xref: /openbmc/linux/arch/x86/kvm/x86.h (revision e23feb16)
1 #ifndef ARCH_X86_KVM_X86_H
2 #define ARCH_X86_KVM_X86_H
3 
4 #include <linux/kvm_host.h>
5 #include "kvm_cache_regs.h"
6 
7 static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
8 {
9 	vcpu->arch.exception.pending = false;
10 }
11 
12 static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector,
13 	bool soft)
14 {
15 	vcpu->arch.interrupt.pending = true;
16 	vcpu->arch.interrupt.soft = soft;
17 	vcpu->arch.interrupt.nr = vector;
18 }
19 
20 static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
21 {
22 	vcpu->arch.interrupt.pending = false;
23 }
24 
25 static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
26 {
27 	return vcpu->arch.exception.pending || vcpu->arch.interrupt.pending ||
28 		vcpu->arch.nmi_injected;
29 }
30 
31 static inline bool kvm_exception_is_soft(unsigned int nr)
32 {
33 	return (nr == BP_VECTOR) || (nr == OF_VECTOR);
34 }
35 
36 static inline bool is_protmode(struct kvm_vcpu *vcpu)
37 {
38 	return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
39 }
40 
41 static inline int is_long_mode(struct kvm_vcpu *vcpu)
42 {
43 #ifdef CONFIG_X86_64
44 	return vcpu->arch.efer & EFER_LMA;
45 #else
46 	return 0;
47 #endif
48 }
49 
50 static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
51 {
52 	return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
53 }
54 
55 static inline int is_pae(struct kvm_vcpu *vcpu)
56 {
57 	return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
58 }
59 
60 static inline int is_pse(struct kvm_vcpu *vcpu)
61 {
62 	return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
63 }
64 
65 static inline int is_paging(struct kvm_vcpu *vcpu)
66 {
67 	return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
68 }
69 
70 static inline u32 bit(int bitno)
71 {
72 	return 1 << (bitno & 31);
73 }
74 
75 static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
76 					gva_t gva, gfn_t gfn, unsigned access)
77 {
78 	vcpu->arch.mmio_gva = gva & PAGE_MASK;
79 	vcpu->arch.access = access;
80 	vcpu->arch.mmio_gfn = gfn;
81 }
82 
83 /*
84  * Clear the mmio cache info for the given gva,
85  * specially, if gva is ~0ul, we clear all mmio cache info.
86  */
87 static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
88 {
89 	if (gva != (~0ul) && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
90 		return;
91 
92 	vcpu->arch.mmio_gva = 0;
93 }
94 
95 static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
96 {
97 	if (vcpu->arch.mmio_gva && vcpu->arch.mmio_gva == (gva & PAGE_MASK))
98 		return true;
99 
100 	return false;
101 }
102 
103 static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
104 {
105 	if (vcpu->arch.mmio_gfn && vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
106 		return true;
107 
108 	return false;
109 }
110 
111 void kvm_before_handle_nmi(struct kvm_vcpu *vcpu);
112 void kvm_after_handle_nmi(struct kvm_vcpu *vcpu);
113 int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
114 
115 void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr);
116 
117 int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
118 	gva_t addr, void *val, unsigned int bytes,
119 	struct x86_exception *exception);
120 
121 int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
122 	gva_t addr, void *val, unsigned int bytes,
123 	struct x86_exception *exception);
124 
125 extern u64 host_xcr0;
126 
127 extern struct static_key kvm_no_apic_vcpu;
128 #endif
129