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_MASK (1ULL << 5)
  19 #define PT_DIRTY_MASK (1ULL << 6)
  20 #define PT_PAGE_SIZE_MASK (1ULL << 7)
  21 #define PT_PAT_MASK (1ULL << 7)
  22 #define PT_GLOBAL_MASK (1ULL << 8)
  23 #define PT64_NX_SHIFT 63
  24 #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT)
  25
  26 #define PT_PAT_SHIFT 7
  27 #define PT_DIR_PAT_SHIFT 12
  28 #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT)
  29
  30 #define PT32_DIR_PSE36_SIZE 4
  31 #define PT32_DIR_PSE36_SHIFT 13
  32 #define PT32_DIR_PSE36_MASK \
  33         (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
  34
  35 #define PT64_ROOT_LEVEL 4
  36 #define PT32_ROOT_LEVEL 2
  37 #define PT32E_ROOT_LEVEL 3
  38
  39 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
  40 {
  41         if (unlikely(vcpu->kvm->arch.n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
  42                 __kvm_mmu_free_some_pages(vcpu);
  43 }
  44
  45 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
  46 {
  47         if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
  48                 return 0;
  49
  50         return kvm_mmu_load(vcpu);
  51 }
  52
  53 static inline int is_long_mode(struct kvm_vcpu *vcpu)
  54 {
  55 #ifdef CONFIG_X86_64
  56         return vcpu->arch.shadow_efer & EFER_LME;
  57 #else
  58         return 0;
  59 #endif
  60 }
  61
  62 static inline int is_pae(struct kvm_vcpu *vcpu)
  63 {
  64         return vcpu->arch.cr4 & X86_CR4_PAE;
  65 }
  66
  67 static inline int is_pse(struct kvm_vcpu *vcpu)
  68 {
  69         return vcpu->arch.cr4 & X86_CR4_PSE;
  70 }
  71
  72 static inline int is_paging(struct kvm_vcpu *vcpu)
  73 {
  74         return vcpu->arch.cr0 & X86_CR0_PG;
  75 }
  76
  77 #endif