projects / linux-block.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
KVM: Portability: Add two hooks to handle kvm_create and destroy vm
[linux-block.git] / drivers / kvm / kvm.h
... / ...
CommitLineData
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/hardirq.h>
11#include <linux/list.h>
12#include <linux/mutex.h>
13#include <linux/spinlock.h>
14#include <linux/signal.h>
15#include <linux/sched.h>
16#include <linux/mm.h>
17#include <linux/preempt.h>
18#include <asm/signal.h>
19
20#include <linux/kvm.h>
21#include <linux/kvm_para.h>
22
23#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
24#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
25#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
26
27#define KVM_GUEST_CR0_MASK \
28 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
29 | X86_CR0_NW | X86_CR0_CD)
30#define KVM_VM_CR0_ALWAYS_ON \
31 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
32 | X86_CR0_MP)
33#define KVM_GUEST_CR4_MASK \
34 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
35#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
36#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
37
38#define INVALID_PAGE (~(hpa_t)0)
39#define UNMAPPED_GVA (~(gpa_t)0)
40
41#define KVM_MAX_VCPUS 4
42#define KVM_ALIAS_SLOTS 4
43#define KVM_MEMORY_SLOTS 8
44/* memory slots that does not exposed to userspace */
45#define KVM_PRIVATE_MEM_SLOTS 4
46#define KVM_PERMILLE_MMU_PAGES 20
47#define KVM_MIN_ALLOC_MMU_PAGES 64
48#define KVM_NUM_MMU_PAGES 1024
49#define KVM_MIN_FREE_MMU_PAGES 5
50#define KVM_REFILL_PAGES 25
51#define KVM_MAX_CPUID_ENTRIES 40
52
53#define DE_VECTOR 0
54#define UD_VECTOR 6
55#define NM_VECTOR 7
56#define DF_VECTOR 8
57#define TS_VECTOR 10
58#define NP_VECTOR 11
59#define SS_VECTOR 12
60#define GP_VECTOR 13
61#define PF_VECTOR 14
62
63#define SELECTOR_TI_MASK (1 << 2)
64#define SELECTOR_RPL_MASK 0x03
65
66#define IOPL_SHIFT 12
67
68#define KVM_PIO_PAGE_OFFSET 1
69
70/*
71 * vcpu->requests bit members
72 */
73#define KVM_REQ_TLB_FLUSH 0
74
75/*
76 * Address types:
77 *
78 * gva - guest virtual address
79 * gpa - guest physical address
80 * gfn - guest frame number
81 * hva - host virtual address
82 * hpa - host physical address
83 * hfn - host frame number
84 */
85
86typedef unsigned long gva_t;
87typedef u64 gpa_t;
88typedef unsigned long gfn_t;
89
90typedef unsigned long hva_t;
91typedef u64 hpa_t;
92typedef unsigned long hfn_t;
93
94#define NR_PTE_CHAIN_ENTRIES 5
95
96struct kvm_pte_chain {
97 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
98 struct hlist_node link;
99};
100
101/*
102 * kvm_mmu_page_role, below, is defined as:
103 *
104 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
105 * bits 4:7 - page table level for this shadow (1-4)
106 * bits 8:9 - page table quadrant for 2-level guests
107 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
108 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
109 */
110union kvm_mmu_page_role {
111 unsigned word;
112 struct {
113 unsigned glevels : 4;
114 unsigned level : 4;
115 unsigned quadrant : 2;
116 unsigned pad_for_nice_hex_output : 6;
117 unsigned metaphysical : 1;
118 unsigned hugepage_access : 3;
119 };
120};
121
122struct kvm_mmu_page {
123 struct list_head link;
124 struct hlist_node hash_link;
125
126 /*
127 * The following two entries are used to key the shadow page in the
128 * hash table.
129 */
130 gfn_t gfn;
131 union kvm_mmu_page_role role;
132
133 u64 *spt;
134 /* hold the gfn of each spte inside spt */
135 gfn_t *gfns;
136 unsigned long slot_bitmap; /* One bit set per slot which has memory
137 * in this shadow page.
138 */
139 int multimapped; /* More than one parent_pte? */
140 int root_count; /* Currently serving as active root */
141 union {
142 u64 *parent_pte; /* !multimapped */
143 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
144 };
145};
146
147struct kvm_vcpu;
148extern struct kmem_cache *kvm_vcpu_cache;
149
150/*
151 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
152 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
153 * mode.
154 */
155struct kvm_mmu {
156 void (*new_cr3)(struct kvm_vcpu *vcpu);
157 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
158 void (*free)(struct kvm_vcpu *vcpu);
159 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
160 void (*prefetch_page)(struct kvm_vcpu *vcpu,
161 struct kvm_mmu_page *page);
162 hpa_t root_hpa;
163 int root_level;
164 int shadow_root_level;
165
166 u64 *pae_root;
167};
168
169#define KVM_NR_MEM_OBJS 40
170
171struct kvm_mmu_memory_cache {
172 int nobjs;
173 void *objects[KVM_NR_MEM_OBJS];
174};
175
176/*
177 * We don't want allocation failures within the mmu code, so we preallocate
178 * enough memory for a single page fault in a cache.
179 */
180struct kvm_guest_debug {
181 int enabled;
182 unsigned long bp[4];
183 int singlestep;
184};
185
186enum {
187 VCPU_REGS_RAX = 0,
188 VCPU_REGS_RCX = 1,
189 VCPU_REGS_RDX = 2,
190 VCPU_REGS_RBX = 3,
191 VCPU_REGS_RSP = 4,
192 VCPU_REGS_RBP = 5,
193 VCPU_REGS_RSI = 6,
194 VCPU_REGS_RDI = 7,
195#ifdef CONFIG_X86_64
196 VCPU_REGS_R8 = 8,
197 VCPU_REGS_R9 = 9,
198 VCPU_REGS_R10 = 10,
199 VCPU_REGS_R11 = 11,
200 VCPU_REGS_R12 = 12,
201 VCPU_REGS_R13 = 13,
202 VCPU_REGS_R14 = 14,
203 VCPU_REGS_R15 = 15,
204#endif
205 NR_VCPU_REGS
206};
207
208enum {
209 VCPU_SREG_CS,
210 VCPU_SREG_DS,
211 VCPU_SREG_ES,
212 VCPU_SREG_FS,
213 VCPU_SREG_GS,
214 VCPU_SREG_SS,
215 VCPU_SREG_TR,
216 VCPU_SREG_LDTR,
217};
218
219#include "x86_emulate.h"
220
221struct kvm_pio_request {
222 unsigned long count;
223 int cur_count;
224 struct page *guest_pages[2];
225 unsigned guest_page_offset;
226 int in;
227 int port;
228 int size;
229 int string;
230 int down;
231 int rep;
232};
233
234struct kvm_stat {
235 u32 pf_fixed;
236 u32 pf_guest;
237 u32 tlb_flush;
238 u32 invlpg;
239
240 u32 exits;
241 u32 io_exits;
242 u32 mmio_exits;
243 u32 signal_exits;
244 u32 irq_window_exits;
245 u32 halt_exits;
246 u32 halt_wakeup;
247 u32 request_irq_exits;
248 u32 irq_exits;
249 u32 light_exits;
250 u32 efer_reload;
251};
252
253struct kvm_io_device {
254 void (*read)(struct kvm_io_device *this,
255 gpa_t addr,
256 int len,
257 void *val);
258 void (*write)(struct kvm_io_device *this,
259 gpa_t addr,
260 int len,
261 const void *val);
262 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
263 void (*destructor)(struct kvm_io_device *this);
264
265 void *private;
266};
267
268static inline void kvm_iodevice_read(struct kvm_io_device *dev,
269 gpa_t addr,
270 int len,
271 void *val)
272{
273 dev->read(dev, addr, len, val);
274}
275
276static inline void kvm_iodevice_write(struct kvm_io_device *dev,
277 gpa_t addr,
278 int len,
279 const void *val)
280{
281 dev->write(dev, addr, len, val);
282}
283
284static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
285{
286 return dev->in_range(dev, addr);
287}
288
289static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
290{
291 if (dev->destructor)
292 dev->destructor(dev);
293}
294
295/*
296 * It would be nice to use something smarter than a linear search, TBD...
297 * Thankfully we dont expect many devices to register (famous last words :),
298 * so until then it will suffice. At least its abstracted so we can change
299 * in one place.
300 */
301struct kvm_io_bus {
302 int dev_count;
303#define NR_IOBUS_DEVS 6
304 struct kvm_io_device *devs[NR_IOBUS_DEVS];
305};
306
307void kvm_io_bus_init(struct kvm_io_bus *bus);
308void kvm_io_bus_destroy(struct kvm_io_bus *bus);
309struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
310void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
311 struct kvm_io_device *dev);
312
313#ifdef CONFIG_HAS_IOMEM
314#define KVM_VCPU_MMIO \
315 int mmio_needed; \
316 int mmio_read_completed; \
317 int mmio_is_write; \
318 int mmio_size; \
319 unsigned char mmio_data[8]; \
320 gpa_t mmio_phys_addr;
321
322#else
323#define KVM_VCPU_MMIO
324
325#endif
326
327#define KVM_VCPU_COMM \
328 struct kvm *kvm; \
329 struct preempt_notifier preempt_notifier; \
330 int vcpu_id; \
331 struct mutex mutex; \
332 int cpu; \
333 struct kvm_run *run; \
334 int guest_mode; \
335 unsigned long requests; \
336 struct kvm_guest_debug guest_debug; \
337 int fpu_active; \
338 int guest_fpu_loaded; \
339 wait_queue_head_t wq; \
340 int sigset_active; \
341 sigset_t sigset; \
342 struct kvm_stat stat; \
343 KVM_VCPU_MMIO
344
345struct kvm_mem_alias {
346 gfn_t base_gfn;
347 unsigned long npages;
348 gfn_t target_gfn;
349};
350
351struct kvm_memory_slot {
352 gfn_t base_gfn;
353 unsigned long npages;
354 unsigned long flags;
355 unsigned long *rmap;
356 unsigned long *dirty_bitmap;
357 unsigned long userspace_addr;
358 int user_alloc;
359};
360
361struct kvm {
362 struct mutex lock; /* protects everything except vcpus */
363 int naliases;
364 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
365 int nmemslots;
366 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
367 KVM_PRIVATE_MEM_SLOTS];
368 /*
369 * Hash table of struct kvm_mmu_page.
370 */
371 struct list_head active_mmu_pages;
372 unsigned int n_free_mmu_pages;
373 unsigned int n_requested_mmu_pages;
374 unsigned int n_alloc_mmu_pages;
375 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
376 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
377 unsigned long rmap_overflow;
378 struct list_head vm_list;
379 struct file *filp;
380 struct kvm_io_bus mmio_bus;
381 struct kvm_io_bus pio_bus;
382 struct kvm_pic *vpic;
383 struct kvm_ioapic *vioapic;
384 int round_robin_prev_vcpu;
385 unsigned int tss_addr;
386 struct page *apic_access_page;
387};
388
389static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
390{
391 return kvm->vpic;
392}
393
394static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
395{
396 return kvm->vioapic;
397}
398
399static inline int irqchip_in_kernel(struct kvm *kvm)
400{
401 return pic_irqchip(kvm) != NULL;
402}
403
404struct descriptor_table {
405 u16 limit;
406 unsigned long base;
407} __attribute__((packed));
408
409struct kvm_x86_ops {
410 int (*cpu_has_kvm_support)(void); /* __init */
411 int (*disabled_by_bios)(void); /* __init */
412 void (*hardware_enable)(void *dummy); /* __init */
413 void (*hardware_disable)(void *dummy);
414 void (*check_processor_compatibility)(void *rtn);
415 int (*hardware_setup)(void); /* __init */
416 void (*hardware_unsetup)(void); /* __exit */
417
418 /* Create, but do not attach this VCPU */
419 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
420 void (*vcpu_free)(struct kvm_vcpu *vcpu);
421 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
422
423 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
424 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
425 void (*vcpu_put)(struct kvm_vcpu *vcpu);
426 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
427
428 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
429 struct kvm_debug_guest *dbg);
430 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
431 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
432 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
433 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
434 void (*get_segment)(struct kvm_vcpu *vcpu,
435 struct kvm_segment *var, int seg);
436 void (*set_segment)(struct kvm_vcpu *vcpu,
437 struct kvm_segment *var, int seg);
438 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
439 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
440 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
441 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
442 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
443 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
444 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
445 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
446 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
447 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
448 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
449 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
450 int *exception);
451 void (*cache_regs)(struct kvm_vcpu *vcpu);
452 void (*decache_regs)(struct kvm_vcpu *vcpu);
453 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
454 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
455
456 void (*tlb_flush)(struct kvm_vcpu *vcpu);
457 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
458 unsigned long addr, u32 err_code);
459
460 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
461
462 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
463 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
464 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
465 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
466 unsigned char *hypercall_addr);
467 int (*get_irq)(struct kvm_vcpu *vcpu);
468 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
469 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
470 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
471 struct kvm_run *run);
472
473 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
474};
475
476extern struct kvm_x86_ops *kvm_x86_ops;
477
478/* The guest did something we don't support. */
479#define pr_unimpl(vcpu, fmt, ...) \
480 do { \
481 if (printk_ratelimit()) \
482 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
483 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
484 } while (0)
485
486#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
487#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
488
489int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
490void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
491
492void vcpu_load(struct kvm_vcpu *vcpu);
493void vcpu_put(struct kvm_vcpu *vcpu);
494
495void decache_vcpus_on_cpu(int cpu);
496
497
498int kvm_init(void *opaque, unsigned int vcpu_size,
499 struct module *module);
500void kvm_exit(void);
501
502int kvm_mmu_module_init(void);
503void kvm_mmu_module_exit(void);
504
505void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
506int kvm_mmu_create(struct kvm_vcpu *vcpu);
507int kvm_mmu_setup(struct kvm_vcpu *vcpu);
508void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
509
510int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
511void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
512void kvm_mmu_zap_all(struct kvm *kvm);
513void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
514
515hpa_t gpa_to_hpa(struct kvm *kvm, gpa_t gpa);
516#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
517#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
518static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
519hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
520struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
521
522extern struct page *bad_page;
523
524int is_error_page(struct page *page);
525int kvm_is_error_hva(unsigned long addr);
526int kvm_set_memory_region(struct kvm *kvm,
527 struct kvm_userspace_memory_region *mem,
528 int user_alloc);
529int __kvm_set_memory_region(struct kvm *kvm,
530 struct kvm_userspace_memory_region *mem,
531 int user_alloc);
532gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
533struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
534void kvm_release_page(struct page *page);
535int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
536 int len);
537int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
538int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
539 int offset, int len);
540int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
541 unsigned long len);
542int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
543int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
544struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
545int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
546void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
547
548enum emulation_result {
549 EMULATE_DONE, /* no further processing */
550 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
551 EMULATE_FAIL, /* can't emulate this instruction */
552};
553
554int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
555 unsigned long cr2, u16 error_code, int no_decode);
556void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
557void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
558void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
559void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
560 unsigned long *rflags);
561
562unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
563void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
564 unsigned long *rflags);
565int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
566int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
567
568struct x86_emulate_ctxt;
569
570int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
571 int size, unsigned port);
572int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
573 int size, unsigned long count, int down,
574 gva_t address, int rep, unsigned port);
575void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
576int kvm_emulate_halt(struct kvm_vcpu *vcpu);
577int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
578int emulate_clts(struct kvm_vcpu *vcpu);
579int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
580 unsigned long *dest);
581int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
582 unsigned long value);
583
584void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
585void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
586void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
587void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
588unsigned long get_cr8(struct kvm_vcpu *vcpu);
589void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
590void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
591
592int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
593int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
594
595void fx_init(struct kvm_vcpu *vcpu);
596
597void kvm_vcpu_block(struct kvm_vcpu *vcpu);
598void kvm_resched(struct kvm_vcpu *vcpu);
599void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
600void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
601void kvm_flush_remote_tlbs(struct kvm *kvm);
602
603int emulator_read_std(unsigned long addr,
604 void *val,
605 unsigned int bytes,
606 struct kvm_vcpu *vcpu);
607int emulator_write_emulated(unsigned long addr,
608 const void *val,
609 unsigned int bytes,
610 struct kvm_vcpu *vcpu);
611
612unsigned long segment_base(u16 selector);
613
614void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
615 const u8 *new, int bytes);
616int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
617void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
618int kvm_mmu_load(struct kvm_vcpu *vcpu);
619void kvm_mmu_unload(struct kvm_vcpu *vcpu);
620
621int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
622
623int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
624
625long kvm_arch_dev_ioctl(struct file *filp,
626 unsigned int ioctl, unsigned long arg);
627long kvm_arch_vcpu_ioctl(struct file *filp,
628 unsigned int ioctl, unsigned long arg);
629void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
630void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
631
632int kvm_dev_ioctl_check_extension(long ext);
633
634int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
635 struct
636 kvm_userspace_memory_region *mem,
637 int user_alloc);
638long kvm_arch_vm_ioctl(struct file *filp,
639 unsigned int ioctl, unsigned long arg);
640void kvm_arch_destroy_vm(struct kvm *kvm);
641
642int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
643int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
644
645int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
646 struct kvm_translation *tr);
647
648int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
649int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
650int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
651 struct kvm_sregs *sregs);
652int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
653 struct kvm_sregs *sregs);
654int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
655 struct kvm_debug_guest *dbg);
656int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
657
658int kvm_arch_init(void *opaque);
659void kvm_arch_exit(void);
660
661int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
662void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
663
664void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
665void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
666void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
667struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
668void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu);
669
670int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
671void kvm_arch_hardware_enable(void *garbage);
672void kvm_arch_hardware_disable(void *garbage);
673int kvm_arch_hardware_setup(void);
674void kvm_arch_hardware_unsetup(void);
675void kvm_arch_check_processor_compat(void *rtn);
676
677void kvm_free_physmem(struct kvm *kvm);
678
679struct kvm *kvm_arch_create_vm(void);
680void kvm_arch_destroy_vm(struct kvm *kvm);
681
682static inline void kvm_guest_enter(void)
683{
684 account_system_vtime(current);
685 current->flags |= PF_VCPU;
686}
687
688static inline void kvm_guest_exit(void)
689{
690 account_system_vtime(current);
691 current->flags &= ~PF_VCPU;
692}
693
694static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
695{
696 return slot - kvm->memslots;
697}
698
699static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
700{
701 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
702
703 return (struct kvm_mmu_page *)page_private(page);
704}
705
706static inline u16 read_fs(void)
707{
708 u16 seg;
709 asm("mov %%fs, %0" : "=g"(seg));
710 return seg;
711}
712
713static inline u16 read_gs(void)
714{
715 u16 seg;
716 asm("mov %%gs, %0" : "=g"(seg));
717 return seg;
718}
719
720static inline u16 read_ldt(void)
721{
722 u16 ldt;
723 asm("sldt %0" : "=g"(ldt));
724 return ldt;
725}
726
727static inline void load_fs(u16 sel)
728{
729 asm("mov %0, %%fs" : : "rm"(sel));
730}
731
732static inline void load_gs(u16 sel)
733{
734 asm("mov %0, %%gs" : : "rm"(sel));
735}
736
737#ifndef load_ldt
738static inline void load_ldt(u16 sel)
739{
740 asm("lldt %0" : : "rm"(sel));
741}
742#endif
743
744static inline void get_idt(struct descriptor_table *table)
745{
746 asm("sidt %0" : "=m"(*table));
747}
748
749static inline void get_gdt(struct descriptor_table *table)
750{
751 asm("sgdt %0" : "=m"(*table));
752}
753
754static inline unsigned long read_tr_base(void)
755{
756 u16 tr;
757 asm("str %0" : "=g"(tr));
758 return segment_base(tr);
759}
760
761#ifdef CONFIG_X86_64
762static inline unsigned long read_msr(unsigned long msr)
763{
764 u64 value;
765
766 rdmsrl(msr, value);
767 return value;
768}
769#endif
770
771static inline void fx_save(struct i387_fxsave_struct *image)
772{
773 asm("fxsave (%0)":: "r" (image));
774}
775
776static inline void fx_restore(struct i387_fxsave_struct *image)
777{
778 asm("fxrstor (%0)":: "r" (image));
779}
780
781static inline void fpu_init(void)
782{
783 asm("finit");
784}
785
786static inline u32 get_rdx_init_val(void)
787{
788 return 0x600; /* P6 family */
789}
790
791#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
792#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
793#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
794#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
795#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
796#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
797#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
798#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
799#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
800
801#define MSR_IA32_TIME_STAMP_COUNTER 0x010
802
803#define TSS_IOPB_BASE_OFFSET 0x66
804#define TSS_BASE_SIZE 0x68
805#define TSS_IOPB_SIZE (65536 / 8)
806#define TSS_REDIRECTION_SIZE (256 / 8)
807#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
808
809struct kvm_stats_debugfs_item {
810 const char *name;
811 int offset;
812 struct dentry *dentry;
813};
814extern struct kvm_stats_debugfs_item debugfs_entries[];
815
816#endif
Linux 6.x block layer and io_uring tree(s)