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[linux.git] / drivers / kvm / kvm.h
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6aa8b732
AK		 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>
06ff0d37
MR		 13#include <linux/signal.h>
14#include <linux/sched.h>
6aa8b732 15#include <linux/mm.h>
e8edc6e0 16#include <asm/signal.h>
6aa8b732
AK		 17
18#include "vmx.h"
19#include <linux/kvm.h>
102d8325 20#include <linux/kvm_para.h>
6aa8b732
AK		 21
22#define CR0_PE_MASK (1ULL << 0)
a3a06367 23#define CR0_MP_MASK (1ULL << 1)
6aa8b732
AK		 24#define CR0_TS_MASK (1ULL << 3)
25#define CR0_NE_MASK (1ULL << 5)
26#define CR0_WP_MASK (1ULL << 16)
27#define CR0_NW_MASK (1ULL << 29)
28#define CR0_CD_MASK (1ULL << 30)
29#define CR0_PG_MASK (1ULL << 31)
30
31#define CR3_WPT_MASK (1ULL << 3)
32#define CR3_PCD_MASK (1ULL << 4)
33
34#define CR3_RESEVED_BITS 0x07ULL
35#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
36#define CR3_FLAGS_MASK ((1ULL << 5) - 1)
37
38#define CR4_VME_MASK (1ULL << 0)
39#define CR4_PSE_MASK (1ULL << 4)
40#define CR4_PAE_MASK (1ULL << 5)
41#define CR4_PGE_MASK (1ULL << 7)
42#define CR4_VMXE_MASK (1ULL << 13)
43
44#define KVM_GUEST_CR0_MASK \
45 (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
46 | CR0_NW_MASK | CR0_CD_MASK)
47#define KVM_VM_CR0_ALWAYS_ON \
a3a06367
AK		 48 (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK | CR0_TS_MASK \
49 | CR0_MP_MASK)
6aa8b732
AK		 50#define KVM_GUEST_CR4_MASK \
51 (CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
52#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
53#define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)
54
55#define INVALID_PAGE (~(hpa_t)0)
56#define UNMAPPED_GVA (~(gpa_t)0)
57
ef9254df 58#define KVM_MAX_VCPUS 4
e8207547 59#define KVM_ALIAS_SLOTS 4
6aa8b732 60#define KVM_MEMORY_SLOTS 4
7494c0cc 61#define KVM_NUM_MMU_PAGES 1024
ebeace86
AK		 62#define KVM_MIN_FREE_MMU_PAGES 5
63#define KVM_REFILL_PAGES 25
06465c5a 64#define KVM_MAX_CPUID_ENTRIES 40
6aa8b732
AK		 65
66#define FX_IMAGE_SIZE 512
67#define FX_IMAGE_ALIGN 16
68#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
69
70#define DE_VECTOR 0
7807fa6c 71#define NM_VECTOR 7
6aa8b732
AK		 72#define DF_VECTOR 8
73#define TS_VECTOR 10
74#define NP_VECTOR 11
75#define SS_VECTOR 12
76#define GP_VECTOR 13
77#define PF_VECTOR 14
78
79#define SELECTOR_TI_MASK (1 << 2)
80#define SELECTOR_RPL_MASK 0x03
81
82#define IOPL_SHIFT 12
83
039576c0
AK		 84#define KVM_PIO_PAGE_OFFSET 1
85
d9e368d6
AK		 86/*
87 * vcpu->requests bit members
88 */
89#define KVM_TLB_FLUSH 0
90
6aa8b732
AK		 91/*
92 * Address types:
93 *
94 * gva - guest virtual address
95 * gpa - guest physical address
96 * gfn - guest frame number
97 * hva - host virtual address
98 * hpa - host physical address
99 * hfn - host frame number
100 */
101
102typedef unsigned long gva_t;
103typedef u64 gpa_t;
104typedef unsigned long gfn_t;
105
106typedef unsigned long hva_t;
107typedef u64 hpa_t;
108typedef unsigned long hfn_t;
109
cea0f0e7
AK		 110#define NR_PTE_CHAIN_ENTRIES 5
111
112struct kvm_pte_chain {
113 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
114 struct hlist_node link;
115};
116
117/*
118 * kvm_mmu_page_role, below, is defined as:
119 *
120 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
121 * bits 4:7 - page table level for this shadow (1-4)
122 * bits 8:9 - page table quadrant for 2-level guests
123 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
d55e2cb2 124 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
cea0f0e7
AK		 125 */
126union kvm_mmu_page_role {
127 unsigned word;
128 struct {
129 unsigned glevels : 4;
130 unsigned level : 4;
131 unsigned quadrant : 2;
132 unsigned pad_for_nice_hex_output : 6;
133 unsigned metaphysical : 1;
d55e2cb2 134 unsigned hugepage_access : 3;
cea0f0e7
AK		 135 };
136};
137
6aa8b732
AK		 138struct kvm_mmu_page {
139 struct list_head link;
cea0f0e7
AK		 140 struct hlist_node hash_link;
141
142 /*
143 * The following two entries are used to key the shadow page in the
144 * hash table.
145 */
146 gfn_t gfn;
147 union kvm_mmu_page_role role;
148
47ad8e68 149 u64 *spt;
6aa8b732
AK		 150 unsigned long slot_bitmap; /* One bit set per slot which has memory
151 * in this shadow page.
152 */
cea0f0e7 153 int multimapped; /* More than one parent_pte? */
3bb65a22 154 int root_count; /* Currently serving as active root */
cea0f0e7
AK		 155 union {
156 u64 *parent_pte; /* !multimapped */
157 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
158 };
6aa8b732
AK		 159};
160
161struct vmcs {
162 u32 revision_id;
163 u32 abort;
164 char data[0];
165};
166
167#define vmx_msr_entry kvm_msr_entry
168
169struct kvm_vcpu;
170
171/*
172 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
173 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
174 * mode.
175 */
176struct kvm_mmu {
177 void (*new_cr3)(struct kvm_vcpu *vcpu);
178 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
6aa8b732
AK		 179 void (*free)(struct kvm_vcpu *vcpu);
180 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
181 hpa_t root_hpa;
182 int root_level;
183 int shadow_root_level;
17ac10ad
AK		 184
185 u64 *pae_root;
6aa8b732
AK		 186};
187
714b93da
AK		 188#define KVM_NR_MEM_OBJS 20
189
190struct kvm_mmu_memory_cache {
191 int nobjs;
192 void *objects[KVM_NR_MEM_OBJS];
193};
194
195/*
196 * We don't want allocation failures within the mmu code, so we preallocate
197 * enough memory for a single page fault in a cache.
198 */
6aa8b732
AK		 199struct kvm_guest_debug {
200 int enabled;
201 unsigned long bp[4];
202 int singlestep;
203};
204
205enum {
206 VCPU_REGS_RAX = 0,
207 VCPU_REGS_RCX = 1,
208 VCPU_REGS_RDX = 2,
209 VCPU_REGS_RBX = 3,
210 VCPU_REGS_RSP = 4,
211 VCPU_REGS_RBP = 5,
212 VCPU_REGS_RSI = 6,
213 VCPU_REGS_RDI = 7,
05b3e0c2 214#ifdef CONFIG_X86_64
6aa8b732
AK		 215 VCPU_REGS_R8 = 8,
216 VCPU_REGS_R9 = 9,
217 VCPU_REGS_R10 = 10,
218 VCPU_REGS_R11 = 11,
219 VCPU_REGS_R12 = 12,
220 VCPU_REGS_R13 = 13,
221 VCPU_REGS_R14 = 14,
222 VCPU_REGS_R15 = 15,
223#endif
224 NR_VCPU_REGS
225};
226
227enum {
228 VCPU_SREG_CS,
229 VCPU_SREG_DS,
230 VCPU_SREG_ES,
231 VCPU_SREG_FS,
232 VCPU_SREG_GS,
233 VCPU_SREG_SS,
234 VCPU_SREG_TR,
235 VCPU_SREG_LDTR,
236};
237
039576c0
AK		 238struct kvm_pio_request {
239 unsigned long count;
240 int cur_count;
241 struct page *guest_pages[2];
242 unsigned guest_page_offset;
243 int in;
74906345 244 int port;
039576c0
AK		 245 int size;
246 int string;
247 int down;
248 int rep;
249};
250
1165f5fe
AK		 251struct kvm_stat {
252 u32 pf_fixed;
253 u32 pf_guest;
254 u32 tlb_flush;
255 u32 invlpg;
256
257 u32 exits;
258 u32 io_exits;
259 u32 mmio_exits;
260 u32 signal_exits;
261 u32 irq_window_exits;
262 u32 halt_exits;
263 u32 request_irq_exits;
264 u32 irq_exits;
e6adf283 265 u32 light_exits;
2cc51560 266 u32 efer_reload;
1165f5fe
AK		 267};
268
2eeb2e94
GH		 269struct kvm_io_device {
270 void (*read)(struct kvm_io_device *this,
271 gpa_t addr,
272 int len,
273 void *val);
274 void (*write)(struct kvm_io_device *this,
275 gpa_t addr,
276 int len,
277 const void *val);
278 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
279 void (*destructor)(struct kvm_io_device *this);
280
281 void *private;
282};
283
284static inline void kvm_iodevice_read(struct kvm_io_device *dev,
285 gpa_t addr,
286 int len,
287 void *val)
288{
289 dev->read(dev, addr, len, val);
290}
291
292static inline void kvm_iodevice_write(struct kvm_io_device *dev,
293 gpa_t addr,
294 int len,
295 const void *val)
296{
297 dev->write(dev, addr, len, val);
298}
299
300static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
301{
302 return dev->in_range(dev, addr);
303}
304
305static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
306{
74906345
ED		 307 if (dev->destructor)
308 dev->destructor(dev);
2eeb2e94
GH		 309}
310
311/*
312 * It would be nice to use something smarter than a linear search, TBD...
313 * Thankfully we dont expect many devices to register (famous last words :),
314 * so until then it will suffice. At least its abstracted so we can change
315 * in one place.
316 */
317struct kvm_io_bus {
318 int dev_count;
319#define NR_IOBUS_DEVS 6
320 struct kvm_io_device *devs[NR_IOBUS_DEVS];
321};
322
323void kvm_io_bus_init(struct kvm_io_bus *bus);
324void kvm_io_bus_destroy(struct kvm_io_bus *bus);
325struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
326void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
327 struct kvm_io_device *dev);
328
6aa8b732
AK		 329struct kvm_vcpu {
330 struct kvm *kvm;
331 union {
332 struct vmcs *vmcs;
333 struct vcpu_svm *svm;
334 };
335 struct mutex mutex;
336 int cpu;
337 int launched;
0cc5064d 338 u64 host_tsc;
9a2bb7f4 339 struct kvm_run *run;
c1150d8c 340 int interrupt_window_open;
d9e368d6
AK		 341 int guest_mode;
342 unsigned long requests;
6aa8b732
AK		 343 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
344#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
345 unsigned long irq_pending[NR_IRQ_WORDS];
346 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
347 unsigned long rip; /* needs vcpu_load_rsp_rip() */
348
349 unsigned long cr0;
350 unsigned long cr2;
351 unsigned long cr3;
102d8325
IM		 352 gpa_t para_state_gpa;
353 struct page *para_state_page;
354 gpa_t hypercall_gpa;
6aa8b732
AK		 355 unsigned long cr4;
356 unsigned long cr8;
1342d353 357 u64 pdptrs[4]; /* pae */
6aa8b732
AK		 358 u64 shadow_efer;
359 u64 apic_base;
6f00e68f 360 u64 ia32_misc_enable_msr;
6aa8b732 361 int nmsrs;
a75beee6 362 int save_nmsrs;
2cc51560 363 int msr_offset_efer;
a75beee6
ED		 364#ifdef CONFIG_X86_64
365 int msr_offset_kernel_gs_base;
366#endif
6aa8b732
AK		 367 struct vmx_msr_entry *guest_msrs;
368 struct vmx_msr_entry *host_msrs;
369
6aa8b732
AK		 370 struct kvm_mmu mmu;
371
714b93da
AK		 372 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
373 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
d3d25b04
AK		 374 struct kvm_mmu_memory_cache mmu_page_cache;
375 struct kvm_mmu_memory_cache mmu_page_header_cache;
714b93da 376
86a5ba02
AK		 377 gfn_t last_pt_write_gfn;
378 int last_pt_write_count;
379
6aa8b732
AK		 380 struct kvm_guest_debug guest_debug;
381
382 char fx_buf[FX_BUF_SIZE];
383 char *host_fx_image;
384 char *guest_fx_image;
7807fa6c 385 int fpu_active;
7702fd1f 386 int guest_fpu_loaded;
33ed6329
AK		 387 struct vmx_host_state {
388 int loaded;
389 u16 fs_sel, gs_sel, ldt_sel;
390 int fs_gs_ldt_reload_needed;
391 } vmx_host_state;
6aa8b732
AK		 392
393 int mmio_needed;
394 int mmio_read_completed;
395 int mmio_is_write;
396 int mmio_size;
397 unsigned char mmio_data[8];
398 gpa_t mmio_phys_addr;
e7df56e4 399 gva_t mmio_fault_cr2;
039576c0
AK		 400 struct kvm_pio_request pio;
401 void *pio_data;
6aa8b732 402
1961d276
AK		 403 int sigset_active;
404 sigset_t sigset;
405
1165f5fe
AK		 406 struct kvm_stat stat;
407
6aa8b732
AK		 408 struct {
409 int active;
410 u8 save_iopl;
411 struct kvm_save_segment {
412 u16 selector;
413 unsigned long base;
414 u32 limit;
415 u32 ar;
416 } tr, es, ds, fs, gs;
417 } rmode;
72d6e5a0 418 int halt_request; /* real mode on Intel only */
06465c5a
AK		 419
420 int cpuid_nent;
421 struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
6aa8b732
AK		 422};
423
e8207547
AK		 424struct kvm_mem_alias {
425 gfn_t base_gfn;
426 unsigned long npages;
427 gfn_t target_gfn;
428};
429
6aa8b732
AK		 430struct kvm_memory_slot {
431 gfn_t base_gfn;
432 unsigned long npages;
433 unsigned long flags;
434 struct page **phys_mem;
435 unsigned long *dirty_bitmap;
436};
437
438struct kvm {
439 spinlock_t lock; /* protects everything except vcpus */
e8207547
AK		 440 int naliases;
441 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
6aa8b732
AK		 442 int nmemslots;
443 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
cea0f0e7
AK		 444 /*
445 * Hash table of struct kvm_mmu_page.
446 */
6aa8b732 447 struct list_head active_mmu_pages;
ebeace86 448 int n_free_mmu_pages;
cea0f0e7 449 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
39c3b86e 450 int nvcpus;
6aa8b732
AK		 451 struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
452 int memory_config_version;
453 int busy;
cd4a4e53 454 unsigned long rmap_overflow;
133de902 455 struct list_head vm_list;
bccf2150 456 struct file *filp;
2eeb2e94 457 struct kvm_io_bus mmio_bus;
74906345 458 struct kvm_io_bus pio_bus;
6aa8b732
AK		 459};
460
6aa8b732
AK		 461struct descriptor_table {
462 u16 limit;
463 unsigned long base;
464} __attribute__((packed));
465
466struct kvm_arch_ops {
467 int (*cpu_has_kvm_support)(void); /* __init */
468 int (*disabled_by_bios)(void); /* __init */
469 void (*hardware_enable)(void *dummy); /* __init */
470 void (*hardware_disable)(void *dummy);
471 int (*hardware_setup)(void); /* __init */
472 void (*hardware_unsetup)(void); /* __exit */
473
474 int (*vcpu_create)(struct kvm_vcpu *vcpu);
475 void (*vcpu_free)(struct kvm_vcpu *vcpu);
476
bccf2150 477 void (*vcpu_load)(struct kvm_vcpu *vcpu);
6aa8b732 478 void (*vcpu_put)(struct kvm_vcpu *vcpu);
774c47f1 479 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
6aa8b732
AK		 480
481 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
482 struct kvm_debug_guest *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 void (*set_segment)(struct kvm_vcpu *vcpu,
489 struct kvm_segment *var, int seg);
6aa8b732 490 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
25c4c276 491 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
6aa8b732 492 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
6aa8b732
AK		 493 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
494 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
495 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
496 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
497 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
498 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
499 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
500 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
501 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
502 int *exception);
503 void (*cache_regs)(struct kvm_vcpu *vcpu);
504 void (*decache_regs)(struct kvm_vcpu *vcpu);
505 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
506 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
507
508 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
509 void (*tlb_flush)(struct kvm_vcpu *vcpu);
510 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
511 unsigned long addr, u32 err_code);
512
513 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
514
515 int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
516 int (*vcpu_setup)(struct kvm_vcpu *vcpu);
517 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
102d8325
IM		 518 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
519 unsigned char *hypercall_addr);
6aa8b732
AK		 520};
521
6aa8b732
AK		 522extern struct kvm_arch_ops *kvm_arch_ops;
523
524#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
525#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
526
527int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
528void kvm_exit_arch(void);
529
b5a33a75
AK		 530int kvm_mmu_module_init(void);
531void kvm_mmu_module_exit(void);
532
6aa8b732 533void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
8018c27b
IM		 534int kvm_mmu_create(struct kvm_vcpu *vcpu);
535int kvm_mmu_setup(struct kvm_vcpu *vcpu);
6aa8b732
AK		 536
537int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
90cb0529
AK		 538void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
539void kvm_mmu_zap_all(struct kvm *kvm);
6aa8b732
AK		 540
541hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
542#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
543#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
544static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
545hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
039576c0 546struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
6aa8b732
AK		 547
548void kvm_emulator_want_group7_invlpg(void);
549
550extern hpa_t bad_page_address;
551
954bbbc2 552struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
6aa8b732
AK		 553struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
554void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
555
556enum emulation_result {
557 EMULATE_DONE, /* no further processing */
558 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
559 EMULATE_FAIL, /* can't emulate this instruction */
560};
561
562int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
563 unsigned long cr2, u16 error_code);
564void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
565void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
566void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
567 unsigned long *rflags);
568
569unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
570void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
571 unsigned long *rflags);
35f3f286
AK		 572int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
573int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
6aa8b732
AK		 574
575struct x86_emulate_ctxt;
576
039576c0
AK		 577int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
578 int size, unsigned long count, int string, int down,
579 gva_t address, int rep, unsigned port);
06465c5a 580void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
d3bef15f 581int kvm_emulate_halt(struct kvm_vcpu *vcpu);
6aa8b732
AK		 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);
593void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
594
3bab1f5d
AK		 595int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
596int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
6aa8b732
AK		 597
598void fx_init(struct kvm_vcpu *vcpu);
599
600void load_msrs(struct vmx_msr_entry *e, int n);
601void save_msrs(struct vmx_msr_entry *e, int n);
602void kvm_resched(struct kvm_vcpu *vcpu);
7702fd1f
AK		 603void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
604void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
d9e368d6 605void kvm_flush_remote_tlbs(struct kvm *kvm);
6aa8b732
AK		 606
607int kvm_read_guest(struct kvm_vcpu *vcpu,
608 gva_t addr,
609 unsigned long size,
610 void *dest);
611
612int kvm_write_guest(struct kvm_vcpu *vcpu,
613 gva_t addr,
614 unsigned long size,
615 void *data);
616
617unsigned long segment_base(u16 selector);
618
09072daf
AK		 619void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
620 const u8 *old, const u8 *new, int bytes);
a436036b 621int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
ebeace86 622void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
17c3ba9d
AK		 623int kvm_mmu_load(struct kvm_vcpu *vcpu);
624void kvm_mmu_unload(struct kvm_vcpu *vcpu);
ebeace86 625
270fd9b9
AK		 626int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
627
ebeace86
AK		 628static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
629 u32 error_code)
630{
631 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
632 kvm_mmu_free_some_pages(vcpu);
633 return vcpu->mmu.page_fault(vcpu, gva, error_code);
634}
da4a00f0 635
17c3ba9d
AK		 636static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
637{
638 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
639 return 0;
640
641 return kvm_mmu_load(vcpu);
642}
643
a9058ecd
AK		 644static inline int is_long_mode(struct kvm_vcpu *vcpu)
645{
646#ifdef CONFIG_X86_64
647 return vcpu->shadow_efer & EFER_LME;
648#else
649 return 0;
650#endif
651}
652
6aa8b732
AK		 653static inline int is_pae(struct kvm_vcpu *vcpu)
654{
655 return vcpu->cr4 & CR4_PAE_MASK;
656}
657
658static inline int is_pse(struct kvm_vcpu *vcpu)
659{
660 return vcpu->cr4 & CR4_PSE_MASK;
661}
662
663static inline int is_paging(struct kvm_vcpu *vcpu)
664{
665 return vcpu->cr0 & CR0_PG_MASK;
666}
667
668static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
669{
670 return slot - kvm->memslots;
671}
672
673static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
674{
675 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
676
5972e953 677 return (struct kvm_mmu_page *)page_private(page);
6aa8b732
AK		 678}
679
680static inline u16 read_fs(void)
681{
682 u16 seg;
683 asm ("mov %%fs, %0" : "=g"(seg));
684 return seg;
685}
686
687static inline u16 read_gs(void)
688{
689 u16 seg;
690 asm ("mov %%gs, %0" : "=g"(seg));
691 return seg;
692}
693
694static inline u16 read_ldt(void)
695{
696 u16 ldt;
697 asm ("sldt %0" : "=g"(ldt));
698 return ldt;
699}
700
701static inline void load_fs(u16 sel)
702{
703 asm ("mov %0, %%fs" : : "rm"(sel));
704}
705
706static inline void load_gs(u16 sel)
707{
708 asm ("mov %0, %%gs" : : "rm"(sel));
709}
710
711#ifndef load_ldt
712static inline void load_ldt(u16 sel)
713{
a0610ddf 714 asm ("lldt %0" : : "rm"(sel));
6aa8b732
AK		 715}
716#endif
717
718static inline void get_idt(struct descriptor_table *table)
719{
720 asm ("sidt %0" : "=m"(*table));
721}
722
723static inline void get_gdt(struct descriptor_table *table)
724{
725 asm ("sgdt %0" : "=m"(*table));
726}
727
728static inline unsigned long read_tr_base(void)
729{
730 u16 tr;
731 asm ("str %0" : "=g"(tr));
732 return segment_base(tr);
733}
734
05b3e0c2 735#ifdef CONFIG_X86_64
6aa8b732
AK		 736static inline unsigned long read_msr(unsigned long msr)
737{
738 u64 value;
739
740 rdmsrl(msr, value);
741 return value;
742}
743#endif
744
745static inline void fx_save(void *image)
746{
747 asm ("fxsave (%0)":: "r" (image));
748}
749
750static inline void fx_restore(void *image)
751{
752 asm ("fxrstor (%0)":: "r" (image));
753}
754
755static inline void fpu_init(void)
756{
757 asm ("finit");
758}
759
760static inline u32 get_rdx_init_val(void)
761{
762 return 0x600; /* P6 family */
763}
764
765#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
766#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
767#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
768#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
769#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
770#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
771#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
772#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
773#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
774
775#define MSR_IA32_TIME_STAMP_COUNTER 0x010
776
777#define TSS_IOPB_BASE_OFFSET 0x66
778#define TSS_BASE_SIZE 0x68
779#define TSS_IOPB_SIZE (65536 / 8)
780#define TSS_REDIRECTION_SIZE (256 / 8)
781#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
782
6aa8b732 783#endif
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