1
2#ifndef ARCH_X86_KVM_X86_H
3#define ARCH_X86_KVM_X86_H
4
5#include <linux/kvm_host.h>
6#include <asm/mce.h>
7#include <asm/pvclock.h>
8#include "kvm_cache_regs.h"
9#include "kvm_emulate.h"
10
11void kvm_spurious_fault(void);
12
13static __always_inline void kvm_guest_enter_irqoff(void)
14{
15
16
17
18
19
20
21
22
23
24
25
26
27 instrumentation_begin();
28 trace_hardirqs_on_prepare();
29 lockdep_hardirqs_on_prepare(CALLER_ADDR0);
30 instrumentation_end();
31
32 guest_enter_irqoff();
33 lockdep_hardirqs_on(CALLER_ADDR0);
34}
35
36static __always_inline void kvm_guest_exit_irqoff(void)
37{
38
39
40
41
42
43
44
45
46
47
48
49
50 lockdep_hardirqs_off(CALLER_ADDR0);
51 context_tracking_guest_exit();
52
53 instrumentation_begin();
54 trace_hardirqs_off_finish();
55 instrumentation_end();
56}
57
58#define KVM_NESTED_VMENTER_CONSISTENCY_CHECK(consistency_check) \
59({ \
60 bool failed = (consistency_check); \
61 if (failed) \
62 trace_kvm_nested_vmenter_failed(#consistency_check, 0); \
63 failed; \
64})
65
66#define KVM_DEFAULT_PLE_GAP 128
67#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
68#define KVM_DEFAULT_PLE_WINDOW_GROW 2
69#define KVM_DEFAULT_PLE_WINDOW_SHRINK 0
70#define KVM_VMX_DEFAULT_PLE_WINDOW_MAX UINT_MAX
71#define KVM_SVM_DEFAULT_PLE_WINDOW_MAX USHRT_MAX
72#define KVM_SVM_DEFAULT_PLE_WINDOW 3000
73
74static inline unsigned int __grow_ple_window(unsigned int val,
75 unsigned int base, unsigned int modifier, unsigned int max)
76{
77 u64 ret = val;
78
79 if (modifier < 1)
80 return base;
81
82 if (modifier < base)
83 ret *= modifier;
84 else
85 ret += modifier;
86
87 return min(ret, (u64)max);
88}
89
90static inline unsigned int __shrink_ple_window(unsigned int val,
91 unsigned int base, unsigned int modifier, unsigned int min)
92{
93 if (modifier < 1)
94 return base;
95
96 if (modifier < base)
97 val /= modifier;
98 else
99 val -= modifier;
100
101 return max(val, min);
102}
103
104#define MSR_IA32_CR_PAT_DEFAULT 0x0007040600070406ULL
105
106int kvm_check_nested_events(struct kvm_vcpu *vcpu);
107
108static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
109{
110 vcpu->arch.exception.pending = false;
111 vcpu->arch.exception.injected = false;
112}
113
114static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector,
115 bool soft)
116{
117 vcpu->arch.interrupt.injected = true;
118 vcpu->arch.interrupt.soft = soft;
119 vcpu->arch.interrupt.nr = vector;
120}
121
122static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
123{
124 vcpu->arch.interrupt.injected = false;
125}
126
127static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
128{
129 return vcpu->arch.exception.injected || vcpu->arch.interrupt.injected ||
130 vcpu->arch.nmi_injected;
131}
132
133static inline bool kvm_exception_is_soft(unsigned int nr)
134{
135 return (nr == BP_VECTOR) || (nr == OF_VECTOR);
136}
137
138static inline bool is_protmode(struct kvm_vcpu *vcpu)
139{
140 return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
141}
142
143static inline int is_long_mode(struct kvm_vcpu *vcpu)
144{
145#ifdef CONFIG_X86_64
146 return vcpu->arch.efer & EFER_LMA;
147#else
148 return 0;
149#endif
150}
151
152static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu)
153{
154 int cs_db, cs_l;
155
156 if (!is_long_mode(vcpu))
157 return false;
158 static_call(kvm_x86_get_cs_db_l_bits)(vcpu, &cs_db, &cs_l);
159 return cs_l;
160}
161
162static inline bool x86_exception_has_error_code(unsigned int vector)
163{
164 static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) |
165 BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) |
166 BIT(PF_VECTOR) | BIT(AC_VECTOR);
167
168 return (1U << vector) & exception_has_error_code;
169}
170
171static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
172{
173 return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
174}
175
176static inline void kvm_vcpu_flush_tlb_current(struct kvm_vcpu *vcpu)
177{
178 ++vcpu->stat.tlb_flush;
179 static_call(kvm_x86_tlb_flush_current)(vcpu);
180}
181
182static inline int is_pae(struct kvm_vcpu *vcpu)
183{
184 return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
185}
186
187static inline int is_pse(struct kvm_vcpu *vcpu)
188{
189 return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
190}
191
192static inline int is_paging(struct kvm_vcpu *vcpu)
193{
194 return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
195}
196
197static inline bool is_pae_paging(struct kvm_vcpu *vcpu)
198{
199 return !is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu);
200}
201
202static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu)
203{
204 return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48;
205}
206
207static inline u64 get_canonical(u64 la, u8 vaddr_bits)
208{
209 return ((int64_t)la << (64 - vaddr_bits)) >> (64 - vaddr_bits);
210}
211
212static inline bool is_noncanonical_address(u64 la, struct kvm_vcpu *vcpu)
213{
214 return get_canonical(la, vcpu_virt_addr_bits(vcpu)) != la;
215}
216
217static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
218 gva_t gva, gfn_t gfn, unsigned access)
219{
220 u64 gen = kvm_memslots(vcpu->kvm)->generation;
221
222 if (unlikely(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS))
223 return;
224
225
226
227
228
229 vcpu->arch.mmio_gva = mmu_is_nested(vcpu) ? 0 : gva & PAGE_MASK;
230 vcpu->arch.mmio_access = access;
231 vcpu->arch.mmio_gfn = gfn;
232 vcpu->arch.mmio_gen = gen;
233}
234
235static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu)
236{
237 return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation;
238}
239
240
241
242
243
244#define MMIO_GVA_ANY (~(gva_t)0)
245
246static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
247{
248 if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
249 return;
250
251 vcpu->arch.mmio_gva = 0;
252}
253
254static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
255{
256 if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva &&
257 vcpu->arch.mmio_gva == (gva & PAGE_MASK))
258 return true;
259
260 return false;
261}
262
263static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
264{
265 if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn &&
266 vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
267 return true;
268
269 return false;
270}
271
272static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu, int reg)
273{
274 unsigned long val = kvm_register_read_raw(vcpu, reg);
275
276 return is_64_bit_mode(vcpu) ? val : (u32)val;
277}
278
279static inline void kvm_register_write(struct kvm_vcpu *vcpu,
280 int reg, unsigned long val)
281{
282 if (!is_64_bit_mode(vcpu))
283 val = (u32)val;
284 return kvm_register_write_raw(vcpu, reg, val);
285}
286
287static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk)
288{
289 return !(kvm->arch.disabled_quirks & quirk);
290}
291
292static inline bool kvm_vcpu_latch_init(struct kvm_vcpu *vcpu)
293{
294 return is_smm(vcpu) || static_call(kvm_x86_apic_init_signal_blocked)(vcpu);
295}
296
297void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock, int sec_hi_ofs);
298void kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
299
300u64 get_kvmclock_ns(struct kvm *kvm);
301
302int kvm_read_guest_virt(struct kvm_vcpu *vcpu,
303 gva_t addr, void *val, unsigned int bytes,
304 struct x86_exception *exception);
305
306int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu,
307 gva_t addr, void *val, unsigned int bytes,
308 struct x86_exception *exception);
309
310int handle_ud(struct kvm_vcpu *vcpu);
311
312void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu);
313
314void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu);
315u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
316bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);
317int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
318int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
319bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn,
320 int page_num);
321bool kvm_vector_hashing_enabled(void);
322void kvm_fixup_and_inject_pf_error(struct kvm_vcpu *vcpu, gva_t gva, u16 error_code);
323int x86_decode_emulated_instruction(struct kvm_vcpu *vcpu, int emulation_type,
324 void *insn, int insn_len);
325int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
326 int emulation_type, void *insn, int insn_len);
327fastpath_t handle_fastpath_set_msr_irqoff(struct kvm_vcpu *vcpu);
328
329extern u64 host_xcr0;
330extern u64 supported_xcr0;
331extern u64 host_xss;
332extern u64 supported_xss;
333
334static inline bool kvm_mpx_supported(void)
335{
336 return (supported_xcr0 & (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR))
337 == (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR);
338}
339
340extern unsigned int min_timer_period_us;
341
342extern bool enable_vmware_backdoor;
343
344extern int pi_inject_timer;
345
346extern struct static_key kvm_no_apic_vcpu;
347
348extern bool report_ignored_msrs;
349
350static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
351{
352 return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
353 vcpu->arch.virtual_tsc_shift);
354}
355
356
357
358
359
360
361#define do_shl32_div32(n, base) \
362 ({ \
363 u32 __quot, __rem; \
364 asm("divl %2" : "=a" (__quot), "=d" (__rem) \
365 : "rm" (base), "0" (0), "1" ((u32) n)); \
366 n = __quot; \
367 __rem; \
368 })
369
370static inline bool kvm_mwait_in_guest(struct kvm *kvm)
371{
372 return kvm->arch.mwait_in_guest;
373}
374
375static inline bool kvm_hlt_in_guest(struct kvm *kvm)
376{
377 return kvm->arch.hlt_in_guest;
378}
379
380static inline bool kvm_pause_in_guest(struct kvm *kvm)
381{
382 return kvm->arch.pause_in_guest;
383}
384
385static inline bool kvm_cstate_in_guest(struct kvm *kvm)
386{
387 return kvm->arch.cstate_in_guest;
388}
389
390DECLARE_PER_CPU(struct kvm_vcpu *, current_vcpu);
391
392static inline void kvm_before_interrupt(struct kvm_vcpu *vcpu)
393{
394 __this_cpu_write(current_vcpu, vcpu);
395}
396
397static inline void kvm_after_interrupt(struct kvm_vcpu *vcpu)
398{
399 __this_cpu_write(current_vcpu, NULL);
400}
401
402
403static inline bool kvm_pat_valid(u64 data)
404{
405 if (data & 0xF8F8F8F8F8F8F8F8ull)
406 return false;
407
408 return (data | ((data & 0x0202020202020202ull) << 1)) == data;
409}
410
411static inline bool kvm_dr7_valid(u64 data)
412{
413
414 return !(data >> 32);
415}
416static inline bool kvm_dr6_valid(u64 data)
417{
418
419 return !(data >> 32);
420}
421
422
423
424
425
426
427
428
429static inline void kvm_machine_check(void)
430{
431#if defined(CONFIG_X86_MCE)
432 struct pt_regs regs = {
433 .cs = 3,
434 .flags = X86_EFLAGS_IF,
435 };
436
437 do_machine_check(®s);
438#endif
439}
440
441void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu);
442void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu);
443int kvm_spec_ctrl_test_value(u64 value);
444bool kvm_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
445int kvm_handle_memory_failure(struct kvm_vcpu *vcpu, int r,
446 struct x86_exception *e);
447int kvm_handle_invpcid(struct kvm_vcpu *vcpu, unsigned long type, gva_t gva);
448bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type);
449
450
451
452
453
454
455#define KVM_MSR_RET_INVALID 2
456#define KVM_MSR_RET_FILTERED 3
457
458#define __cr4_reserved_bits(__cpu_has, __c) \
459({ \
460 u64 __reserved_bits = CR4_RESERVED_BITS; \
461 \
462 if (!__cpu_has(__c, X86_FEATURE_XSAVE)) \
463 __reserved_bits |= X86_CR4_OSXSAVE; \
464 if (!__cpu_has(__c, X86_FEATURE_SMEP)) \
465 __reserved_bits |= X86_CR4_SMEP; \
466 if (!__cpu_has(__c, X86_FEATURE_SMAP)) \
467 __reserved_bits |= X86_CR4_SMAP; \
468 if (!__cpu_has(__c, X86_FEATURE_FSGSBASE)) \
469 __reserved_bits |= X86_CR4_FSGSBASE; \
470 if (!__cpu_has(__c, X86_FEATURE_PKU)) \
471 __reserved_bits |= X86_CR4_PKE; \
472 if (!__cpu_has(__c, X86_FEATURE_LA57)) \
473 __reserved_bits |= X86_CR4_LA57; \
474 if (!__cpu_has(__c, X86_FEATURE_UMIP)) \
475 __reserved_bits |= X86_CR4_UMIP; \
476 if (!__cpu_has(__c, X86_FEATURE_VMX)) \
477 __reserved_bits |= X86_CR4_VMXE; \
478 if (!__cpu_has(__c, X86_FEATURE_PCID)) \
479 __reserved_bits |= X86_CR4_PCIDE; \
480 __reserved_bits; \
481})
482
483int kvm_sev_es_mmio_write(struct kvm_vcpu *vcpu, gpa_t src, unsigned int bytes,
484 void *dst);
485int kvm_sev_es_mmio_read(struct kvm_vcpu *vcpu, gpa_t src, unsigned int bytes,
486 void *dst);
487int kvm_sev_es_string_io(struct kvm_vcpu *vcpu, unsigned int size,
488 unsigned int port, void *data, unsigned int count,
489 int in);
490
491#endif
492