1 #ifndef __KVM_X86_MMU_H
2 #define __KVM_X86_MMU_H
3 
4 #include <linux/kvm_host.h>
5 #include "kvm_cache_regs.h"
6 
7 #define PT64_PT_BITS 9
8 #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS)
9 #define PT32_PT_BITS 10
10 #define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS)
11 
12 #define PT_WRITABLE_SHIFT 1
13 
14 #define PT_PRESENT_MASK (1ULL << 0)
15 #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
16 #define PT_USER_MASK (1ULL << 2)
17 #define PT_PWT_MASK (1ULL << 3)
18 #define PT_PCD_MASK (1ULL << 4)
19 #define PT_ACCESSED_SHIFT 5
20 #define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT)
21 #define PT_DIRTY_MASK (1ULL << 6)
22 #define PT_PAGE_SIZE_MASK (1ULL << 7)
23 #define PT_PAT_MASK (1ULL << 7)
24 #define PT_GLOBAL_MASK (1ULL << 8)
25 #define PT64_NX_SHIFT 63
26 #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT)
27 
28 #define PT_PAT_SHIFT 7
29 #define PT_DIR_PAT_SHIFT 12
30 #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT)
31 
32 #define PT32_DIR_PSE36_SIZE 4
33 #define PT32_DIR_PSE36_SHIFT 13
34 #define PT32_DIR_PSE36_MASK \
35 	(((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
36 
37 #define PT64_ROOT_LEVEL 4
38 #define PT32_ROOT_LEVEL 2
39 #define PT32E_ROOT_LEVEL 3
40 
41 #define PT_PDPE_LEVEL 3
42 #define PT_DIRECTORY_LEVEL 2
43 #define PT_PAGE_TABLE_LEVEL 1
44 
45 #define PFERR_PRESENT_MASK (1U << 0)
46 #define PFERR_WRITE_MASK (1U << 1)
47 #define PFERR_USER_MASK (1U << 2)
48 #define PFERR_RSVD_MASK (1U << 3)
49 #define PFERR_FETCH_MASK (1U << 4)
50 
51 int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
52 int kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context);
53 
kvm_mmu_available_pages(struct kvm * kvm)54 static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm)
55 {
56 	return kvm->arch.n_max_mmu_pages -
57 		kvm->arch.n_used_mmu_pages;
58 }
59 
kvm_mmu_free_some_pages(struct kvm_vcpu * vcpu)60 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
61 {
62 	if (unlikely(kvm_mmu_available_pages(vcpu->kvm)< KVM_MIN_FREE_MMU_PAGES))
63 		__kvm_mmu_free_some_pages(vcpu);
64 }
65 
kvm_mmu_reload(struct kvm_vcpu * vcpu)66 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
67 {
68 	if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
69 		return 0;
70 
71 	return kvm_mmu_load(vcpu);
72 }
73 
is_present_gpte(unsigned long pte)74 static inline int is_present_gpte(unsigned long pte)
75 {
76 	return pte & PT_PRESENT_MASK;
77 }
78 
79 #endif
80