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 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
  41 {
  42         if (unlikely(vcpu->kvm->arch.n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
  43                 __kvm_mmu_free_some_pages(vcpu);
  44 }
  45
  46 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
  47 {
  48         if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
  49                 return 0;
  50
  51         return kvm_mmu_load(vcpu);
  52 }
  53
  54 static inline int is_long_mode(struct kvm_vcpu *vcpu)
  55 {
  56 #ifdef CONFIG_X86_64
  57         return vcpu->arch.shadow_efer & EFER_LMA;
  58 #else
  59         return 0;
  60 #endif
  61 }
  62
  63 static inline int is_pae(struct kvm_vcpu *vcpu)
  64 {
  65         return vcpu->arch.cr4 & X86_CR4_PAE;
  66 }
  67
  68 static inline int is_pse(struct kvm_vcpu *vcpu)
  69 {
  70         return vcpu->arch.cr4 & X86_CR4_PSE;
  71 }
  72
  73 static inline int is_paging(struct kvm_vcpu *vcpu)
  74 {
  75         return vcpu->arch.cr0 & X86_CR0_PG;
  76 }
  77
  78 static inline int is_present_pte(unsigned long pte)
  79 {
  80         return pte & PT_PRESENT_MASK;
  81 }
  82
  83 #endif