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 #include "kvm_cache_regs.h"
   6
   7 #define PT64_PT_BITS 9
   8 #define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS)
   9 #define PT32_PT_BITS 10
  10 #define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS)
  11
  12 #define PT_WRITABLE_SHIFT 1
  13
  14 #define PT_PRESENT_MASK (1ULL << 0)
  15 #define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
  16 #define PT_USER_MASK (1ULL << 2)
  17 #define PT_PWT_MASK (1ULL << 3)
  18 #define PT_PCD_MASK (1ULL << 4)
  19 #define PT_ACCESSED_SHIFT 5
  20 #define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT)
  21 #define PT_DIRTY_MASK (1ULL << 6)
  22 #define PT_PAGE_SIZE_MASK (1ULL << 7)
  23 #define PT_PAT_MASK (1ULL << 7)
  24 #define PT_GLOBAL_MASK (1ULL << 8)
  25 #define PT64_NX_SHIFT 63
  26 #define PT64_NX_MASK (1ULL << PT64_NX_SHIFT)
  27
  28 #define PT_PAT_SHIFT 7
  29 #define PT_DIR_PAT_SHIFT 12
  30 #define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT)
  31
  32 #define PT32_DIR_PSE36_SIZE 4
  33 #define PT32_DIR_PSE36_SHIFT 13
  34 #define PT32_DIR_PSE36_MASK \
  35         (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
  36
  37 #define PT64_ROOT_LEVEL 4
  38 #define PT32_ROOT_LEVEL 2
  39 #define PT32E_ROOT_LEVEL 3
  40
  41 #define PT_PDPE_LEVEL 3
  42 #define PT_DIRECTORY_LEVEL 2
  43 #define PT_PAGE_TABLE_LEVEL 1
  44
  45 #define PFERR_PRESENT_MASK (1U << 0)
  46 #define PFERR_WRITE_MASK (1U << 1)
  47 #define PFERR_USER_MASK (1U << 2)
  48 #define PFERR_RSVD_MASK (1U << 3)
  49 #define PFERR_FETCH_MASK (1U << 4)
  50
  51 int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
  52 int kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context);
  53
  54 static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm)
  55 {
  56         return kvm->arch.n_max_mmu_pages -
  57                 kvm->arch.n_used_mmu_pages;
  58 }
  59
  60 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
  61 {
  62         if (unlikely(kvm_mmu_available_pages(vcpu->kvm)< KVM_MIN_FREE_MMU_PAGES))
  63                 __kvm_mmu_free_some_pages(vcpu);
  64 }
  65
  66 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
  67 {
  68         if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
  69                 return 0;
  70
  71         return kvm_mmu_load(vcpu);
  72 }
  73
  74 static inline int is_present_gpte(unsigned long pte)
  75 {
  76         return pte & PT_PRESENT_MASK;
  77 }
  78
  79 #endif