/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __KVM_X86_MMU_INTERNAL_H #define __KVM_X86_MMU_INTERNAL_H #include <linux/types.h> #include <asm/kvm_host.h> struct kvm_mmu_page { struct list_head link; struct hlist_node hash_link; struct list_head lpage_disallowed_link; bool unsync; u8 mmu_valid_gen; bool mmio_cached; bool lpage_disallowed; /* Can't be replaced by an equiv large page */ /* * The following two entries are used to key the shadow page in the * hash table. */ union kvm_mmu_page_role role; gfn_t gfn; u64 *spt; /* hold the gfn of each spte inside spt */ gfn_t *gfns; int root_count; /* Currently serving as active root */ unsigned int unsync_children; struct kvm_rmap_head parent_ptes; /* rmap pointers to parent sptes */ DECLARE_BITMAP(unsync_child_bitmap, 512); #ifdef CONFIG_X86_32 /* * Used out of the mmu-lock to avoid reading spte values while an * update is in progress; see the comments in __get_spte_lockless(). */ int clear_spte_count; #endif /* Number of writes since the last time traversal visited this page. */ atomic_t write_flooding_count; }; static inline struct kvm_mmu_page *to_shadow_page(hpa_t shadow_page) { struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); return (struct kvm_mmu_page *)page_private(page); } static inline struct kvm_mmu_page *sptep_to_sp(u64 *sptep) { return to_shadow_page(__pa(sptep)); } void kvm_mmu_gfn_disallow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); void kvm_mmu_gfn_allow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, struct kvm_memory_slot *slot, u64 gfn); #endif /* __KVM_X86_MMU_INTERNAL_H */