Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
kvm_host.h
Go to the documentation of this file.
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 #include <linux/tracepoint.h>
18 #include <linux/cpumask.h>
19 #include <linux/irq_work.h>
20 
21 #include <linux/kvm.h>
22 #include <linux/kvm_para.h>
23 #include <linux/kvm_types.h>
24 #include <linux/perf_event.h>
25 
26 #include <asm/pvclock-abi.h>
27 #include <asm/desc.h>
28 #include <asm/mtrr.h>
29 #include <asm/msr-index.h>
30 #include <asm/asm.h>
31 
32 #define KVM_MAX_VCPUS 254
33 #define KVM_SOFT_MAX_VCPUS 160
34 #define KVM_MEMORY_SLOTS 32
35 /* memory slots that does not exposed to userspace */
36 #define KVM_PRIVATE_MEM_SLOTS 4
37 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
38 
39 #define KVM_MMIO_SIZE 16
40 
41 #define KVM_PIO_PAGE_OFFSET 1
42 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
43 
44 #define CR0_RESERVED_BITS \
45  (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
46  | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
47  | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
48 
49 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
50 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
51 #define CR3_PCID_ENABLED_RESERVED_BITS 0xFFFFFF0000000000ULL
52 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
53  0xFFFFFF0000000000ULL)
54 #define CR4_RESERVED_BITS \
55  (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
56  | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
57  | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \
58  | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \
59  | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
60 
61 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
62 
63 
64 
65 #define INVALID_PAGE (~(hpa_t)0)
66 #define VALID_PAGE(x) ((x) != INVALID_PAGE)
67 
68 #define UNMAPPED_GVA (~(gpa_t)0)
69 
70 /* KVM Hugepage definitions for x86 */
71 #define KVM_NR_PAGE_SIZES 3
72 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9)
73 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
74 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
75 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
76 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
77 
78 #define SELECTOR_TI_MASK (1 << 2)
79 #define SELECTOR_RPL_MASK 0x03
80 
81 #define IOPL_SHIFT 12
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 80
90 #define KVM_NR_FIXED_MTRR_REGION 88
91 #define KVM_NR_VAR_MTRR 8
92 
93 #define ASYNC_PF_PER_VCPU 64
94 
95 extern raw_spinlock_t kvm_lock;
96 extern struct list_head vm_list;
97 
98 struct kvm_vcpu;
99 struct kvm;
100 struct kvm_async_pf;
101 
102 enum kvm_reg {
103  VCPU_REGS_RAX = 0,
104  VCPU_REGS_RCX = 1,
105  VCPU_REGS_RDX = 2,
106  VCPU_REGS_RBX = 3,
107  VCPU_REGS_RSP = 4,
108  VCPU_REGS_RBP = 5,
109  VCPU_REGS_RSI = 6,
110  VCPU_REGS_RDI = 7,
111 #ifdef CONFIG_X86_64
112  VCPU_REGS_R8 = 8,
113  VCPU_REGS_R9 = 9,
114  VCPU_REGS_R10 = 10,
115  VCPU_REGS_R11 = 11,
116  VCPU_REGS_R12 = 12,
117  VCPU_REGS_R13 = 13,
118  VCPU_REGS_R14 = 14,
119  VCPU_REGS_R15 = 15,
120 #endif
121  VCPU_REGS_RIP,
122  NR_VCPU_REGS
123 };
124 
125 enum kvm_reg_ex {
126  VCPU_EXREG_PDPTR = NR_VCPU_REGS,
127  VCPU_EXREG_CR3,
128  VCPU_EXREG_RFLAGS,
129  VCPU_EXREG_CPL,
130  VCPU_EXREG_SEGMENTS,
131 };
132 
133 enum {
134  VCPU_SREG_ES,
135  VCPU_SREG_CS,
136  VCPU_SREG_SS,
137  VCPU_SREG_DS,
138  VCPU_SREG_FS,
139  VCPU_SREG_GS,
140  VCPU_SREG_TR,
141  VCPU_SREG_LDTR,
142 };
143 
144 #include <asm/kvm_emulate.h>
145 
146 #define KVM_NR_MEM_OBJS 40
147 
148 #define KVM_NR_DB_REGS 4
149 
150 #define DR6_BD (1 << 13)
151 #define DR6_BS (1 << 14)
152 #define DR6_FIXED_1 0xffff0ff0
153 #define DR6_VOLATILE 0x0000e00f
154 
155 #define DR7_BP_EN_MASK 0x000000ff
156 #define DR7_GE (1 << 9)
157 #define DR7_GD (1 << 13)
158 #define DR7_FIXED_1 0x00000400
159 #define DR7_VOLATILE 0xffff23ff
160 
161 /* apic attention bits */
162 #define KVM_APIC_CHECK_VAPIC 0
163 /*
164  * The following bit is set with PV-EOI, unset on EOI.
165  * We detect PV-EOI changes by guest by comparing
166  * this bit with PV-EOI in guest memory.
167  * See the implementation in apic_update_pv_eoi.
168  */
169 #define KVM_APIC_PV_EOI_PENDING 1
170 
171 /*
172  * We don't want allocation failures within the mmu code, so we preallocate
173  * enough memory for a single page fault in a cache.
174  */
175 struct kvm_mmu_memory_cache {
176  int nobjs;
177  void *objects[KVM_NR_MEM_OBJS];
178 };
179 
180 /*
181  * kvm_mmu_page_role, below, is defined as:
182  *
183  * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
184  * bits 4:7 - page table level for this shadow (1-4)
185  * bits 8:9 - page table quadrant for 2-level guests
186  * bit 16 - direct mapping of virtual to physical mapping at gfn
187  * used for real mode and two-dimensional paging
188  * bits 17:19 - common access permissions for all ptes in this shadow page
189  */
190 union kvm_mmu_page_role {
191  unsigned word;
192  struct {
193  unsigned level:4;
194  unsigned cr4_pae:1;
195  unsigned quadrant:2;
196  unsigned pad_for_nice_hex_output:6;
197  unsigned direct:1;
198  unsigned access:3;
199  unsigned invalid:1;
200  unsigned nxe:1;
201  unsigned cr0_wp:1;
202  unsigned smep_andnot_wp:1;
203  };
204 };
205 
206 struct kvm_mmu_page {
207  struct list_head link;
208  struct hlist_node hash_link;
209 
210  /*
211  * The following two entries are used to key the shadow page in the
212  * hash table.
213  */
214  gfn_t gfn;
215  union kvm_mmu_page_role role;
216 
217  u64 *spt;
218  /* hold the gfn of each spte inside spt */
219  gfn_t *gfns;
220  /*
221  * One bit set per slot which has memory
222  * in this shadow page.
223  */
224  DECLARE_BITMAP(slot_bitmap, KVM_MEM_SLOTS_NUM);
225  bool unsync;
226  int root_count; /* Currently serving as active root */
227  unsigned int unsync_children;
228  unsigned long parent_ptes; /* Reverse mapping for parent_pte */
229  DECLARE_BITMAP(unsync_child_bitmap, 512);
230 
231 #ifdef CONFIG_X86_32
232  int clear_spte_count;
233 #endif
234 
235  int write_flooding_count;
236 };
237 
238 struct kvm_pio_request {
239  unsigned long count;
240  int in;
241  int port;
242  int size;
243 };
244 
245 /*
246  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
247  * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
248  * mode.
249  */
250 struct kvm_mmu {
251  void (*new_cr3)(struct kvm_vcpu *vcpu);
252  void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
253  unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
254  u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
255  int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
256  bool prefault);
257  void (*inject_page_fault)(struct kvm_vcpu *vcpu,
258  struct x86_exception *fault);
259  void (*free)(struct kvm_vcpu *vcpu);
260  gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
261  struct x86_exception *exception);
262  gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
263  int (*sync_page)(struct kvm_vcpu *vcpu,
264  struct kvm_mmu_page *sp);
265  void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
266  void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
267  u64 *spte, const void *pte);
268  hpa_t root_hpa;
269  int root_level;
270  int shadow_root_level;
271  union kvm_mmu_page_role base_role;
272  bool direct_map;
273 
274  /*
275  * Bitmap; bit set = permission fault
276  * Byte index: page fault error code [4:1]
277  * Bit index: pte permissions in ACC_* format
278  */
279  u8 permissions[16];
280 
281  u64 *pae_root;
282  u64 *lm_root;
283  u64 rsvd_bits_mask[2][4];
284 
285  /*
286  * Bitmap: bit set = last pte in walk
287  * index[0:1]: level (zero-based)
288  * index[2]: pte.ps
289  */
290  u8 last_pte_bitmap;
291 
292  bool nx;
293 
294  u64 pdptrs[4]; /* pae */
295 };
296 
297 enum pmc_type {
298  KVM_PMC_GP = 0,
299  KVM_PMC_FIXED,
300 };
301 
302 struct kvm_pmc {
303  enum pmc_type type;
304  u8 idx;
305  u64 counter;
306  u64 eventsel;
307  struct perf_event *perf_event;
308  struct kvm_vcpu *vcpu;
309 };
310 
311 struct kvm_pmu {
312  unsigned nr_arch_gp_counters;
313  unsigned nr_arch_fixed_counters;
314  unsigned available_event_types;
315  u64 fixed_ctr_ctrl;
316  u64 global_ctrl;
317  u64 global_status;
318  u64 global_ovf_ctrl;
319  u64 counter_bitmask[2];
320  u64 global_ctrl_mask;
321  u8 version;
322  struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC];
323  struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED];
324  struct irq_work irq_work;
325  u64 reprogram_pmi;
326 };
327 
328 struct kvm_vcpu_arch {
329  /*
330  * rip and regs accesses must go through
331  * kvm_{register,rip}_{read,write} functions.
332  */
333  unsigned long regs[NR_VCPU_REGS];
334  u32 regs_avail;
335  u32 regs_dirty;
336 
337  unsigned long cr0;
338  unsigned long cr0_guest_owned_bits;
339  unsigned long cr2;
340  unsigned long cr3;
341  unsigned long cr4;
342  unsigned long cr4_guest_owned_bits;
343  unsigned long cr8;
344  u32 hflags;
345  u64 efer;
346  u64 apic_base;
347  struct kvm_lapic *apic; /* kernel irqchip context */
348  unsigned long apic_attention;
349  int32_t apic_arb_prio;
350  int mp_state;
351  int sipi_vector;
352  u64 ia32_misc_enable_msr;
353  bool tpr_access_reporting;
354 
355  /*
356  * Paging state of the vcpu
357  *
358  * If the vcpu runs in guest mode with two level paging this still saves
359  * the paging mode of the l1 guest. This context is always used to
360  * handle faults.
361  */
362  struct kvm_mmu mmu;
363 
364  /*
365  * Paging state of an L2 guest (used for nested npt)
366  *
367  * This context will save all necessary information to walk page tables
368  * of the an L2 guest. This context is only initialized for page table
369  * walking and not for faulting since we never handle l2 page faults on
370  * the host.
371  */
372  struct kvm_mmu nested_mmu;
373 
374  /*
375  * Pointer to the mmu context currently used for
376  * gva_to_gpa translations.
377  */
378  struct kvm_mmu *walk_mmu;
379 
380  struct kvm_mmu_memory_cache mmu_pte_list_desc_cache;
381  struct kvm_mmu_memory_cache mmu_page_cache;
382  struct kvm_mmu_memory_cache mmu_page_header_cache;
383 
384  struct fpu guest_fpu;
385  u64 xcr0;
386 
387  struct kvm_pio_request pio;
388  void *pio_data;
389 
390  u8 event_exit_inst_len;
391 
392  struct kvm_queued_exception {
393  bool pending;
394  bool has_error_code;
395  bool reinject;
396  u8 nr;
397  u32 error_code;
398  } exception;
399 
400  struct kvm_queued_interrupt {
401  bool pending;
402  bool soft;
403  u8 nr;
404  } interrupt;
405 
406  int halt_request; /* real mode on Intel only */
407 
408  int cpuid_nent;
409  struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
410  /* emulate context */
411 
412  struct x86_emulate_ctxt emulate_ctxt;
413  bool emulate_regs_need_sync_to_vcpu;
414  bool emulate_regs_need_sync_from_vcpu;
415  int (*complete_userspace_io)(struct kvm_vcpu *vcpu);
416 
417  gpa_t time;
418  struct pvclock_vcpu_time_info hv_clock;
419  unsigned int hw_tsc_khz;
420  unsigned int time_offset;
421  struct page *time_page;
422  /* set guest stopped flag in pvclock flags field */
423  bool pvclock_set_guest_stopped_request;
424 
425  struct {
426  u64 msr_val;
427  u64 last_steal;
428  u64 accum_steal;
429  struct gfn_to_hva_cache stime;
430  struct kvm_steal_time steal;
431  } st;
432 
433  u64 last_guest_tsc;
434  u64 last_kernel_ns;
435  u64 last_host_tsc;
436  u64 tsc_offset_adjustment;
437  u64 this_tsc_nsec;
438  u64 this_tsc_write;
439  u8 this_tsc_generation;
440  bool tsc_catchup;
441  bool tsc_always_catchup;
442  s8 virtual_tsc_shift;
443  u32 virtual_tsc_mult;
444  u32 virtual_tsc_khz;
445 
446  atomic_t nmi_queued; /* unprocessed asynchronous NMIs */
447  unsigned nmi_pending; /* NMI queued after currently running handler */
448  bool nmi_injected; /* Trying to inject an NMI this entry */
449 
450  struct mtrr_state_type mtrr_state;
451  u32 pat;
452 
453  int switch_db_regs;
454  unsigned long db[KVM_NR_DB_REGS];
455  unsigned long dr6;
456  unsigned long dr7;
457  unsigned long eff_db[KVM_NR_DB_REGS];
458  unsigned long guest_debug_dr7;
459 
460  u64 mcg_cap;
461  u64 mcg_status;
462  u64 mcg_ctl;
463  u64 *mce_banks;
464 
465  /* Cache MMIO info */
466  u64 mmio_gva;
467  unsigned access;
468  gfn_t mmio_gfn;
469 
470  struct kvm_pmu pmu;
471 
472  /* used for guest single stepping over the given code position */
473  unsigned long singlestep_rip;
474 
475  /* fields used by HYPER-V emulation */
476  u64 hv_vapic;
477 
478  cpumask_var_t wbinvd_dirty_mask;
479 
480  unsigned long last_retry_eip;
481  unsigned long last_retry_addr;
482 
483  struct {
484  bool halted;
485  gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
486  struct gfn_to_hva_cache data;
487  u64 msr_val;
488  u32 id;
489  bool send_user_only;
490  } apf;
491 
492  /* OSVW MSRs (AMD only) */
493  struct {
494  u64 length;
495  u64 status;
496  } osvw;
497 
498  struct {
499  u64 msr_val;
500  struct gfn_to_hva_cache data;
501  } pv_eoi;
502 };
503 
504 struct kvm_lpage_info {
505  int write_count;
506 };
507 
508 struct kvm_arch_memory_slot {
509  unsigned long *rmap[KVM_NR_PAGE_SIZES];
510  struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
511 };
512 
513 struct kvm_apic_map {
514  struct rcu_head rcu;
515  u8 ldr_bits;
516  /* fields bellow are used to decode ldr values in different modes */
517  u32 cid_shift, cid_mask, lid_mask;
518  struct kvm_lapic *phys_map[256];
519  /* first index is cluster id second is cpu id in a cluster */
520  struct kvm_lapic *logical_map[16][16];
521 };
522 
523 struct kvm_arch {
524  unsigned int n_used_mmu_pages;
525  unsigned int n_requested_mmu_pages;
526  unsigned int n_max_mmu_pages;
527  unsigned int indirect_shadow_pages;
528  struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
529  /*
530  * Hash table of struct kvm_mmu_page.
531  */
532  struct list_head active_mmu_pages;
533  struct list_head assigned_dev_head;
534  struct iommu_domain *iommu_domain;
535  int iommu_flags;
536  struct kvm_pic *vpic;
537  struct kvm_ioapic *vioapic;
538  struct kvm_pit *vpit;
539  int vapics_in_nmi_mode;
540  struct mutex apic_map_lock;
541  struct kvm_apic_map *apic_map;
542 
543  unsigned int tss_addr;
544  struct page *apic_access_page;
545 
546  gpa_t wall_clock;
547 
548  struct page *ept_identity_pagetable;
549  bool ept_identity_pagetable_done;
550  gpa_t ept_identity_map_addr;
551 
552  unsigned long irq_sources_bitmap;
553  s64 kvmclock_offset;
554  raw_spinlock_t tsc_write_lock;
555  u64 last_tsc_nsec;
556  u64 last_tsc_write;
557  u32 last_tsc_khz;
558  u64 cur_tsc_nsec;
559  u64 cur_tsc_write;
560  u64 cur_tsc_offset;
561  u8 cur_tsc_generation;
562 
563  struct kvm_xen_hvm_config xen_hvm_config;
564 
565  /* fields used by HYPER-V emulation */
566  u64 hv_guest_os_id;
567  u64 hv_hypercall;
568 
569  #ifdef CONFIG_KVM_MMU_AUDIT
570  int audit_point;
571  #endif
572 };
573 
574 struct kvm_vm_stat {
575  u32 mmu_shadow_zapped;
576  u32 mmu_pte_write;
577  u32 mmu_pte_updated;
578  u32 mmu_pde_zapped;
579  u32 mmu_flooded;
580  u32 mmu_recycled;
581  u32 mmu_cache_miss;
582  u32 mmu_unsync;
583  u32 remote_tlb_flush;
584  u32 lpages;
585 };
586 
587 struct kvm_vcpu_stat {
588  u32 pf_fixed;
589  u32 pf_guest;
590  u32 tlb_flush;
591  u32 invlpg;
592 
593  u32 exits;
594  u32 io_exits;
595  u32 mmio_exits;
596  u32 signal_exits;
597  u32 irq_window_exits;
598  u32 nmi_window_exits;
599  u32 halt_exits;
600  u32 halt_wakeup;
601  u32 request_irq_exits;
602  u32 irq_exits;
603  u32 host_state_reload;
604  u32 efer_reload;
605  u32 fpu_reload;
606  u32 insn_emulation;
607  u32 insn_emulation_fail;
608  u32 hypercalls;
609  u32 irq_injections;
610  u32 nmi_injections;
611 };
612 
613 struct x86_instruction_info;
614 
615 struct kvm_x86_ops {
616  int (*cpu_has_kvm_support)(void); /* __init */
617  int (*disabled_by_bios)(void); /* __init */
618  int (*hardware_enable)(void *dummy);
619  void (*hardware_disable)(void *dummy);
620  void (*check_processor_compatibility)(void *rtn);
621  int (*hardware_setup)(void); /* __init */
622  void (*hardware_unsetup)(void); /* __exit */
623  bool (*cpu_has_accelerated_tpr)(void);
624  void (*cpuid_update)(struct kvm_vcpu *vcpu);
625 
626  /* Create, but do not attach this VCPU */
627  struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
628  void (*vcpu_free)(struct kvm_vcpu *vcpu);
629  int (*vcpu_reset)(struct kvm_vcpu *vcpu);
630 
631  void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
632  void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
633  void (*vcpu_put)(struct kvm_vcpu *vcpu);
634 
635  void (*update_db_bp_intercept)(struct kvm_vcpu *vcpu);
636  int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
637  int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
638  u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
639  void (*get_segment)(struct kvm_vcpu *vcpu,
640  struct kvm_segment *var, int seg);
641  int (*get_cpl)(struct kvm_vcpu *vcpu);
642  void (*set_segment)(struct kvm_vcpu *vcpu,
643  struct kvm_segment *var, int seg);
644  void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
645  void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
646  void (*decache_cr3)(struct kvm_vcpu *vcpu);
647  void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
648  void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
649  void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
650  int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
651  void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
652  void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
653  void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
654  void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
655  void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
656  void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
657  void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
658  unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
659  void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
660  void (*fpu_activate)(struct kvm_vcpu *vcpu);
661  void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
662 
663  void (*tlb_flush)(struct kvm_vcpu *vcpu);
664 
665  void (*run)(struct kvm_vcpu *vcpu);
666  int (*handle_exit)(struct kvm_vcpu *vcpu);
667  void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
668  void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
669  u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
670  void (*patch_hypercall)(struct kvm_vcpu *vcpu,
671  unsigned char *hypercall_addr);
672  void (*set_irq)(struct kvm_vcpu *vcpu);
673  void (*set_nmi)(struct kvm_vcpu *vcpu);
674  void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
675  bool has_error_code, u32 error_code,
676  bool reinject);
677  void (*cancel_injection)(struct kvm_vcpu *vcpu);
678  int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
679  int (*nmi_allowed)(struct kvm_vcpu *vcpu);
680  bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
681  void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
682  void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
683  void (*enable_irq_window)(struct kvm_vcpu *vcpu);
684  void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
685  int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
686  int (*get_tdp_level)(void);
687  u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
688  int (*get_lpage_level)(void);
689  bool (*rdtscp_supported)(void);
690  bool (*invpcid_supported)(void);
691  void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host);
692 
693  void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
694 
695  void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
696 
697  bool (*has_wbinvd_exit)(void);
698 
699  void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale);
700  void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
701 
702  u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc);
703  u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu);
704 
705  void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2);
706 
707  int (*check_intercept)(struct kvm_vcpu *vcpu,
708  struct x86_instruction_info *info,
709  enum x86_intercept_stage stage);
710 };
711 
712 struct kvm_arch_async_pf {
713  u32 token;
714  gfn_t gfn;
715  unsigned long cr3;
716  bool direct_map;
717 };
718 
719 extern struct kvm_x86_ops *kvm_x86_ops;
720 
721 static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu,
722  s64 adjustment)
723 {
724  kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false);
725 }
726 
727 static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment)
728 {
729  kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true);
730 }
731 
732 int kvm_mmu_module_init(void);
733 void kvm_mmu_module_exit(void);
734 
735 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
736 int kvm_mmu_create(struct kvm_vcpu *vcpu);
737 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
738 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
739  u64 dirty_mask, u64 nx_mask, u64 x_mask);
740 
741 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
742 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
743 void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
744  struct kvm_memory_slot *slot,
745  gfn_t gfn_offset, unsigned long mask);
746 void kvm_mmu_zap_all(struct kvm *kvm);
747 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
748 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
749 
750 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
751 
752 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
753  const void *val, int bytes);
754 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
755 
756 extern bool tdp_enabled;
757 
758 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu);
759 
760 /* control of guest tsc rate supported? */
761 extern bool kvm_has_tsc_control;
762 /* minimum supported tsc_khz for guests */
763 extern u32 kvm_min_guest_tsc_khz;
764 /* maximum supported tsc_khz for guests */
765 extern u32 kvm_max_guest_tsc_khz;
766 
767 enum emulation_result {
768  EMULATE_DONE, /* no further processing */
769  EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
770  EMULATE_FAIL, /* can't emulate this instruction */
771 };
772 
773 #define EMULTYPE_NO_DECODE (1 << 0)
774 #define EMULTYPE_TRAP_UD (1 << 1)
775 #define EMULTYPE_SKIP (1 << 2)
776 #define EMULTYPE_RETRY (1 << 3)
777 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
778  int emulation_type, void *insn, int insn_len);
779 
780 static inline int emulate_instruction(struct kvm_vcpu *vcpu,
781  int emulation_type)
782 {
783  return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0);
784 }
785 
786 void kvm_enable_efer_bits(u64);
787 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
788 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
789 
790 struct x86_emulate_ctxt;
791 
792 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
793 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
794 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
795 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
796 
797 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
798 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
799 
800 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
801  int reason, bool has_error_code, u32 error_code);
802 
803 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
804 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
805 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
806 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
807 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
808 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
809 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
810 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
811 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
812 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
813 
814 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
815 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
816 
817 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
818 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
819 bool kvm_rdpmc(struct kvm_vcpu *vcpu);
820 
821 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
822 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
823 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
824 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
825 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
826 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
827  gfn_t gfn, void *data, int offset, int len,
828  u32 access);
829 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
830 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
831 
832 static inline int __kvm_irq_line_state(unsigned long *irq_state,
833  int irq_source_id, int level)
834 {
835  /* Logical OR for level trig interrupt */
836  if (level)
837  __set_bit(irq_source_id, irq_state);
838  else
839  __clear_bit(irq_source_id, irq_state);
840 
841  return !!(*irq_state);
842 }
843 
844 int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level);
845 void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id);
846 
847 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
848 
849 int fx_init(struct kvm_vcpu *vcpu);
850 
851 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
852 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
853  const u8 *new, int bytes);
854 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn);
855 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
856 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
857 int kvm_mmu_load(struct kvm_vcpu *vcpu);
858 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
859 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
860 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
861 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
862  struct x86_exception *exception);
863 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
864  struct x86_exception *exception);
865 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
866  struct x86_exception *exception);
867 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
868  struct x86_exception *exception);
869 
870 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
871 
872 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
873  void *insn, int insn_len);
874 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
875 
876 void kvm_enable_tdp(void);
877 void kvm_disable_tdp(void);
878 
879 int complete_pio(struct kvm_vcpu *vcpu);
880 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
881 
882 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
883 {
884  return gpa;
885 }
886 
887 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
888 {
889  struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
890 
891  return (struct kvm_mmu_page *)page_private(page);
892 }
893 
894 static inline u16 kvm_read_ldt(void)
895 {
896  u16 ldt;
897  asm("sldt %0" : "=g"(ldt));
898  return ldt;
899 }
900 
901 static inline void kvm_load_ldt(u16 sel)
902 {
903  asm("lldt %0" : : "rm"(sel));
904 }
905 
906 #ifdef CONFIG_X86_64
907 static inline unsigned long read_msr(unsigned long msr)
908 {
909  u64 value;
910 
911  rdmsrl(msr, value);
912  return value;
913 }
914 #endif
915 
916 static inline u32 get_rdx_init_val(void)
917 {
918  return 0x600; /* P6 family */
919 }
920 
921 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
922 {
923  kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
924 }
925 
926 #define TSS_IOPB_BASE_OFFSET 0x66
927 #define TSS_BASE_SIZE 0x68
928 #define TSS_IOPB_SIZE (65536 / 8)
929 #define TSS_REDIRECTION_SIZE (256 / 8)
930 #define RMODE_TSS_SIZE \
931  (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
932 
933 enum {
934  TASK_SWITCH_CALL = 0,
935  TASK_SWITCH_IRET = 1,
936  TASK_SWITCH_JMP = 2,
937  TASK_SWITCH_GATE = 3,
938 };
939 
940 #define HF_GIF_MASK (1 << 0)
941 #define HF_HIF_MASK (1 << 1)
942 #define HF_VINTR_MASK (1 << 2)
943 #define HF_NMI_MASK (1 << 3)
944 #define HF_IRET_MASK (1 << 4)
945 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */
946 
947 /*
948  * Hardware virtualization extension instructions may fault if a
949  * reboot turns off virtualization while processes are running.
950  * Trap the fault and ignore the instruction if that happens.
951  */
952 asmlinkage void kvm_spurious_fault(void);
953 extern bool kvm_rebooting;
954 
955 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \
956  "666: " insn "\n\t" \
957  "668: \n\t" \
958  ".pushsection .fixup, \"ax\" \n" \
959  "667: \n\t" \
960  cleanup_insn "\n\t" \
961  "cmpb $0, kvm_rebooting \n\t" \
962  "jne 668b \n\t" \
963  __ASM_SIZE(push) " $666b \n\t" \
964  "call kvm_spurious_fault \n\t" \
965  ".popsection \n\t" \
966  _ASM_EXTABLE(666b, 667b)
967 
968 #define __kvm_handle_fault_on_reboot(insn) \
969  ____kvm_handle_fault_on_reboot(insn, "")
970 
971 #define KVM_ARCH_WANT_MMU_NOTIFIER
972 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
973 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end);
974 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
975 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
976 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
977 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
978 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
979 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
980 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
981 
982 void kvm_define_shared_msr(unsigned index, u32 msr);
983 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
984 
985 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
986 
987 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
988  struct kvm_async_pf *work);
989 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
990  struct kvm_async_pf *work);
991 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
992  struct kvm_async_pf *work);
993 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
994 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
995 
996 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
997 
998 int kvm_is_in_guest(void);
999 
1000 void kvm_pmu_init(struct kvm_vcpu *vcpu);
1001 void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
1002 void kvm_pmu_reset(struct kvm_vcpu *vcpu);
1003 void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu);
1004 bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr);
1005 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
1006 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
1007 int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
1008 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu);
1009 void kvm_deliver_pmi(struct kvm_vcpu *vcpu);
1010 
1011 #endif /* _ASM_X86_KVM_HOST_H */
Generated on Thu Jan 10 2013 13:06:14 for Linux Kernel by   doxygen 1.8.2