %%gs" : : "rm"(sel));
697 }
698
699 static inline void kvm_load_ldt(u16 sel)
700 {
701 asm("lldt %0" : : "rm"(sel));
702 }
703
704 static inline void kvm_get_idt(struct descriptor_table *table)
705 {
706 asm("sidt %0" : "=m"(*table));
707 }
708
709 static inline void kvm_get_gdt(struct descriptor_table *table)
710 {
711 asm("sgdt %0" : "=m"(*table));
712 }
713
714 static inline unsigned long kvm_read_tr_base(void)
715 {
716 u16 tr;
717 asm("str %0" : "=g"(tr));
718 return segment_base(tr);
719 }
720
721 #ifdef CONFIG_X86_64
722 static inline unsigned long read_msr(unsigned long msr)
723 {
724 u64 value;
725
726 rdmsrl(msr, value);
727 return value;
728 }
729 #endif
730
731 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
732 {
733 asm("fxsave (%0)":: "r" (image));
734 }
735
736 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
737 {
738 asm("fxrstor (%0)":: "r" (image));
739 }
740
741 static inline void kvm_fx_finit(void)
742 {
743 asm("finit");
744 }
745
746 static inline u32 get_rdx_init_val(void)
747 {
748 return 0x600; /* P6 family */
749 }
750
751 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
752 {
753 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
754 }
755
756 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
757
758 #define TSS_IOPB_BASE_OFFSET 0x66
759 #define TSS_BASE_SIZE 0x68
760 #define TSS_IOPB_SIZE (65536 / 8)
761 #define TSS_REDIRECTION_SIZE (256 / 8)
762 #define RMODE_TSS_SIZE \
763 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
764
765 enum {
766 TASK_SWITCH_CALL = 0,
767 TASK_SWITCH_IRET = 1,
768 TASK_SWITCH_JMP = 2,
769 TASK_SWITCH_GATE = 3,
770 };
771
772 #define HF_GIF_MASK (1 << 0)
773 #define HF_HIF_MASK (1 << 1)
774 #define HF_VINTR_MASK (1 << 2)
775 #define HF_NMI_MASK (1 << 3)
776 #define HF_IRET_MASK (1 << 4)
777
778 /*
779 * Hardware virtualization extension instructions may fault if a
780 * reboot turns off virtualization while processes are running.
781 * Trap the fault and ignore the instruction if that happens.
782 */
783 asmlinkage void kvm_handle_fault_on_reboot(void);
784
785 #define __kvm_handle_fault_on_reboot(insn) \
786 "666: " insn "\n\t" \
787 ".pushsection .fixup, \"ax\" \n" \
788 "667: \n\t" \
789 __ASM_SIZE(push) " $666b \n\t" \
790 "jmp kvm_handle_fault_on_reboot \n\t" \
791 ".popsection \n\t" \
792 ".pushsection __ex_table, \"a\" \n\t" \
793 _ASM_PTR " 666b, 667b \n\t" \
794 ".popsection"
795
796 #define KVM_ARCH_WANT_MMU_NOTIFIER
797 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
798 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
799 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
800
801 #endif /* _ASM_X86_KVM_HOST_H */
802
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