1 #ifndef __KVM_X86_MMU_H
2 #define __KVM_X86_MMU_H
3
4 #include <linux/kvm_host.h>
5
6 #define PT64_PT_BITS 9
7 #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS)
8 #define PT32_PT_BITS 10
9 #define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS)
10
11 #define PT_WRITABLE_SHIFT 1
12
13 #define PT_PRESENT_MASK (1ULL << 0)
14 #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
15 #define PT_USER_MASK (1ULL << 2)
16 #define PT_PWT_MASK (1ULL << 3)
17 #define PT_PCD_MASK (1ULL << 4)
18 #define PT_ACCESSED_SHIFT 5
19 #define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT)
20 #define PT_DIRTY_MASK (1ULL << 6)
21 #define PT_PAGE_SIZE_MASK (1ULL << 7)
22 #define PT_PAT_MASK (1ULL << 7)
23 #define PT_GLOBAL_MASK (1ULL << 8)
24 #define PT64_NX_SHIFT 63
25 #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT)
26
27 #define PT_PAT_SHIFT 7
28 #define PT_DIR_PAT_SHIFT 12
29 #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT)
30
31 #define PT32_DIR_PSE36_SIZE 4
32 #define PT32_DIR_PSE36_SHIFT 13
33 #define PT32_DIR_PSE36_MASK \
34 (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
35
36 #define PT64_ROOT_LEVEL 4
37 #define PT32_ROOT_LEVEL 2
38 #define PT32E_ROOT_LEVEL 3
39
40 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
41 {
42 if (unlikely(vcpu->kvm->arch.n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
43 __kvm_mmu_free_some_pages(vcpu);
44 }
45
46 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
47 {
48 if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
49 return 0;
50
51 return kvm_mmu_load(vcpu);
52 }
53
54 static inline int is_long_mode(struct kvm_vcpu *vcpu)
55 {
56 #ifdef CONFIG_X86_64
57 return vcpu->arch.shadow_efer & EFER_LMA;
58 #else
59 return 0;
60 #endif
61 }
62
63 static inline int is_pae(struct kvm_vcpu *vcpu)
64 {
65 return vcpu->arch.cr4 & X86_CR4_PAE;
66 }
67
68 static inline int is_pse(struct kvm_vcpu *vcpu)
69 {
70 return vcpu->arch.cr4 & X86_CR4_PSE;
71 }
72
73 static inline int is_paging(struct kvm_vcpu *vcpu)
74 {
75 return vcpu->arch.cr0 & X86_CR0_PG;
76 }
77
78 static inline int is_present_pte(unsigned long pte)
79 {
80 return pte & PT_PRESENT_MASK;
81 }
82
83 #endif
84
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