#ifndef __KVM_X86_MMU_H #define __KVM_X86_MMU_H #include <linux/kvm_host.h> #include "kvm_cache_regs.h" #define PT64_PT_BITS 9 #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS) #define PT32_PT_BITS 10 #define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS) #define PT_WRITABLE_SHIFT 1 #define PT_PRESENT_MASK (1ULL << 0) #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT) #define PT_USER_MASK (1ULL << 2) #define PT_PWT_MASK (1ULL << 3) #define PT_PCD_MASK (1ULL << 4) #define PT_ACCESSED_SHIFT 5 #define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT) #define PT_DIRTY_SHIFT 6 #define PT_DIRTY_MASK (1ULL << PT_DIRTY_SHIFT) #define PT_PAGE_SIZE_SHIFT 7 #define PT_PAGE_SIZE_MASK (1ULL << PT_PAGE_SIZE_SHIFT) #define PT_PAT_MASK (1ULL << 7) #define PT_GLOBAL_MASK (1ULL << 8) #define PT64_NX_SHIFT 63 #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT) #define PT_PAT_SHIFT 7 #define PT_DIR_PAT_SHIFT 12 #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT) #define PT32_DIR_PSE36_SIZE 4 #define PT32_DIR_PSE36_SHIFT 13 #define PT32_DIR_PSE36_MASK \ (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT) #define PT64_ROOT_LEVEL 4 #define PT32_ROOT_LEVEL 2 #define PT32E_ROOT_LEVEL 3 #define PT_PDPE_LEVEL 3 #define PT_DIRECTORY_LEVEL 2 #define PT_PAGE_TABLE_LEVEL 1 #define PFERR_PRESENT_MASK (1U << 0) #define PFERR_WRITE_MASK (1U << 1) #define PFERR_USER_MASK (1U << 2) #define PFERR_RSVD_MASK (1U << 3) #define PFERR_FETCH_MASK (1U << 4) int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]); void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask); /* * Return values of handle_mmio_page_fault_common: * RET_MMIO_PF_EMULATE: it is a real mmio page fault, emulate the instruction * directly. * RET_MMIO_PF_INVALID: invalid spte is detected then let the real page * fault path update the mmio spte. * RET_MMIO_PF_RETRY: let CPU fault again on the address. * RET_MMIO_PF_BUG: bug is detected. */ enum { RET_MMIO_PF_EMULATE = 1, RET_MMIO_PF_INVALID = 2, RET_MMIO_PF_RETRY = 0, RET_MMIO_PF_BUG = -1 }; int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct); int kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context); int kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context, bool execonly); static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm) { if (kvm->arch.n_max_mmu_pages > kvm->arch.n_used_mmu_pages) return kvm->arch.n_max_mmu_pages - kvm->arch.n_used_mmu_pages; return 0; } static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu) { if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE)) return 0; return kvm_mmu_load(vcpu); } static inline int is_present_gpte(unsigned long pte) { return pte & PT_PRESENT_MASK; } static inline int is_writable_pte(unsigned long pte) { return pte & PT_WRITABLE_MASK; } static inline bool is_write_protection(struct kvm_vcpu *vcpu) { return kvm_read_cr0_bits(vcpu, X86_CR0_WP); } /* * Will a fault with a given page-fault error code (pfec) cause a permission * fault with the given access (in ACC_* format)? */ static inline bool permission_fault(struct kvm_mmu *mmu, unsigned pte_access, unsigned pfec) { return (mmu->permissions[pfec >> 1] >> pte_access) & 1; } void kvm_mmu_invalidate_zap_all_pages(struct kvm *kvm); #endif