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KVM: MMU: Make flooding detection work when guest page faults are bypassed
[deliverable/linux.git] / drivers / kvm / kvm.h
CommitLineData
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>
15ad7146 16#include <linux/preempt.h>
e8edc6e0 17#include <asm/signal.h>
6aa8b732 18
6aa8b732 19#include <linux/kvm.h>
102d8325 20#include <linux/kvm_para.h>
6aa8b732 21
f802a307
RR		 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)
6aa8b732 25
6aa8b732 26#define KVM_GUEST_CR0_MASK \
707d92fa
RR		 27 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
28 | X86_CR0_NW | X86_CR0_CD)
6aa8b732 29#define KVM_VM_CR0_ALWAYS_ON \
707d92fa
RR		 30 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
31 | X86_CR0_MP)
6aa8b732 32#define KVM_GUEST_CR4_MASK \
66aee91a
RR		 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)
6aa8b732
AK		 36
37#define INVALID_PAGE (~(hpa_t)0)
38#define UNMAPPED_GVA (~(gpa_t)0)
39
ef9254df 40#define KVM_MAX_VCPUS 4
e8207547 41#define KVM_ALIAS_SLOTS 4
2e2c618d 42#define KVM_MEMORY_SLOTS 8
7494c0cc 43#define KVM_NUM_MMU_PAGES 1024
ebeace86
AK		 44#define KVM_MIN_FREE_MMU_PAGES 5
45#define KVM_REFILL_PAGES 25
06465c5a 46#define KVM_MAX_CPUID_ENTRIES 40
6aa8b732 47
6aa8b732 48#define DE_VECTOR 0
7aa81cc0 49#define UD_VECTOR 6
7807fa6c 50#define NM_VECTOR 7
6aa8b732
AK		 51#define DF_VECTOR 8
52#define TS_VECTOR 10
53#define NP_VECTOR 11
54#define SS_VECTOR 12
55#define GP_VECTOR 13
56#define PF_VECTOR 14
57
58#define SELECTOR_TI_MASK (1 << 2)
59#define SELECTOR_RPL_MASK 0x03
60
61#define IOPL_SHIFT 12
62
039576c0
AK		 63#define KVM_PIO_PAGE_OFFSET 1
64
d9e368d6
AK		 65/*
66 * vcpu->requests bit members
67 */
68#define KVM_TLB_FLUSH 0
69
6aa8b732
AK		 70/*
71 * Address types:
72 *
73 * gva - guest virtual address
74 * gpa - guest physical address
75 * gfn - guest frame number
76 * hva - host virtual address
77 * hpa - host physical address
78 * hfn - host frame number
79 */
80
81typedef unsigned long gva_t;
82typedef u64 gpa_t;
83typedef unsigned long gfn_t;
84
85typedef unsigned long hva_t;
86typedef u64 hpa_t;
87typedef unsigned long hfn_t;
88
cea0f0e7
AK		 89#define NR_PTE_CHAIN_ENTRIES 5
90
91struct kvm_pte_chain {
92 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
93 struct hlist_node link;
94};
95
96/*
97 * kvm_mmu_page_role, below, is defined as:
98 *
99 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
100 * bits 4:7 - page table level for this shadow (1-4)
101 * bits 8:9 - page table quadrant for 2-level guests
102 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
d55e2cb2 103 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
cea0f0e7
AK		 104 */
105union kvm_mmu_page_role {
106 unsigned word;
107 struct {
108 unsigned glevels : 4;
109 unsigned level : 4;
110 unsigned quadrant : 2;
111 unsigned pad_for_nice_hex_output : 6;
112 unsigned metaphysical : 1;
d55e2cb2 113 unsigned hugepage_access : 3;
cea0f0e7
AK		 114 };
115};
116
6aa8b732
AK		 117struct kvm_mmu_page {
118 struct list_head link;
cea0f0e7
AK		 119 struct hlist_node hash_link;
120
121 /*
122 * The following two entries are used to key the shadow page in the
123 * hash table.
124 */
125 gfn_t gfn;
126 union kvm_mmu_page_role role;
127
47ad8e68 128 u64 *spt;
6aa8b732
AK		 129 unsigned long slot_bitmap; /* One bit set per slot which has memory
130 * in this shadow page.
131 */
cea0f0e7 132 int multimapped; /* More than one parent_pte? */
3bb65a22 133 int root_count; /* Currently serving as active root */
cea0f0e7
AK		 134 union {
135 u64 *parent_pte; /* !multimapped */
136 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
137 };
6aa8b732
AK		 138};
139
6aa8b732 140struct kvm_vcpu;
c16f862d 141extern struct kmem_cache *kvm_vcpu_cache;
6aa8b732
AK		 142
143/*
144 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
145 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
146 * mode.
147 */
148struct kvm_mmu {
149 void (*new_cr3)(struct kvm_vcpu *vcpu);
150 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
6aa8b732
AK		 151 void (*free)(struct kvm_vcpu *vcpu);
152 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
c7addb90
AK		 153 void (*prefetch_page)(struct kvm_vcpu *vcpu,
154 struct kvm_mmu_page *page);
6aa8b732
AK		 155 hpa_t root_hpa;
156 int root_level;
157 int shadow_root_level;
17ac10ad
AK		 158
159 u64 *pae_root;
6aa8b732
AK		 160};
161
714b93da
AK		 162#define KVM_NR_MEM_OBJS 20
163
164struct kvm_mmu_memory_cache {
165 int nobjs;
166 void *objects[KVM_NR_MEM_OBJS];
167};
168
169/*
170 * We don't want allocation failures within the mmu code, so we preallocate
171 * enough memory for a single page fault in a cache.
172 */
6aa8b732
AK		 173struct kvm_guest_debug {
174 int enabled;
175 unsigned long bp[4];
176 int singlestep;
177};
178
179enum {
180 VCPU_REGS_RAX = 0,
181 VCPU_REGS_RCX = 1,
182 VCPU_REGS_RDX = 2,
183 VCPU_REGS_RBX = 3,
184 VCPU_REGS_RSP = 4,
185 VCPU_REGS_RBP = 5,
186 VCPU_REGS_RSI = 6,
187 VCPU_REGS_RDI = 7,
05b3e0c2 188#ifdef CONFIG_X86_64
6aa8b732
AK		 189 VCPU_REGS_R8 = 8,
190 VCPU_REGS_R9 = 9,
191 VCPU_REGS_R10 = 10,
192 VCPU_REGS_R11 = 11,
193 VCPU_REGS_R12 = 12,
194 VCPU_REGS_R13 = 13,
195 VCPU_REGS_R14 = 14,
196 VCPU_REGS_R15 = 15,
197#endif
198 NR_VCPU_REGS
199};
200
201enum {
202 VCPU_SREG_CS,
203 VCPU_SREG_DS,
204 VCPU_SREG_ES,
205 VCPU_SREG_FS,
206 VCPU_SREG_GS,
207 VCPU_SREG_SS,
208 VCPU_SREG_TR,
209 VCPU_SREG_LDTR,
210};
211
3427318f
LV		 212#include "x86_emulate.h"
213
039576c0
AK		 214struct kvm_pio_request {
215 unsigned long count;
216 int cur_count;
217 struct page *guest_pages[2];
218 unsigned guest_page_offset;
219 int in;
74906345 220 int port;
039576c0
AK		 221 int size;
222 int string;
223 int down;
224 int rep;
225};
226
1165f5fe
AK		 227struct kvm_stat {
228 u32 pf_fixed;
229 u32 pf_guest;
230 u32 tlb_flush;
231 u32 invlpg;
232
233 u32 exits;
234 u32 io_exits;
235 u32 mmio_exits;
236 u32 signal_exits;
237 u32 irq_window_exits;
238 u32 halt_exits;
b6958ce4 239 u32 halt_wakeup;
1165f5fe
AK		 240 u32 request_irq_exits;
241 u32 irq_exits;
e6adf283 242 u32 light_exits;
2cc51560 243 u32 efer_reload;
1165f5fe
AK		 244};
245
2eeb2e94
GH		 246struct kvm_io_device {
247 void (*read)(struct kvm_io_device *this,
248 gpa_t addr,
249 int len,
250 void *val);
251 void (*write)(struct kvm_io_device *this,
252 gpa_t addr,
253 int len,
254 const void *val);
255 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
256 void (*destructor)(struct kvm_io_device *this);
257
258 void *private;
259};
260
261static inline void kvm_iodevice_read(struct kvm_io_device *dev,
262 gpa_t addr,
263 int len,
264 void *val)
265{
266 dev->read(dev, addr, len, val);
267}
268
269static inline void kvm_iodevice_write(struct kvm_io_device *dev,
270 gpa_t addr,
271 int len,
272 const void *val)
273{
274 dev->write(dev, addr, len, val);
275}
276
277static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
278{
279 return dev->in_range(dev, addr);
280}
281
282static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
283{
74906345
ED		 284 if (dev->destructor)
285 dev->destructor(dev);
2eeb2e94
GH		 286}
287
288/*
289 * It would be nice to use something smarter than a linear search, TBD...
290 * Thankfully we dont expect many devices to register (famous last words :),
291 * so until then it will suffice. At least its abstracted so we can change
292 * in one place.
293 */
294struct kvm_io_bus {
295 int dev_count;
296#define NR_IOBUS_DEVS 6
297 struct kvm_io_device *devs[NR_IOBUS_DEVS];
298};
299
300void kvm_io_bus_init(struct kvm_io_bus *bus);
301void kvm_io_bus_destroy(struct kvm_io_bus *bus);
302struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
303void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
304 struct kvm_io_device *dev);
305
6aa8b732
AK		 306struct kvm_vcpu {
307 struct kvm *kvm;
15ad7146 308 struct preempt_notifier preempt_notifier;
dad3795d 309 int vcpu_id;
6aa8b732
AK		 310 struct mutex mutex;
311 int cpu;
0cc5064d 312 u64 host_tsc;
9a2bb7f4 313 struct kvm_run *run;
c1150d8c 314 int interrupt_window_open;
d9e368d6
AK		 315 int guest_mode;
316 unsigned long requests;
6aa8b732 317 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
9eb829ce 318 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
6aa8b732
AK		 319 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
320 unsigned long rip; /* needs vcpu_load_rsp_rip() */
321
322 unsigned long cr0;
323 unsigned long cr2;
324 unsigned long cr3;
325 unsigned long cr4;
326 unsigned long cr8;
1342d353 327 u64 pdptrs[4]; /* pae */
6aa8b732
AK		 328 u64 shadow_efer;
329 u64 apic_base;
97222cc8 330 struct kvm_lapic *apic; /* kernel irqchip context */
c5ec1534
HQ		 331#define VCPU_MP_STATE_RUNNABLE 0
332#define VCPU_MP_STATE_UNINITIALIZED 1
333#define VCPU_MP_STATE_INIT_RECEIVED 2
334#define VCPU_MP_STATE_SIPI_RECEIVED 3
335#define VCPU_MP_STATE_HALTED 4
336 int mp_state;
337 int sipi_vector;
6f00e68f 338 u64 ia32_misc_enable_msr;
6aa8b732 339
6aa8b732
AK		 340 struct kvm_mmu mmu;
341
714b93da
AK		 342 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
343 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
d3d25b04
AK		 344 struct kvm_mmu_memory_cache mmu_page_cache;
345 struct kvm_mmu_memory_cache mmu_page_header_cache;
714b93da 346
86a5ba02
AK		 347 gfn_t last_pt_write_gfn;
348 int last_pt_write_count;
12b7d28f 349 u64 *last_pte_updated;
86a5ba02 350
6aa8b732
AK		 351 struct kvm_guest_debug guest_debug;
352
b114b080
RR		 353 struct i387_fxsave_struct host_fx_image;
354 struct i387_fxsave_struct guest_fx_image;
7807fa6c 355 int fpu_active;
7702fd1f 356 int guest_fpu_loaded;
6aa8b732
AK		 357
358 int mmio_needed;
359 int mmio_read_completed;
360 int mmio_is_write;
361 int mmio_size;
362 unsigned char mmio_data[8];
363 gpa_t mmio_phys_addr;
e7df56e4 364 gva_t mmio_fault_cr2;
039576c0
AK		 365 struct kvm_pio_request pio;
366 void *pio_data;
b6958ce4 367 wait_queue_head_t wq;
6aa8b732 368
1961d276
AK		 369 int sigset_active;
370 sigset_t sigset;
371
1165f5fe
AK		 372 struct kvm_stat stat;
373
6aa8b732
AK		 374 struct {
375 int active;
376 u8 save_iopl;
377 struct kvm_save_segment {
378 u16 selector;
379 unsigned long base;
380 u32 limit;
381 u32 ar;
382 } tr, es, ds, fs, gs;
383 } rmode;
72d6e5a0 384 int halt_request; /* real mode on Intel only */
06465c5a
AK		 385
386 int cpuid_nent;
387 struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
3427318f
LV		 388
389 /* emulate context */
390
391 struct x86_emulate_ctxt emulate_ctxt;
6aa8b732
AK		 392};
393
e8207547
AK		 394struct kvm_mem_alias {
395 gfn_t base_gfn;
396 unsigned long npages;
397 gfn_t target_gfn;
398};
399
6aa8b732
AK		 400struct kvm_memory_slot {
401 gfn_t base_gfn;
402 unsigned long npages;
403 unsigned long flags;
404 struct page **phys_mem;
405 unsigned long *dirty_bitmap;
406};
407
408struct kvm {
11ec2804 409 struct mutex lock; /* protects everything except vcpus */
e8207547
AK		 410 int naliases;
411 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
6aa8b732
AK		 412 int nmemslots;
413 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
cea0f0e7
AK		 414 /*
415 * Hash table of struct kvm_mmu_page.
416 */
6aa8b732 417 struct list_head active_mmu_pages;
ebeace86 418 int n_free_mmu_pages;
cea0f0e7 419 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
fb3f0f51 420 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
cd4a4e53 421 unsigned long rmap_overflow;
133de902 422 struct list_head vm_list;
bccf2150 423 struct file *filp;
2eeb2e94 424 struct kvm_io_bus mmio_bus;
74906345 425 struct kvm_io_bus pio_bus;
85f455f7 426 struct kvm_pic *vpic;
1fd4f2a5 427 struct kvm_ioapic *vioapic;
932f72ad 428 int round_robin_prev_vcpu;
6aa8b732
AK		 429};
430
85f455f7
ED		 431static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
432{
433 return kvm->vpic;
434}
435
1fd4f2a5
ED		 436static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
437{
438 return kvm->vioapic;
439}
440
85f455f7
ED		 441static inline int irqchip_in_kernel(struct kvm *kvm)
442{
443 return pic_irqchip(kvm) != 0;
444}
445
6aa8b732
AK		 446struct descriptor_table {
447 u16 limit;
448 unsigned long base;
449} __attribute__((packed));
450
cbdd1bea 451struct kvm_x86_ops {
6aa8b732
AK		 452 int (*cpu_has_kvm_support)(void); /* __init */
453 int (*disabled_by_bios)(void); /* __init */
454 void (*hardware_enable)(void *dummy); /* __init */
455 void (*hardware_disable)(void *dummy);
002c7f7c 456 void (*check_processor_compatibility)(void *rtn);
6aa8b732
AK		 457 int (*hardware_setup)(void); /* __init */
458 void (*hardware_unsetup)(void); /* __exit */
459
fb3f0f51
RR		 460 /* Create, but do not attach this VCPU */
461 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
6aa8b732 462 void (*vcpu_free)(struct kvm_vcpu *vcpu);
04d2cc77 463 void (*vcpu_reset)(struct kvm_vcpu *vcpu);
6aa8b732 464
04d2cc77 465 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
15ad7146 466 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
6aa8b732 467 void (*vcpu_put)(struct kvm_vcpu *vcpu);
774c47f1 468 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
6aa8b732
AK		 469
470 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
471 struct kvm_debug_guest *dbg);
04d2cc77 472 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
6aa8b732
AK		 473 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
474 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
475 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
476 void (*get_segment)(struct kvm_vcpu *vcpu,
477 struct kvm_segment *var, int seg);
478 void (*set_segment)(struct kvm_vcpu *vcpu,
479 struct kvm_segment *var, int seg);
6aa8b732 480 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
25c4c276 481 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
6aa8b732 482 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
6aa8b732
AK		 483 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
484 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
485 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
486 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
487 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
488 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
489 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
490 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
491 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
492 int *exception);
493 void (*cache_regs)(struct kvm_vcpu *vcpu);
494 void (*decache_regs)(struct kvm_vcpu *vcpu);
495 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
496 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
497
6aa8b732
AK		 498 void (*tlb_flush)(struct kvm_vcpu *vcpu);
499 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
500 unsigned long addr, u32 err_code);
501
502 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
503
04d2cc77
AK		 504 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
505 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
6aa8b732 506 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
102d8325
IM		 507 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
508 unsigned char *hypercall_addr);
2a8067f1
ED		 509 int (*get_irq)(struct kvm_vcpu *vcpu);
510 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
04d2cc77
AK		 511 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
512 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
513 struct kvm_run *run);
6aa8b732
AK		 514};
515
cbdd1bea 516extern struct kvm_x86_ops *kvm_x86_ops;
6aa8b732 517
f0242478
RR		 518/* The guest did something we don't support. */
519#define pr_unimpl(vcpu, fmt, ...) \
520 do { \
521 if (printk_ratelimit()) \
522 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
523 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
524 } while(0)
525
6aa8b732
AK		 526#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
527#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
528
fb3f0f51
RR		 529int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
530void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
531
cbdd1bea 532int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
c16f862d 533 struct module *module);
cbdd1bea 534void kvm_exit_x86(void);
6aa8b732 535
b5a33a75
AK		 536int kvm_mmu_module_init(void);
537void kvm_mmu_module_exit(void);
538
6aa8b732 539void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
8018c27b
IM		 540int kvm_mmu_create(struct kvm_vcpu *vcpu);
541int kvm_mmu_setup(struct kvm_vcpu *vcpu);
c7addb90 542void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
6aa8b732
AK		 543
544int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
90cb0529
AK		 545void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
546void kvm_mmu_zap_all(struct kvm *kvm);
6aa8b732
AK		 547
548hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
549#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
550#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
551static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
552hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
039576c0 553struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
6aa8b732 554
6aa8b732
AK		 555extern hpa_t bad_page_address;
556
954bbbc2 557struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
6aa8b732
AK		 558struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
559void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
560
561enum emulation_result {
562 EMULATE_DONE, /* no further processing */
563 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
564 EMULATE_FAIL, /* can't emulate this instruction */
565};
566
567int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
3427318f 568 unsigned long cr2, u16 error_code, int no_decode);
054b1369 569void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
6aa8b732
AK		 570void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
571void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
572void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
573 unsigned long *rflags);
574
575unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
576void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
577 unsigned long *rflags);
35f3f286
AK		 578int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
579int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
6aa8b732
AK		 580
581struct x86_emulate_ctxt;
582
3090dd73
LV		 583int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
584 int size, unsigned port);
585int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
586 int size, unsigned long count, int down,
587 gva_t address, int rep, unsigned port);
06465c5a 588void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
d3bef15f 589int kvm_emulate_halt(struct kvm_vcpu *vcpu);
6aa8b732
AK		 590int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
591int emulate_clts(struct kvm_vcpu *vcpu);
592int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
593 unsigned long *dest);
594int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
595 unsigned long value);
596
597void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
598void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
599void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
600void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
7017fc3d 601unsigned long get_cr8(struct kvm_vcpu *vcpu);
6aa8b732 602void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
1747fb71 603void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
6aa8b732 604
3bab1f5d
AK		 605int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
606int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
6aa8b732
AK		 607
608void fx_init(struct kvm_vcpu *vcpu);
609
6aa8b732 610void kvm_resched(struct kvm_vcpu *vcpu);
7702fd1f
AK		 611void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
612void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
d9e368d6 613void kvm_flush_remote_tlbs(struct kvm *kvm);
6aa8b732 614
e7d5d76c
LV		 615int emulator_read_std(unsigned long addr,
616 void *val,
617 unsigned int bytes,
618 struct kvm_vcpu *vcpu);
619int emulator_write_emulated(unsigned long addr,
620 const void *val,
621 unsigned int bytes,
622 struct kvm_vcpu *vcpu);
6aa8b732
AK		 623
624unsigned long segment_base(u16 selector);
625
09072daf 626void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
fe551881 627 const u8 *new, int bytes);
a436036b 628int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
22d95b12 629void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
17c3ba9d
AK		 630int kvm_mmu_load(struct kvm_vcpu *vcpu);
631void kvm_mmu_unload(struct kvm_vcpu *vcpu);
ebeace86 632
7aa81cc0
AL		 633int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
634
635int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
270fd9b9 636
d172fcd3
LV		 637static inline void kvm_guest_enter(void)
638{
639 current->flags |= PF_VCPU;
640}
641
642static inline void kvm_guest_exit(void)
643{
644 current->flags &= ~PF_VCPU;
645}
646
ebeace86
AK		 647static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
648 u32 error_code)
649{
ebeace86
AK		 650 return vcpu->mmu.page_fault(vcpu, gva, error_code);
651}
da4a00f0 652
22d95b12
AK		 653static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
654{
655 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
656 __kvm_mmu_free_some_pages(vcpu);
657}
658
17c3ba9d
AK		 659static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
660{
661 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
662 return 0;
663
664 return kvm_mmu_load(vcpu);
665}
666
a9058ecd
AK		 667static inline int is_long_mode(struct kvm_vcpu *vcpu)
668{
669#ifdef CONFIG_X86_64
670 return vcpu->shadow_efer & EFER_LME;
671#else
672 return 0;
673#endif
674}
675
6aa8b732
AK		 676static inline int is_pae(struct kvm_vcpu *vcpu)
677{
66aee91a 678 return vcpu->cr4 & X86_CR4_PAE;
6aa8b732
AK		 679}
680
681static inline int is_pse(struct kvm_vcpu *vcpu)
682{
66aee91a 683 return vcpu->cr4 & X86_CR4_PSE;
6aa8b732
AK		 684}
685
686static inline int is_paging(struct kvm_vcpu *vcpu)
687{
707d92fa 688 return vcpu->cr0 & X86_CR0_PG;
6aa8b732
AK		 689}
690
691static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
692{
693 return slot - kvm->memslots;
694}
695
696static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
697{
698 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
699
5972e953 700 return (struct kvm_mmu_page *)page_private(page);
6aa8b732
AK		 701}
702
703static inline u16 read_fs(void)
704{
705 u16 seg;
706 asm ("mov %%fs, %0" : "=g"(seg));
707 return seg;
708}
709
710static inline u16 read_gs(void)
711{
712 u16 seg;
713 asm ("mov %%gs, %0" : "=g"(seg));
714 return seg;
715}
716
717static inline u16 read_ldt(void)
718{
719 u16 ldt;
720 asm ("sldt %0" : "=g"(ldt));
721 return ldt;
722}
723
724static inline void load_fs(u16 sel)
725{
726 asm ("mov %0, %%fs" : : "rm"(sel));
727}
728
729static inline void load_gs(u16 sel)
730{
731 asm ("mov %0, %%gs" : : "rm"(sel));
732}
733
734#ifndef load_ldt
735static inline void load_ldt(u16 sel)
736{
a0610ddf 737 asm ("lldt %0" : : "rm"(sel));
6aa8b732
AK		 738}
739#endif
740
741static inline void get_idt(struct descriptor_table *table)
742{
743 asm ("sidt %0" : "=m"(*table));
744}
745
746static inline void get_gdt(struct descriptor_table *table)
747{
748 asm ("sgdt %0" : "=m"(*table));
749}
750
751static inline unsigned long read_tr_base(void)
752{
753 u16 tr;
754 asm ("str %0" : "=g"(tr));
755 return segment_base(tr);
756}
757
05b3e0c2 758#ifdef CONFIG_X86_64
6aa8b732
AK		 759static inline unsigned long read_msr(unsigned long msr)
760{
761 u64 value;
762
763 rdmsrl(msr, value);
764 return value;
765}
766#endif
767
b114b080 768static inline void fx_save(struct i387_fxsave_struct *image)
6aa8b732
AK		 769{
770 asm ("fxsave (%0)":: "r" (image));
771}
772
b114b080 773static inline void fx_restore(struct i387_fxsave_struct *image)
6aa8b732
AK		 774{
775 asm ("fxrstor (%0)":: "r" (image));
776}
777
778static inline void fpu_init(void)
779{
780 asm ("finit");
781}
782
783static inline u32 get_rdx_init_val(void)
784{
785 return 0x600; /* P6 family */
786}
787
788#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
789#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
790#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
791#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
792#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
793#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
794#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
795#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
796#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
797
798#define MSR_IA32_TIME_STAMP_COUNTER 0x010
799
800#define TSS_IOPB_BASE_OFFSET 0x66
801#define TSS_BASE_SIZE 0x68
802#define TSS_IOPB_SIZE (65536 / 8)
803#define TSS_REDIRECTION_SIZE (256 / 8)
804#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
805
6aa8b732 806#endif
Linux kernel - Deliverables
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