tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/list.h>
11#include <linux/mutex.h>
12#include <linux/spinlock.h>
13#include <linux/signal.h>
14#include <linux/sched.h>
15#include <linux/mm.h>
16#include <linux/preempt.h>
17#include <asm/signal.h>
18
19#include <linux/kvm.h>
20#include <linux/kvm_para.h>
21
22#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
23#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
24#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
25
26#define KVM_GUEST_CR0_MASK \
27 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
28 | X86_CR0_NW | X86_CR0_CD)
29#define KVM_VM_CR0_ALWAYS_ON \
30 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
31 | X86_CR0_MP)
32#define KVM_GUEST_CR4_MASK \
33 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
34#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
35#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
36
37#define INVALID_PAGE (~(hpa_t)0)
38#define UNMAPPED_GVA (~(gpa_t)0)
39
40#define KVM_MAX_VCPUS 4
41#define KVM_ALIAS_SLOTS 4
42#define KVM_MEMORY_SLOTS 8
43#define KVM_NUM_MMU_PAGES 1024
44#define KVM_MIN_FREE_MMU_PAGES 5
45#define KVM_REFILL_PAGES 25
46#define KVM_MAX_CPUID_ENTRIES 40
47
48#define DE_VECTOR 0
49#define NM_VECTOR 7
50#define DF_VECTOR 8
51#define TS_VECTOR 10
52#define NP_VECTOR 11
53#define SS_VECTOR 12
54#define GP_VECTOR 13
55#define PF_VECTOR 14
56
57#define SELECTOR_TI_MASK (1 << 2)
58#define SELECTOR_RPL_MASK 0x03
59
60#define IOPL_SHIFT 12
61
62#define KVM_PIO_PAGE_OFFSET 1
63
64/*
65 * vcpu->requests bit members
66 */
67#define KVM_TLB_FLUSH 0
68
69/*
70 * Address types:
71 *
72 * gva - guest virtual address
73 * gpa - guest physical address
74 * gfn - guest frame number
75 * hva - host virtual address
76 * hpa - host physical address
77 * hfn - host frame number
78 */
79
80typedef unsigned long gva_t;
81typedef u64 gpa_t;
82typedef unsigned long gfn_t;
83
84typedef unsigned long hva_t;
85typedef u64 hpa_t;
86typedef unsigned long hfn_t;
87
88#define NR_PTE_CHAIN_ENTRIES 5
89
90struct kvm_pte_chain {
91 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
92 struct hlist_node link;
93};
94
95/*
96 * kvm_mmu_page_role, below, is defined as:
97 *
98 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
99 * bits 4:7 - page table level for this shadow (1-4)
100 * bits 8:9 - page table quadrant for 2-level guests
101 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
102 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
103 */
104union kvm_mmu_page_role {
105 unsigned word;
106 struct {
107 unsigned glevels : 4;
108 unsigned level : 4;
109 unsigned quadrant : 2;
110 unsigned pad_for_nice_hex_output : 6;
111 unsigned metaphysical : 1;
112 unsigned hugepage_access : 3;
113 };
114};
115
116struct kvm_mmu_page {
117 struct list_head link;
118 struct hlist_node hash_link;
119
120 /*
121 * The following two entries are used to key the shadow page in the
122 * hash table.
123 */
124 gfn_t gfn;
125 union kvm_mmu_page_role role;
126
127 u64 *spt;
128 unsigned long slot_bitmap; /* One bit set per slot which has memory
129 * in this shadow page.
130 */
131 int multimapped; /* More than one parent_pte? */
132 int root_count; /* Currently serving as active root */
133 union {
134 u64 *parent_pte; /* !multimapped */
135 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
136 };
137};
138
139struct kvm_vcpu;
140extern struct kmem_cache *kvm_vcpu_cache;
141
142/*
143 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
144 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
145 * mode.
146 */
147struct kvm_mmu {
148 void (*new_cr3)(struct kvm_vcpu *vcpu);
149 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
150 void (*free)(struct kvm_vcpu *vcpu);
151 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
152 hpa_t root_hpa;
153 int root_level;
154 int shadow_root_level;
155
156 u64 *pae_root;
157};
158
159#define KVM_NR_MEM_OBJS 20
160
161struct kvm_mmu_memory_cache {
162 int nobjs;
163 void *objects[KVM_NR_MEM_OBJS];
164};
165
166/*
167 * We don't want allocation failures within the mmu code, so we preallocate
168 * enough memory for a single page fault in a cache.
169 */
170struct kvm_guest_debug {
171 int enabled;
172 unsigned long bp[4];
173 int singlestep;
174};
175
176enum {
177 VCPU_REGS_RAX = 0,
178 VCPU_REGS_RCX = 1,
179 VCPU_REGS_RDX = 2,
180 VCPU_REGS_RBX = 3,
181 VCPU_REGS_RSP = 4,
182 VCPU_REGS_RBP = 5,
183 VCPU_REGS_RSI = 6,
184 VCPU_REGS_RDI = 7,
185#ifdef CONFIG_X86_64
186 VCPU_REGS_R8 = 8,
187 VCPU_REGS_R9 = 9,
188 VCPU_REGS_R10 = 10,
189 VCPU_REGS_R11 = 11,
190 VCPU_REGS_R12 = 12,
191 VCPU_REGS_R13 = 13,
192 VCPU_REGS_R14 = 14,
193 VCPU_REGS_R15 = 15,
194#endif
195 NR_VCPU_REGS
196};
197
198enum {
199 VCPU_SREG_CS,
200 VCPU_SREG_DS,
201 VCPU_SREG_ES,
202 VCPU_SREG_FS,
203 VCPU_SREG_GS,
204 VCPU_SREG_SS,
205 VCPU_SREG_TR,
206 VCPU_SREG_LDTR,
207};
208
209struct kvm_pio_request {
210 unsigned long count;
211 int cur_count;
212 struct page *guest_pages[2];
213 unsigned guest_page_offset;
214 int in;
215 int port;
216 int size;
217 int string;
218 int down;
219 int rep;
220};
221
222struct kvm_stat {
223 u32 pf_fixed;
224 u32 pf_guest;
225 u32 tlb_flush;
226 u32 invlpg;
227
228 u32 exits;
229 u32 io_exits;
230 u32 mmio_exits;
231 u32 signal_exits;
232 u32 irq_window_exits;
233 u32 halt_exits;
234 u32 halt_wakeup;
235 u32 request_irq_exits;
236 u32 irq_exits;
237 u32 light_exits;
238 u32 efer_reload;
239};
240
241struct kvm_io_device {
242 void (*read)(struct kvm_io_device *this,
243 gpa_t addr,
244 int len,
245 void *val);
246 void (*write)(struct kvm_io_device *this,
247 gpa_t addr,
248 int len,
249 const void *val);
250 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
251 void (*destructor)(struct kvm_io_device *this);
252
253 void *private;
254};
255
256static inline void kvm_iodevice_read(struct kvm_io_device *dev,
257 gpa_t addr,
258 int len,
259 void *val)
260{
261 dev->read(dev, addr, len, val);
262}
263
264static inline void kvm_iodevice_write(struct kvm_io_device *dev,
265 gpa_t addr,
266 int len,
267 const void *val)
268{
269 dev->write(dev, addr, len, val);
270}
271
272static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
273{
274 return dev->in_range(dev, addr);
275}
276
277static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
278{
279 if (dev->destructor)
280 dev->destructor(dev);
281}
282
283/*
284 * It would be nice to use something smarter than a linear search, TBD...
285 * Thankfully we dont expect many devices to register (famous last words :),
286 * so until then it will suffice. At least its abstracted so we can change
287 * in one place.
288 */
289struct kvm_io_bus {
290 int dev_count;
291#define NR_IOBUS_DEVS 6
292 struct kvm_io_device *devs[NR_IOBUS_DEVS];
293};
294
295void kvm_io_bus_init(struct kvm_io_bus *bus);
296void kvm_io_bus_destroy(struct kvm_io_bus *bus);
297struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
298void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
299 struct kvm_io_device *dev);
300
301struct kvm_vcpu {
302 struct kvm *kvm;
303 struct preempt_notifier preempt_notifier;
304 int vcpu_id;
305 struct mutex mutex;
306 int cpu;
307 u64 host_tsc;
308 struct kvm_run *run;
309 int interrupt_window_open;
310 int guest_mode;
311 unsigned long requests;
312 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
313 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
314 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
315 unsigned long rip; /* needs vcpu_load_rsp_rip() */
316
317 unsigned long cr0;
318 unsigned long cr2;
319 unsigned long cr3;
320 gpa_t para_state_gpa;
321 struct page *para_state_page;
322 gpa_t hypercall_gpa;
323 unsigned long cr4;
324 unsigned long cr8;
325 u64 pdptrs[4]; /* pae */
326 u64 shadow_efer;
327 u64 apic_base;
328 struct kvm_lapic *apic; /* kernel irqchip context */
329#define VCPU_MP_STATE_RUNNABLE 0
330#define VCPU_MP_STATE_UNINITIALIZED 1
331#define VCPU_MP_STATE_INIT_RECEIVED 2
332#define VCPU_MP_STATE_SIPI_RECEIVED 3
333#define VCPU_MP_STATE_HALTED 4
334 int mp_state;
335 int sipi_vector;
336 u64 ia32_misc_enable_msr;
337
338 struct kvm_mmu mmu;
339
340 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
341 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
342 struct kvm_mmu_memory_cache mmu_page_cache;
343 struct kvm_mmu_memory_cache mmu_page_header_cache;
344
345 gfn_t last_pt_write_gfn;
346 int last_pt_write_count;
347
348 struct kvm_guest_debug guest_debug;
349
350 struct i387_fxsave_struct host_fx_image;
351 struct i387_fxsave_struct guest_fx_image;
352 int fpu_active;
353 int guest_fpu_loaded;
354
355 int mmio_needed;
356 int mmio_read_completed;
357 int mmio_is_write;
358 int mmio_size;
359 unsigned char mmio_data[8];
360 gpa_t mmio_phys_addr;
361 gva_t mmio_fault_cr2;
362 struct kvm_pio_request pio;
363 void *pio_data;
364 wait_queue_head_t wq;
365
366 int sigset_active;
367 sigset_t sigset;
368
369 struct kvm_stat stat;
370
371 struct {
372 int active;
373 u8 save_iopl;
374 struct kvm_save_segment {
375 u16 selector;
376 unsigned long base;
377 u32 limit;
378 u32 ar;
379 } tr, es, ds, fs, gs;
380 } rmode;
381 int halt_request; /* real mode on Intel only */
382
383 int cpuid_nent;
384 struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
385};
386
387struct kvm_mem_alias {
388 gfn_t base_gfn;
389 unsigned long npages;
390 gfn_t target_gfn;
391};
392
393struct kvm_memory_slot {
394 gfn_t base_gfn;
395 unsigned long npages;
396 unsigned long flags;
397 struct page **phys_mem;
398 unsigned long *dirty_bitmap;
399};
400
401struct kvm {
402 struct mutex lock; /* protects everything except vcpus */
403 int naliases;
404 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
405 int nmemslots;
406 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
407 /*
408 * Hash table of struct kvm_mmu_page.
409 */
410 struct list_head active_mmu_pages;
411 int n_free_mmu_pages;
412 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
413 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
414 unsigned long rmap_overflow;
415 struct list_head vm_list;
416 struct file *filp;
417 struct kvm_io_bus mmio_bus;
418 struct kvm_io_bus pio_bus;
419 struct kvm_pic *vpic;
420 struct kvm_ioapic *vioapic;
421 int round_robin_prev_vcpu;
422};
423
424static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
425{
426 return kvm->vpic;
427}
428
429static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
430{
431 return kvm->vioapic;
432}
433
434static inline int irqchip_in_kernel(struct kvm *kvm)
435{
436 return pic_irqchip(kvm) != 0;
437}
438
439struct descriptor_table {
440 u16 limit;
441 unsigned long base;
442} __attribute__((packed));
443
444struct kvm_x86_ops {
445 int (*cpu_has_kvm_support)(void); /* __init */
446 int (*disabled_by_bios)(void); /* __init */
447 void (*hardware_enable)(void *dummy); /* __init */
448 void (*hardware_disable)(void *dummy);
449 void (*check_processor_compatibility)(void *rtn);
450 int (*hardware_setup)(void); /* __init */
451 void (*hardware_unsetup)(void); /* __exit */
452
453 /* Create, but do not attach this VCPU */
454 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
455 void (*vcpu_free)(struct kvm_vcpu *vcpu);
456 void (*vcpu_reset)(struct kvm_vcpu *vcpu);
457
458 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
459 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
460 void (*vcpu_put)(struct kvm_vcpu *vcpu);
461 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
462
463 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
464 struct kvm_debug_guest *dbg);
465 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
466 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
467 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
468 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
469 void (*get_segment)(struct kvm_vcpu *vcpu,
470 struct kvm_segment *var, int seg);
471 void (*set_segment)(struct kvm_vcpu *vcpu,
472 struct kvm_segment *var, int seg);
473 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
474 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
475 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
476 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
477 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
478 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
479 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
480 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
481 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
482 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
483 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
484 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
485 int *exception);
486 void (*cache_regs)(struct kvm_vcpu *vcpu);
487 void (*decache_regs)(struct kvm_vcpu *vcpu);
488 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
489 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
490
491 void (*tlb_flush)(struct kvm_vcpu *vcpu);
492 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
493 unsigned long addr, u32 err_code);
494
495 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
496
497 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
498 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
499 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
500 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
501 unsigned char *hypercall_addr);
502 int (*get_irq)(struct kvm_vcpu *vcpu);
503 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
504 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
505 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
506 struct kvm_run *run);
507};
508
509extern struct kvm_x86_ops *kvm_x86_ops;
510
511/* The guest did something we don't support. */
512#define pr_unimpl(vcpu, fmt, ...) \
513 do { \
514 if (printk_ratelimit()) \
515 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
516 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
517 } while(0)
518
519#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
520#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
521
522int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
523void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
524
525int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
526 struct module *module);
527void kvm_exit_x86(void);
528
529int kvm_mmu_module_init(void);
530void kvm_mmu_module_exit(void);
531
532void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
533int kvm_mmu_create(struct kvm_vcpu *vcpu);
534int kvm_mmu_setup(struct kvm_vcpu *vcpu);
535
536int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
537void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
538void kvm_mmu_zap_all(struct kvm *kvm);
539
540hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
541#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
542#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
543static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
544hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
545struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
546
547extern hpa_t bad_page_address;
548
549struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
550struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
551void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
552
553enum emulation_result {
554 EMULATE_DONE, /* no further processing */
555 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
556 EMULATE_FAIL, /* can't emulate this instruction */
557};
558
559int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
560 unsigned long cr2, u16 error_code);
561void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
562void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
563void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
564void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
565 unsigned long *rflags);
566
567unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
568void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
569 unsigned long *rflags);
570int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
571int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
572
573struct x86_emulate_ctxt;
574
575int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
576 int size, unsigned port);
577int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
578 int size, unsigned long count, int down,
579 gva_t address, int rep, unsigned port);
580void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
581int kvm_emulate_halt(struct kvm_vcpu *vcpu);
582int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
583int emulate_clts(struct kvm_vcpu *vcpu);
584int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
585 unsigned long *dest);
586int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
587 unsigned long value);
588
589void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
590void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
591void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
592void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
593unsigned long get_cr8(struct kvm_vcpu *vcpu);
594void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
595void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
596
597int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
598int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
599
600void fx_init(struct kvm_vcpu *vcpu);
601
602void kvm_resched(struct kvm_vcpu *vcpu);
603void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
604void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
605void kvm_flush_remote_tlbs(struct kvm *kvm);
606
607int emulator_read_std(unsigned long addr,
608 void *val,
609 unsigned int bytes,
610 struct kvm_vcpu *vcpu);
611int emulator_write_emulated(unsigned long addr,
612 const void *val,
613 unsigned int bytes,
614 struct kvm_vcpu *vcpu);
615
616unsigned long segment_base(u16 selector);
617
618void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
619 const u8 *new, int bytes);
620int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
621void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
622int kvm_mmu_load(struct kvm_vcpu *vcpu);
623void kvm_mmu_unload(struct kvm_vcpu *vcpu);
624
625int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
626
627static inline void kvm_guest_enter(void)
628{
629 current->flags |= PF_VCPU;
630}
631
632static inline void kvm_guest_exit(void)
633{
634 current->flags &= ~PF_VCPU;
635}
636
637static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
638 u32 error_code)
639{
640 return vcpu->mmu.page_fault(vcpu, gva, error_code);
641}
642
643static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
644{
645 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
646 __kvm_mmu_free_some_pages(vcpu);
647}
648
649static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
650{
651 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
652 return 0;
653
654 return kvm_mmu_load(vcpu);
655}
656
657static inline int is_long_mode(struct kvm_vcpu *vcpu)
658{
659#ifdef CONFIG_X86_64
660 return vcpu->shadow_efer & EFER_LME;
661#else
662 return 0;
663#endif
664}
665
666static inline int is_pae(struct kvm_vcpu *vcpu)
667{
668 return vcpu->cr4 & X86_CR4_PAE;
669}
670
671static inline int is_pse(struct kvm_vcpu *vcpu)
672{
673 return vcpu->cr4 & X86_CR4_PSE;
674}
675
676static inline int is_paging(struct kvm_vcpu *vcpu)
677{
678 return vcpu->cr0 & X86_CR0_PG;
679}
680
681static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
682{
683 return slot - kvm->memslots;
684}
685
686static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
687{
688 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
689
690 return (struct kvm_mmu_page *)page_private(page);
691}
692
693static inline u16 read_fs(void)
694{
695 u16 seg;
696 asm ("mov %%fs, %0" : "=g"(seg));
697 return seg;
698}
699
700static inline u16 read_gs(void)
701{
702 u16 seg;
703 asm ("mov %%gs, %0" : "=g"(seg));
704 return seg;
705}
706
707static inline u16 read_ldt(void)
708{
709 u16 ldt;
710 asm ("sldt %0" : "=g"(ldt));
711 return ldt;
712}
713
714static inline void load_fs(u16 sel)
715{
716 asm ("mov %0, %%fs" : : "rm"(sel));
717}
718
719static inline void load_gs(u16 sel)
720{
721 asm ("mov %0, %%gs" : : "rm"(sel));
722}
723
724#ifndef load_ldt
725static inline void load_ldt(u16 sel)
726{
727 asm ("lldt %0" : : "rm"(sel));
728}
729#endif
730
731static inline void get_idt(struct descriptor_table *table)
732{
733 asm ("sidt %0" : "=m"(*table));
734}
735
736static inline void get_gdt(struct descriptor_table *table)
737{
738 asm ("sgdt %0" : "=m"(*table));
739}
740
741static inline unsigned long read_tr_base(void)
742{
743 u16 tr;
744 asm ("str %0" : "=g"(tr));
745 return segment_base(tr);
746}
747
748#ifdef CONFIG_X86_64
749static inline unsigned long read_msr(unsigned long msr)
750{
751 u64 value;
752
753 rdmsrl(msr, value);
754 return value;
755}
756#endif
757
758static inline void fx_save(struct i387_fxsave_struct *image)
759{
760 asm ("fxsave (%0)":: "r" (image));
761}
762
763static inline void fx_restore(struct i387_fxsave_struct *image)
764{
765 asm ("fxrstor (%0)":: "r" (image));
766}
767
768static inline void fpu_init(void)
769{
770 asm ("finit");
771}
772
773static inline u32 get_rdx_init_val(void)
774{
775 return 0x600; /* P6 family */
776}
777
778#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
779#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
780#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
781#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
782#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
783#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
784#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
785#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
786#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
787
788#define MSR_IA32_TIME_STAMP_COUNTER 0x010
789
790#define TSS_IOPB_BASE_OFFSET 0x66
791#define TSS_BASE_SIZE 0x68
792#define TSS_IOPB_SIZE (65536 / 8)
793#define TSS_REDIRECTION_SIZE (256 / 8)
794#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
795
796#endif