1edf88417SAvi Kivity #ifndef __KVM_X86_MMU_H 2edf88417SAvi Kivity #define __KVM_X86_MMU_H 3edf88417SAvi Kivity 4edf88417SAvi Kivity #include <linux/kvm_host.h> 5fc78f519SAvi Kivity #include "kvm_cache_regs.h" 6edf88417SAvi Kivity 78c6d6adcSSheng Yang #define PT64_PT_BITS 9 88c6d6adcSSheng Yang #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS) 98c6d6adcSSheng Yang #define PT32_PT_BITS 10 108c6d6adcSSheng Yang #define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS) 118c6d6adcSSheng Yang 128c6d6adcSSheng Yang #define PT_WRITABLE_SHIFT 1 138c6d6adcSSheng Yang 148c6d6adcSSheng Yang #define PT_PRESENT_MASK (1ULL << 0) 158c6d6adcSSheng Yang #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT) 168c6d6adcSSheng Yang #define PT_USER_MASK (1ULL << 2) 178c6d6adcSSheng Yang #define PT_PWT_MASK (1ULL << 3) 188c6d6adcSSheng Yang #define PT_PCD_MASK (1ULL << 4) 191b7fcd32SAvi Kivity #define PT_ACCESSED_SHIFT 5 201b7fcd32SAvi Kivity #define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT) 218ea667f2SAvi Kivity #define PT_DIRTY_SHIFT 6 228ea667f2SAvi Kivity #define PT_DIRTY_MASK (1ULL << PT_DIRTY_SHIFT) 23*6fd01b71SAvi Kivity #define PT_PAGE_SIZE_SHIFT 7 24*6fd01b71SAvi Kivity #define PT_PAGE_SIZE_MASK (1ULL << PT_PAGE_SIZE_SHIFT) 258c6d6adcSSheng Yang #define PT_PAT_MASK (1ULL << 7) 268c6d6adcSSheng Yang #define PT_GLOBAL_MASK (1ULL << 8) 278c6d6adcSSheng Yang #define PT64_NX_SHIFT 63 288c6d6adcSSheng Yang #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT) 298c6d6adcSSheng Yang 308c6d6adcSSheng Yang #define PT_PAT_SHIFT 7 318c6d6adcSSheng Yang #define PT_DIR_PAT_SHIFT 12 328c6d6adcSSheng Yang #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT) 338c6d6adcSSheng Yang 348c6d6adcSSheng Yang #define PT32_DIR_PSE36_SIZE 4 358c6d6adcSSheng Yang #define PT32_DIR_PSE36_SHIFT 13 368c6d6adcSSheng Yang #define PT32_DIR_PSE36_MASK \ 378c6d6adcSSheng Yang (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT) 388c6d6adcSSheng Yang 398c6d6adcSSheng Yang #define PT64_ROOT_LEVEL 4 408c6d6adcSSheng Yang #define PT32_ROOT_LEVEL 2 418c6d6adcSSheng Yang #define PT32E_ROOT_LEVEL 3 428c6d6adcSSheng Yang 43c9c54174SSheng Yang #define PT_PDPE_LEVEL 3 44c9c54174SSheng Yang #define PT_DIRECTORY_LEVEL 2 45c9c54174SSheng Yang #define PT_PAGE_TABLE_LEVEL 1 46c9c54174SSheng Yang 471871c602SGleb Natapov #define PFERR_PRESENT_MASK (1U << 0) 481871c602SGleb Natapov #define PFERR_WRITE_MASK (1U << 1) 491871c602SGleb Natapov #define PFERR_USER_MASK (1U << 2) 501871c602SGleb Natapov #define PFERR_RSVD_MASK (1U << 3) 511871c602SGleb Natapov #define PFERR_FETCH_MASK (1U << 4) 521871c602SGleb Natapov 5394d8b056SMarcelo Tosatti int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]); 54ce88decfSXiao Guangrong void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask); 55ce88decfSXiao Guangrong int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct); 5652fde8dfSJoerg Roedel int kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context); 5794d8b056SMarcelo Tosatti 58e0df7b9fSDave Hansen static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm) 59e0df7b9fSDave Hansen { 6049d5ca26SDave Hansen return kvm->arch.n_max_mmu_pages - 6149d5ca26SDave Hansen kvm->arch.n_used_mmu_pages; 62e0df7b9fSDave Hansen } 63e0df7b9fSDave Hansen 64edf88417SAvi Kivity static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu) 65edf88417SAvi Kivity { 66e0df7b9fSDave Hansen if (unlikely(kvm_mmu_available_pages(vcpu->kvm)< KVM_MIN_FREE_MMU_PAGES)) 67edf88417SAvi Kivity __kvm_mmu_free_some_pages(vcpu); 68edf88417SAvi Kivity } 69edf88417SAvi Kivity 70edf88417SAvi Kivity static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu) 71edf88417SAvi Kivity { 72edf88417SAvi Kivity if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE)) 73edf88417SAvi Kivity return 0; 74edf88417SAvi Kivity 75edf88417SAvi Kivity return kvm_mmu_load(vcpu); 76edf88417SAvi Kivity } 77edf88417SAvi Kivity 7843a3795aSAvi Kivity static inline int is_present_gpte(unsigned long pte) 7920c466b5SDong, Eddie { 8020c466b5SDong, Eddie return pte & PT_PRESENT_MASK; 8120c466b5SDong, Eddie } 8220c466b5SDong, Eddie 83bebb106aSXiao Guangrong static inline int is_writable_pte(unsigned long pte) 84bebb106aSXiao Guangrong { 85bebb106aSXiao Guangrong return pte & PT_WRITABLE_MASK; 86bebb106aSXiao Guangrong } 87bebb106aSXiao Guangrong 88bebb106aSXiao Guangrong static inline bool is_write_protection(struct kvm_vcpu *vcpu) 89bebb106aSXiao Guangrong { 90bebb106aSXiao Guangrong return kvm_read_cr0_bits(vcpu, X86_CR0_WP); 91bebb106aSXiao Guangrong } 92bebb106aSXiao Guangrong 9397d64b78SAvi Kivity /* 9497d64b78SAvi Kivity * Will a fault with a given page-fault error code (pfec) cause a permission 9597d64b78SAvi Kivity * fault with the given access (in ACC_* format)? 9697d64b78SAvi Kivity */ 9797d64b78SAvi Kivity static inline bool permission_fault(struct kvm_mmu *mmu, unsigned pte_access, 9897d64b78SAvi Kivity unsigned pfec) 99bebb106aSXiao Guangrong { 10097d64b78SAvi Kivity return (mmu->permissions[pfec >> 1] >> pte_access) & 1; 101bebb106aSXiao Guangrong } 10297d64b78SAvi Kivity 103edf88417SAvi Kivity #endif 104