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KVM: MMU: Simplify kvm_mmu_free_page() a tiny bit
[linux-2.6-block.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>
13#include <linux/mm.h>
e8edc6e0 14#include <asm/signal.h>
6aa8b732
AK		 15
16#include "vmx.h"
17#include <linux/kvm.h>
102d8325 18#include <linux/kvm_para.h>
6aa8b732
AK		 19
20#define CR0_PE_MASK (1ULL << 0)
a3a06367 21#define CR0_MP_MASK (1ULL << 1)
6aa8b732
AK		 22#define CR0_TS_MASK (1ULL << 3)
23#define CR0_NE_MASK (1ULL << 5)
24#define CR0_WP_MASK (1ULL << 16)
25#define CR0_NW_MASK (1ULL << 29)
26#define CR0_CD_MASK (1ULL << 30)
27#define CR0_PG_MASK (1ULL << 31)
28
29#define CR3_WPT_MASK (1ULL << 3)
30#define CR3_PCD_MASK (1ULL << 4)
31
32#define CR3_RESEVED_BITS 0x07ULL
33#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
34#define CR3_FLAGS_MASK ((1ULL << 5) - 1)
35
36#define CR4_VME_MASK (1ULL << 0)
37#define CR4_PSE_MASK (1ULL << 4)
38#define CR4_PAE_MASK (1ULL << 5)
39#define CR4_PGE_MASK (1ULL << 7)
40#define CR4_VMXE_MASK (1ULL << 13)
41
42#define KVM_GUEST_CR0_MASK \
43 (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
44 | CR0_NW_MASK | CR0_CD_MASK)
45#define KVM_VM_CR0_ALWAYS_ON \
a3a06367
AK		 46 (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK | CR0_TS_MASK \
47 | CR0_MP_MASK)
6aa8b732
AK		 48#define KVM_GUEST_CR4_MASK \
49 (CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
50#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
51#define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)
52
53#define INVALID_PAGE (~(hpa_t)0)
54#define UNMAPPED_GVA (~(gpa_t)0)
55
56#define KVM_MAX_VCPUS 1
e8207547 57#define KVM_ALIAS_SLOTS 4
6aa8b732 58#define KVM_MEMORY_SLOTS 4
7494c0cc 59#define KVM_NUM_MMU_PAGES 1024
ebeace86
AK		 60#define KVM_MIN_FREE_MMU_PAGES 5
61#define KVM_REFILL_PAGES 25
06465c5a 62#define KVM_MAX_CPUID_ENTRIES 40
6aa8b732
AK		 63
64#define FX_IMAGE_SIZE 512
65#define FX_IMAGE_ALIGN 16
66#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
67
68#define DE_VECTOR 0
7807fa6c 69#define NM_VECTOR 7
6aa8b732
AK		 70#define DF_VECTOR 8
71#define TS_VECTOR 10
72#define NP_VECTOR 11
73#define SS_VECTOR 12
74#define GP_VECTOR 13
75#define PF_VECTOR 14
76
77#define SELECTOR_TI_MASK (1 << 2)
78#define SELECTOR_RPL_MASK 0x03
79
80#define IOPL_SHIFT 12
81
039576c0
AK		 82#define KVM_PIO_PAGE_OFFSET 1
83
6aa8b732
AK		 84/*
85 * Address types:
86 *
87 * gva - guest virtual address
88 * gpa - guest physical address
89 * gfn - guest frame number
90 * hva - host virtual address
91 * hpa - host physical address
92 * hfn - host frame number
93 */
94
95typedef unsigned long gva_t;
96typedef u64 gpa_t;
97typedef unsigned long gfn_t;
98
99typedef unsigned long hva_t;
100typedef u64 hpa_t;
101typedef unsigned long hfn_t;
102
cea0f0e7
AK		 103#define NR_PTE_CHAIN_ENTRIES 5
104
105struct kvm_pte_chain {
106 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
107 struct hlist_node link;
108};
109
110/*
111 * kvm_mmu_page_role, below, is defined as:
112 *
113 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
114 * bits 4:7 - page table level for this shadow (1-4)
115 * bits 8:9 - page table quadrant for 2-level guests
116 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
d28c6cfb 117 * bits 17:18 - "access" - the user and writable bits of a huge page pde
cea0f0e7
AK		 118 */
119union kvm_mmu_page_role {
120 unsigned word;
121 struct {
122 unsigned glevels : 4;
123 unsigned level : 4;
124 unsigned quadrant : 2;
125 unsigned pad_for_nice_hex_output : 6;
126 unsigned metaphysical : 1;
d28c6cfb 127 unsigned hugepage_access : 2;
cea0f0e7
AK		 128 };
129};
130
6aa8b732
AK		 131struct kvm_mmu_page {
132 struct list_head link;
cea0f0e7
AK		 133 struct hlist_node hash_link;
134
135 /*
136 * The following two entries are used to key the shadow page in the
137 * hash table.
138 */
139 gfn_t gfn;
140 union kvm_mmu_page_role role;
141
6aa8b732
AK		 142 hpa_t page_hpa;
143 unsigned long slot_bitmap; /* One bit set per slot which has memory
144 * in this shadow page.
145 */
cea0f0e7 146 int multimapped; /* More than one parent_pte? */
3bb65a22 147 int root_count; /* Currently serving as active root */
cea0f0e7
AK		 148 union {
149 u64 *parent_pte; /* !multimapped */
150 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
151 };
6aa8b732
AK		 152};
153
154struct vmcs {
155 u32 revision_id;
156 u32 abort;
157 char data[0];
158};
159
160#define vmx_msr_entry kvm_msr_entry
161
162struct kvm_vcpu;
163
164/*
165 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
166 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
167 * mode.
168 */
169struct kvm_mmu {
170 void (*new_cr3)(struct kvm_vcpu *vcpu);
171 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
6aa8b732
AK		 172 void (*free)(struct kvm_vcpu *vcpu);
173 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
174 hpa_t root_hpa;
175 int root_level;
176 int shadow_root_level;
17ac10ad
AK		 177
178 u64 *pae_root;
6aa8b732
AK		 179};
180
714b93da
AK		 181#define KVM_NR_MEM_OBJS 20
182
183struct kvm_mmu_memory_cache {
184 int nobjs;
185 void *objects[KVM_NR_MEM_OBJS];
186};
187
188/*
189 * We don't want allocation failures within the mmu code, so we preallocate
190 * enough memory for a single page fault in a cache.
191 */
6aa8b732
AK		 192struct kvm_guest_debug {
193 int enabled;
194 unsigned long bp[4];
195 int singlestep;
196};
197
198enum {
199 VCPU_REGS_RAX = 0,
200 VCPU_REGS_RCX = 1,
201 VCPU_REGS_RDX = 2,
202 VCPU_REGS_RBX = 3,
203 VCPU_REGS_RSP = 4,
204 VCPU_REGS_RBP = 5,
205 VCPU_REGS_RSI = 6,
206 VCPU_REGS_RDI = 7,
05b3e0c2 207#ifdef CONFIG_X86_64
6aa8b732
AK		 208 VCPU_REGS_R8 = 8,
209 VCPU_REGS_R9 = 9,
210 VCPU_REGS_R10 = 10,
211 VCPU_REGS_R11 = 11,
212 VCPU_REGS_R12 = 12,
213 VCPU_REGS_R13 = 13,
214 VCPU_REGS_R14 = 14,
215 VCPU_REGS_R15 = 15,
216#endif
217 NR_VCPU_REGS
218};
219
220enum {
221 VCPU_SREG_CS,
222 VCPU_SREG_DS,
223 VCPU_SREG_ES,
224 VCPU_SREG_FS,
225 VCPU_SREG_GS,
226 VCPU_SREG_SS,
227 VCPU_SREG_TR,
228 VCPU_SREG_LDTR,
229};
230
039576c0
AK		 231struct kvm_pio_request {
232 unsigned long count;
233 int cur_count;
234 struct page *guest_pages[2];
235 unsigned guest_page_offset;
236 int in;
237 int size;
238 int string;
239 int down;
240 int rep;
241};
242
1165f5fe
AK		 243struct kvm_stat {
244 u32 pf_fixed;
245 u32 pf_guest;
246 u32 tlb_flush;
247 u32 invlpg;
248
249 u32 exits;
250 u32 io_exits;
251 u32 mmio_exits;
252 u32 signal_exits;
253 u32 irq_window_exits;
254 u32 halt_exits;
255 u32 request_irq_exits;
256 u32 irq_exits;
e6adf283 257 u32 light_exits;
1165f5fe
AK		 258};
259
6aa8b732
AK		 260struct kvm_vcpu {
261 struct kvm *kvm;
262 union {
263 struct vmcs *vmcs;
264 struct vcpu_svm *svm;
265 };
266 struct mutex mutex;
267 int cpu;
268 int launched;
0cc5064d 269 u64 host_tsc;
9a2bb7f4 270 struct kvm_run *run;
c1150d8c 271 int interrupt_window_open;
6aa8b732
AK		 272 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
273#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
274 unsigned long irq_pending[NR_IRQ_WORDS];
275 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
276 unsigned long rip; /* needs vcpu_load_rsp_rip() */
277
278 unsigned long cr0;
279 unsigned long cr2;
280 unsigned long cr3;
102d8325
IM		 281 gpa_t para_state_gpa;
282 struct page *para_state_page;
283 gpa_t hypercall_gpa;
6aa8b732
AK		 284 unsigned long cr4;
285 unsigned long cr8;
1342d353 286 u64 pdptrs[4]; /* pae */
6aa8b732
AK		 287 u64 shadow_efer;
288 u64 apic_base;
6f00e68f 289 u64 ia32_misc_enable_msr;
6aa8b732
AK		 290 int nmsrs;
291 struct vmx_msr_entry *guest_msrs;
292 struct vmx_msr_entry *host_msrs;
293
294 struct list_head free_pages;
295 struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
296 struct kvm_mmu mmu;
297
714b93da
AK		 298 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
299 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
300
86a5ba02
AK		 301 gfn_t last_pt_write_gfn;
302 int last_pt_write_count;
303
6aa8b732
AK		 304 struct kvm_guest_debug guest_debug;
305
306 char fx_buf[FX_BUF_SIZE];
307 char *host_fx_image;
308 char *guest_fx_image;
7807fa6c 309 int fpu_active;
7702fd1f 310 int guest_fpu_loaded;
33ed6329
AK		 311 struct vmx_host_state {
312 int loaded;
313 u16 fs_sel, gs_sel, ldt_sel;
314 int fs_gs_ldt_reload_needed;
315 } vmx_host_state;
6aa8b732
AK		 316
317 int mmio_needed;
318 int mmio_read_completed;
319 int mmio_is_write;
320 int mmio_size;
321 unsigned char mmio_data[8];
322 gpa_t mmio_phys_addr;
e7df56e4 323 gva_t mmio_fault_cr2;
039576c0
AK		 324 struct kvm_pio_request pio;
325 void *pio_data;
6aa8b732 326
1961d276
AK		 327 int sigset_active;
328 sigset_t sigset;
329
1165f5fe
AK		 330 struct kvm_stat stat;
331
6aa8b732
AK		 332 struct {
333 int active;
334 u8 save_iopl;
335 struct kvm_save_segment {
336 u16 selector;
337 unsigned long base;
338 u32 limit;
339 u32 ar;
340 } tr, es, ds, fs, gs;
341 } rmode;
06465c5a
AK		 342
343 int cpuid_nent;
344 struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
6aa8b732
AK		 345};
346
e8207547
AK		 347struct kvm_mem_alias {
348 gfn_t base_gfn;
349 unsigned long npages;
350 gfn_t target_gfn;
351};
352
6aa8b732
AK		 353struct kvm_memory_slot {
354 gfn_t base_gfn;
355 unsigned long npages;
356 unsigned long flags;
357 struct page **phys_mem;
358 unsigned long *dirty_bitmap;
359};
360
361struct kvm {
362 spinlock_t lock; /* protects everything except vcpus */
e8207547
AK		 363 int naliases;
364 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
6aa8b732
AK		 365 int nmemslots;
366 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
cea0f0e7
AK		 367 /*
368 * Hash table of struct kvm_mmu_page.
369 */
6aa8b732 370 struct list_head active_mmu_pages;
ebeace86 371 int n_free_mmu_pages;
cea0f0e7 372 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
6aa8b732
AK		 373 struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
374 int memory_config_version;
375 int busy;
cd4a4e53 376 unsigned long rmap_overflow;
133de902 377 struct list_head vm_list;
bccf2150 378 struct file *filp;
6aa8b732
AK		 379};
380
6aa8b732
AK		 381struct descriptor_table {
382 u16 limit;
383 unsigned long base;
384} __attribute__((packed));
385
386struct kvm_arch_ops {
387 int (*cpu_has_kvm_support)(void); /* __init */
388 int (*disabled_by_bios)(void); /* __init */
389 void (*hardware_enable)(void *dummy); /* __init */
390 void (*hardware_disable)(void *dummy);
391 int (*hardware_setup)(void); /* __init */
392 void (*hardware_unsetup)(void); /* __exit */
393
394 int (*vcpu_create)(struct kvm_vcpu *vcpu);
395 void (*vcpu_free)(struct kvm_vcpu *vcpu);
396
bccf2150 397 void (*vcpu_load)(struct kvm_vcpu *vcpu);
6aa8b732 398 void (*vcpu_put)(struct kvm_vcpu *vcpu);
774c47f1 399 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
6aa8b732
AK		 400
401 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
402 struct kvm_debug_guest *dbg);
403 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
404 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
405 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
406 void (*get_segment)(struct kvm_vcpu *vcpu,
407 struct kvm_segment *var, int seg);
408 void (*set_segment)(struct kvm_vcpu *vcpu,
409 struct kvm_segment *var, int seg);
6aa8b732 410 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
25c4c276 411 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
6aa8b732 412 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
6aa8b732
AK		 413 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
414 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
415 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
416 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
417 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
418 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
419 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
420 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
421 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
422 int *exception);
423 void (*cache_regs)(struct kvm_vcpu *vcpu);
424 void (*decache_regs)(struct kvm_vcpu *vcpu);
425 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
426 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
427
428 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
429 void (*tlb_flush)(struct kvm_vcpu *vcpu);
430 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
431 unsigned long addr, u32 err_code);
432
433 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
434
435 int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
436 int (*vcpu_setup)(struct kvm_vcpu *vcpu);
437 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
102d8325
IM		 438 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
439 unsigned char *hypercall_addr);
6aa8b732
AK		 440};
441
6aa8b732
AK		 442extern struct kvm_arch_ops *kvm_arch_ops;
443
444#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
445#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
446
447int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
448void kvm_exit_arch(void);
449
b5a33a75
AK		 450int kvm_mmu_module_init(void);
451void kvm_mmu_module_exit(void);
452
6aa8b732 453void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
8018c27b
IM		 454int kvm_mmu_create(struct kvm_vcpu *vcpu);
455int kvm_mmu_setup(struct kvm_vcpu *vcpu);
6aa8b732
AK		 456
457int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
714b93da 458void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
e0fa826f 459void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);
6aa8b732
AK		 460
461hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
462#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
463#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
464static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
465hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
039576c0 466struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
6aa8b732
AK		 467
468void kvm_emulator_want_group7_invlpg(void);
469
470extern hpa_t bad_page_address;
471
954bbbc2 472struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
6aa8b732
AK		 473struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
474void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
475
476enum emulation_result {
477 EMULATE_DONE, /* no further processing */
478 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
479 EMULATE_FAIL, /* can't emulate this instruction */
480};
481
482int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
483 unsigned long cr2, u16 error_code);
484void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
485void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
486void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
487 unsigned long *rflags);
488
489unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
490void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
491 unsigned long *rflags);
492
493struct x86_emulate_ctxt;
494
039576c0
AK		 495int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
496 int size, unsigned long count, int string, int down,
497 gva_t address, int rep, unsigned port);
06465c5a 498void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
6aa8b732
AK		 499int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
500int emulate_clts(struct kvm_vcpu *vcpu);
501int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
502 unsigned long *dest);
503int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
504 unsigned long value);
505
506void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
507void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
508void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
509void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
510void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
511
3bab1f5d
AK		 512int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
513int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
6aa8b732
AK		 514
515void fx_init(struct kvm_vcpu *vcpu);
516
517void load_msrs(struct vmx_msr_entry *e, int n);
518void save_msrs(struct vmx_msr_entry *e, int n);
519void kvm_resched(struct kvm_vcpu *vcpu);
7702fd1f
AK		 520void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
521void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
6aa8b732
AK		 522
523int kvm_read_guest(struct kvm_vcpu *vcpu,
524 gva_t addr,
525 unsigned long size,
526 void *dest);
527
528int kvm_write_guest(struct kvm_vcpu *vcpu,
529 gva_t addr,
530 unsigned long size,
531 void *data);
532
533unsigned long segment_base(u16 selector);
534
09072daf
AK		 535void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
536 const u8 *old, const u8 *new, int bytes);
a436036b 537int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
ebeace86
AK		 538void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
539
270fd9b9
AK		 540int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
541
ebeace86
AK		 542static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
543 u32 error_code)
544{
545 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
546 kvm_mmu_free_some_pages(vcpu);
547 return vcpu->mmu.page_fault(vcpu, gva, error_code);
548}
da4a00f0 549
a9058ecd
AK		 550static inline int is_long_mode(struct kvm_vcpu *vcpu)
551{
552#ifdef CONFIG_X86_64
553 return vcpu->shadow_efer & EFER_LME;
554#else
555 return 0;
556#endif
557}
558
6aa8b732
AK		 559static inline int is_pae(struct kvm_vcpu *vcpu)
560{
561 return vcpu->cr4 & CR4_PAE_MASK;
562}
563
564static inline int is_pse(struct kvm_vcpu *vcpu)
565{
566 return vcpu->cr4 & CR4_PSE_MASK;
567}
568
569static inline int is_paging(struct kvm_vcpu *vcpu)
570{
571 return vcpu->cr0 & CR0_PG_MASK;
572}
573
574static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
575{
576 return slot - kvm->memslots;
577}
578
579static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
580{
581 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
582
5972e953 583 return (struct kvm_mmu_page *)page_private(page);
6aa8b732
AK		 584}
585
586static inline u16 read_fs(void)
587{
588 u16 seg;
589 asm ("mov %%fs, %0" : "=g"(seg));
590 return seg;
591}
592
593static inline u16 read_gs(void)
594{
595 u16 seg;
596 asm ("mov %%gs, %0" : "=g"(seg));
597 return seg;
598}
599
600static inline u16 read_ldt(void)
601{
602 u16 ldt;
603 asm ("sldt %0" : "=g"(ldt));
604 return ldt;
605}
606
607static inline void load_fs(u16 sel)
608{
609 asm ("mov %0, %%fs" : : "rm"(sel));
610}
611
612static inline void load_gs(u16 sel)
613{
614 asm ("mov %0, %%gs" : : "rm"(sel));
615}
616
617#ifndef load_ldt
618static inline void load_ldt(u16 sel)
619{
a0610ddf 620 asm ("lldt %0" : : "rm"(sel));
6aa8b732
AK		 621}
622#endif
623
624static inline void get_idt(struct descriptor_table *table)
625{
626 asm ("sidt %0" : "=m"(*table));
627}
628
629static inline void get_gdt(struct descriptor_table *table)
630{
631 asm ("sgdt %0" : "=m"(*table));
632}
633
634static inline unsigned long read_tr_base(void)
635{
636 u16 tr;
637 asm ("str %0" : "=g"(tr));
638 return segment_base(tr);
639}
640
05b3e0c2 641#ifdef CONFIG_X86_64
6aa8b732
AK		 642static inline unsigned long read_msr(unsigned long msr)
643{
644 u64 value;
645
646 rdmsrl(msr, value);
647 return value;
648}
649#endif
650
651static inline void fx_save(void *image)
652{
653 asm ("fxsave (%0)":: "r" (image));
654}
655
656static inline void fx_restore(void *image)
657{
658 asm ("fxrstor (%0)":: "r" (image));
659}
660
661static inline void fpu_init(void)
662{
663 asm ("finit");
664}
665
666static inline u32 get_rdx_init_val(void)
667{
668 return 0x600; /* P6 family */
669}
670
671#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
672#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
673#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
674#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
675#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
676#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
677#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
678#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
679#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
680
681#define MSR_IA32_TIME_STAMP_COUNTER 0x010
682
683#define TSS_IOPB_BASE_OFFSET 0x66
684#define TSS_BASE_SIZE 0x68
685#define TSS_IOPB_SIZE (65536 / 8)
686#define TSS_REDIRECTION_SIZE (256 / 8)
687#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
688
6aa8b732 689#endif
Linux 6.x block layer and io_uring tree(s)