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KVM: Reduce stack usage in kvm_arch_vcpu_ioctl()
[mirror_ubuntu-disco-kernel.git] / include / asm-x86 / kvm_host.h
CommitLineData
a656c8ef 1/*
043405e1
CO		 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
77ef50a5
VN		 11#ifndef ASM_X86__KVM_HOST_H
12#define ASM_X86__KVM_HOST_H
043405e1 13
34c16eec
ZX		 14#include <linux/types.h>
15#include <linux/mm.h>
e930bffe 16#include <linux/mmu_notifier.h>
34c16eec
ZX		 17
18#include <linux/kvm.h>
19#include <linux/kvm_para.h>
edf88417 20#include <linux/kvm_types.h>
34c16eec 21
50d0a0f9 22#include <asm/pvclock-abi.h>
e01a1b57
HB		 23#include <asm/desc.h>
24
69a9f69b
AK		 25#define KVM_MAX_VCPUS 16
26#define KVM_MEMORY_SLOTS 32
27/* memory slots that does not exposed to userspace */
28#define KVM_PRIVATE_MEM_SLOTS 4
29
30#define KVM_PIO_PAGE_OFFSET 1
542472b5 31#define KVM_COALESCED_MMIO_PAGE_OFFSET 2
69a9f69b 32
cd6e8f87
ZX		 33#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
34#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
7d76b4d3
JP		 35#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
36 0xFFFFFF0000000000ULL)
cd6e8f87 37
7d76b4d3 38#define KVM_GUEST_CR0_MASK \
cd6e8f87
ZX		 39 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
40 | X86_CR0_NW | X86_CR0_CD)
7d76b4d3 41#define KVM_VM_CR0_ALWAYS_ON \
cd6e8f87
ZX		 42 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
43 | X86_CR0_MP)
7d76b4d3 44#define KVM_GUEST_CR4_MASK \
cd6e8f87
ZX		 45 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
46#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
47#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
48
49#define INVALID_PAGE (~(hpa_t)0)
50#define UNMAPPED_GVA (~(gpa_t)0)
51
05da4558
MT		 52/* shadow tables are PAE even on non-PAE hosts */
53#define KVM_HPAGE_SHIFT 21
54#define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
55#define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
56
57#define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
58
cd6e8f87 59#define DE_VECTOR 0
19bd8afd 60#define DB_VECTOR 1
77ab6db0
JK		 61#define BP_VECTOR 3
62#define OF_VECTOR 4
63#define BR_VECTOR 5
cd6e8f87
ZX		 64#define UD_VECTOR 6
65#define NM_VECTOR 7
66#define DF_VECTOR 8
67#define TS_VECTOR 10
68#define NP_VECTOR 11
69#define SS_VECTOR 12
70#define GP_VECTOR 13
71#define PF_VECTOR 14
77ab6db0 72#define MF_VECTOR 16
53371b50 73#define MC_VECTOR 18
cd6e8f87
ZX		 74
75#define SELECTOR_TI_MASK (1 << 2)
76#define SELECTOR_RPL_MASK 0x03
77
78#define IOPL_SHIFT 12
79
d69fb81f
ZX		 80#define KVM_ALIAS_SLOTS 4
81
d657a98e
ZX		 82#define KVM_PERMILLE_MMU_PAGES 20
83#define KVM_MIN_ALLOC_MMU_PAGES 64
1ae0a13d
DE		 84#define KVM_MMU_HASH_SHIFT 10
85#define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
d657a98e
ZX		 86#define KVM_MIN_FREE_MMU_PAGES 5
87#define KVM_REFILL_PAGES 25
88#define KVM_MAX_CPUID_ENTRIES 40
9ba075a6 89#define KVM_NR_VAR_MTRR 8
d657a98e 90
e9b11c17
ZX		 91extern spinlock_t kvm_lock;
92extern struct list_head vm_list;
93
d657a98e
ZX		 94struct kvm_vcpu;
95struct kvm;
96
5fdbf976 97enum kvm_reg {
2b3ccfa0
ZX		 98 VCPU_REGS_RAX = 0,
99 VCPU_REGS_RCX = 1,
100 VCPU_REGS_RDX = 2,
101 VCPU_REGS_RBX = 3,
102 VCPU_REGS_RSP = 4,
103 VCPU_REGS_RBP = 5,
104 VCPU_REGS_RSI = 6,
105 VCPU_REGS_RDI = 7,
106#ifdef CONFIG_X86_64
107 VCPU_REGS_R8 = 8,
108 VCPU_REGS_R9 = 9,
109 VCPU_REGS_R10 = 10,
110 VCPU_REGS_R11 = 11,
111 VCPU_REGS_R12 = 12,
112 VCPU_REGS_R13 = 13,
113 VCPU_REGS_R14 = 14,
114 VCPU_REGS_R15 = 15,
115#endif
5fdbf976 116 VCPU_REGS_RIP,
2b3ccfa0
ZX		 117 NR_VCPU_REGS
118};
119
120enum {
81609e3e 121 VCPU_SREG_ES,
2b3ccfa0 122 VCPU_SREG_CS,
81609e3e 123 VCPU_SREG_SS,
2b3ccfa0 124 VCPU_SREG_DS,
2b3ccfa0
ZX		 125 VCPU_SREG_FS,
126 VCPU_SREG_GS,
2b3ccfa0
ZX		 127 VCPU_SREG_TR,
128 VCPU_SREG_LDTR,
129};
130
edf88417 131#include <asm/kvm_x86_emulate.h>
2b3ccfa0 132
d657a98e
ZX		 133#define KVM_NR_MEM_OBJS 40
134
69a9f69b
AK		 135struct kvm_guest_debug {
136 int enabled;
137 unsigned long bp[4];
138 int singlestep;
139};
140
d657a98e
ZX		 141/*
142 * We don't want allocation failures within the mmu code, so we preallocate
143 * enough memory for a single page fault in a cache.
144 */
145struct kvm_mmu_memory_cache {
146 int nobjs;
147 void *objects[KVM_NR_MEM_OBJS];
148};
149
150#define NR_PTE_CHAIN_ENTRIES 5
151
152struct kvm_pte_chain {
153 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
154 struct hlist_node link;
155};
156
157/*
158 * kvm_mmu_page_role, below, is defined as:
159 *
160 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
161 * bits 4:7 - page table level for this shadow (1-4)
162 * bits 8:9 - page table quadrant for 2-level guests
163 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
164 * bits 17:19 - common access permissions for all ptes in this shadow page
165 */
166union kvm_mmu_page_role {
167 unsigned word;
168 struct {
7d76b4d3
JP		 169 unsigned glevels:4;
170 unsigned level:4;
171 unsigned quadrant:2;
172 unsigned pad_for_nice_hex_output:6;
173 unsigned metaphysical:1;
174 unsigned access:3;
2e53d63a 175 unsigned invalid:1;
d657a98e
ZX		 176 };
177};
178
179struct kvm_mmu_page {
180 struct list_head link;
181 struct hlist_node hash_link;
182
183 /*
184 * The following two entries are used to key the shadow page in the
185 * hash table.
186 */
187 gfn_t gfn;
188 union kvm_mmu_page_role role;
189
190 u64 *spt;
191 /* hold the gfn of each spte inside spt */
192 gfn_t *gfns;
193 unsigned long slot_bitmap; /* One bit set per slot which has memory
194 * in this shadow page.
195 */
196 int multimapped; /* More than one parent_pte? */
197 int root_count; /* Currently serving as active root */
198 union {
199 u64 *parent_pte; /* !multimapped */
200 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
201 };
202};
203
204/*
205 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
206 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
207 * mode.
208 */
209struct kvm_mmu {
210 void (*new_cr3)(struct kvm_vcpu *vcpu);
211 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
212 void (*free)(struct kvm_vcpu *vcpu);
213 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
214 void (*prefetch_page)(struct kvm_vcpu *vcpu,
215 struct kvm_mmu_page *page);
216 hpa_t root_hpa;
217 int root_level;
218 int shadow_root_level;
219
220 u64 *pae_root;
221};
222
ad312c7c 223struct kvm_vcpu_arch {
34c16eec
ZX		 224 u64 host_tsc;
225 int interrupt_window_open;
226 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
227 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
5fdbf976
MT		 228 /*
229 * rip and regs accesses must go through
230 * kvm_{register,rip}_{read,write} functions.
231 */
232 unsigned long regs[NR_VCPU_REGS];
233 u32 regs_avail;
234 u32 regs_dirty;
34c16eec
ZX		 235
236 unsigned long cr0;
237 unsigned long cr2;
238 unsigned long cr3;
239 unsigned long cr4;
240 unsigned long cr8;
241 u64 pdptrs[4]; /* pae */
242 u64 shadow_efer;
243 u64 apic_base;
244 struct kvm_lapic *apic; /* kernel irqchip context */
34c16eec
ZX		 245 int mp_state;
246 int sipi_vector;
247 u64 ia32_misc_enable_msr;
b209749f 248 bool tpr_access_reporting;
34c16eec
ZX		 249
250 struct kvm_mmu mmu;
251
252 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
253 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
254 struct kvm_mmu_memory_cache mmu_page_cache;
255 struct kvm_mmu_memory_cache mmu_page_header_cache;
256
257 gfn_t last_pt_write_gfn;
258 int last_pt_write_count;
259 u64 *last_pte_updated;
1b7fcd32 260 gfn_t last_pte_gfn;
34c16eec 261
d7824fff 262 struct {
35149e21
AL		 263 gfn_t gfn; /* presumed gfn during guest pte update */
264 pfn_t pfn; /* pfn corresponding to that gfn */
05da4558 265 int largepage;
e930bffe 266 unsigned long mmu_seq;
d7824fff
AK		 267 } update_pte;
268
34c16eec
ZX		 269 struct i387_fxsave_struct host_fx_image;
270 struct i387_fxsave_struct guest_fx_image;
271
272 gva_t mmio_fault_cr2;
273 struct kvm_pio_request pio;
274 void *pio_data;
275
298101da
AK		 276 struct kvm_queued_exception {
277 bool pending;
278 bool has_error_code;
279 u8 nr;
280 u32 error_code;
281 } exception;
282
937a7eae
AK		 283 struct kvm_queued_interrupt {
284 bool pending;
285 u8 nr;
286 } interrupt;
287
34c16eec
ZX		 288 struct {
289 int active;
290 u8 save_iopl;
291 struct kvm_save_segment {
292 u16 selector;
293 unsigned long base;
294 u32 limit;
295 u32 ar;
296 } tr, es, ds, fs, gs;
297 } rmode;
298 int halt_request; /* real mode on Intel only */
299
300 int cpuid_nent;
07716717 301 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
34c16eec
ZX		 302 /* emulate context */
303
304 struct x86_emulate_ctxt emulate_ctxt;
18068523
GOC		 305
306 gpa_t time;
50d0a0f9
GH		 307 struct pvclock_vcpu_time_info hv_clock;
308 unsigned int hv_clock_tsc_khz;
18068523
GOC		 309 unsigned int time_offset;
310 struct page *time_page;
3419ffc8
SY		 311
312 bool nmi_pending;
668f612f 313 bool nmi_injected;
9ba075a6
AK		 314
315 u64 mtrr[0x100];
34c16eec
ZX		 316};
317
d69fb81f
ZX		 318struct kvm_mem_alias {
319 gfn_t base_gfn;
320 unsigned long npages;
321 gfn_t target_gfn;
322};
323
564f1537
AK		 324struct kvm_irq_ack_notifier {
325 struct hlist_node link;
326 unsigned gsi;
327 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
328};
329
4d5c5d0f
BAY		 330struct kvm_assigned_dev_kernel {
331 struct kvm_irq_ack_notifier ack_notifier;
332 struct work_struct interrupt_work;
333 struct list_head list;
334 struct kvm_assigned_pci_dev assigned_dev;
335 int assigned_dev_id;
336 int host_busnr;
337 int host_devfn;
338 int host_irq;
339 int guest_irq;
340 int irq_requested;
341 struct pci_dev *dev;
342 struct kvm *kvm;
343};
344
d69fb81f
ZX		 345struct kvm_arch{
346 int naliases;
347 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
f05e70ac
ZX		 348
349 unsigned int n_free_mmu_pages;
350 unsigned int n_requested_mmu_pages;
351 unsigned int n_alloc_mmu_pages;
352 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
353 /*
354 * Hash table of struct kvm_mmu_page.
355 */
356 struct list_head active_mmu_pages;
4d5c5d0f 357 struct list_head assigned_dev_head;
d7deeeb0
ZX		 358 struct kvm_pic *vpic;
359 struct kvm_ioapic *vioapic;
7837699f 360 struct kvm_pit *vpit;
564f1537 361 struct hlist_head irq_ack_notifier_list;
bfc6d222
ZX		 362
363 int round_robin_prev_vcpu;
364 unsigned int tss_addr;
365 struct page *apic_access_page;
18068523
GOC		 366
367 gpa_t wall_clock;
b7ebfb05
SY		 368
369 struct page *ept_identity_pagetable;
370 bool ept_identity_pagetable_done;
d69fb81f
ZX		 371};
372
0711456c
ZX		 373struct kvm_vm_stat {
374 u32 mmu_shadow_zapped;
375 u32 mmu_pte_write;
376 u32 mmu_pte_updated;
377 u32 mmu_pde_zapped;
378 u32 mmu_flooded;
379 u32 mmu_recycled;
dfc5aa00 380 u32 mmu_cache_miss;
0711456c 381 u32 remote_tlb_flush;
05da4558 382 u32 lpages;
0711456c
ZX		 383};
384
77b4c255
ZX		 385struct kvm_vcpu_stat {
386 u32 pf_fixed;
387 u32 pf_guest;
388 u32 tlb_flush;
389 u32 invlpg;
390
391 u32 exits;
392 u32 io_exits;
393 u32 mmio_exits;
394 u32 signal_exits;
395 u32 irq_window_exits;
f08864b4 396 u32 nmi_window_exits;
77b4c255
ZX		 397 u32 halt_exits;
398 u32 halt_wakeup;
399 u32 request_irq_exits;
400 u32 irq_exits;
401 u32 host_state_reload;
402 u32 efer_reload;
403 u32 fpu_reload;
404 u32 insn_emulation;
405 u32 insn_emulation_fail;
f11c3a8d 406 u32 hypercalls;
77b4c255 407};
ad312c7c 408
e01a1b57
HB		 409struct descriptor_table {
410 u16 limit;
411 unsigned long base;
412} __attribute__((packed));
413
ea4a5ff8
ZX		 414struct kvm_x86_ops {
415 int (*cpu_has_kvm_support)(void); /* __init */
416 int (*disabled_by_bios)(void); /* __init */
417 void (*hardware_enable)(void *dummy); /* __init */
418 void (*hardware_disable)(void *dummy);
419 void (*check_processor_compatibility)(void *rtn);
420 int (*hardware_setup)(void); /* __init */
421 void (*hardware_unsetup)(void); /* __exit */
774ead3a 422 bool (*cpu_has_accelerated_tpr)(void);
ea4a5ff8
ZX		 423
424 /* Create, but do not attach this VCPU */
425 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
426 void (*vcpu_free)(struct kvm_vcpu *vcpu);
427 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
428
429 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
430 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
431 void (*vcpu_put)(struct kvm_vcpu *vcpu);
ea4a5ff8
ZX		 432
433 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
434 struct kvm_debug_guest *dbg);
435 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
436 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
437 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
438 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
439 void (*get_segment)(struct kvm_vcpu *vcpu,
440 struct kvm_segment *var, int seg);
2e4d2653 441 int (*get_cpl)(struct kvm_vcpu *vcpu);
ea4a5ff8
ZX		 442 void (*set_segment)(struct kvm_vcpu *vcpu,
443 struct kvm_segment *var, int seg);
444 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
445 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
446 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
447 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
448 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
449 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
450 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
451 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
452 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
453 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
454 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
455 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
456 int *exception);
5fdbf976 457 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
ea4a5ff8
ZX		 458 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
459 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
460
461 void (*tlb_flush)(struct kvm_vcpu *vcpu);
ea4a5ff8 462
ea4a5ff8
ZX		 463 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
464 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
465 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
466 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
467 unsigned char *hypercall_addr);
468 int (*get_irq)(struct kvm_vcpu *vcpu);
469 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
298101da
AK		 470 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
471 bool has_error_code, u32 error_code);
472 bool (*exception_injected)(struct kvm_vcpu *vcpu);
ea4a5ff8
ZX		 473 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
474 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
475 struct kvm_run *run);
476
477 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
67253af5 478 int (*get_tdp_level)(void);
ea4a5ff8
ZX		 479};
480
97896d04
ZX		 481extern struct kvm_x86_ops *kvm_x86_ops;
482
54f1585a
ZX		 483int kvm_mmu_module_init(void);
484void kvm_mmu_module_exit(void);
485
486void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
487int kvm_mmu_create(struct kvm_vcpu *vcpu);
488int kvm_mmu_setup(struct kvm_vcpu *vcpu);
489void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
7b52345e
SY		 490void kvm_mmu_set_base_ptes(u64 base_pte);
491void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
492 u64 dirty_mask, u64 nx_mask, u64 x_mask);
54f1585a
ZX		 493
494int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
495void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
496void kvm_mmu_zap_all(struct kvm *kvm);
3ad82a7e 497unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
54f1585a
ZX		 498void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
499
cc4b6871
JR		 500int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
501
3200f405 502int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
9f811285 503 const void *val, int bytes);
2f333bcb
MT		 504int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
505 gpa_t addr, unsigned long *ret);
506
507extern bool tdp_enabled;
9f811285 508
54f1585a
ZX		 509enum emulation_result {
510 EMULATE_DONE, /* no further processing */
511 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
512 EMULATE_FAIL, /* can't emulate this instruction */
513};
514
571008da
SY		 515#define EMULTYPE_NO_DECODE (1 << 0)
516#define EMULTYPE_TRAP_UD (1 << 1)
54f1585a 517int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
571008da 518 unsigned long cr2, u16 error_code, int emulation_type);
54f1585a
ZX		 519void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
520void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
521void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
522void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
523 unsigned long *rflags);
524
525unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
526void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
527 unsigned long *rflags);
f2b4b7dd 528void kvm_enable_efer_bits(u64);
54f1585a
ZX		 529int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
530int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
531
532struct x86_emulate_ctxt;
533
534int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
535 int size, unsigned port);
536int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
537 int size, unsigned long count, int down,
538 gva_t address, int rep, unsigned port);
539void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
540int kvm_emulate_halt(struct kvm_vcpu *vcpu);
541int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
542int emulate_clts(struct kvm_vcpu *vcpu);
543int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
544 unsigned long *dest);
545int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
546 unsigned long value);
547
3e6e0aab
GT		 548void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
549int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
550 int type_bits, int seg);
551
37817f29
IE		 552int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
553
2d3ad1f4 554void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
9c20456a
JR		 555void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
556void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
557void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
2d3ad1f4
AK		 558unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
559void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
54f1585a
ZX		 560void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
561
562int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
563int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
564
298101da
AK		 565void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
566void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
c3c91fee
AK		 567void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
568 u32 error_code);
298101da 569
3419ffc8
SY		 570void kvm_inject_nmi(struct kvm_vcpu *vcpu);
571
54f1585a
ZX		 572void fx_init(struct kvm_vcpu *vcpu);
573
574int emulator_read_std(unsigned long addr,
575 void *val,
576 unsigned int bytes,
577 struct kvm_vcpu *vcpu);
578int emulator_write_emulated(unsigned long addr,
579 const void *val,
580 unsigned int bytes,
581 struct kvm_vcpu *vcpu);
582
583unsigned long segment_base(u16 selector);
584
d835dfec 585void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
54f1585a
ZX		 586void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
587 const u8 *new, int bytes);
588int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
589void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
590int kvm_mmu_load(struct kvm_vcpu *vcpu);
591void kvm_mmu_unload(struct kvm_vcpu *vcpu);
592
593int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
594
595int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
596
3067714c 597int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
34c16eec 598
18552672 599void kvm_enable_tdp(void);
5f4cb662 600void kvm_disable_tdp(void);
18552672 601
a03490ed 602int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
de7d789a 603int complete_pio(struct kvm_vcpu *vcpu);
ec6d273d
ZX		 604
605static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
606{
607 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
608
609 return (struct kvm_mmu_page *)page_private(page);
610}
611
d6e88aec 612static inline u16 kvm_read_fs(void)
ec6d273d
ZX		 613{
614 u16 seg;
615 asm("mov %%fs, %0" : "=g"(seg));
616 return seg;
617}
618
d6e88aec 619static inline u16 kvm_read_gs(void)
ec6d273d
ZX		 620{
621 u16 seg;
622 asm("mov %%gs, %0" : "=g"(seg));
623 return seg;
624}
625
d6e88aec 626static inline u16 kvm_read_ldt(void)
ec6d273d
ZX		 627{
628 u16 ldt;
629 asm("sldt %0" : "=g"(ldt));
630 return ldt;
631}
632
d6e88aec 633static inline void kvm_load_fs(u16 sel)
ec6d273d
ZX		 634{
635 asm("mov %0, %%fs" : : "rm"(sel));
636}
637
d6e88aec 638static inline void kvm_load_gs(u16 sel)
ec6d273d
ZX		 639{
640 asm("mov %0, %%gs" : : "rm"(sel));
641}
642
d6e88aec 643static inline void kvm_load_ldt(u16 sel)
ec6d273d
ZX		 644{
645 asm("lldt %0" : : "rm"(sel));
646}
ec6d273d 647
d6e88aec 648static inline void kvm_get_idt(struct descriptor_table *table)
ec6d273d
ZX		 649{
650 asm("sidt %0" : "=m"(*table));
651}
652
d6e88aec 653static inline void kvm_get_gdt(struct descriptor_table *table)
ec6d273d
ZX		 654{
655 asm("sgdt %0" : "=m"(*table));
656}
657
d6e88aec 658static inline unsigned long kvm_read_tr_base(void)
ec6d273d
ZX		 659{
660 u16 tr;
661 asm("str %0" : "=g"(tr));
662 return segment_base(tr);
663}
664
665#ifdef CONFIG_X86_64
666static inline unsigned long read_msr(unsigned long msr)
667{
668 u64 value;
669
670 rdmsrl(msr, value);
671 return value;
672}
673#endif
674
d6e88aec 675static inline void kvm_fx_save(struct i387_fxsave_struct *image)
ec6d273d
ZX		 676{
677 asm("fxsave (%0)":: "r" (image));
678}
679
d6e88aec 680static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
ec6d273d
ZX		 681{
682 asm("fxrstor (%0)":: "r" (image));
683}
684
d6e88aec 685static inline void kvm_fx_finit(void)
ec6d273d
ZX		 686{
687 asm("finit");
688}
689
690static inline u32 get_rdx_init_val(void)
691{
692 return 0x600; /* P6 family */
693}
694
c1a5d4f9
AK		 695static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
696{
697 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
698}
699
ec6d273d
ZX		 700#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
701#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
702#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
703#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
704#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
705#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
706#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
707#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
708#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
1439442c 709#define ASM_VMX_INVEPT ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
2384d2b3 710#define ASM_VMX_INVVPID ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
ec6d273d
ZX		 711
712#define MSR_IA32_TIME_STAMP_COUNTER 0x010
713
714#define TSS_IOPB_BASE_OFFSET 0x66
715#define TSS_BASE_SIZE 0x68
716#define TSS_IOPB_SIZE (65536 / 8)
717#define TSS_REDIRECTION_SIZE (256 / 8)
7d76b4d3
JP		 718#define RMODE_TSS_SIZE \
719 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
53e0aa7b 720
37817f29
IE		 721enum {
722 TASK_SWITCH_CALL = 0,
723 TASK_SWITCH_IRET = 1,
724 TASK_SWITCH_JMP = 2,
725 TASK_SWITCH_GATE = 3,
726};
727
2714d1d3 728
4ecac3fd 729#ifdef CONFIG_64BIT
33a37eb4
IM		 730# define KVM_EX_ENTRY ".quad"
731# define KVM_EX_PUSH "pushq"
4ecac3fd 732#else
33a37eb4
IM		 733# define KVM_EX_ENTRY ".long"
734# define KVM_EX_PUSH "pushl"
4ecac3fd
AK		 735#endif
736
737/*
738 * Hardware virtualization extension instructions may fault if a
739 * reboot turns off virtualization while processes are running.
740 * Trap the fault and ignore the instruction if that happens.
741 */
742asmlinkage void kvm_handle_fault_on_reboot(void);
743
744#define __kvm_handle_fault_on_reboot(insn) \
745 "666: " insn "\n\t" \
18b13e54 746 ".pushsection .fixup, \"ax\" \n" \
4ecac3fd 747 "667: \n\t" \
33a37eb4 748 KVM_EX_PUSH " $666b \n\t" \
4ecac3fd
AK		 749 "jmp kvm_handle_fault_on_reboot \n\t" \
750 ".popsection \n\t" \
751 ".pushsection __ex_table, \"a\" \n\t" \
752 KVM_EX_ENTRY " 666b, 667b \n\t" \
753 ".popsection"
754
e930bffe
AA		 755#define KVM_ARCH_WANT_MMU_NOTIFIER
756int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
757int kvm_age_hva(struct kvm *kvm, unsigned long hva);
758
77ef50a5 759#endif /* ASM_X86__KVM_HOST_H */
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