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