linux/arch/x86/kvm/mmu.h
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   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
  40static 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
  46static 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
  54static inline int is_long_mode(struct kvm_vcpu *vcpu)
  55{
  56#ifdef CONFIG_X86_64
  57        return vcpu->arch.shadow_efer & EFER_LME;
  58#else
  59        return 0;
  60#endif
  61}
  62
  63static inline int is_pae(struct kvm_vcpu *vcpu)
  64{
  65        return vcpu->arch.cr4 & X86_CR4_PAE;
  66}
  67
  68static inline int is_pse(struct kvm_vcpu *vcpu)
  69{
  70        return vcpu->arch.cr4 & X86_CR4_PSE;
  71}
  72
  73static inline int is_paging(struct kvm_vcpu *vcpu)
  74{
  75        return vcpu->arch.cr0 & X86_CR0_PG;
  76}
  77
  78#endif
  79