arch/x86/kvm/mmu.h

   1 #ifndef __KVM_X86_MMU_H
   2 #define __KVM_X86_MMU_H
   3
   4 #include <linux/kvm_host.h>
   5
   6 #define PT64_PT_BITS 9
   7 #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS)
   8 #define PT32_PT_BITS 10
   9 #define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS)
  10
  11 #define PT_WRITABLE_SHIFT 1
  12
  13 #define PT_PRESENT_MASK (1ULL << 0)
  14 #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
  15 #define PT_USER_MASK (1ULL << 2)
  16 #define PT_PWT_MASK (1ULL << 3)
  17 #define PT_PCD_MASK (1ULL << 4)
  18 #define PT_ACCESSED_SHIFT 5
  19 #define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT)
  20 #define PT_DIRTY_MASK (1ULL << 6)
  21 #define PT_PAGE_SIZE_MASK (1ULL << 7)
  22 #define PT_PAT_MASK (1ULL << 7)
  23 #define PT_GLOBAL_MASK (1ULL << 8)
  24 #define PT64_NX_SHIFT 63
  25 #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT)
  26
  27 #define PT_PAT_SHIFT 7
  28 #define PT_DIR_PAT_SHIFT 12
  29 #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT)
  30
  31 #define PT32_DIR_PSE36_SIZE 4
  32 #define PT32_DIR_PSE36_SHIFT 13
  33 #define PT32_DIR_PSE36_MASK \
  34         (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
  35
  36 #define PT64_ROOT_LEVEL 4
  37 #define PT32_ROOT_LEVEL 2
  38 #define PT32E_ROOT_LEVEL 3
  39
  40 int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
  41
  42 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
  43 {
  44         if (unlikely(vcpu->kvm->arch.n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
  45                 __kvm_mmu_free_some_pages(vcpu);
  46 }
  47
  48 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
  49 {
  50         if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
  51                 return 0;
  52
  53         return kvm_mmu_load(vcpu);
  54 }
  55
  56 static inline int is_long_mode(struct kvm_vcpu *vcpu)
  57 {
  58 #ifdef CONFIG_X86_64
  59         return vcpu->arch.shadow_efer & EFER_LMA;
  60 #else
  61         return 0;
  62 #endif
  63 }
  64
  65 static inline int is_pae(struct kvm_vcpu *vcpu)
  66 {
  67         return vcpu->arch.cr4 & X86_CR4_PAE;
  68 }
  69
  70 static inline int is_pse(struct kvm_vcpu *vcpu)
  71 {
  72         return vcpu->arch.cr4 & X86_CR4_PSE;
  73 }
  74
  75 static inline int is_paging(struct kvm_vcpu *vcpu)
  76 {
  77         return vcpu->arch.cr0 & X86_CR0_PG;
  78 }
  79
  80 static inline int is_present_gpte(unsigned long pte)
  81 {
  82         return pte & PT_PRESENT_MASK;
  83 }
  84
  85 #endif