| /* 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 */ |