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/pvclock.h>
7#include "kvm_cache_regs.h"
8
9#define KVM_DEFAULT_PLE_GAP 128
10#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
11#define KVM_DEFAULT_PLE_WINDOW_GROW 2
12#define KVM_DEFAULT_PLE_WINDOW_SHRINK 0
13#define KVM_VMX_DEFAULT_PLE_WINDOW_MAX UINT_MAX
14#define KVM_SVM_DEFAULT_PLE_WINDOW_MAX USHRT_MAX
15#define KVM_SVM_DEFAULT_PLE_WINDOW 3000
16
17static inline unsigned int __grow_ple_window(unsigned int val,
18 unsigned int base, unsigned int modifier, unsigned int max)
19{
20 u64 ret = val;
21
22 if (modifier < 1)
23 return base;
24
25 if (modifier < base)
26 ret *= modifier;
27 else
28 ret += modifier;
29
30 return min(ret, (u64)max);
31}
32
33static inline unsigned int __shrink_ple_window(unsigned int val,
34 unsigned int base, unsigned int modifier, unsigned int min)
35{
36 if (modifier < 1)
37 return base;
38
39 if (modifier < base)
40 val /= modifier;
41 else
42 val -= modifier;
43
44 return max(val, min);
45}
46
47#define MSR_IA32_CR_PAT_DEFAULT 0x0007040600070406ULL
48
49static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
50{
51 vcpu->arch.exception.pending = false;
52 vcpu->arch.exception.injected = false;
53}
54
55static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector,
56 bool soft)
57{
58 vcpu->arch.interrupt.injected = true;
59 vcpu->arch.interrupt.soft = soft;
60 vcpu->arch.interrupt.nr = vector;
61}
62
63static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
64{
65 vcpu->arch.interrupt.injected = false;
66}
67
68static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
69{
70 return vcpu->arch.exception.injected || vcpu->arch.interrupt.injected ||
71 vcpu->arch.nmi_injected;
72}
73
74static inline bool kvm_exception_is_soft(unsigned int nr)
75{
76 return (nr == BP_VECTOR) || (nr == OF_VECTOR);
77}
78
79static inline bool is_protmode(struct kvm_vcpu *vcpu)
80{
81 return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
82}
83
84static inline int is_long_mode(struct kvm_vcpu *vcpu)
85{
86#ifdef CONFIG_X86_64
87 return vcpu->arch.efer & EFER_LMA;
88#else
89 return 0;
90#endif
91}
92
93static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu)
94{
95 int cs_db, cs_l;
96
97 if (!is_long_mode(vcpu))
98 return false;
99 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
100 return cs_l;
101}
102
103static inline bool is_la57_mode(struct kvm_vcpu *vcpu)
104{
105#ifdef CONFIG_X86_64
106 return (vcpu->arch.efer & EFER_LMA) &&
107 kvm_read_cr4_bits(vcpu, X86_CR4_LA57);
108#else
109 return 0;
110#endif
111}
112
113static inline bool x86_exception_has_error_code(unsigned int vector)
114{
115 static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) |
116 BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) |
117 BIT(PF_VECTOR) | BIT(AC_VECTOR);
118
119 return (1U << vector) & exception_has_error_code;
120}
121
122static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
123{
124 return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
125}
126
127static inline int is_pae(struct kvm_vcpu *vcpu)
128{
129 return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
130}
131
132static inline int is_pse(struct kvm_vcpu *vcpu)
133{
134 return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
135}
136
137static inline int is_paging(struct kvm_vcpu *vcpu)
138{
139 return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
140}
141
142static inline u32 bit(int bitno)
143{
144 return 1 << (bitno & 31);
145}
146
147static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu)
148{
149 return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48;
150}
151
152static inline u8 ctxt_virt_addr_bits(struct x86_emulate_ctxt *ctxt)
153{
154 return (ctxt->ops->get_cr(ctxt, 4) & X86_CR4_LA57) ? 57 : 48;
155}
156
157static inline u64 get_canonical(u64 la, u8 vaddr_bits)
158{
159 return ((int64_t)la << (64 - vaddr_bits)) >> (64 - vaddr_bits);
160}
161
162static inline bool is_noncanonical_address(u64 la, struct kvm_vcpu *vcpu)
163{
164#ifdef CONFIG_X86_64
165 return get_canonical(la, vcpu_virt_addr_bits(vcpu)) != la;
166#else
167 return false;
168#endif
169}
170
171static inline bool emul_is_noncanonical_address(u64 la,
172 struct x86_emulate_ctxt *ctxt)
173{
174#ifdef CONFIG_X86_64
175 return get_canonical(la, ctxt_virt_addr_bits(ctxt)) != la;
176#else
177 return false;
178#endif
179}
180
181static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
182 gva_t gva, gfn_t gfn, unsigned access)
183{
184
185
186
187
188 vcpu->arch.mmio_gva = mmu_is_nested(vcpu) ? 0 : gva & PAGE_MASK;
189 vcpu->arch.access = access;
190 vcpu->arch.mmio_gfn = gfn;
191 vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation;
192}
193
194static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu)
195{
196 return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation;
197}
198
199
200
201
202
203#define MMIO_GVA_ANY (~(gva_t)0)
204
205static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
206{
207 if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
208 return;
209
210 vcpu->arch.mmio_gva = 0;
211}
212
213static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
214{
215 if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva &&
216 vcpu->arch.mmio_gva == (gva & PAGE_MASK))
217 return true;
218
219 return false;
220}
221
222static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
223{
224 if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn &&
225 vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
226 return true;
227
228 return false;
229}
230
231static inline unsigned long kvm_register_readl(struct kvm_vcpu *vcpu,
232 enum kvm_reg reg)
233{
234 unsigned long val = kvm_register_read(vcpu, reg);
235
236 return is_64_bit_mode(vcpu) ? val : (u32)val;
237}
238
239static inline void kvm_register_writel(struct kvm_vcpu *vcpu,
240 enum kvm_reg reg,
241 unsigned long val)
242{
243 if (!is_64_bit_mode(vcpu))
244 val = (u32)val;
245 return kvm_register_write(vcpu, reg, val);
246}
247
248static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk)
249{
250 return !(kvm->arch.disabled_quirks & quirk);
251}
252
253void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
254int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
255
256void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr);
257u64 get_kvmclock_ns(struct kvm *kvm);
258
259int kvm_read_guest_virt(struct kvm_vcpu *vcpu,
260 gva_t addr, void *val, unsigned int bytes,
261 struct x86_exception *exception);
262
263int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu,
264 gva_t addr, void *val, unsigned int bytes,
265 struct x86_exception *exception);
266
267int handle_ud(struct kvm_vcpu *vcpu);
268
269void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu);
270u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
271bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);
272int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
273int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
274bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn,
275 int page_num);
276bool kvm_vector_hashing_enabled(void);
277int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
278 int emulation_type, void *insn, int insn_len);
279
280#define KVM_SUPPORTED_XCR0 (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
281 | XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \
282 | XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512 \
283 | XFEATURE_MASK_PKRU)
284extern u64 host_xcr0;
285
286extern u64 kvm_supported_xcr0(void);
287
288extern unsigned int min_timer_period_us;
289
290extern unsigned int lapic_timer_advance_ns;
291
292extern bool enable_vmware_backdoor;
293
294extern struct static_key kvm_no_apic_vcpu;
295
296static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
297{
298 return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
299 vcpu->arch.virtual_tsc_shift);
300}
301
302
303
304
305
306
307#define do_shl32_div32(n, base) \
308 ({ \
309 u32 __quot, __rem; \
310 asm("divl %2" : "=a" (__quot), "=d" (__rem) \
311 : "rm" (base), "0" (0), "1" ((u32) n)); \
312 n = __quot; \
313 __rem; \
314 })
315
316static inline bool kvm_mwait_in_guest(struct kvm *kvm)
317{
318 return kvm->arch.mwait_in_guest;
319}
320
321static inline bool kvm_hlt_in_guest(struct kvm *kvm)
322{
323 return kvm->arch.hlt_in_guest;
324}
325
326static inline bool kvm_pause_in_guest(struct kvm *kvm)
327{
328 return kvm->arch.pause_in_guest;
329}
330
331DECLARE_PER_CPU(struct kvm_vcpu *, current_vcpu);
332
333static inline void kvm_before_interrupt(struct kvm_vcpu *vcpu)
334{
335 __this_cpu_write(current_vcpu, vcpu);
336}
337
338static inline void kvm_after_interrupt(struct kvm_vcpu *vcpu)
339{
340 __this_cpu_write(current_vcpu, NULL);
341}
342
343#endif
344
