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 hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu); 11 12 __must_check static inline bool kvm_tdp_mmu_get_root(struct kvm_mmu_page *root) 13 { 14 return refcount_inc_not_zero(&root->tdp_mmu_root_count); 15 } 16 17 void kvm_tdp_mmu_put_root(struct kvm *kvm, struct kvm_mmu_page *root, 18 bool shared); 19 20 bool kvm_tdp_mmu_zap_leafs(struct kvm *kvm, int as_id, gfn_t start, 21 gfn_t end, bool can_yield, bool flush); 22 bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp); 23 void kvm_tdp_mmu_zap_all(struct kvm *kvm); 24 void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm); 25 void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm); 26 27 int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault); 28 29 bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range, 30 bool flush); 31 bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range); 32 bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range); 33 bool kvm_tdp_mmu_set_spte_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 bool 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_zap_collapsible_sptes(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, u64 addr, 68 u64 *spte); 69 70 #ifdef CONFIG_X86_64 71 int kvm_mmu_init_tdp_mmu(struct kvm *kvm); 72 void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm); 73 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; } 74 75 static inline bool is_tdp_mmu(struct kvm_mmu *mmu) 76 { 77 struct kvm_mmu_page *sp; 78 hpa_t hpa = mmu->root.hpa; 79 80 if (WARN_ON(!VALID_PAGE(hpa))) 81 return false; 82 83 /* 84 * A NULL shadow page is legal when shadowing a non-paging guest with 85 * PAE paging, as the MMU will be direct with root_hpa pointing at the 86 * pae_root page, not a shadow page. 87 */ 88 sp = to_shadow_page(hpa); 89 return sp && is_tdp_mmu_page(sp) && sp->root_count; 90 } 91 #else 92 static inline int kvm_mmu_init_tdp_mmu(struct kvm *kvm) { return 0; } 93 static inline void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm) {} 94 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; } 95 static inline bool is_tdp_mmu(struct kvm_mmu *mmu) { return false; } 96 #endif 97 98 #endif /* __KVM_X86_MMU_TDP_MMU_H */ 99