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
7static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
8{
9	vcpu->arch.exception.pending = false;
10}
11
12static 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
20static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
21{
22	vcpu->arch.interrupt.pending = false;
23}
24
25static 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
31static inline bool kvm_exception_is_soft(unsigned int nr)
32{
33	return (nr == BP_VECTOR) || (nr == OF_VECTOR);
34}
35
36static inline bool is_protmode(struct kvm_vcpu *vcpu)
37{
38	return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
39}
40
41static 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
50static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu)
51{
52	int cs_db, cs_l;
53
54	if (!is_long_mode(vcpu))
55		return false;
56	kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
57	return cs_l;
58}
59
60static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
61{
62	return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
63}
64
65static inline int is_pae(struct kvm_vcpu *vcpu)
66{
67	return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
68}
69
70static inline int is_pse(struct kvm_vcpu *vcpu)
71{
72	return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
73}
74
75static inline int is_paging(struct kvm_vcpu *vcpu)
76{
77	return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
78}
79
80static inline u32 bit(int bitno)
81{
82	return 1 << (bitno & 31);
83}
84
85static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
86					gva_t gva, gfn_t gfn, unsigned access)
87{
88	vcpu->arch.mmio_gva = gva & PAGE_MASK;
89	vcpu->arch.access = access;
90	vcpu->arch.mmio_gfn = gfn;
91	vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation;
92}
93
94static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu)
95{
96	return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation;
97}
98
99/*
100 * Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we
101 * clear all mmio cache info.
102 */
103#define MMIO_GVA_ANY (~(gva_t)0)
104
105static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
106{
107	if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
108		return;
109
110	vcpu->arch.mmio_gva = 0;
111}
112
113static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
114{
115	if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva &&
116	      vcpu->arch.mmio_gva == (gva & PAGE_MASK))
117		return true;
118
119	return false;
120}
121
122static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
123{
124	if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn &&
125	      vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
126		return true;
127
128	return false;
129}
130
131static inline unsigned long kvm_register_readl(struct kvm_vcpu *vcpu,
132					       enum kvm_reg reg)
133{
134	unsigned long val = kvm_register_read(vcpu, reg);
135
136	return is_64_bit_mode(vcpu) ? val : (u32)val;
137}
138
139static inline void kvm_register_writel(struct kvm_vcpu *vcpu,
140				       enum kvm_reg reg,
141				       unsigned long val)
142{
143	if (!is_64_bit_mode(vcpu))
144		val = (u32)val;
145	return kvm_register_write(vcpu, reg, val);
146}
147
148void kvm_before_handle_nmi(struct kvm_vcpu *vcpu);
149void kvm_after_handle_nmi(struct kvm_vcpu *vcpu);
150int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
151
152void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr);
153
154int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
155	gva_t addr, void *val, unsigned int bytes,
156	struct x86_exception *exception);
157
158int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
159	gva_t addr, void *val, unsigned int bytes,
160	struct x86_exception *exception);
161
162bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);
163
164#define KVM_SUPPORTED_XCR0     (XSTATE_FP | XSTATE_SSE | XSTATE_YMM \
165				| XSTATE_BNDREGS | XSTATE_BNDCSR)
166extern u64 host_xcr0;
167
168extern u64 kvm_supported_xcr0(void);
169
170extern unsigned int min_timer_period_us;
171
172extern struct static_key kvm_no_apic_vcpu;
173#endif
174