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[J-linux.git] / arch / x86 / kvm / mmu / tdp_mmu.h
1 // SPDX-License-Identifier: GPL-2.0
2
3 #ifndef __KVM_X86_MMU_TDP_MMU_H
4 #define __KVM_X86_MMU_TDP_MMU_H
5
6 #include <linux/kvm_host.h>
7
8 #include "spte.h"
9
10 void kvm_mmu_init_tdp_mmu(struct kvm *kvm);
11 void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm);
12
13 int kvm_tdp_mmu_alloc_root(struct kvm_vcpu *vcpu);
14
15 __must_check static inline bool kvm_tdp_mmu_get_root(struct kvm_mmu_page *root)
16 {
17         return refcount_inc_not_zero(&root->tdp_mmu_root_count);
18 }
19
20 void kvm_tdp_mmu_put_root(struct kvm *kvm, struct kvm_mmu_page *root);
21
22 bool kvm_tdp_mmu_zap_leafs(struct kvm *kvm, gfn_t start, gfn_t end, bool flush);
23 bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp);
24 void kvm_tdp_mmu_zap_all(struct kvm *kvm);
25 void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm);
26 void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm);
27
28 int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
29
30 bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
31                                  bool flush);
32 bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range);
33 bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
34
35 bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm,
36                              const struct kvm_memory_slot *slot, int min_level);
37 void kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm,
38                                   const struct kvm_memory_slot *slot);
39 void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm,
40                                        struct kvm_memory_slot *slot,
41                                        gfn_t gfn, unsigned long mask,
42                                        bool wrprot);
43 void kvm_tdp_mmu_recover_huge_pages(struct kvm *kvm,
44                                     const struct kvm_memory_slot *slot);
45
46 bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm,
47                                    struct kvm_memory_slot *slot, gfn_t gfn,
48                                    int min_level);
49
50 void kvm_tdp_mmu_try_split_huge_pages(struct kvm *kvm,
51                                       const struct kvm_memory_slot *slot,
52                                       gfn_t start, gfn_t end,
53                                       int target_level, bool shared);
54
55 static inline void kvm_tdp_mmu_walk_lockless_begin(void)
56 {
57         rcu_read_lock();
58 }
59
60 static inline void kvm_tdp_mmu_walk_lockless_end(void)
61 {
62         rcu_read_unlock();
63 }
64
65 int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
66                          int *root_level);
67 u64 *kvm_tdp_mmu_fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, gfn_t gfn,
68                                         u64 *spte);
69
70 #ifdef CONFIG_X86_64
71 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; }
72 #else
73 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; }
74 #endif
75
76 #endif /* __KVM_X86_MMU_TDP_MMU_H */
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