1 // SPDX-License-Identifier: GPL-2.0
3 #ifndef __KVM_X86_MMU_TDP_MMU_H
4 #define __KVM_X86_MMU_TDP_MMU_H
6 #include <linux/kvm_host.h>
8 hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu);
10 __must_check static inline bool kvm_tdp_mmu_get_root(struct kvm *kvm,
11 struct kvm_mmu_page *root)
13 if (root->role.invalid)
16 return refcount_inc_not_zero(&root->tdp_mmu_root_count);
19 void kvm_tdp_mmu_put_root(struct kvm *kvm, struct kvm_mmu_page *root,
22 bool __kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, int as_id, gfn_t start,
23 gfn_t end, bool can_yield, bool flush,
25 static inline bool kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, int as_id,
26 gfn_t start, gfn_t end, bool flush,
29 return __kvm_tdp_mmu_zap_gfn_range(kvm, as_id, start, end, true, flush,
32 static inline bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp)
34 gfn_t end = sp->gfn + KVM_PAGES_PER_HPAGE(sp->role.level + 1);
37 * Don't allow yielding, as the caller may have a flush pending. Note,
38 * if mmu_lock is held for write, zapping will never yield in this case,
39 * but explicitly disallow it for safety. The TDP MMU does not yield
40 * until it has made forward progress (steps sideways), and when zapping
41 * a single shadow page that it's guaranteed to see (thus the mmu_lock
42 * requirement), its "step sideways" will always step beyond the bounds
43 * of the shadow page's gfn range and stop iterating before yielding.
45 lockdep_assert_held_write(&kvm->mmu_lock);
46 return __kvm_tdp_mmu_zap_gfn_range(kvm, kvm_mmu_page_as_id(sp),
47 sp->gfn, end, false, false, false);
50 void kvm_tdp_mmu_zap_all(struct kvm *kvm);
51 void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm);
52 void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm);
54 int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
55 int map_writable, int max_level, kvm_pfn_t pfn,
58 bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
60 bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range);
61 bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
62 bool kvm_tdp_mmu_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
64 bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm, struct kvm_memory_slot *slot,
66 bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm,
67 struct kvm_memory_slot *slot);
68 void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm,
69 struct kvm_memory_slot *slot,
70 gfn_t gfn, unsigned long mask,
72 bool kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm,
73 const struct kvm_memory_slot *slot,
76 bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm,
77 struct kvm_memory_slot *slot, gfn_t gfn,
80 int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
84 bool kvm_mmu_init_tdp_mmu(struct kvm *kvm);
85 void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm);
86 static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return kvm->arch.tdp_mmu_enabled; }
87 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; }
89 static inline bool is_tdp_mmu(struct kvm_mmu *mmu)
91 struct kvm_mmu_page *sp;
92 hpa_t hpa = mmu->root_hpa;
94 if (WARN_ON(!VALID_PAGE(hpa)))
98 * A NULL shadow page is legal when shadowing a non-paging guest with
99 * PAE paging, as the MMU will be direct with root_hpa pointing at the
100 * pae_root page, not a shadow page.
102 sp = to_shadow_page(hpa);
103 return sp && is_tdp_mmu_page(sp) && sp->root_count;
106 static inline bool kvm_mmu_init_tdp_mmu(struct kvm *kvm) { return false; }
107 static inline void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm) {}
108 static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return false; }
109 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; }
110 static inline bool is_tdp_mmu(struct kvm_mmu *mmu) { return false; }
113 #endif /* __KVM_X86_MMU_TDP_MMU_H */