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 hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu); 9 10 __must_check static inline bool kvm_tdp_mmu_get_root(struct kvm_mmu_page *root) 11 { 12 return refcount_inc_not_zero(&root->tdp_mmu_root_count); 13 } 14 15 void kvm_tdp_mmu_put_root(struct kvm *kvm, struct kvm_mmu_page *root, 16 bool shared); 17 18 bool kvm_tdp_mmu_zap_leafs(struct kvm *kvm, int as_id, gfn_t start, 19 gfn_t end, bool can_yield, bool flush); 20 bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp); 21 void kvm_tdp_mmu_zap_all(struct kvm *kvm); 22 void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm); 23 void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm); 24 25 int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault); 26 27 bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range, 28 bool flush); 29 bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range); 30 bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range); 31 bool kvm_tdp_mmu_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range); 32 33 bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm, 34 const struct kvm_memory_slot *slot, int min_level); 35 bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm, 36 const struct kvm_memory_slot *slot); 37 void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm, 38 struct kvm_memory_slot *slot, 39 gfn_t gfn, unsigned long mask, 40 bool wrprot); 41 void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm, 42 const struct kvm_memory_slot *slot); 43 44 bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, 45 struct kvm_memory_slot *slot, gfn_t gfn, 46 int min_level); 47 48 void kvm_tdp_mmu_try_split_huge_pages(struct kvm *kvm, 49 const struct kvm_memory_slot *slot, 50 gfn_t start, gfn_t end, 51 int target_level, bool shared); 52 53 static inline void kvm_tdp_mmu_walk_lockless_begin(void) 54 { 55 rcu_read_lock(); 56 } 57 58 static inline void kvm_tdp_mmu_walk_lockless_end(void) 59 { 60 rcu_read_unlock(); 61 } 62 63 int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, 64 int *root_level); 65 u64 *kvm_tdp_mmu_fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, u64 addr, 66 u64 *spte); 67 68 #ifdef CONFIG_X86_64 69 int kvm_mmu_init_tdp_mmu(struct kvm *kvm); 70 void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm); 71 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; } 72 73 static inline bool is_tdp_mmu(struct kvm_mmu *mmu) 74 { 75 struct kvm_mmu_page *sp; 76 hpa_t hpa = mmu->root.hpa; 77 78 if (WARN_ON(!VALID_PAGE(hpa))) 79 return false; 80 81 /* 82 * A NULL shadow page is legal when shadowing a non-paging guest with 83 * PAE paging, as the MMU will be direct with root_hpa pointing at the 84 * pae_root page, not a shadow page. 85 */ 86 sp = to_shadow_page(hpa); 87 return sp && is_tdp_mmu_page(sp) && sp->root_count; 88 } 89 #else 90 static inline int kvm_mmu_init_tdp_mmu(struct kvm *kvm) { return 0; } 91 static inline void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm) {} 92 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; } 93 static inline bool is_tdp_mmu(struct kvm_mmu *mmu) { return false; } 94 #endif 95 96 #endif /* __KVM_X86_MMU_TDP_MMU_H */ 97