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 hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(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                           bool shared);
  22
  23 bool kvm_tdp_mmu_zap_leafs(struct kvm *kvm, gfn_t start, gfn_t end, bool flush);
  24 bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp);
  25 void kvm_tdp_mmu_zap_all(struct kvm *kvm);
  26 void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm);
  27 void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm);
  28
  29 int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
  30
  31 bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
  32                                  bool flush);
  33 bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range);
  34 bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
  35 bool kvm_tdp_mmu_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
  36
  37 bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm,
  38                              const struct kvm_memory_slot *slot, int min_level);
  39 bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm,
  40                                   const struct kvm_memory_slot *slot);
  41 void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm,
  42                                        struct kvm_memory_slot *slot,
  43                                        gfn_t gfn, unsigned long mask,
  44                                        bool wrprot);
  45 void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm,
  46                                        const struct kvm_memory_slot *slot);
  47
  48 bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm,
  49                                    struct kvm_memory_slot *slot, gfn_t gfn,
  50                                    int min_level);
  51
  52 void kvm_tdp_mmu_try_split_huge_pages(struct kvm *kvm,
  53                                       const struct kvm_memory_slot *slot,
  54                                       gfn_t start, gfn_t end,
  55                                       int target_level, bool shared);
  56
  57 static inline void kvm_tdp_mmu_walk_lockless_begin(void)
  58 {
  59         rcu_read_lock();
  60 }
  61
  62 static inline void kvm_tdp_mmu_walk_lockless_end(void)
  63 {
  64         rcu_read_unlock();
  65 }
  66
  67 int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
  68                          int *root_level);
  69 u64 *kvm_tdp_mmu_fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, u64 addr,
  70                                         u64 *spte);
  71
  72 #ifdef CONFIG_X86_64
  73 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; }
  74 #else
  75 static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; }
  76 #endif
  77
  78 #endif /* __KVM_X86_MMU_TDP_MMU_H */